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NO348024B1 - Vehicle engine control method and vehicle body control module - Google Patents

Vehicle engine control method and vehicle body control module Download PDF

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Publication number
NO348024B1
NO348024B1 NO20211110A NO20211110A NO348024B1 NO 348024 B1 NO348024 B1 NO 348024B1 NO 20211110 A NO20211110 A NO 20211110A NO 20211110 A NO20211110 A NO 20211110A NO 348024 B1 NO348024 B1 NO 348024B1
Authority
NO
Norway
Prior art keywords
vehicle
door
signal
engine
temporary
Prior art date
Application number
NO20211110A
Other languages
Norwegian (no)
Other versions
NO20211110A1 (en
Inventor
Mingshi Xie
Daocheng Wang
Wanrong Wang
Xiaobin Shen
Yanzi Chen
Original Assignee
Saic Motor Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Saic Motor Corp Ltd filed Critical Saic Motor Corp Ltd
Publication of NO20211110A1 publication Critical patent/NO20211110A1/en
Publication of NO348024B1 publication Critical patent/NO348024B1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K28/00—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions
    • B60K28/10—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the vehicle 
    • B60K28/12—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the vehicle  responsive to conditions relating to doors or doors locks, e.g. open door
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T7/00—Brake-action initiating means
    • B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18—Propelling the vehicle
    • B60W30/18009—Propelling the vehicle related to particular drive situations
    • B60W30/18018—Start-stop drive, e.g. in a traffic jam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18—Propelling the vehicle
    • B60W30/18009—Propelling the vehicle related to particular drive situations
    • B60W30/18054—Propelling the vehicle related to particular drive situations at stand still, e.g. engine in idling state
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D17/00—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling
    • F02D17/04—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling rendering engines inoperative or idling, e.g. caused by abnormal conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
    • F02D29/02—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/042—Introducing corrections for particular operating conditions for stopping the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits specially adapted for starting of engines
    • F02N11/0814—Circuits specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
    • F02N11/0818—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode
    • F02N11/0833—Vehicle conditions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T7/00—Brake-action initiating means
    • B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
    • B60T7/14—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger operated upon collapse of driver
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2540/00—Input parameters relating to occupants
    • B60W2540/12—Brake pedal position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2540/00—Input parameters relating to occupants
    • B60W2540/223—Posture, e.g. hand, foot, or seat position, turned or inclined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
    • B60W50/08—Interaction between the driver and the control system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/50—Input parameters for engine control said parameters being related to the vehicle or its components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/60—Input parameters for engine control said parameters being related to the driver demands or status
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N2200/00—Parameters used for control of starting apparatus
    • F02N2200/10—Parameters used for control of starting apparatus said parameters being related to driver demands or status
    • F02N2200/106—Driver presence, e.g. detected by door lock, seat sensor or belt sensor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
  • Regulating Braking Force (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Control Of Driving Devices And Active Controlling Of Vehicle (AREA)

Description

VEHICLE ENGINE CONTROL METHOD AND VEHICLE BODY CONTROL MODULE
FIELD
The present invention relates to the technical field of vehicle control and in particular to a method of controlling a vehicle engine and a vehicle body control module.
BACKGROUND
With the development of automotive technology, there is an increasing demand for vehicle intelligence. Currently, there are control methods which can start and switch off an engine without any physical control button. This eliminates the need for users to press a control button and also makes the operational control panel of a vehicle simpler and easier. For example, one of the existing solutions of switching off an engine is to detect the opening of the main driver's door when the vehicle is stopped and the gear is in park position, to determine that the user needs to leave the vehicle and switch off the engine. Thus, instead of the user actively pressing any control button to switch off the engine, the vehicle engine is switched off when the main driver's door is detected to be open.
However, the above method lacks flexibility as the vehicle engine is switched off only in the case that the vehicle stops and the door is to open. In real-life use, it usually takes a while to restart the engine. Thus, it happens when the driver does not desire the engine to be stopped after leaving the vehicle. One Scenario is the driver leaves the vehicle for a break and then will return to the vehicle in a very short time. It would be a waste of the driver's time to restart the engine if the engine is stopped by the above mentioned solution.
Therefore, a more flexible engine control method to meet various driving needs of the driver in order to enhance the driver's driving experience is desired.
Publication EP2826980A1 discloses a seat belt fastening detector that detects a fastening state or a non-fastening state of a driver's seat belt, a door open/close detector that detects an open state and a closed state of a vehicle door, and control means that restarts, in a stopped state of the engine caused by an idling stop control, the engine when a predetermined restart condition is satisfied. In cases where the vehicle door is in the open state with the driver's seat belt being in the fastening state or the vehicle door is in the closed state with the driver's seat belt being in the non-fastening state, the engine is allowed to be restarted when the restart condition is satisfied. In a case where the vehicle door is in the open state and the driver's seat belt is in the non-fastening state, the engine will be prohibited from being restarted even if the predetermined restart condition is satisfied.
SUMMARY
In order to at least solve the above technical problems, the present invention provides a vehicle engine control method and device for more flexible engine off operation to enhance the driving experience of the driver.
Considering the above, the present invention provides technical solutions comprising the following.
In one aspect, the present invention provides a method for controlling an engine of a vehicle, the method being applied to a vehicle body control module (BCM) of the vehicle, the vehicle including a door-state switch and a brake sensor both connected to the BCM; the method comprising:
obtaining a door-state signal sent by the door-state switch;
determining whether a brake signal sent by the brake sensor is received or not when it is determined that the door-state signal indicates that a main driver's door of the vehicle is open;
if the brake signal is not received, controlling the engine of the vehicle to be turned off; and
if the brake signal is received, keeping the engine from being turned off and determining that the vehicle enters a temporary-parking mode wherein the BCM is connected to a seat gravity sensor in the main driver's seat of the vehicle, the method further comprising:
obtaining a first gravity signal sent by the seat gravity sensor; and
wherein determining that the vehicle enters the temporary-parking mode further comprises:
determining that the vehicle enters the temporary-parking mode when a door-state signal re-indicates that the main driver's door of the vehicle is closed and the first gravity signal indicates that the vehicle's main driver's seat is unoccupied; and
obtaining a second gravity signal from the seat gravity sensor when a door-state signal re-indicates that the main driver's door of the vehicle is closed;
maintaining the temporary-parking mode when the second gravity signal indicates that the main driver's seat of the vehicle is unoccupied; and
exiting the temporary-parking mode when the second gravity signal indicates that the main driver's seat of the vehicle is occupied.
Optionally, the BCM is connected to an automatic transmission control unit (TCU) of the vehicle, the method further comprising:
obtaining a gear signal sent by the TCU; and
wherein obtaining the door-state signal sent by the door-state switch comprises:
obtaining the door-state signal sent by the door-state switch when it is determined, based on the gear signal, that the vehicle is in gear P.
Optionally, the method further comprises:
determining that the vehicle exits the temporary-parking mode when a door-state signal reindicates that the main driver's door of the vehicle is closed and the first gravity signal indicates that the vehicle's main driver's seat is occupied.
Optionally, the method further comprises, after the vehicle enters the temporary-parking mode:
maintaining the temporary-parking mode when a door-state signal re-indicates that the main driver's door of the vehicle is open.
Optionally, the BCM is connected to a power control module of the vehicle controlling the engine off of the vehicle, the method comprising:
sending an engine off signal to the power control module to cause the power control module to control the engine to be turned off based on the engine off signal.
In a further aspect, the present invention provides a vehicle body control module (BCM) of a vehicle, the vehicle including a door-state switch and a brake sensor both connected to the BCM; the BCM comprising:
a door-state signal obtaining unit configured to obtain a door-state signal sent by the doorstate switch;
a brake signal receiving unit configured to, when it is determined that the door-state signal indicates that the main driver's door of the vehicle is open, determine whether a brake signal is received from the brake sensor or not; and
an engine control unit configured to control an engine of the vehicle to be turned off if the brake signal is not received, and to keep the engine from being turned off and determine that the vehicle enters a temporary-parking mode if the brake signal is received the gravity signal obtaining unit is further configured to, after the vehicle enters the temporary-parking mode:
obtain a second gravity signal from the seat gravity sensor when a door-state signal reindicates that the main driver's door of the vehicle is closed; and
wherein the engine control unit is further configured to maintain the temporary-parking mode when the second gravity signal indicates that the vehicle's main driver's seat is unoccupied, and to exit the temporary-parking mode when the second gravity signal indicates that the vehicle's main driver's seat is occupied.
Optionally, the BCM is connected to an automatic transmission control unit (TCU) of the vehicle, the BCM further comprising:
a gear signal obtaining unit configured to obtain a gear signal sent by the TCU;
wherein the door-state signal obtaining unit is further configured to obtain a door-state signal sent by the door-state switch when it is determined, based on the gear signal, that the vehicle's gear is in gear P.
Optionally, determining that the vehicle enters the temporary-parking mode further comprises:
determining that the vehicle exits the temporary-parking mode when a door-state signal reindicates that the main driver's door of the vehicle is closed and the first gravity signal indicates that the main driver's seat of the vehicle is occupied.
Optionally, the vehicle body control module is configured to, after the vehicle enters the temporary-parking mode:
maintain the temporary-parking mode when a door-state signal re-indicates that the main driver's door of the vehicle is open.
Optionally, the BCM is connected to a power control module of the vehicle, the engine control unit comprising:
an engine off signal sending subunit configured to send an engine off signal to the power control module to cause the power control module to control the engine off based on the engine off signal.
In a yet aspect, the present invention provides a vehicle engine control system comprising a vehicle body control module (BCM), a door-state switch, a brake sensor, and an engine;
the door-state switch, the brake sensor and the engine being connected to the BCM; and
the BCM being configured to control the engine by the method described above.
Optionally, the vehicle engine control system further comprises a gravity sensor for the main driver's seat of the vehicle;
the gravity sensor being connected to the BCM; and
the gravity sensor being configured to detect whether the main driver's seat of the vehicle is occupied or not.
Optionally, the vehicle engine control system further comprises an automatic transmission control unit (TCU) of the vehicle,
the TCU being connected to the BCM; and
the TCU being configured to detect whether the vehicle is in gear P or not.
As can be seen from the above, technical solutions of the present invention have at least the following benefits.
The present invention provides a vehicle engine control method and a vehicle body control module. The method comprises: obtaining a door-state signal sent by the door-state switch; determining whether a brake signal sent by the brake sensor is received or not when it is determined that the door-state signal indicates that the main driver's door of the vehicle is open; if the brake signal is not received, controlling the engine of the vehicle to be turned off; and if the brake signal is received, keeping the engine from being turned off and determining that the vehicle enters a temporary-parking mode. The method of the present invention makes a more accurate determination of the driver's intention such that for the driver the vehicle engine off operation can be flexibly controlled by a brake sensor, improving driving experience.
BRIEF DESCRIPTION OF DRAWINGS
In order to better illustrate the technical solutions of the embodiments of the present invention, brief descriptions of the accompanying drawings are illustrated. It is to be appreciated that the accompanying drawings in the following description are only reflections of exemplary embodiments of the present invention, and other embodiments can be derived from these drawings without inventive work for a person of ordinary skill in the art.
Figure 1 shows a schematic flow chart of a vehicle engine control method of an embodiment of the present invention.
Figure 2 shows a schematic flow chart of another vehicle engine control method of an embodiment of the present invention.
Figure 3 shows a schematic structure of a vehicle body control module of an embodiment of the present invention.
Figure 4 shows a schematic structure of a vehicle engine control system of an embodiment of the present invention.
Figure 5 shows a schematic structure of a vehicle engine control system of another embodiment of the present invention.
DESCRIPTION OF EMBODIMENTS
As described above, the method of the prior art of starting and switching off an engine without a control button will cause the vehicle engine to stop once the user opens a vehicle door after parking, which is not sufficient to meet various driving needs and not flexible.
The present invention with its embodiments provides a vehicle engine control method, which makes a more accurate determination of the driver's intention such that for the driver the vehicle engine off operation can be flexibly controlled by a brake sensor, improving driving experience. It should be noted that the method provided in the embodiments of this invention is applied to vehicle’s BCM (body control module). The BCM is connected to a door-state switch on the vehicle, and the BCM is also connected to a brake sensor on the vehicle.
In order to provide those in the art with a better understanding of the present invention, the technical solutions of embodiments of the present invention will be described clearly and in detail below, in conjunction with the accompanying drawings of the embodiments of the present invention. It is easy to know that the described embodiments are only part but not all of the embodiments of the present invention. Based on the embodiments in this invention, all other embodiments obtained without inventive work by a person of ordinary skill in the art fall within the scope of protection of this invention.
Embodiments of Methods
Referring to Figure 1, this flow chart shows a schematic flow of a vehicle engine control method provided by the present invention.
As shown in Figure 1, this engine control method provided by an embodiment of the present invention comprises step S101 to step S103.
S101: obtaining a door-state signal sent by a door-state switch.
In an embodiment, for reducing the delay of signals, the BCM and the door-state switch may be connected by hard wiring and the door-state signal may be realized as a hard-wired signal. The hard-wired signal has very little delay and good stability. This enables the doorstate signal sent by the door-state switch be obtained at the moment the door opens and not easily disturbed by environmental factors. By this way, the present invention provides a prompt and robust engine control method.
In a possible embodiment, for ensuring the safety of engine off and further for determining the driver's intention for engine off, the BCM applied in the method of this invention may further be connected to an automatic transmission control unit (TCU) of the vehicle via CAN (Controller Area Network) of the vehicle. In this way, the method of the present invention further comprises obtaining a gear signal sent by the TCU. In this case, the “obtaining a door-state signal sent by a door-state switch” as described above comprises, in particular, obtaining a door-state signal sent by a door-state switch when the gear of the vehicle is determined to be in gear P based on the gear signal. It will be appreciated that in the engine control method provided in this embodiment of the present invention, the gear position of the vehicle needs to be determined before controlling the engine off to ensure the safety of the engine off of the vehicle.
S102: determining whether a brake signal is received from a brake sensor or not when it is determined that the door-state signal indicates that the main driver's door of the vehicle is open.
It will be appreciated that by introducing the brake signal sent by the brake sensor, the method provided in the embodiment of the present invention enables the driver to control the vehicle by applying the brakes such that the driver is able to have more flexible control of the engine off of the vehicle without any physical button. In this embodiment, the BCM and the brake sensor can also be connected by hard wiring and the brake signal can be a hard-wired signal. By this way, the present invention provides a prompt and robust engine control method.
S103: controlling the vehicle engine to be turned off if no brake signal is received, avoiding the engine being turned off and determining that the vehicle enters a temporaryparking mode if a brake signal is received.
In this embodiment, if a driver tends to temporarily park the vehicle without switching off the engine, he needs to apply brakes when opening the door. In real-life use, after opening door for temporary-parking, the driver leaves the vehicle; and when the driver returns to the vehicle, the door needs to be reopened. To ensure that the driver needs not to restart the engine when returning to the vehicle, the method provided by the embodiment further comprises after the vehicle enters a temporary-parking mode: maintaining the temporaryparking mode when the door-state signal re-indicates that the main driver's door of the vehicle is open.
In real-life use, it happens when the temporary-parking mode is entered and the door opens without driver leaving the vehicle. In this case, the driver will reopen the door if he needs the engine off and leaves the vehicle. In order for the engine control method provided by the present invention to distinguish this scenario from the scenario described in the previous paragraph, an embodiment of the present invention may adopt a seat gravity sensor to determine whether the driver leaves the vehicle or not after the temporaryparking mode on. As an embodiment, the BCM of this embodiment in the present invention may also be connected to the seat gravity sensor in the main driver's seat of the vehicle. In this way, the method provided by this embodiment may further comprise: obtaining a first gravity signal sent by a seat gravity sensor. In this case, “determining that the vehicle enters a temporary-parking mode” comprises: determining that the vehicle enters a temporary-parking mode when the door-state signal re-indicates that the main driver's door of the vehicle is closed and the first gravity signal indicates that the main driver's seat of the vehicle is unoccupied. Moreover, determining that the vehicle exits the temporary-parking mode when the door-state signal re-indicates that the main driver's door of the vehicle is closed and the first gravity signal indicates that the main driver's seat of the vehicle is occupied.
It will be appreciated that the method provided by the embodiment of this invention controls the state of the vehicle after closing the main driver's door based on determining whether the main driver's seat is occupied or not after closing the main driver's door. When the main driver's seat is not occupied after closing the main driver's door, it is determined that the driver has exited the vehicle and the temporary-parking mode is entered at that point. In this way, when the driver opens the door and returns to the vehicle, the engine will not be turned off once the door is opened, but remains in the temporary-parking mode described. When the main driver's seat is occupied after closing the main driver's door, it is determined that the driver is still in the vehicle, and the temporary-parking mode is exited. In this way, when the driver needs the door to open and the engine off, the engine will be turned off with the opening of the door. In other words, in this example of the invention, if the vehicle is in a temporary-parking mode, the vehicle engine will not be turned off when the door is opened; and if the vehicle exits the temporary-parking mode, the vehicle engine will be turned off if the driver applies no brake for the vehicle receives a brake signal when the door is opened.
In real-life use, it happens that after the temporary-parking mode is entered and the driver leaves the vehicle, the vehicle door needs to be reopened and reclosed due to for example accessing items in the vehicle. Accordingly, the method provided by the embodiment of the present invention further comprises obtaining a second gravity signal from the seat gravity sensor when the door-state signal re-indicates that the main driver's door of the vehicle is closed; maintaining the temporary-parking mode when the second gravity signal indicates that the main driver's seat of the vehicle is unoccupied; and exiting the temporary-parking mode when the second gravity signal indicates that the main driver's seat of the vehicle is occupied.
As a possible embodiment, the BCM in the embodiment of the present invention may also be connected to a power control module of the vehicle. In this way, in the embodiment of the present invention, “controlling the vehicle engine to be turned off” comprises: sending an engine off signal to the power control module to cause the power control module to control the engine off based on the engine off signal. It should be noted that in this embodiment, the BCM may be connected to the power control module of the vehicle via CAN for example considering conditions in the vehicle.
Referring to Figure 2, the diagram shows a flow chart of another vehicle engine control method provided by an embodiment of the present invention.
As shown in Figure 2, the vehicle engine control method provided by this embodiment is a more elaborate flow chart than that shown in Figure 1. Since the relevant steps have already been explained in detail with Figure 1, a detailed description of the relevant steps will not be unnecessarily repeated here. The following is only a brief description of the steps in Figure 2, a detailed explanation of the steps in Figure 2 can be found in the relevant expression of the corresponding steps in Figure 1 above. The method of this embodiment comprises following.
After the vehicle stops, if the driver opens the main driver's door, a determination is made on whether a brake has been applied. If no brake is applied, the vehicle engine will be turned off. If a brake is applied, the vehicle engine will not be turned off and the vehicle enters a temporary-parking mode. When the main driver's door is closed, it determines whether the main driver's seat is occupied. If the driver's seat is occupied, the vehicle exits the temporary-parking mode. Afterwards, the vehicle will return to the control state as the vehicle just stopped. At this time, if the driver applies a brake when opening the driver's door, the vehicle will re-enter the temporary-parking mode. If the main driver's seat is unoccupied, the temporary-parking mode will be maintained and the vehicle's engine will not be turned off. When the driver reopens the main door, the temporary-parking mode is maintained and when the driver closes the main door, it is determined whether the main seat is occupied. If the driver's seat is occupied, the temporary-parking mode is exited, and if the driver's seat is not occupied, the temporary-parking mode will be re-entered. At this point, if the door re-opens and re-closes, the vehicle engine is controlled in the same way as described above. This is to say, according to the embodiment of the present invention, in the temporary-parking mode, the control method for vehicle start is the same, regardless of the main driver's door of the vehicle for the first time or not to open and close.
From the above, it can be seen that the method provided by the embodiment of the present invention makes a more accurate determination of the vehicle driver's intention. This enables driver to control engine off by applying brake(s). Moreover, by receiving the gravity signal sent by the seat gravity sensor, a determination is made as to whether the main driver's seat is occupied. By this, various situations that the driver may encounter when parking the vehicle are taken into considerations, making the control of the engine off more flexible and improving the driver's driving experience.
Embodiments of Devices
Based on the vehicle engine control method above, the present invention further provides a vehicle body control module (BCM) accordingly.
Referring to Figure 3, it shows a schematic structure of a vehicle body control module provided by an embodiment of the present invention. A door-state switch and a brake sensor of a vehicle are connected to a BCM. As shown in Figure 3, the vehicle body control module (BCM) provided by the embodiment of the present invention comprises:
a door-state signal obtaining unit 100 for obtaining a door-state signal sent by the doorstate switch;
a brake signal receiving unit 200 for determining whether a brake signal is received from the brake sensor when it is determined that the door-state signal indicates that the main driver's door of the vehicle is open; and
an engine control unit 300 for controlling the engine of the vehicle to be turned off if a brake signal is not received, and for keeping the engine from being turned off if a brake signal is received and determining that the vehicle is in a temporary-parking mode.
As a possible embodiment, the BCM may be connected to an automatic transmission control unit (TCU) of the vehicle. Accordingly, the BCM further comprises: a gear signal obtaining unit for obtaining a gear signal sent by the TCU.
The door-state signal obtaining unit may be used for obtaining a door-state signal sent by the door-state switch when it is determined that the vehicle's gear is in gear P based on the gear signal.
As a possible embodiment, the BCM may be connected to a seat gravity sensor in the main driver's seat of the vehicle. Accordingly, the BCM further comprises: a gravity signal obtaining unit for obtaining a first gravity signal sent by the seat gravity sensor.
“determining that the vehicle is in a temporary-parking mode” comprises: determining that the vehicle is in a temporary-parking mode when the door-state signal re-indicates that the main driver's door of the vehicle is closed and the first gravity signal indicates that the main driver's seat of the vehicle is unoccupied; and determining that the vehicle exits the temporary-parking mode when the door-state signal re-indicates that the main driver's door of the vehicle is closed and the first gravity signal indicates that the main driver's seat of the vehicle is occupied.
As a possible embodiment, the engine control unit may also be used to maintain the temporary-parking mode when the door-state signal re-indicates that the main driver's door of the vehicle is open.
As a possible embodiment, the gravity signal obtaining unit, after the vehicle enters the temporary-parking mode, may also be used to obtain a second gravity signal from the seat gravity sensor when the door-state signal re-indicates that the main driver's door of the vehicle is closed.
The engine control unit may further be used to maintain the temporary-parking mode when the second gravity signal indicates that the main driver's seat of the vehicle is unoccupied; and to exit the temporary-parking mode when the second gravity signal indicates that the main driver's seat of the vehicle is occupied.
In an embodiment of the present invention, the BCM may be connected to a power control module of the vehicle. Accordingly, the engine control unit comprises an engine off signal sending subunit for sending an engine off signal to the power control module for the power control module to control the engine off based on the engine off signal.
Embodiments of Systems
According to the method and the device described above, the present invention also provides a vehicle engine control system.
Referring to Figure 4, it shows a schematic structure of a vehicle engine control system provided by an embodiment of the present invention. As shown in Figure 4, it provides a vehicle engine control system comprising: a vehicle body control module (BCM), a doorstate switch 2000, a brake sensor 3000 and an engine 4000. The door-state switch 2000, the brake sensor 3000 and the engine 4000 are connected to the BCM. The BCM may be used to control the vehicle engine with the method described above.
As a possible embodiment, Figure 5 shows a schematic structure of an alternative vehicle engine control system provided by an embodiment of the present invention. As shown in Figure 5, the vehicle engine control system provided in this embodiment, compared to the system shown in Figure 4, further comprises a seat gravity sensor 5000 in the main driver's seat of the vehicle; the gravity sensor 5000 is connected to the BCM; the gravity sensor 5000 is used to detect whether in the main driver's seat of the vehicle is occupied or not; and an automatic transmission control unit (TCU) of the vehicle; the TCU is connected to the BCM; the TCU is used to detect whether the gear of the vehicle is in gear P or not.
As can be seen from the above, the systems provided by the embodiments of the present invention make a more accurate determination of the vehicle driver's intention to turn off the engine with a brake sensor. Moreover, with a seat gravity sensor whether the main driver's seat is occupied or not is determined. This way further takes into account various situations that the driver may encounter when parking a vehicle, making the control of the vehicle engine off more flexible and improving driver's driving experience.
As can be seen from the above, it is easy to know for those skilled in the art that all or part of the steps in the method of the above embodiments can be achieved with the help of software and/or hardware. Based on this understanding, the technical solution of the present invention, in essence or as a contribution to the prior art, may be embodied in the form of a software product, which may be stored in a storage medium, such as ROM/RAM, disk, CD-ROM, etc., comprising instruction(s) to enable a computer device (such as a personal computer, a server, or a network communication device like a media gateway) to carry out the method(s) described in the embodiment(s) or part of the embodiment(s) of the present invention.
It should be noted that the embodiments of the present invention are described in a progressive manner, with each embodiment focusing on what is different from the other embodiments. Thus, referring to each other for the similarities between embodiments is sufficient to understand the embodiments for the skilled in the art. For the methods disclosed in the embodiments, the description is relatively brief. For more details of the methods, please refer to the corresponding system section of this description.
It should also be noted that in this document, the terms "including", "comprising" or any other variants/equivalents thereof are intended to cover non-exclusive inclusion. This means a process, method, article or device comprising a range of elements including not only those elements, but also other elements not explicitly listed and/or inherent to such a process, method, article or device. Unless the context requires otherwise, the element(s) defined by the statement "including/comprising a ......" does not exclude the existence of additional identical element(s) in the process, method, article or device including the element(s).
Any reference to prior art in this specification is not, and should not be taken as an acknowledgement, or any suggestion that, the prior art forms part of the common general knowledge.
The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Accordingly, the present invention will not be limited to those embodiments shown herein, but will be subject to the widest scope consistent with the principles and novel features disclosed herein.

Claims (13)

1. A method for controlling an engine of a vehicle, the method being applied to a vehicle body control module (BCM) of the vehicle, the vehicle including a door-state switch (3000) and a brake sensor (2000) both connected to the BCM; the method comprising:
obtaining a door-state signal sent by the door-state switch (3000),
determining whether a brake signal sent by the brake sensor (2000) is received or not when it is determined that the door-state signal indicates that a main driver's door of the vehicle is open;
if the brake signal is not received, controlling the engine of the vehicle to be turned off; and
if the brake signal is received, keeping the engine from being turned off and determining that the vehicle enters a temporary-parking mode wherein the BCM is connected to a seat gravity sensor (5000) in the main driver's seat of the vehicle, the method further comprising:
obtaining a first gravity signal sent by the seat gravity sensor (5000); and
wherein determining that the vehicle enters the temporary-parking mode further comprises:
determining that the vehicle enters the temporary-parking mode when a door-state signal re-indicates that the main driver's door of the vehicle is closed and the first gravity signal indicates that the vehicle's main driver's seat is unoccupied; and
obtaining a second gravity signal from the seat gravity sensor when a door-state signal re-indicates that the main driver's door of the vehicle is closed;
maintaining the temporary-parking mode when the second gravity signal indicates that the main driver's seat of the vehicle is unoccupied; and
exiting the temporary-parking mode when the second gravity signal indicates that the main driver's seat of the vehicle is occupied.
2. The method according to claim 1, wherein the BCM is connected to an automatic transmission control unit (TCU) of the vehicle, the method further comprising:
obtaining a gear signal sent by the TCU; and
wherein obtaining the door-state signal sent by the door-state switch (3000) comprises:
obtaining the door-state signal sent by the door-state switch when it is determined, based on the gear signal, that the vehicle is in gear P.
3. The method according to claim 1, further comprising
determining that the vehicle exits the temporary-parking mode when a door-state signal reindicates that the main driver's door of the vehicle is closed and the first gravity signal indicates that the vehicle's main driver's seat is occupied.
4. The method according to claim 1, further comprising, after the vehicle enters the temporary-parking mode:
maintaining the temporary-parking mode when a door-state signal re-indicates that the main driver's door of the vehicle is open.
5. The method according to any one of claims 1-4, wherein the BCM is connected to a power control module of the vehicle controlling the engine off of the vehicle, the method comprising:
sending an engine off signal to the power control module to cause the power control module to control the engine to be turned off based on the engine off signal.
6. A vehicle body control module (BCM) of a vehicle, the vehicle including a doorstate switch (3000) and a brake sensor (2000) both connected to the BCM; the BCM comprising:
a door-state signal obtaining unit (100) configured to obtain a door-state signal sent by the door-state switch (3000);
a brake signal receiving unit (200) configured to, when it is determined that the door-state signal indicates that a main driver's door of the vehicle is open, determine whether a brake signal is received from the brake sensor (2000) or not; and
an engine control unit (300) configured to control an engine of the vehicle to be turned off if the brake signal is not received, and to keep the engine from being turned off and determine that the vehicle enters a temporary-parking mode if the brake signal is received wherein the BCM is connected to a seat gravity sensor (5000) in the main driver's seat of the vehicle, and the BCM further comprises a gravity signal obtaining unit configured to obtain a first gravity signal sent by the seat gravity sensor (5000);
wherein determining that the vehicle enters the temporary-parking mode further comprises determining that the vehicle enters the temporary-parking mode when a door-state signal re-indicates that the main driver's door of the vehicle is closed and the first gravity signal indicates that the main driver's seat of the vehicle is unoccupied;
wherein the gravity signal obtaining unit is further configured to, after the vehicle enters the temporary-parking mode, obtain a second gravity signal from the seat gravity sensor when a door-state signal re-indicates that the main driver's door of the vehicle is closed; and
wherein the engine control unit is further configured to, after the vehicle enters the temporary parking mode, maintain the temporary-parking mode when the second gravity signal indicates that the vehicle's main driver's seat is unoccupied, and to exit the temporary-parking mode when the second gravity signal indicates that the vehicle's main driver's seat is occupied.
7. The vehicle body control module according to claim 6, wherein the BCM is connected to an automatic transmission control unit (TCU) of the vehicle, the BCM further comprising:
a gear signal obtaining unit configured to obtain a gear signal sent by the TCU;
wherein the door-state signal obtaining unit is further configured to obtain a door-state signal sent by the door-state switch (3000) when it is determined, based on the gear signal, that the vehicle's gear is in gear P.
8. The vehicle body control module according to either claim 6 or claim 7, wherein determining that the vehicle enters the temporary-parking mode further comprises:
determining that the vehicle exits the temporary-parking mode when a door-state signal reindicates that the main driver's door of the vehicle is closed and the first gravity signal indicates that the main driver's seat of the vehicle is occupied.
9. The vehicle body control module according to any one of claim6 to 8, wherein the vehicle body control module is configured to, after the vehicle enters the temporaryparking mode:
maintain the temporary-parking mode when a door-state signal re-indicates that the main driver's door of the vehicle is open.
10. The vehicle body control module according to any one of claims 6-9, wherein the BCM is connected to a power control module of the vehicle, the engine control unit comprising:
an engine off signal sending subunit configured to send an engine off signal to the power control module to cause the power control module to control the engine off based on the engine off signal.
11. A vehicle engine control system comprising a vehicle body control module (BCM), a door-state switch (3000), a brake sensor (2000) and an engine (4000);
the door-state switch, the brake sensor and the engine being connected to the BCM; and
the BCM being configured to control the engine (4000) by the method according to any one of claims 1-5.
12. The vehicle engine control system according to claim 11 further comprising a gravity sensor (5000) for the main driver's seat of the vehicle;
the gravity sensor being connected to the BCM; and
the gravity sensor being configured to detect whether the main driver's seat of the vehicle is occupied or not.
13. The vehicle engine control system according to claim 11 further comprising an automatic transmission control unit (TCU) of the vehicle,
the TCU being connected to the BCM; and
the TCU being configured to detect whether the vehicle is in gear P or not.
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