CN111005812A - Vehicle-Based Control Systems and Vehicles - Google Patents
Vehicle-Based Control Systems and Vehicles Download PDFInfo
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- CN111005812A CN111005812A CN201911347218.3A CN201911347218A CN111005812A CN 111005812 A CN111005812 A CN 111005812A CN 201911347218 A CN201911347218 A CN 201911347218A CN 111005812 A CN111005812 A CN 111005812A
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D21/00—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas
- F02D21/06—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air
- F02D21/08—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air the other gas being the exhaust gas of engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
- F02M31/04—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture
- F02M31/06—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture by hot gases, e.g. by mixing cold and hot air
- F02M31/08—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture by hot gases, e.g. by mixing cold and hot air the gases being exhaust gases
- F02M31/087—Heat-exchange arrangements between the air intake and exhaust gas passages, e.g. by means of contact between the passages
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- 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
- F02D2200/70—Input parameters for engine control said parameters being related to the vehicle exterior
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supercharger (AREA)
Abstract
The application provides a control system and vehicle based on vehicle relates to the traffic field, and the system includes: the air inlet heating grid is arranged in the cavity structure, one end of the cavity structure is connected with the first end of the turbo-charger vortex exhaust pipeline through a cavity air inlet pipeline, a first valve is arranged on the cavity air inlet pipeline, the second end of the turbo-charger vortex exhaust pipeline is connected with the turbo-charger, and the other end of the cavity structure is connected with the cavity exhaust pipeline; the supercharger is used for discharging the waste gas which pushes the turbine to do work into a gas exhaust pipeline behind the supercharger turbine; and the controller is used for acquiring an external environment temperature value and controlling the first valve to be opened when the environment temperature value is determined to be smaller than an environment temperature critical threshold value, so that the exhaust gas in the exhaust pipeline after the turbocharger is whirled enters the cavity structure. The problem that the air inflow of the engine is influenced and the power of the engine is insufficient due to the fact that the air inlet heating grid is frozen can be solved.
Description
Technical Field
The application relates to the technical field of traffic, in particular to a control system based on a vehicle and the vehicle.
Background
With the continuous development of society, vehicles have become the main transportation tool for users to go out. At present, in order to ensure that an engine in a vehicle can be normally started in a low-temperature environment, an intake air heating grill is generally arranged in front of the engine. The gas enters the engine through the intake air heating grill. Specifically, when the engine is started in a low-temperature environment, the temperature of gas entering the engine is increased by heating the intake air heating grille, so that the normal starting of the engine is guaranteed.
In the prior art, after the engine is started, the intake air heating grid is not heated any more.
However, in the prior art, an Exhaust Gas Recirculation (EGR) route is often adopted for the engine, and the use of the EGR route may increase the moisture content of the Gas to be introduced into the engine, so after the engine is started, if the engine is operated in a low-temperature environment, the intake heating grid is not heated any more, and therefore, the Gas with the increased moisture content may be frozen at the intake heating grid when passing through the intake heating grid, thereby affecting the air intake amount of the engine, further causing insufficient power of the engine, and most possibly causing engine stall.
Disclosure of Invention
The application provides a control system and vehicle based on vehicle can solve because of the heating grid department that admits air freezes, and influence the air input of engine, causes engine power not enough, the engine stall's problem appears very probably.
In a first aspect, the present application provides a vehicle-based control system, the system comprising:
the air inlet heating grid is arranged in the cavity structure, one end of the cavity structure is connected with a first end of a supercharger vortex exhaust pipeline through a cavity air inlet pipeline, a first valve is arranged on the cavity air inlet pipeline, a second end of the supercharger vortex exhaust pipeline is connected with the supercharger, and the other end of the cavity structure is connected with a cavity exhaust pipeline;
the supercharger is used for pushing the turbine to do work by utilizing the exhaust gas discharged by the engine and discharging the exhaust gas after pushing the turbine to do work into the exhaust pipeline behind the turbine of the supercharger;
the controller is used for acquiring an external environment temperature value and controlling the first valve to be opened when the environment temperature value is determined to be smaller than a preset environment temperature critical threshold value, so that exhaust gas in the exhaust pipeline after the turbocharger is whirled enters the cavity structure;
the waste gas entering the cavity structure is exhausted to the outside through one end of the cavity exhaust pipeline far away from the cavity structure; and residual exhaust gas in the supercharger vortex exhaust pipeline is exhausted to the outside through a third end of the supercharger vortex exhaust pipeline.
Further, the system further comprises: the third end of the supercharger vortex exhaust pipeline is communicated with the gas purification device, and one end of the cavity exhaust pipeline, which is far away from the cavity structure, is connected with the gas purification device;
and the gas purification device is used for purifying the waste gas entering the gas purification device and discharging the purified waste gas to the outside.
Furthermore, one end of the cavity exhaust pipeline, which is far away from the cavity structure, is connected with a fourth end of the supercharger vortex exhaust pipeline, wherein the distance from the second end to the first end is smaller than the distance from the fourth end to the first end, and a second valve is arranged on the cavity exhaust pipeline;
the controller is further used for controlling the second valve to be opened after controlling the first valve to be opened, so that the exhaust gas entering the cavity structure enters the supercharger vortex exhaust pipeline through one end, far away from the cavity structure, of the cavity exhaust pipeline, and is discharged into the purifying device through a third end of the supercharger vortex exhaust pipeline.
Further, the system further comprises: the first temperature sensor is arranged on the air inlet pipe and is positioned at the front end of the air inlet heating grid;
the first temperature sensor is used for detecting an intake temperature value and sending the intake temperature value to the controller;
the controller is specifically configured to, when it is determined that the ambient temperature value is smaller than the ambient temperature critical threshold value, obtain an intake temperature value, determine, according to the intake temperature value, a first opening value corresponding to the first valve, and control, according to the first opening value, the first valve to open.
Further, the controller is further configured to obtain a current rotation speed and a current fuel injection amount of an engine in the vehicle when it is determined that the ambient temperature value is smaller than the ambient temperature critical threshold; determining a second opening value corresponding to the current rotating speed and the current fuel injection quantity according to a corresponding relation among a preset rotating speed, the fuel injection quantity and the second opening value;
and the controller is specifically used for determining the first opening value according to the determined second opening value and the difference value between the inlet air temperature value and the inlet air temperature set value.
Further, the controller is specifically configured to determine the first opening value according to the determined second opening value, the ambient temperature value, and a difference between the intake air temperature value and the intake air temperature set value.
Further, the controller is specifically configured to determine an environment correction coefficient according to the environment temperature value; determining a product of the environment correction coefficient and the determined second opening value as a third opening value; and determining a first opening value according to the third opening value and the difference value between the inlet air temperature value and the inlet air temperature set value.
Further, the system further comprises: a second temperature sensor, wherein the second temperature sensor is disposed outside of a vehicle;
and the second temperature sensor is used for acquiring an environment temperature value outside the vehicle and sending the environment temperature value to the controller.
Further, the controller includes: an Electronic Control Unit (ECU).
In a second aspect, the present application provides a vehicle having a vehicle-based control system as defined in any one of the first aspects provided therein.
The present application provides a vehicle-based control system and a vehicle, the control system comprising: the air inlet heating grid is arranged in the cavity structure, one end of the cavity structure is connected with a first end of an exhaust pipeline behind a supercharger vortex through a cavity air inlet pipeline, a first valve is arranged on the cavity air inlet pipeline, a second end of the exhaust pipeline behind the supercharger vortex is connected with the supercharger, and the other end of the cavity structure is connected with the cavity exhaust pipeline; the supercharger is used for pushing the turbine to do work by utilizing the exhaust gas discharged by the engine and discharging the exhaust gas after pushing the turbine to do work into a turbo rear exhaust pipeline of the supercharger; the controller is used for obtaining an external environment temperature value, and when the environment temperature value is determined to be smaller than a preset environment temperature critical threshold value, namely when the vehicle is determined to run in a low-temperature environment, the first valve is controlled to be opened, so that high-temperature waste gas in the exhaust pipeline after the supercharger is whirled enters the cavity structure, the temperature of the air inlet heating grid is improved through the high-temperature waste gas, the air inlet heating grid is prevented from being frozen, the air inlet quantity of the engine is improved, the performance of the engine is improved, and the engine is prevented from being flameout.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
FIG. 1 is a first schematic structural diagram of a vehicle provided herein;
FIG. 2 is a second schematic structural view of a vehicle according to the present disclosure;
FIG. 3 is a schematic structural diagram of a vehicle-based control system according to an embodiment of the present disclosure;
FIG. 4 is a schematic structural diagram of a vehicle-based control system according to a second embodiment of the present disclosure;
FIG. 5 is a schematic structural diagram of a vehicle-based control system according to a third embodiment of the present application;
fig. 6 is a schematic structural diagram of a vehicle according to a fourth embodiment of the present application.
With the foregoing drawings in mind, certain embodiments of the disclosure have been shown and described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
In the prior art, after the engine is started, the intake air heating grid is not heated any more. However, if the engine is operated in a low-temperature environment, the gas containing moisture will freeze at the inlet heater grid when passing through the inlet heater grid, thereby affecting the air inlet amount of the engine, further causing insufficient power of the engine, and most likely causing engine stall.
Therefore, in order to solve the above problems, the present application provides a control system and a vehicle based on a vehicle, in which a cavity structure is added outside an intake heating grid, so when an engine operates in a low temperature environment, exhaust gas with a higher temperature discharged from a supercharger can be introduced into the cavity structure to increase the temperature of the intake heating grid through the exhaust gas with the higher temperature, thereby effectively preventing the occurrence of icing at the intake heating grid.
In addition, the application scenarios are many, and taking one of the scenarios as an example, the application can be applied to a vehicle. Fig. 1 is a schematic structural diagram of a vehicle according to the present application, which is specifically applicable to the vehicle shown in fig. 1. Fig. 2 is a schematic structural diagram ii of a vehicle provided in the present application, and as shown in fig. 2, the vehicle includes: the engine comprises a supercharger 1, an air inlet heating grid 2 and an engine 3, wherein exhaust gas generated in a cylinder of the engine 3 is output to the supercharger 1, the supercharger 1 is driven to operate through the exhaust gas, the supercharger 2 compresses new air, the compressed air is sent into the cylinder, and the air inlet heating grid 2 is used for assisting the engine 3 to start in a low-temperature environment. The application is also particularly applicable in the vehicle shown in fig. 2.
The following will explain in detail the vehicle-based control system and the vehicle provided by the present application.
Fig. 3 is a schematic structural diagram of a vehicle-based control system according to a first embodiment of the present application, and as shown in fig. 3, the system includes:
the air inlet heating grid 13 is arranged in the cavity structure 14, one end of the cavity structure 14 is connected with a first end of a supercharger vortex exhaust pipeline 16 through a cavity air inlet pipeline 15, a first valve 17 is arranged on the cavity air inlet pipeline 15, a second end of the supercharger vortex exhaust pipeline 16 is connected with the supercharger 12, and the other end of the cavity structure 14 is connected with a cavity exhaust pipeline 18.
The supercharger 12 is configured to push the turbine to do work by using exhaust gas discharged from the engine, and discharge the exhaust gas after pushing the turbine to do work into the exhaust pipe 16 after the turbine of the supercharger.
And the controller 11 is configured to obtain an external ambient temperature value, and when it is determined that the ambient temperature value is smaller than a preset ambient temperature critical threshold, control the first valve 17 to open, so that exhaust gas in the exhaust gas pipeline 16 after the turbocharger is whirled enters the cavity structure 14.
The exhaust gas entering the cavity structure 14 is exhausted to the outside through the end of the cavity exhaust pipeline 18 far away from the cavity structure 14; the remaining exhaust gas in the exhaust pipe 16 after the supercharger is discharged to the outside through the third end of the exhaust pipe 16 after the supercharger is whirled.
In the present embodiment, exhaust gas generated by combustion of oil and air in the engine cylinders is output to the supercharger 12, a turbine in the supercharger 12 is pushed by the exhaust gas to perform work, and after the turbine is pushed to perform work, the supercharger 12 discharges the portion of exhaust gas to the supercharger exhaust pipe 16 after the exhaust gas is swirled. The exhaust gas discharged into the exhaust line 16 after the supercharger has a high temperature.
The operating principle of the control system is then: the controller 11 obtains an ambient temperature value outside the vehicle, and then judges whether the ambient temperature value is less than a preset ambient temperature critical threshold value, if so, the current ambient temperature is determined to be in a low-temperature environment, so that the controller 11 controls the first valve 17 on the cavity air inlet pipeline 15 to be opened, thus, part of exhaust gas in the exhaust pipeline 16 after the supercharger whirlpool enters the cavity structure 14 through the cavity air inlet pipeline 15, and the temperature of the air inlet heating grid 13 can be increased through the exhaust gas with higher temperature entering the cavity structure 14, so that the air inlet heating grid 13 cannot be frozen even if the engine runs in the low-temperature environment. And exhaust gas entering the cavity structure 14 may be exhausted through the cavity exhaust line 18. The exhaust gas remaining in the exhaust line 16 after the supercharger vortex can be discharged through a third end of the exhaust line 18 after the supercharger vortex. The environment temperature critical threshold value can be set according to actual requirements; the first valve 17 may be a solenoid valve; the first end of the exhaust pipe 16 after the supercharger vortex is the head end of the exhaust pipe 16 after the supercharger vortex, the third end of the exhaust pipe 16 after the supercharger vortex is the tail end of the exhaust pipe 16 after the supercharger vortex, and the second end of the exhaust pipe 16 after the supercharger vortex is the position close to the head end of the exhaust pipe 16 after the supercharger vortex.
In the present embodiment, the controller 11 may also determine the opening degree of the first valve 17 to control the intake amount of the exhaust gas into the cavity structure 14. In one example, the controller 11 may determine the opening degree of the first valve 17 according to the ambient temperature value when determining that the ambient temperature is less than the ambient temperature threshold value, wherein the opening degree of the first valve 17 may be smaller as the ambient temperature value is higher.
The present application provides a vehicle-based control system, the system comprising: the air inlet heating grid is arranged in the cavity structure, one end of the cavity structure is connected with a first end of an exhaust pipeline behind a supercharger vortex through a cavity air inlet pipeline, a first valve is arranged on the cavity air inlet pipeline, a second end of the exhaust pipeline behind the supercharger vortex is connected with the supercharger, and the other end of the cavity structure is connected with the cavity exhaust pipeline; the supercharger is used for pushing the turbine to do work by utilizing the exhaust gas discharged by the engine and discharging the exhaust gas after pushing the turbine to do work into a turbo rear exhaust pipeline of the supercharger; the controller is used for obtaining an external environment temperature value, and when the environment temperature value is determined to be smaller than a preset environment temperature critical threshold value, namely when the vehicle is determined to run in a low-temperature environment, the first valve is controlled to be opened, so that high-temperature waste gas in the exhaust pipeline after the supercharger is whirled enters the cavity structure, the temperature of the air inlet heating grid is improved through the high-temperature waste gas, the air inlet heating grid is prevented from being frozen, the air inlet quantity of the engine is improved, the performance of the engine is improved, and the engine is prevented from being flameout.
Fig. 4 is a schematic structural diagram of a vehicle-based control system according to a second embodiment of the present application, and as shown in fig. 4, the system includes:
the air inlet heating grid 23 is arranged in the cavity structure 24, one end of the cavity structure 24 is connected with a first end of a supercharger vortex exhaust pipeline 27 through a cavity air inlet pipeline 26, a first valve 28 is arranged on the cavity air inlet pipeline 26, a second end of the supercharger vortex exhaust pipeline 27 is connected with the supercharger 22, a third end of the supercharger vortex exhaust pipeline 27 is communicated with the air purification device 25, the other end of the cavity structure 24 is connected with a cavity exhaust pipeline 29, and one end, far away from the cavity structure 24, of the cavity exhaust pipeline 29 is connected with the air purification device 25.
The supercharger 22 is configured to push the turbine to do work by using exhaust gas discharged from the engine, and discharge the exhaust gas after pushing the turbine to do work into the supercharger exhaust pipe 27 after swirling.
And the controller 21 is used for acquiring an external environment temperature value and controlling the first valve 28 to be opened when the environment temperature value is determined to be smaller than a preset environment temperature critical threshold value, so that the exhaust gas in the exhaust pipeline 27 after the vortex of the supercharger enters the cavity structure 24.
The exhaust gas entering the cavity structure 24 is discharged to the gas purification device 25 through one end of the cavity exhaust pipeline 29 far away from the cavity structure 24; the remaining exhaust gas in the turbo exhaust line 27 is discharged to the gas purification apparatus 25 through the third end of the turbo exhaust line 27.
And a gas purification device 25 for performing purification treatment on the exhaust gas entering the gas purification device 25 and discharging the purified exhaust gas to the outside.
In the present embodiment, exhaust gas generated by combustion of oil and air in the engine cylinder is output to supercharger 22, a turbine in supercharger 22 is pushed by the exhaust gas to do work, and supercharger 22 discharges the exhaust gas to supercharger exhaust pipe 27 after pushing the turbine to do work. The exhaust gas discharged into the supercharger turbo exhaust line 27 has a relatively high temperature.
The operating principle of the control system is then: the controller 21 obtains an ambient temperature value outside the vehicle, and then determines whether the ambient temperature value is less than a preset ambient temperature critical threshold value, if so, it is determined that the vehicle is currently in a low temperature environment, so that the controller 21 controls the first valve 28 on the cavity air inlet pipeline 26 to be opened, thus, part of exhaust gas in the exhaust pipeline 27 after the supercharger whirlpool enters the cavity structure 24 through the cavity air inlet pipeline 26, and the temperature of the air inlet heating grid 23 can be increased through the exhaust gas with higher temperature entering the cavity structure 24, so that the air inlet heating grid 23 cannot be frozen even if the engine runs in the low temperature environment. And the exhaust gas entering the cavity structure 24 is exhausted through the cavity exhaust pipe 29, specifically, referring to fig. 4, the cavity exhaust pipe 29 is directly connected to the gas purification apparatus 25, and at this time, the exhaust gas in the cavity structure 24 directly enters the gas purification apparatus 25 through the cavity exhaust pipe 29, and is exhausted after being purified by the gas purification apparatus 25. The exhaust gas remaining in the exhaust pipe 16 after the supercharger turbine is discharged to the gas purification device 25 through the third end of the exhaust pipe 27 after the supercharger turbine, and the exhaust gas is purified by the gas purification device 25 and discharged. The environment temperature critical threshold value can be set according to actual requirements; the first valve 28 may be a solenoid valve; the first end of the supercharger exhaust piping 27 is the head end of the supercharger exhaust piping 27, the third end of the supercharger exhaust piping 27 is the tail end of the supercharger exhaust piping 27, and the second end of the supercharger exhaust piping 27 is the position on the supercharger exhaust piping 27 near the head end.
In one implementation, to control the amount of intake air of the exhaust gas entering the cavity structure 24, the control system further includes: a first temperature sensor (not shown in the figure), wherein the first temperature sensor is arranged on the air inlet pipe and is positioned at the front end of the air inlet heating grid 23;
a first temperature sensor for detecting an intake air temperature value and transmitting the intake air temperature value to the controller 21;
the controller 21 is specifically configured to, when it is determined that the ambient temperature value is smaller than the ambient temperature critical threshold, obtain an intake air temperature value, determine a first opening value corresponding to the first valve 28 according to the intake air temperature value, and control the first valve 28 to open according to the first opening value.
In this embodiment, when the controller 21 determines that the ambient temperature value is smaller than the preset ambient temperature critical threshold, that is, when it is determined that the ambient temperature is in a low-temperature environment, the controller 21 may determine a first opening value corresponding to the first valve 28 according to the intake air temperature value, so that the controller 21 controls the first valve 28 to open according to the first opening value. Wherein, the higher the intake air temperature value is, the smaller the first opening value corresponding to the first valve 28 may be.
In one implementation, to more accurately control the amount of intake air of the exhaust gas entering the cavity structure 24, the controller 21 is further configured to obtain a current rotation speed and a current fuel injection amount of the engine in the vehicle when it is determined that the ambient temperature value is less than the ambient temperature threshold; determining a second opening value corresponding to the current rotating speed and the current oil injection quantity according to the corresponding relation among the preset rotating speed, the oil injection quantity and the second opening value;
the controller 21 is specifically configured to determine the first opening value according to the determined second opening value and a difference between the intake air temperature value and the intake air temperature set value.
In this embodiment, the controller 21 may further pre-store a corresponding relationship between the rotation speed, the fuel injection amount, and the second opening value, and after the controller 21 obtains the current rotation speed and the current fuel injection amount, the controller may determine the current second opening value corresponding to the current rotation speed and the current fuel injection amount based on the corresponding relationship. Next, in an example, the controller 21 may first control the first valve 28 to open according to the current second opening value, then the controller 21 obtains the intake air temperature value at the current time, and calculates a difference between the intake air temperature value and the intake air temperature set value (e.g. 5 ℃), if the difference is not zero, based on the difference and the current second opening value, determine the first opening value, for example, the current second opening value is 60%, the determined first opening value is 62%, that is, the opening of the first valve 28 is controlled to be adjusted to 62%, then the controller 21 continues to obtain the intake air temperature value at the current time, and continues to calculate the difference until the difference is zero, and the opening of the first valve is not adjusted, so as to achieve a closed loop.
The corresponding relation among the rotating speed, the fuel injection quantity and the second opening value is preset, then the current second opening value corresponding to the current rotating speed and the current fuel injection quantity is determined based on the corresponding relation, then the controller firstly controls the first valve to be opened according to the current second opening value, and then on the basis of the current second opening value, the opening of the first valve is continuously adjusted until a closed loop is reached based on the difference value between the air inlet temperature value and the air inlet temperature set value, so that the first valve can be quickly adjusted to the opening value required by the current scene.
In one implementation, to further control the intake air amount of the exhaust gas entering the cavity structure 24 more accurately, the controller 21 is specifically configured to determine the first opening value according to the determined second opening value, the ambient temperature value, and the difference between the intake air temperature value and the intake air temperature set value. In one example, the controller 21 is specifically configured to determine an environmental correction factor according to an environmental temperature value; determining a product of the environment correction coefficient and the determined second opening value as a third opening value; and determining the first opening value according to the third opening value and the difference value between the inlet air temperature value and the inlet air temperature set value.
In this embodiment, the controller 21 may further correct the preset second opening value based on the ambient temperature value, specifically, determine an ambient correction coefficient corresponding to the ambient temperature value based on the prior art, and then obtain a third opening value by multiplying the determined ambient correction coefficient by the determined second opening value. The controller 21 may first control the first valve 28 to open at the third opening value, and then continuously adjust the opening of the first valve based on the third opening value until the difference is zero based on the difference calculated each time.
The environment correction coefficient is determined according to the environment temperature value, the determined second opening value is corrected through the environment correction coefficient, then the controller firstly controls the first valve to be opened according to the third opening value obtained after correction, and then on the basis of the third opening value, the opening of the first valve is continuously adjusted based on the difference value between the inlet air temperature value and the inlet air temperature set value until the closed loop is achieved, so that the controller can further adjust the first valve to the opening value required by the current scene more quickly.
In one implementation, the system further comprises: a second temperature sensor (not shown in the figure), wherein the second temperature sensor is disposed outside the vehicle.
And a second temperature sensor for acquiring an ambient temperature value outside the vehicle and transmitting the ambient temperature value to the controller 21.
In the embodiment, the cavity exhaust pipeline is directly connected with the gas purification device, and the supercharger vortex exhaust pipeline is directly communicated with the gas purification device, so that the ventilating body purification device can purify the exhaust gas exhausted from the cavity exhaust pipeline and the supercharger vortex exhaust pipeline so as to cause environmental problems; meanwhile, the opening of the first valve can be controlled based on the air inlet temperature value by acquiring the air inlet temperature value, so that the air inlet amount of the waste gas entering the cavity structure is controlled.
Fig. 5 is a schematic structural diagram of a vehicle-based control system according to a second embodiment of the present application, and as shown in fig. 5, the system includes:
the air inlet heating grid 33 is arranged in the cavity structure 34, one end of the cavity structure 34 is connected with a first end of a supercharger vortex exhaust pipeline 37 through a cavity air inlet pipeline 36, a first valve 38 is arranged on the cavity air inlet pipeline 36, a second end of the supercharger vortex exhaust pipeline 37 is connected with the supercharger 32, a third end of the supercharger vortex exhaust pipeline 37 is communicated with the air purification device 35, the other end of the cavity structure 34 is connected with a cavity exhaust pipeline 39, one end of the cavity exhaust pipeline 39, far away from the cavity structure 34, is connected with a fourth end of the supercharger vortex exhaust pipeline 39, the distance from the second end to the first end is smaller than the distance from the fourth end to the first end, and a second valve 30 is arranged on the cavity exhaust pipeline 39.
The supercharger 32 is configured to push the turbine to do work by using exhaust gas discharged from the engine, and discharge the exhaust gas after pushing the turbine to do work into the supercharger exhaust pipe 27 after swirling.
And the controller 31 is used for acquiring an external environment temperature value and controlling the first valve 38 to be opened when the environment temperature value is determined to be smaller than a preset environment temperature critical threshold value, so that the exhaust gas in the exhaust pipeline 37 after the turbocharger is whirled enters the cavity structure 34.
The controller 31 is further configured to control the second valve 30 to open after controlling the first valve 38 to open, so that the exhaust gas entering the cavity structure 34 enters the supercharger vortex exhaust pipe 37 through an end of the cavity exhaust pipe 39 far from the cavity structure 34, and is discharged to the gas purification device 35 through a third end of the supercharger vortex exhaust pipe 37.
The remaining exhaust gas in the turbo exhaust line 37 is discharged to the gas purification apparatus 35 through the third end of the turbo exhaust line 37.
And a gas purification device 35 for performing purification treatment on the exhaust gas entering the gas purification device 35 and discharging the purified exhaust gas to the outside.
In the present embodiment, exhaust gas generated by combustion of oil and air in the engine cylinder is output to the supercharger 32, the exhaust gas pushes a turbine in the supercharger 32 to do work, and after pushing the turbine to do work, the supercharger 32 discharges the portion of exhaust gas into the supercharger exhaust pipe 37. The exhaust gas discharged into the supercharger turbo exhaust line 37 has a relatively high temperature.
The operating principle of the control system is then: the controller 31 obtains an ambient temperature value outside the vehicle, and then judges whether the ambient temperature value is less than a preset ambient temperature critical threshold value, if so, it is determined that the vehicle is currently in a low-temperature environment, so that the controller 31 controls the first valve 28 on the cavity air inlet pipeline 36 to be opened, thus, part of exhaust gas in the exhaust pipeline 27 after the supercharger whirlpool enters the cavity structure 34 through the cavity air inlet pipeline 36, and the temperature of the air inlet heating grid 23 can be increased through the exhaust gas with higher temperature entering the cavity structure 24, so that the air inlet heating grid 23 cannot be frozen even if the engine runs in the low-temperature environment. Furthermore, the controller 31 controls the second valve 30 to open after controlling the first valve 38 to open, so that the exhaust gas entering the cavity structure 24 is discharged to the supercharger exhaust line 37 through the cavity exhaust line 29. The exhaust gas in the exhaust pipe 37 after the supercharger turbine is discharged to the gas purification device 35 through the third end of the exhaust pipe 37 after the supercharger turbine, and the exhaust gas is purified by the gas purification device 35 and then discharged. The environment temperature critical threshold value can be set according to actual requirements; the first valve 38 and the second valve 30 may be solenoid valves; the first end of the exhaust pipe 37 after the supercharger vortex is the head end of the exhaust pipe 37 after the supercharger vortex, the third end of the exhaust pipe 37 after the supercharger vortex is the tail end of the exhaust pipe 37 after the supercharger vortex, the second end of the exhaust pipe 37 after the supercharger vortex is the position close to the head end of the exhaust pipe 37 after the supercharger vortex, and the fourth end of the exhaust pipe 37 after the supercharger vortex is the position close to the tail end of the exhaust pipe 37 after the supercharger vortex.
In this embodiment, the controller 31 may also determine the opening degree of the first valve 37 based on the ambient temperature value and/or the intake air temperature value. For the content of determining the opening degree of the first valve 37, reference may be made to the related explanations in the first embodiment and the second embodiment, and details thereof are not repeated here.
In this embodiment, the controller 31 may comprise an electronic control unit CEU, and may further comprise a sub-controller, wherein the ECU determines the opening degree of the first valve 37, and then sends the opening degree to the sub-controller, and the sub-controller controls the opening of the first valve 37. The gas purification device may specifically be an oxidation catalytic converter DOC that uses a precious metal such as Pt, Pd as a catalyst to mainly reduce the content of SOF in the emission, thereby reducing the PM emission.
In the embodiment, the cavity exhaust pipeline is indirectly connected with the gas purification device, namely the cavity exhaust pipeline is connected with the gas purification device through the supercharger vortex exhaust pipeline, and the supercharger vortex exhaust pipeline is directly communicated with the gas purification device, so that the exhaust gas exhausted from the supercharger vortex exhaust pipeline can be purified through the gas purification device, and the environmental problem is caused; meanwhile, the opening of the first valve can be controlled based on the air inlet temperature value by acquiring the air inlet temperature value, so that the air inlet amount of the waste gas entering the cavity structure is controlled. According to the air inlet heating grid, an additional heat source is not needed to be added, exhaust generated by the engine is introduced into the air inlet heating grid, the temperature of the air inlet heating grid is increased, and the problem that the air inlet heating grid is frozen is solved. Moreover, the device is simple in structure, safe, reliable, wide in application range and high in reliability.
Fig. 6 is a schematic structural diagram of a vehicle according to a fourth embodiment of the present application, and as shown in fig. 6, a vehicle 41 includes a vehicle-based control system 42 according to any one of the embodiments.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (10)
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