CN107826096A - Vehicle and its braking control system - Google Patents

Abstract

The invention discloses a kind of vehicle and its braking control system, the braking control system of the vehicle includes source of the gas, former garage's car brake valve, brake monitor, automatic traveling crane control valve group, shuttle valve and service brake air chamber；The automatic traveling crane control valve group includes motor, driving section and brake valve, and the driving section is connected between the output shaft of the motor and the brake valve, and the brake valve and former garage's car brake valve are connected with the shuttle valve respectively；The shuttle valve switches the connection between the service brake air chamber and the automatic traveling crane control valve and former garage's car brake valve according to the control valve of the automatic traveling crane control valve group and the air pressure size of former garage's car brake valve output.In the braking control system of vehicle provided by the invention, the automatic traveling crane control valve group uses machine driving, has the advantages of control accuracy is high, and stable gas pressure is good, and valve body reliability is high.

Description

Vehicle and its brake control system

technical field

The invention relates to the technical field of intelligent vehicles, in particular to a braking control system of a vehicle.

Background technique

The braking system of a large vehicle such as a commercial vehicle usually includes an automatic electronically controlled braking system and a parking braking system, both of which are mostly pneumatically or electropneumatically controlled independently of each other. Under normal circumstances, commercial vehicles such as heavy trucks are bulky (nearly 20m long, 3m wide, and nearly 3m high), weigh tens of tons, and the driver's control distance from the rear is nearly 20m. Due to inertia, conventional mechanical It is difficult for the plant operator to brake precisely.

With the rapid development of society, road transportation carries more and more transportation tasks. The development of automotive electronic technology, the simplification of automobile operation, and the reduction of accidents are effective means to improve traffic efficiency, especially in urban traffic. The car parking brake system integrates the car's short-term and long-term parking functions, and is an important system that requires frequent manipulation by the driver. After parking, the driver needs to manipulate the parking brake control mechanism to realize the parking brake; before driving, the driver must manually release the parking brake. If the driver is fatigued during driving or mishandled when starting and stopping, it will affect the safety of the car.

Chinese invention patent CN201410421560 provides an electronically controlled pneumatic braking system for vehicles, including a brake controller, a front axle proportional solenoid valve, a front axle shuttle valve, a rear axle proportional solenoid valve, a rear axle shuttle valve and a normally open two-position three-way Solenoid valve; the brake controller calculates the corresponding control amount according to the upper layer command, and changes the PWM duty cycle input to the front axle proportional solenoid valve and the rear axle proportional solenoid valve according to the control amount, thereby adjusting the front axle proportional solenoid valve. The valve and the rear axle proportional solenoid valve control the current, and the air pressure at the output port of the proportional solenoid valve is proportional to the air pressure at the input port of the proportional solenoid valve and the control current of the proportional solenoid valve. The brake controller adjusts the front axle proportional solenoid valve and the rear axle proportional solenoid valve to control the current, thereby controlling the pressure of the front axle service brake air chamber and the rear axle service brake air chamber, and then controlling the vehicle service brake strength.

The above-mentioned prior art realizes the automatic control function of the pneumatic control system, and the driver's braking and automatic braking can be switched at any time. However, large commercial vehicles usually have heavy weight, long braking distance and high-speed operation for a long time, so precise control of the braking system is required, and this scheme of using a proportional solenoid valve to adjust the current to control the pressure has a problem with the adjustment accuracy. Limitation and instability, as the air source pressure fluctuates and jitter occurs, there are potential safety hazards in the application of large commercial vehicle systems.

Therefore, it is necessary to provide a new vehicle braking control system to solve the above technical problems.

Contents of the invention

The main purpose of the present invention is to provide a vehicle and its braking control system, aiming to provide a vehicle braking control system with high control precision, good air pressure stability and high reliability of the valve body.

In order to achieve the above object, the present invention provides a brake control system for a vehicle, including an air source, an original vehicle service brake valve, a brake controller, an automatic service control valve assembly, a shuttle valve and a service brake air chamber;

The automatic driving control valve assembly includes a drive motor, a transmission part and a brake valve, the brake controller communicates with the drive motor, the input port of the brake valve is connected to the air source, and the transmission The part is connected between the output shaft of the drive motor and the brake valve, the output port of the brake valve is connected with the first input port of the shuttle valve, and the drive motor drives the transmission part to controlling the degree of opening and closing of the brake valve;

The input port of the original vehicle service brake valve is connected with the air source, and the output port of the original vehicle service brake valve is connected with the second input port of the shuttle valve;

The output port of the shuttle valve is connected with the service brake air chamber, so as to switch between the service brake air chamber and The connection between the automatic driving control valve and the driving brake valve of the original vehicle.

Optionally, the transmission part is a screw structure.

Optionally, the transmission accuracy of the screw structure is 0.01-0.1 mm.

Optionally, both the brake valve and the service brake valve of the original vehicle are dual-chamber brake valves of the same specification.

Optionally, the service brake air chamber includes at least one of a front axle service brake air chamber and a rear axle service brake air chamber.

Optionally, at least one pressure sensor is also included, wherein the input port of the brake valve, the input port of the original vehicle service brake valve, the output port of the brake valve and the original vehicle service brake valve At least one position of the output port is provided with the pressure sensor.

Optionally, an alarm device is also included, and the alarm device is communicatively connected with the brake controller; when the pressure sensor detects the input port of the brake valve and the input of the original vehicle service brake valve When at least one of the outlet port, the output port of the brake valve and the output port of the original vehicle service brake valve is in an abnormal air pressure range, the brake controller controls the alarm device to issue an alarm prompt.

Optionally, the brake controller is used to receive a corresponding control command, control the rotation of the driving motor, and control the degree of opening and closing of the brake valve, so as to connect or disconnect the service brake air chamber and the brake valve. The connection between the above-mentioned automatic driving control valve components.

In addition, in order to achieve the above object, the present invention also provides a vehicle, which has the brake control system of the vehicle according to any one of the preceding items.

Optionally, the vehicle is a large commercial vehicle.

In the technical solution of the present invention, an automatic driving control valve assembly is set, including a drive motor, a transmission part and a brake valve, the input port of the brake valve is connected to the air source, and the transmission part is connected to the drive The output shaft of the motor is connected to the brake valve, the output port of the brake valve is connected to the first input port of the shuttle valve, and the driving motor drives the transmission part to control the brake valve. Opening and closing degree: the pressure between the service brake air chamber and the automatic service control valve and the original vehicle service brake valve is switched by the air pressure output by the control valve and the original vehicle service brake valve The automatic driving control valve assembly adopts mechanical transmission, which has the advantages of high control precision, good air pressure stability, and high reliability of the valve body compared with solenoid valves and other control methods.

Description of drawings

Fig. 1 is a schematic structural diagram of a brake control system module of a vehicle in a first embodiment of the present invention;

FIG. 2 is a flowchart of a braking control system of a vehicle in a second embodiment of the present invention.

Explanation of reference numbers:

The realization of the purpose of the present invention, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that all directional indications (such as up, down, left, right, front, back, lateral, radial, horizontal, vertical...) in the embodiments of the present invention are only used to explain If the relative positional relationship, movement conditions, etc. between the various components shown in the figure below, if the specific posture changes, the directional indication will also change accordingly.

In addition, in the present invention, descriptions such as "first", "second" and so on are used for description purposes only, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise specified and limited, the terms "connection" and "fixation" should be understood in a broad sense, for example, "fixation" can be a fixed connection, a detachable connection, or an integral body; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be an internal communication between two elements or an interaction relationship between two elements, unless otherwise clearly defined. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In addition, the technical solutions of the various embodiments of the present invention can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered as a combination of technical solutions. Does not exist, nor is it within the scope of protection required by the present invention.

As shown in FIG. 1 , it is a schematic diagram of a module structure of a brake control system 100 for a vehicle in a first embodiment of the present invention.

The brake control system 100 of the vehicle includes an air source 10 , an original vehicle service brake valve 20 , a brake controller 30 , an automatic service control valve assembly 22 , a shuttle valve 40 and a service brake air chamber 50 .

Wherein, the automatic driving control valve assembly 22 includes a drive motor 221, a transmission part 222 and a brake valve 223, the brake controller 30 is connected to the drive motor 221 in communication, and the input port of the brake valve 223 is connected to The air source 10 is connected, the transmission part 22 is connected to the output shaft of the drive motor 221 and connected to the brake valve 223, and the output port of the brake valve 223 is connected to the first input of the shuttle valve 40. (not shown in the figure), and the drive motor 221 drives the transmission part 222 to control the degree of opening and closing of the brake valve 223 .

The input port of the original vehicle service brake valve 20 is connected with the air source 10, and the output port of the original vehicle service brake valve 20 is connected with the second input port (not shown) of the shuttle valve 40 ;

The output port of the shuttle valve 40 is connected with the service brake air chamber 50, so as to switch the service brake according to the air pressure outputted by the control valve 223 of the automatic service control valve assembly 22 and the service brake valve 20 of the original vehicle. The connection between the brake air chamber 50 and the control valve 223 and the original vehicle service brake valve 20 .

Wherein, the brake controller 30 is communicatively connected with the driving motor 221 of the automatic driving control valve assembly 22, and the driving motor 221 rotates under the control of the brake controller 30, thereby driving the transmission part 222 to push the The brake valve 223 is used to control the degree of opening and closing of the brake valve 223; the control valve 223 and the original vehicle service brake valve 20 are integrated into the service brake air chamber 50 through the shuttle valve 40 The shuttle valve 40 selects the braking mode by comparing the pressure of the output air pressure of the control valve 223 and the original vehicle service brake valve 20.

Specifically, when the driver's manual mode is selected, the brake controller 30 controls the drive motor 221 to cut off the power, the air pressure output by the shuttle valve 40 is the air pressure of the original vehicle service brake valve 20, and the driver can use the parking brake foot brake/brake The original vehicle braking devices such as moving pedals perform braking; when the automatic braking mode is selected, the upper layer of the vehicle sends an automatic control command to the braking controller 30, and the braking controller 30 controls the driving motor 221 to work, and the driving motor 221 drives the transmission The part 222 pushes the brake valve 223, so that the air pressure output by the shuttle valve 40 is the air pressure output by the brake valve 223 of the automatic driving control valve assembly 22. Further, when the driver needs emergency intervention in the automatic driving mode, the driver urgently steps on the brake pedal so that the air pressure output by the original vehicle service brake valve 20 is greater than the braking pressure of the automatic service control valve assembly 22. The air pressure of the valve 223 and the air pressure output by the shuttle valve 40 are switched to the air pressure of the service brake valve 40 of the original vehicle, thereby switching between manual and automatic modes, and realizing the driver's emergency intervention function to ensure driving safety.

In the technical solution of the present invention, an automatic driving control valve assembly 22 is provided, including a drive motor 221, a transmission part 22, and a brake valve 223. The input port of the brake valve 223 is connected to the air source 10, and the transmission The part 222 is connected to the output shaft of the drive motor 221 and connected to the brake valve 223, the output port of the brake valve 223 is connected to the first input port of the shuttle valve 40, and the drive motor 221 drives the The transmission part 222 is used to control the opening and closing degree of the brake valve 223; the air pressure outputted by the control valve 223 and the original vehicle service brake valve 20 is used to switch the service brake air chamber 50 and the service brake chamber 50. The connection between the automatic driving control valve assembly 22 and the original vehicle driving brake valve 20, the automatic driving control valve assembly 22 adopts mechanical transmission, compared with control methods such as solenoid valves, it has good air pressure stability, and the valve advantages of high reliability.

Further, the transmission part 222 may be a screw structure, and the transmission precision of the screw structure is 0.01-0.1 mm. Preferably, the transmission accuracy is 0.01-0.03 mm.

Specifically, when the brake controller 30 controls the drive motor 221 to work, the drive motor 221 drives the screw to push the brake valve 223, so that the air pressure output by the shuttle valve 40 is the air pressure output by the brake valve 223 of the automatic driving control valve assembly 22. .

In this embodiment, the screw drive structure is adopted, which has the advantages of high transmission precision, stable and reliable mechanical control structure, and can be applied to large-scale load vehicles.

It can be understood that, in other embodiments, the structure of the transmission part 22 is not limited to the screw rod, as long as it can convert the rotation of the drive motor 221 into a linear motion and push the brake valve 223 to open and close. Yes, there is no specific limitation here.

Further, in one embodiment, the brake valve 223 and the service brake valve 20 of the original vehicle both adopt dual-chamber brake valves of the same specification.

Preferably, the dual-chamber brake valve has the same brake valve structure as the original vehicle.

Both the brake valve 223 and the original vehicle service brake valve 20 are double-cavity brake valves with the same specifications, and have the same air circuit structure, which can further improve the shuttle valve 40 to the control valve 223 and the original vehicle service. The pressure of the output air pressure of the brake valve 20 is compared for accuracy and sensitivity; meanwhile, the pressure of the double-chamber brake valve is controlled by the principle of spring-air pressure balance, which can quickly reach a stable air pressure value. Proportional valves have the advantages of adapting to air pressure fluctuations, fast response, and fast deflation; Good performance, durability and high reliability.

Please refer to FIG. 2 together, further, the service brake air chamber 50 includes at least one of a front axle service brake air chamber and a rear axle service brake air chamber. It can be understood that, for vehicles with different drive types, the structure of the service brake air chamber 50 includes a front axle service brake air chamber and a rear axle service brake air chamber.

Optionally, the brake control system 100 of the vehicle further includes at least one pressure sensor 60, wherein the input port of the brake valve 223, the input port of the original vehicle service brake valve 20, the brake valve The output port of 223 and at least one position of the output port of the original vehicle service brake valve 20 is provided with the pressure sensor.

The brake control system 100 of the vehicle also includes an alarm device 70, which is communicatively connected with the brake controller 30; the pressure sensor 60 detects that the input port of the brake valve 223, When at least one of the input port of the original vehicle service brake valve 20, the output port of the brake valve 223, and the output port of the original vehicle service brake valve 20 is in an abnormal air pressure range, the brake The automatic controller 30 controls the alarm device 70 to issue an alarm prompt.

In this embodiment, the pressure sensor 60 is provided at the input point and the pressure output point of the air source 10 of the brake control system 100 of the vehicle, which can monitor the pipeline air pressure at any time, and the alarm device can also be used to detect abnormal conditions. 70 alarm prompts.

It can be understood that the brake controller 30 is used to receive corresponding control commands and control the rotation of the driving motor 221 to control the degree of opening and closing of the brake valve 223, thereby connecting or disconnecting the driving brake. The connection between the pneumatic chamber 50 and the automatic driving control valve assembly 22 . It can be understood that the control command may be an upper layer command from the vehicle, such as a command received remotely, a control command issued by the intelligent control system according to the road conditions, or a control command sent by the intelligent control system according to the speed limit information obtained by the navigation device, etc. .

The present invention also provides a vehicle, the vehicle has the brake control system of the vehicle according to any one of the foregoing embodiments. Preferably, the vehicle is a large commercial vehicle or a heavy duty vehicle.

It can be understood that, in the description of this specification, references to the terms "an embodiment", "another embodiment", "other embodiments", or "the first embodiment to the Nth embodiment" mean that A specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

It should be noted that, as used herein, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or system comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or system. Without further limitations, an element defined by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article or system comprising that element.

The preferred embodiments of the present invention do not limit the patent scope of the present invention. Under the conception of the present invention, the equivalent structural transformation made by using the description of the present invention and the contents of the accompanying drawings, or directly/indirectly used in other related technical fields All are included in the scope of patent protection of the present invention.

Claims (10)

1. A braking control system for a vehicle, characterized in that it comprises an air source, an original vehicle service brake valve, a brake controller, an automatic service control valve assembly, a shuttle valve and a service brake air chamber; The automatic driving control valve assembly includes a drive motor, a transmission part and a brake valve, the brake controller communicates with the drive motor, the input port of the brake valve is connected to the air source, and the transmission The part is connected between the output shaft of the drive motor and the brake valve, the output port of the brake valve is connected with the first input port of the shuttle valve, and the drive motor drives the transmission part to controlling the degree of opening and closing of the brake valve; The input port of the original vehicle service brake valve is connected with the air source, and the output port of the original vehicle service brake valve is connected with the second input port of the shuttle valve; The output port of the shuttle valve is connected with the service brake air chamber, so as to switch between the service brake air chamber and The connection between the automatic driving control valve and the driving brake valve of the original vehicle. 2 . The brake control system for a vehicle according to claim 1 , wherein the transmission part is a screw structure. 3 . 3 . The brake control system for a vehicle according to claim 2 , wherein the transmission accuracy of the screw structure is 0.01-0.1 mm. 4 . 4. The brake control system for a vehicle according to claim 1, wherein the brake valve and the service brake valve of the original vehicle are double-cavity brake valves of the same specification. 5 . The brake control system of a vehicle according to claim 1 , wherein the service brake air chamber comprises at least one of a front axle service brake air chamber and a rear axle service brake air chamber. 6. The vehicle brake control system according to claim 1, further comprising at least one pressure sensor, wherein the input port of the brake valve, the input port of the original vehicle service brake valve, the At least one position of the output port of the brake valve and the output port of the original vehicle service brake valve is provided with the pressure sensor. 7. The brake control system of the vehicle according to claim 6, further comprising an alarm device, the alarm device is connected to the brake controller in communication; when the pressure sensor detects that the brake controller When at least one of the input port of the dynamic valve, the input port of the original vehicle service brake valve, the output port of the said brake valve and the output port of the original vehicle service brake valve is in the abnormal air pressure range, The brake controller controls the alarm device to issue an alarm prompt. 8. The vehicle brake control system according to any one of claims 1-7, wherein the brake controller is used to receive a corresponding control command and control the rotation of the drive motor to control the The degree of opening and closing of the brake valve, thereby connecting or disconnecting the connection between the service brake air chamber and the automatic service control valve assembly. 9. A vehicle, characterized by having a brake control system for a vehicle according to any one of claims 1-8. 10. The vehicle of claim 9, wherein the vehicle is a large commercial vehicle.