CN204355026U - A kind of automatic parking system based on pneumatic brake - Google Patents

Abstract

The utility model relates to an automatic parking system based on air brakes. The system includes a hand brake air chamber, a hand brake air storage cylinder, an ECU controller, an air path control assembly and a mode conversion control assembly; the hand brake air chamber passes through the air pipe and the air path The control assembly is connected; the input end of the ECU controller is connected with the conventional circuit of the car or the CAN bus module, and receives the engine speed signal, mileage signal, throttle signal and gear signal; the output end of the ECU controller is controlled by the wire harness and the air circuit respectively. The assembly is connected with the mode conversion control assembly; the air circuit control assembly is connected with the ECU controller through the wire harness, and the air circuit control assembly is respectively connected with the hand brake chamber and the hand brake air storage tank through the air pipe; the mode conversion control assembly It is connected with the air circuit control assembly through the air pipe. Making these actions automatic and intelligent effectively improves the automatic control level of the whole vehicle and greatly improves the safety of driving and parking.

Description

An automatic parking system based on air brake

technical field

The utility model relates to an automatic parking system based on an air brake, which belongs to the technical field of automobile parking brakes.

Background technique

Now on the market, cars that use brake fluid as the brake medium, such as cars and small station wagons, use complex electronic control methods to realize the application of automatic parking function (AUTOHOLD) and electronic handbrake (EPB) functions. Most of them The integrated front and rear wheel brake calipers are controlled by the on-board computer or the relevant components of the advanced ESP (Electronic Stability System) are executed. The cost of parts is very high, so this function is generally only configured in high-end cars with high prices. superior. The vehicles that use high-pressure air as the braking medium are mainly large and medium-sized passenger cars and trucks, and because the working principle and control method of the brakes are basically different from those of cars, the components of the brake system and hand brake system are even more different from those of cars. Basically, no relevant on-board computer will be configured, and the majority of drivers want to enjoy the same convenience as cars. The requirements are equally strong. At the same time, as the domestic economic conditions are getting better and better, the demand for passenger cars and trucks is increasing significantly every year. There are more and more passenger and cargo vehicles on the road, and transportation safety is becoming more and more important. How to simplify the manual operation to realize the intelligentization and automation of the vehicle, greatly simplify the labor intensity of the driver, and improve the safety at the same time has become the main direction of advanced passenger and truck research. Under the circumstances, the driver needs to take the tedious and intensive action of braking or parking, simplifying the complexity, automating the main action of braking, and realizing intelligent control by the ECU, reducing the driver's work intensity while ensuring the safety of the car. For example, when driving a vehicle to stop at a red light at an intersection, the driver should stop on the brake pedal or pull up the handbrake; Drivers are labor-intensive, prone to fatigue, and easy to cause safety hazards. Especially when bus drivers are operating in cities with increasingly serious traffic jams, if they are not handled properly, they are likely to cause traffic safety accidents.

Utility model content

The technical problem to be solved by the utility model is, in order to solve the above problems, an automatic parking system based on air brakes is provided that reduces driving intensity, improves safety level, and has a high degree of automation for vehicles that use high-pressure air as a brake air source, such as passenger cars and trucks. car system.

The technical solution of the utility model to solve the above-mentioned technical problems is as follows: an automatic parking system based on air brakes, including a hand brake air chamber, a hand brake air storage tank, an ECU controller connected to the vehicle power supply, an air circuit control assembly and a mode conversion control assembly;

The hand brake air chamber is connected to the air circuit control assembly through the air pipe;

The input end of the ECU controller is connected with the automobile conventional circuit or the CAN bus module, and receives the engine speed signal, the mileage signal, the throttle signal and the gear signal; Connected with the mode conversion control assembly;

The air circuit control assembly is connected to the ECU controller through a wire harness, and the air circuit control assembly is respectively connected to the handbrake air chamber and the handbrake air storage tank through the air pipe;

The mode conversion control assembly is connected with the air circuit control assembly through the air pipe.

The beneficial effects of the utility model are: the utility model automatically and completely according to the working principle of the car, according to the working mode selected by the driver, and the ECU automatically locks and unlocks the vehicle when various working conditions are met according to the program. , and inform the driver of the working status through the working indicator light, which is in line with the trend of the car becoming more and more intelligent for innovation, effectively reducing the driver's work intensity, and at the same time improving the safety during driving; the utility model can real-time The working logic set by the ECU is used to self-check and monitor the working status of the air circuit control system assembly and give an alarm to abnormal working conditions, and inform the type and cause of the failure through the working mode indicator light in the form of a fault code flashing light. Before being excluded, the system will automatically convert the working mode to the manual mode; the utility model has a high level of intelligence and safety, and has the ability to upgrade software and expand functions; the device described in the utility model automates these actions, It is intelligent and effectively improves the automatic control level of the whole vehicle, and at the same time reduces the driver's work intensity, which greatly improves the safety of driving and parking.

On the basis of the above technical solutions, the utility model can also be improved as follows.

Further, the air circuit control assembly includes a dual-control two-position solenoid valve and two coils respectively arranged at both ends of the double-control two-position solenoid valve. The air intake port of the dual-control two-position solenoid valve is connected to the handbrake air reservoir and the mode conversion control assembly through the air pipe respectively; the exhaust port of the double-control two-position solenoid valve is connected to the muffler;

The two coils are respectively connected to the output ends of the ECU controller through the wire harness.

Further, the dual-control two-position solenoid valve adopts a dual-control two-position three-way solenoid valve.

Further, the air circuit control assembly includes a first double-control two-position solenoid valve, a second double-control two-position solenoid valve and four coils arranged side by side, the first double-control two-position solenoid valve and the second double-control two-position solenoid valve The air inlet interface of the two-position solenoid valve is connected with the air pipe and then respectively connected with the handbrake air reservoir and the mode conversion control assembly through the air pipe; The exhaust port of the valve is connected; the exhaust port of the first double-control two-position solenoid valve is connected to the muffler; the air outlet port of the second double-control two-position solenoid valve is connected to the handbrake air chamber through the air pipe;

A coil is respectively arranged on the left and right sides of the first double-control two-position solenoid valve; a coil is respectively arranged on the left and right sides of the second double-control two-position solenoid valve; The output is connected.

Further, the first dual-control 2-position solenoid valve and the second dual-control 2-position solenoid valve adopt a dual-control 2-position 3-way solenoid valve or a dual-control 2-position 5-way solenoid valve;

The pressure port of the dual-control two-position five-way solenoid valve is provided with a pressure sensor, and the pressure sensor is connected to the output end of the ECU controller through a wire harness.

Further, the mode switching control assembly includes two self-resetting switches; the two self-resetting switches are respectively connected to the output terminals of the ECU controller through wire harnesses.

Further, the mode switching control assembly also includes a manual valve respectively provided with an air outlet port, an air inlet port and an exhaust port; the exhaust port of the manual valve is connected to the muffler; the air inlet port of the manual valve is connected to the The air circuit control assembly is connected through an air pipe; the air outlet port of the manual valve is connected with the air circuit control assembly through an air pipe.

Further, the mode conversion control assembly also includes a working mode indicator light and a working status indicator light; the working mode indicator light is used to display the working mode and alarm; the working status indicator light is used to display the working state.

The beneficial effect of adopting the above further solution is that the operator can intuitively view the working mode and working state of the automatic parking system through the working mode indicator light and the working state indicator light, and deal with it in time when an alarm occurs.

Description of drawings

Fig. 1 is the structural diagram of a kind of automatic parking system based on air brake described in specific embodiment 1 and 2 of the utility model;

Fig. 2 is a partially enlarged view of an automatic parking system based on an air brake described in Embodiment 1 of the utility model;

Fig. 3 is a partially enlarged view of an automatic parking system based on an air brake described in Embodiment 2 of the utility model;

Fig. 4 is a structural diagram of an automatic parking system based on an air brake described in Embodiment 3 of the present invention;

FIG. 5 is a partially enlarged view of an air brake-based automatic parking system described in Embodiment 3 of the present invention.

In the accompanying drawings, the list of parts represented by each label is as follows:

1. Handbrake air chamber, 2. Handbrake air reservoir, 3. ECU controller, 4. Air circuit control assembly, 5. Mode conversion control assembly, 6. Pressure sensor, 7. Muffler, 41. First dual control Two-position five-way solenoid valve, 42, the second double-control two-position five-way solenoid valve, 43, coil, 44, the first double-control two-position three-way solenoid valve, 45, the second double-control two-position three-way solenoid valve, 46. The third double-control two-position three-way electromagnetic valve, 51a, the first self-resetting switch, 51b, the second self-resetting switch, 52, the manual valve.

Detailed ways

The principles and features of the present utility model are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the utility model, and are not used to limit the scope of the utility model.

As shown in Figure 1, it is a kind of automatic parking system based on air brake described in the specific embodiment 1 of the utility model, comprising a hand brake air chamber 1, a hand brake air storage tank 2, an ECU controller 3 connected to the vehicle power supply, Air circuit control assembly 4 and mode conversion control assembly 5;

The hand brake air chamber 1 is connected with the air circuit control assembly 4 through the air pipe;

The input terminal of the ECU controller 3 is connected with the conventional automobile circuit or the CAN bus module, and receives the engine speed signal, the mileage signal, the throttle signal and the gear signal; The assembly 4 is connected with the mode conversion control assembly 5;

The air circuit control assembly 4 is connected to the ECU controller 3 through a wire harness, and the air circuit control assembly 4 is respectively connected to the handbrake air chamber 1 and the handbrake air storage tank 2 through air pipes;

The mode conversion control assembly 5 is connected with the air circuit control assembly 4 through the air pipe.

As shown in Figure 2, the mode conversion control assembly 5 includes a first self-resetting switch 51a and a second self-resetting switch 51b connected to the output interface of the ECU controller 3, the first self-resetting switch 51a and the second self-resetting switch 51a The panel of two self-reset switches 51b is respectively provided with working status indicator light and working mode indicator light;

The air circuit control assembly 4 includes a first dual-control two-position five-way solenoid valve 41, a second double-control two-position five-way solenoid valve 42 and four coils; the mode conversion control assembly 5 also includes a manual valve 52 , the manual valve 52 is respectively provided with an air outlet port A3, an air inlet port P3 and an exhaust port R3, and the exhaust port R3 is connected with a muffler 7, and the air inlet port P3 and the handbrake air storage tank 2 pass through a trachea connected;

The two coils 43 on the left and right sides of the first dual-control two-position five-way solenoid valve 41 and the two coils 43 on the left and right sides of the second double-control two-position five-way solenoid valve 42 are respectively connected to the ECU controller. 3 The output interface is connected through a wire harness, the air inlet port P1 of the first dual-control 2-position 5-way solenoid valve 41 is connected to the handbrake air storage tank 2 through a gas pipe, and the first dual-control 2-position 5-way solenoid valve 41 The air outlet port A1 of the second dual-control two-position five-way solenoid valve 42 is connected through the air pipe, and the air outlet port A2 and exhaust port R2 of the second double-control two-position five-way solenoid valve 42 are respectively passed through the air pipe It is connected with the air outlet port A3 of the hand brake chamber 1 and the manual valve 52, the pressure port B1 of the first dual-control two-position five-way solenoid valve 41 is provided with a pressure sensor 6, and the second dual-control two-position The pressure interface B2 of the five-position solenoid valve 42 is provided with a pressure sensor 6, and the remaining interfaces of the first dual-control two-position five-way solenoid valve 41 and the second double-control two-position five-way solenoid valve 42 are provided with a muffler 7;

The mode conversion control assembly 5 is also provided with a fault display lamp, and the pressure sensor 6 and the fault display lamp are connected to the output interface of the ECU controller through a wire harness.

The control method during the application of a kind of automatic parking system based on air brake described in specific embodiment 1 is as follows:

(1) When the panel working mode indicators on the first self-resetting switch 51a and the second self-resetting switch 51b are always on, it is in the fully automatic mode, and the system functions as automatic parking and electronic handbrake.

Automatic parking function: when the ECU controller 3 in the system detects that the engine is working, the gear is in neutral, the accelerator is fully released, and when the vehicle speed is zero, it will trigger the left side of the second dual-control two-position five-way solenoid valve 42. When the side coil 43 is energized, the hand brake chamber 1 communicates with the air outlet port A2 of the second dual-control two-position five-way solenoid valve 42, and the air outlet port A2 of the second double-control two-position five-way solenoid valve 42 communicates with the air intake port P2. The air outlet port A1 of a double-control two-position five-way solenoid valve 41 is connected to the exhaust port R2 of the second double-control two-position five-way solenoid valve 42, and the right coil of the first double-control two-position five-way solenoid valve 41 is energized to make The air outlet port A1 communicates with the exhaust port R1. Since the exhaust port R1 is directly connected to the atmosphere through the muffler, the high-pressure air in the handbrake air chamber is emptied, and the handbrake works. The direction of the air path is: handbrake air chamber——A2——P2—— A1——R1 (open to the atmosphere), this function is aimed at the car. For example, when waiting for the red light of the traffic signal light, the working status indicator will light up. When the working conditions are met, the system ECU controller will send the corresponding two dual-control two The signal of the five-way solenoid valve makes the handbrake work.

When the conditions are not met, the ECU controller energizes the left coil 43 of the second dual-control 2-position 5-way solenoid valve 42 and the left coil 43 of the first dual-control 2-position 5-way solenoid valve 41, and the handbrake does not work. The air path passes through P1——A1——P2——A2—handbrake air chamber to make the handbrake invalid. The pressure sensor 6 detects the air pressure signal and feeds it back to the ECU controller to check whether the system is working normally. If the pressure sensor 6 detects an abnormal working state, after the signal is fed back to the ECU controller, the ECU controller (intelligent control assembly) will make the working mode indicator light on the self-resetting switch panel flash at different frequencies to output the fault code, The driver will recognize different flash code forms to know different fault causes.

Electronic handbrake: When the engine is turned off, the ECU controller (intelligent control assembly) in the system receives a corresponding electronic signal, triggers the left coil 43 of the second dual-control two-position five-way solenoid valve 42 to be energized, and the handbrake air chamber 1 It communicates with the air outlet port A2 of the second double-control two-position five-way solenoid valve 42, and the air outlet port A2 of the second double-control two-position five-way solenoid valve 42 communicates with the air inlet port P2; the first double-control two-position five-way solenoid valve The inlet port A1 of 41 is connected with the inlet port P2, and the right coil of the first dual-control two-position five-way solenoid valve 41 is energized so that the outlet port A1 is connected with the exhaust port R1, because the exhaust port R1 is directly connected to the muffler Atmosphere, empty the high-pressure air in the handbrake chamber 1, the handbrake works, and the direction of the air path is: handbrake chamber——A2——P2——A1——R1 (open to the atmosphere). This function is aimed at automatically enabling the handbrake to work after the car is parked and turned off. When the working conditions are met, the system ECU sends signals to the corresponding two dual-control 2-position 5-way solenoid valves through the wire harness to make the handbrake work;

When the conditions are not met, the ECU controller 3 energizes the left coil of the second dual-control 2-position 5-way solenoid valve 42 and the left coil of the first dual-control 2-position 5-way solenoid valve 41, the handbrake does not work, and the gas The road passes through P1——A1——P2——A2—handbrake air chamber, making the handbrake invalid. The pressure sensor 6 detects the air pressure signal and feeds it back to the ECU controller 3 to check whether the system works normally. If the pressure sensor 6 detects that the working state is abnormal, after the signal is fed back to the ECU controller 3, the ECU controller 3 will make the working mode indicator light on the self-resetting switch panel flash at different frequencies to output the fault code, and the driver will recognize Different flash code forms can tell different fault causes.

(2) The working mode indicator light on the panel of the first self-resetting switch 51a is not on, and when the working mode indicator light on the panel of the second self-resetting switch 51b is always on, it is in the electronic handbrake mode, and the system is an electronic handbrake Function,

Electronic handbrake: When the engine is turned off, the ECU controller 3 in the system receives a corresponding electronic signal, triggers the left coil of the second dual-control two-position five-way solenoid valve 42 to be energized, and the handbrake chamber 1 and the second dual-control two The air outlet port A2 of the five-position solenoid valve 42 is connected, and the air outlet port A2 of the second double-control two-position five-way solenoid valve 42 is connected with the air inlet port P2; the air outlet port A1 of the first double-control two-position five-way solenoid valve 41 and The inlet port P2 of the second double-control two-position five-way solenoid valve 42 is connected, and the right coil of the first double-control two-position five-way solenoid valve 41 is energized so that the air outlet port A1 communicates with the exhaust port R1, because the exhaust port R1 The external muffler is directly connected to the atmosphere, and the high-pressure air in the handbrake air chamber is emptied, the handbrake works, and the direction of the air path is: handbrake air chamber——A2——P2——A1——R1 (to the atmosphere). This function is aimed at automatically making the handbrake work after the car is parked and turned off. When the working conditions are met, the system ECU controller 3 sends the corresponding first dual-control two-position five-way solenoid valve 41 and the first dual-control two-position five-way solenoid valve 41 through the wire harness. Through the solenoid valve 42 signal, the handbrake is activated. When the conditions are not met, the ECU controller 3 energizes the left coil of the second dual-control two-position five-way solenoid valve 42 and the left coil of the first double-control two-position five-way solenoid valve 41, and the handbrake does not work. The air path passes through P1——A1——P2——A2—handbrake air chamber to make the handbrake invalid. The pressure sensor 6 detects the air pressure signal and feeds it back to the ECU controller to check whether the system is working normally.

(3) When the working mode indicator lights on the first self-resetting switch 51a and the second self-resetting switch 51b are not on, they are in manual mode,

This system can only make the whole vehicle be in the parking and handbrake release states with the handbrake acting and parking by the original position and the extended position of the handle of the manual valve 52 . In this state, the intelligent control assembly energizes the right coil of the second dual-control 2-position 5-way solenoid valve 42, and the high-pressure gas in the handbrake chamber 1 connects with the second dual-control 2-position 5-way solenoid valve 42 through the gas pipeline and joints. The air outlet port A2 is connected to the air outlet port A2, which is connected to the exhaust port R2 and leads to the air outlet port A3 of the manual valve 52. The handle of the manual valve 52 has two positions. When it is in the original position, the air outlet port A3 is connected to the exhaust port R3. , the exhaust port R3 is directly connected to the atmosphere through the muffler, the gas on the entire pipeline is depressurized, the handbrake works, and the direction of the gas path is: handbrake chamber——A2——R2——A3——R3 (to the atmosphere);

When the handle is stretched out, the inlet port P3 of the manual valve 52 communicates with the outlet port A3, the entire pipeline and the hand brake air chamber of the rear sub-pump are filled with high-pressure gas, the hand brake is released, and the direction of the gas path is: hand brake storage High-pressure gas of the gas tank——P3——A3——R2——A2—handbrake air chamber.

As shown in Figure 1 and Figure 3, it is a kind of automatic parking system based on air brake described in the specific embodiment 2 of the utility model, including hand brake air chamber 1, hand brake air storage tank 2, and the ECU control system connected with the vehicle power supply Device 3, air circuit control assembly 4 and mode conversion control assembly 5;

The input interface of the ECU controller 3 is connected to the engine speed signal, the mileage signal, the throttle signal and the gear signal through the conventional automobile circuit or the CAN bus module;

The mode switching control assembly 5 includes a first self-resetting switch 51a and a second self-resetting switch 51b connected to the output interface of the ECU controller 3 through a wire harness, and the first self-resetting switch 51a and the second self-resetting switch 51b There are working status indicator lights and working mode indicator lights on the panel respectively;

The air circuit control assembly 4 includes a first dual-control two-position three-way solenoid valve 44 and a second double-control two-position three-way solenoid valve 45, and the left and right sides of the first double-control two-position three-way solenoid valve 44 A coil 43 and a coil 43 are respectively provided on the left and right sides of the second dual-control two-position three-way electromagnetic valve 45; the coil 43 is respectively connected to the output interface of the ECU controller 3 through a wire harness. The air inlet port P1 of the first dual-control two-position three-way solenoid valve 44 is connected to the handbrake air storage tank 2 through a gas pipe, and the air outlet port A1 of the first double-control two-position three-way solenoid valve 44 is connected to the second dual-control two-position The inlet port P2 of the one-position three-way solenoid valve 45 is connected through a gas pipe, and the air outlet port A2 and exhaust port R2 of the second dual-control two-position three-way solenoid valve 45 are respectively connected to the hand brake chamber 1 and the The air outlet interface A3 of the manual valve 52 is connected, and the exhaust interface R1 of the first dual-control two-position three-way solenoid valve 44 is provided with a muffler 7;

The mode conversion control assembly 5 also includes a manual valve 52, the manual valve 52 is respectively provided with an air outlet port A3, an air inlet port P3 and an exhaust port R3, and the exhaust port R3 is connected with a muffler 7, the The air inlet port P3 is connected to the handbrake air storage tank 2 through a gas pipe;

The mode switching control assembly 5 is also provided with a fault display lamp, and the pressure sensor 6 and the fault display lamp are connected to the output interface of the ECU controller 3 through a wire harness.

A kind of control method based on the automatic parking system of air brake described in specific embodiment 2:

(1) When the panel working mode indicator lights on the first self-resetting switch 51a and the second self-resetting switch 51b are always on, they are in fully automatic mode, and the system plays the functions of automatic parking and electronic handbrake;

Automatic parking function: when the ECU controller 3 in the system receives the electronic signal when the engine is working, the gear is neutral, the accelerator is fully released, and the vehicle speed is zero, it triggers the left side of the second dual-control two-position three-way solenoid valve 45. The side coil 43 is energized, and the high-pressure gas in the hand brake chamber 1 communicates with the gas outlet port A2 of the second dual-control two-position three-way solenoid valve 45, and the gas outlet port A2 of the second double-control two-position three-way solenoid valve 45 communicates with the second dual-control two-position three-way solenoid valve 45. The inlet port P2 of the two-position three-way solenoid valve 45 is connected, the outlet port A1 of the first double-control two-position three-way solenoid valve 44 is connected to the air inlet port P2, and the right side of the first double-control two-position three-way solenoid valve 44 is connected. The side coil 43 is energized so that the air outlet port A1 communicates with the exhaust port R1. Since the exhaust port R1 is connected to an external muffler directly to the atmosphere, the high-pressure air in the handbrake chamber is emptied, and the handbrake works. The direction of the air path is: handbrake chamber——A2 ——P2——A1——R1 (through the atmosphere). This function is aimed at the working state of the car waiting for the traffic signal light, the indicator light will be on, and when the working conditions are met, the system will send the corresponding two double-control two-position three-way solenoid valve signals through the wire harness to make the handbrake work;

When not meeting the conditions, the ECU energizes the left side coil 43 of the second double-control two-position three-way solenoid valve 45 and the left side coil 43 of the first double-control two-position three-way solenoid valve 44, and the handbrake does not work. The direction of the air path is: the high-pressure air in the handbrake air tank----P1-A1-P2---A2-handbrake air chamber, which makes the handbrake invalid.

Electronic handbrake: When the engine is turned off, the ECU controller 3 in the system receives the corresponding electronic signal, triggers the left coil 43 of the second dual-control two-position three-way solenoid valve 45 to be energized, and the high-pressure gas in the air chamber of the rear sub-pump handbrake It communicates with the air outlet port A2 of the second double-control two-position three-way solenoid valve 45, and the air outlet port A2 of the second double-control two-position three-way solenoid valve 45 is connected with the air inlet port P2 of the second double-control two-position three-way solenoid valve 45 The air inlet port A1 of the first dual-control two-position three-way solenoid valve 44 communicates with the air inlet port P2, and the right coil of the first double-control two-position three-way solenoid valve 44 is energized so that the air outlet port A1 is connected to the exhaust port R1 is connected, because the exhaust port R1 is directly connected to the atmosphere with an external muffler, the high-pressure air in the handbrake chamber is emptied, the handbrake works, and the direction of the air path is: handbrake chamber——A2——P2——A1——R1 (to the atmosphere ). This function is aimed at automatically making the handbrake work after the car is parked and turned off. When the working conditions are met, the system ECU controller 3 energizes the corresponding two double-control two-position three-way solenoid valves through the wire harness to make the handbrake work. When the conditions are not met, the ECU energizes the left coil 43 of the second dual-control two-position three-way solenoid valve 45 and the left coil 43 of the first dual-control two-position three-way solenoid valve 44, the handbrake does not work, and the air circuit Through P1——A1——P2——A2—handbrake air chamber, the handbrake is disabled.

(2) The working mode indicator light on the panel of the first self-resetting switch 51a is off, and when the working status indicator light on the panel of the second self-resetting switch 51b is always on, it is in the electronic handbrake mode, and the system is an electronic handbrake Function:

Electronic handbrake: When the engine is turned off, the ECU controller 3 in the system receives a corresponding electronic signal, triggers the left coil 43 of the second dual-control two-position three-way solenoid valve 45 to be energized, and the high-pressure gas in the handbrake chamber 1 and the The air outlet port A2 of the second double-control two-position three-way solenoid valve 45 is connected, and the air outlet port A2 of the second double-control two-position three-way solenoid valve 45 is connected with the air inlet port P2 of the second double-control two-position three-way solenoid valve 45 , the air outlet port A1 of the first dual-control two-position three-way solenoid valve 44 communicates with the air intake port P2, and the right coil 43 of the first dual-control two-position three-way solenoid valve 44 is energized so that the air outlet port A1 communicates with the exhaust port R1 , because the exhaust port R1 is directly connected to the atmosphere with an external muffler, the high-pressure air in the handbrake chamber 1 is emptied, the handbrake works, and the direction of the air path is: handbrake chamber——A2——P2——A1——R1 (to the atmosphere) . This function is aimed at automatically enabling the handbrake to work after the car is parked and turned off. When the working conditions are met, the system will send signals to the corresponding two double-control two-position three-way solenoid valves through the wire harness to make the handbrake work;

When the conditions are not met, the ECU controller 3 energizes the left coil 43 of the second dual-control two-position three-way solenoid valve 45 and the left coil 43 of the first dual-control two-position three-way solenoid valve 44, and the handbrake does not work. , the direction of the air path is: the high-pressure air of the handbrake air tank --- P1 --- A1 --- P2 --- A2 --- handbrake air chamber, so that the handbrake is invalid.

(3) When the working status indicators on the first self-resetting switch 51a and the second self-resetting switch 51b panel are not on, they are in manual mode:

This system can only make the whole vehicle be in the parking and handbrake release states with the handbrake acting and parking by the original position and the extended position of the handle of the manual valve 52 . In this state, the ECU controller 3 energizes the right coil 43 of the second dual-control two-position three-way solenoid valve 45, and the high-pressure gas in the handbrake chamber is connected through the air outlet A2 of the second double-control two-position three-way solenoid valve 45 , the air outlet A2 interface communicates with the exhaust interface R2, and leads to the air outlet A3 of the manual valve 52. The handle of the manual valve 52 has two positions. When it is in the original position, the air outlet A3 communicates with the exhaust interface R3, and the exhaust interface R3 leads directly to the atmosphere through the muffler, the gas on the entire pipeline is depressurized, the handbrake works, and the direction of the gas path is: handbrake chamber——A2——R2——A3——R3 (to the atmosphere). When the handle is stretched out, the air inlet port P3 of the manual valve 52 communicates with the air outlet port A3, the entire pipeline and the hand brake air chamber of the rear sub-pump are filled with high-pressure gas, the hand brake is released, and the direction of the gas path is: the hand brake air tank High-pressure air----P3-A3-R2-A2-handbrake air chamber.

As shown in Fig. 4 and Fig. 5, it is a kind of automatic parking system based on air brake described in the specific embodiment 3 of the present invention, which includes a hand brake chamber 1, a hand brake air storage tank 2, and an ECU control system connected to the vehicle power supply. Device 3, air circuit control assembly 4 and mode conversion control assembly 5;

The input interface of the ECU controller 3 is connected to the engine speed signal, the mileage signal, the throttle signal and the gear signal through the conventional automobile circuit or the CAN bus module;

The air circuit control assembly 4 includes a third double-control two-position three-way solenoid valve 46, and the air outlet port A1 and the air intake port P1 of the third double-control two-position three-way solenoid valve 46 communicate with the air pipe respectively. The handbrake air chamber 1 is connected to the handbrake air reservoir 2, the coils 43 arranged on the left and right sides of the third dual-control two-position three-way solenoid valve 46 are respectively connected to the output interface of the ECU controller 3, and the third dual-control solenoid valve 46 is connected to the output interface of the ECU controller 3 respectively. Control two-position three-way solenoid valve 46 exhaust port R1 is connected with muffler 7;

The mode switching control assembly 5 includes a first self-resetting switch 51a and a second self-resetting switch 51b connected to the output interface of the ECU controller 3 through a wire harness, and the first self-resetting switch 51a and the second self-resetting switch 51b There are working status indicator lights and working mode indicator lights on the panel respectively.

The control method of a kind of automatic parking system based on air brake described in specific embodiment 3 of the utility model is as follows:

(1) When the panel working mode indicators on the first self-resetting switch 51a and the second self-resetting switch 51b are always on, they are in the fully automatic mode, and the system plays the functions of automatic parking and electronic handbrake.

Automatic parking function: When the ECU controller 3 in the system receives the electronic signal when the engine is working, the gear is in neutral, the accelerator is fully released, and the vehicle speed is zero, it will trigger the right side of the third dual-control two-position three-way solenoid valve 46. When the side coil 43 is energized, the hand brake chamber 1 communicates with the air outlet port A1 of the third dual-control two-position three-way solenoid valve 46, and the air outlet port A1 of the third double-control two-position three-way solenoid valve 46 communicates with the exhaust port R1. The exhaust port R1 is connected to the muffler 7 directly to the atmosphere, and the high-pressure air in the handbrake air chamber 1 is emptied, the handbrake works, and the direction of the air path is: handbrake air chamber——A1 port——R1 port (to the atmosphere). This function is aimed at the state of the car waiting for the red working status indicator of the traffic signal light, the working conditions are met, and the handbrake works. When the conditions are not satisfied, the left side coil 43 of the third dual-control two-position three-way solenoid valve 46 is triggered to be energized, and the air path direction is: the high-pressure air of the handbrake tank——P1—A1—handbrake air chamber, and the handbrake fails.

Electronic handbrake: When the engine is turned off, the ECU controller 3 in the system receives a corresponding electronic signal, triggers the right coil 43 of the third dual-control two-position three-way solenoid valve 46 to be energized, and the handbrake chamber 1 and the third dual-control The air outlet port A1 of the two-position three-way solenoid valve 46 is connected, and the air outlet port A1 of the third double-control two-position three-way solenoid valve 46 is connected with the exhaust port R1. Since the exhaust port R1 is connected to the muffler 7 directly to the atmosphere, the handbrake is emptied. For the high-pressure air in air chamber 1, the handbrake works, and the direction of the air path is: handbrake air chamber——A1 port——R1 port (through the atmosphere). This function is aimed at meeting the working conditions when the car is parked and turned off, and the handbrake works. When the conditions are not satisfied, the ECU controller 3 in the system receives the corresponding electronic signal, triggers the energization of the left side coil 43 of the third dual-control two-position three-way solenoid valve 46, and the air path direction is: the high-pressure air of the handbrake gas tank- --P1—A1—Handbrake air chamber, handbrake failure.

(2) The working mode indicator light on the panel of the first self-resetting switch 51a is not on, and when the working mode indicator light on the panel of the second self-resetting switch 51b is always on, it is in the electronic handbrake mode, and the system is an electronic handbrake Function,

Electronic handbrake: When the engine is turned off, the ECU controller 3 in the system receives a corresponding electronic signal, triggers the right coil 43 of the third dual-control two-position three-way solenoid valve 46 to be energized, and the handbrake chamber 1 and the third dual-control The air outlet port A1 of the two-position three-way solenoid valve 46 is connected, and the air outlet port A1 of the third double-control two-position three-way solenoid valve 46 is connected with the exhaust port R1. Since the exhaust port R1 is connected to the muffler 7 directly to the atmosphere, the handbrake is emptied. For the high-pressure air in air chamber 1, the handbrake works, and the direction of the air path is: handbrake air chamber——A1 port——R1 port (through the atmosphere). This function is aimed at meeting the working conditions when the car is parked and turned off, and the handbrake works. When the conditions are not met, the ECU controller 3 in the system receives the corresponding electronic signal, triggers the left coil 43 of the third dual-control two-position three-way solenoid valve 46 to be energized, and the air path direction is: the high-pressure air of the handbrake air tank- --P1—A1—P interface—handbrake air chamber, handbrake failure.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (8)

1. An automatic parking system based on air brakes, comprising a hand brake air chamber and a hand brake air reservoir, characterized in that it also includes an ECU controller connected to the vehicle power supply, an air circuit control assembly and a mode conversion control assembly; The hand brake air chamber is connected to the air circuit control assembly through the air pipe; The input end of the ECU controller is connected with the automobile conventional circuit or the CAN bus module, and receives the engine speed signal, the mileage signal, the throttle signal and the gear signal; Connected with the mode conversion control assembly; The air circuit control assembly is connected to the ECU controller through a wire harness, and the air circuit control assembly is respectively connected to the handbrake air chamber and the handbrake air storage tank through the air pipe; The mode conversion control assembly is connected with the air circuit control assembly through the air pipe. 2. The air brake-based automatic parking system according to claim 1, wherein the air path control assembly includes a dual-control two-position solenoid valve and two The two coils at the end, the outlet port of the double-control two-position solenoid valve is connected with the handbrake air chamber through the air pipe; connected; the exhaust port of the dual-control two-position solenoid valve is connected to the muffler; The two coils are respectively connected to the output ends of the ECU controller through the wire harness. 3 . The air brake-based automatic parking system according to claim 2 , wherein the dual-control two-position solenoid valve is a dual-control two-position three-way solenoid valve. 4 . 4. An air brake-based automatic parking system according to claim 1, characterized in that the air path control assembly includes a first dual-control two-position solenoid valve, a second double-control two-position solenoid valve, and a second double-control two-position solenoid valve Solenoid valve and four coils, the intake ports of the first dual-control two-position solenoid valve and the second double-control two-position solenoid valve are connected through air pipes, and then respectively connected with the handbrake air reservoir and the mode conversion control assembly through air pipes ; The outlet port of the first double-control two-position solenoid valve is connected with the exhaust port of the second double-control two-position solenoid valve; the exhaust port of the first double-control two-position solenoid valve is connected to the muffler; The air outlet port of the second dual-control two-position solenoid valve is connected with the handbrake air chamber through the air pipe; A coil is respectively arranged on the left and right sides of the first double-control two-position solenoid valve; a coil is respectively arranged on the left and right sides of the second double-control two-position solenoid valve; The output is connected. 5. The air brake-based automatic parking system according to claim 4, wherein the first dual-control two-position solenoid valve and the second dual-control two-position solenoid valve adopt a dual-control two-position three-way Solenoid valve or double control two-position five-way solenoid valve; The pressure port of the dual-control two-position five-way solenoid valve is provided with a pressure sensor, and the pressure sensor is connected to the output end of the ECU controller through a wire harness. 6. The air brake-based automatic parking system according to any one of claims 1-5, wherein the mode conversion control assembly includes two self-resetting switches; the two self-resetting switches They are respectively connected to the output terminals of the ECU controller through the wire harness. 7. A kind of automatic parking system based on air brake according to claim 6, characterized in that, said mode switching control assembly also includes a manual valve respectively provided with an air outlet port, an air inlet port and an exhaust port The exhaust interface of the manual valve is connected to the muffler; the air inlet interface of the manual valve is connected with the air circuit control assembly through the air pipe; the air outlet interface of the manual valve is connected with the air circuit control assembly through the air pipe connect. 8 . The air brake-based automatic parking system according to claim 7 , wherein the mode conversion control assembly further includes a working mode indicator light and a working state indicator light.