CN213705404U

CN213705404U - Automatic parking system for vehicle

Info

Publication number: CN213705404U
Application number: CN202022807805.0U
Authority: CN
Inventors: 郭伟伟
Original assignee: Nanjing Hengtian Lingrui Automobile Co ltd
Current assignee: Nanjing Hengtian Lingrui Automobile Co ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-07-16
Anticipated expiration: 2030-11-30

Abstract

The utility model discloses an automatic parking system of vehicle, two-way single-pass solenoid valve, braking gas receiver and two ABS solenoid valves are connected respectively to four valve ports on the relay valve, and a back brake air chamber is connected respectively to every ABS solenoid valve, and relay valve, air-vent valve and the master valve of braking are connected respectively to three valve port on the two-way single-pass solenoid valve, and the air-vent valve links to each other with the ASR solenoid valve, and the ASR solenoid valve links to each other with the braking gas receiver. When the vehicle simultaneously meets the condition that ON gear is effective, the rotating speed of the motor is less than or equal to 50rpm, the opening of the brake pedal is greater than or equal to 25% and lasts for 1.5s, the VCU actively sends a braking instruction and enables the ASR electromagnetic valve to be electrified, the ASR electromagnetic valve controls the brake lamp to work and remind a rear vehicle after being electrified, and after the ASR electromagnetic valve is electrified, a braking gas circuit sequentially passes through the braking gas cylinder, the ASR electromagnetic valve, the pressure regulating valve, the two-way one-way electromagnetic valve, the relay valve, the ABS electromagnetic valve and the rear braking gas chamber and actively. The utility model discloses the scheme is simple, does not need too many operations, provides the security for going of vehicle.

Description

Automatic parking system for vehicle

The technical field is as follows:

the utility model relates to an automatic parking system of vehicle.

Background art:

the existing pure electric vehicles are more and more, the hill start of the electric vehicle is more and more important due to the fact that the quality of the existing domestic electric control products is too much, and most of the vehicles on the market do not have the hill start function. Even there is the function of staying the slope, also reach the purpose that the vehicle stopped by the motor access, it is not very good to stay the effect on slope along with the change of producer, for effectual improvement vehicle stays the slope function to improve and drive experience and increase driving safety, this patent provides a neotype automatic parking system of vehicle and method.

The invention content is as follows:

the utility model relates to a solve the problem that above-mentioned prior art exists and provide an automatic parking system of vehicle and method.

The utility model discloses the technical scheme who adopts has:

the automatic parking system for the vehicle comprises a rear brake air chamber, ABS (anti-lock brake system) electromagnetic valves, a relay valve, two-way single-pass electromagnetic valves, a pressure regulating valve, an ASR (anti-theft) electromagnetic valve, a brake air reservoir and a brake master valve, wherein four valve ports on the relay valve are respectively connected with the two-way single-pass electromagnetic valves, the brake air reservoir and the two ABS electromagnetic valves, each ABS electromagnetic valve is respectively connected with one rear brake air chamber, three valve ports on the two-way single-pass electromagnetic valves are respectively connected with the relay valve, the pressure regulating valve and the brake master valve, the pressure regulating valve is connected with the.

Furthermore, a relay is connected to the ASR solenoid valve, the relay is connected with a VCU of the vehicle, after the VCU controls the relay to be switched on, the ASR solenoid valve is electrified and switched on, and the brake gas in the air storage cylinder sequentially passes through the ASR solenoid valve, the pressure regulating valve, the two-way one-way solenoid valve, the relay valve, the ABS solenoid valve and the rear brake air chamber and actively brakes the vehicle.

An automatic parking method for a vehicle is characterized in that: the method comprises the following steps:

1) when the vehicle simultaneously meets the condition that the ON gear is effective, the rotating speed of a motor is less than or equal to 50rpm, the opening of a brake pedal is greater than or equal to 25% and lasts for 1.5s, the VCU actively sends a braking instruction and enables the ASR electromagnetic valve to be electrified, the ASR electromagnetic valve controls a brake lamp to work and remind a rear vehicle after being electrified, and after the ASR electromagnetic valve is electrified, a braking gas circuit sequentially passes through a braking gas cylinder, the ASR electromagnetic valve, a pressure regulating valve, a two-way one-way electromagnetic valve, a relay valve, an ABS electromagnetic valve and a rear braking gas chamber and actively brakes the vehicle to finish;

2) when the accelerator opening of the vehicle is larger than 5% of the peak torque of the motor and lasts for 200ms, the VCU actively sends a braking instruction, enables the ASR electromagnetic valve to be de-energized and quits the automatic parking function of the vehicle.

The utility model discloses following beneficial effect has:

1) the utility model adds the pressure regulating valve which can be arbitrarily arranged between 0 and 1.0Mpa, thus well solving the problem of different braking force along with different vehicles;

2) mechanical braking is fully considered in the control strategy to relieve vehicle backward slip, and if the motor is connected at the moment, great impact force is generated, so that serious consequences are caused. Therefore, when the mechanical brake is not released in the first 200ms when the Auto Hold function is exited, the motor torque already exists, and the reasonable smooth connection ensures that the vehicle does not roll backwards;

the utility model discloses the scheme is simple, does not need too many operations, has only increased parts such as wane switch, relay, ASR solenoid valve, air-vent valve, two-way one-way solenoid valve in the state of keeping away, has just realized Auto Hold's function, can let the vehicle go on level road and ramp and block up or need park the unnecessary foot of a journey and step on the brake always, optimized the mode of driving, provide the security for the going of vehicle, the utility model discloses the operation is simple and easy, and is with low costs, and the principle is simple, and the security performance is high.

Description of the drawings:

fig. 1 is a schematic diagram of the system of the present invention.

Fig. 2 is a circuit diagram of the relay connected to the ASR solenoid valve of the present invention.

Fig. 3 is an operation flow chart of the present invention.

The specific implementation mode is as follows:

the present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1, the utility model relates to an automatic parking system of vehicle, including back brake chamber 1, ABS solenoid valve 2, relay valve 3, two-way one-way solenoid valve 4, air-vent valve 5, ASR solenoid valve 6, braking gas receiver 7 and braking main valve 8.

Four valve ports on the relay valve 3 are respectively connected with a two-way one-way electromagnetic valve 4, a braking air reservoir 7 and two ABS electromagnetic valves 2, each ABS electromagnetic valve 2 is respectively connected with a rear braking air chamber 1, three valve ports on the two-way one-way electromagnetic valve 4 are respectively connected with the relay valve 3, a pressure regulating valve 5 and a main braking valve 8, the pressure regulating valve 5 is connected with an ASR electromagnetic valve 6, and the ASR electromagnetic valve 6 is connected with the braking air reservoir 7.

As shown in fig. 2, a relay 9 is connected to the ASR solenoid valve 6, the relay 9 is connected to a VCU of the vehicle, the VCU is connected to an instrument of the vehicle, after the VCU controls the relay 9 to be switched on, the ASR solenoid valve 6 is energized and switched on, and the brake gas in the air cylinder 7 passes through the ASR solenoid valve 6, the pressure regulating valve 5, the two-way one-way solenoid valve 4, the relay valve 3, the ABS solenoid valve 2 and the rear brake chamber 1 in sequence, and the vehicle is actively braked.

In the parking system, the instrument of the vehicle supports the CAN communication function, and displays the basic information of the vehicle, and the VCU controls the whole vehicle function and the ECU of the vehicle safety.

The ASR electromagnetic valve 6 is arranged between the braking air reservoir 7 and the braking air chamber and is connected with a normal braking loop in parallel, when the ASR electromagnetic valve is not electrified, the ASR electromagnetic valve is in a non-conduction state, and the braking air chamber is not ventilated and is not mechanically braked; when the ASR electromagnetic valve is electrified, the ASR electromagnetic valve is in a conducting state, and the brake air chamber is ventilated to perform mechanical braking.

The pressure regulating valve 5 is connected in series between the ASR electromagnetic valve 6 and the brake chamber and is used for regulating the specific pressure input into the brake chamber by the brake air cylinder when the ASR electromagnetic valve acts, and the magnitude of the braking force is controlled by regulating the magnitude of the pressure.

The bidirectional one-way electromagnetic valve 4 is used for braking an air passage of a conventional brake and an air pipe of an Auto Hold brake circuit through the bidirectional one-way electromagnetic valve, and the two are not communicated with each other.

The relay is connected with a self-reset rocker switch, the self-reset rocker switch is used for starting and stopping the Auto Hold function, the first power-on state is a power-off state, the Auto Hold switch is pressed to turn on the Auto Hold switch and display that the Auto Hold function is started on the instrument, and the Auto Hold switch is turned off to display that the Auto Hold function is stopped.

With reference to fig. 3, the utility model discloses the automatic parking method of vehicle does:

1) the whole vehicle electric control system has no three-stage or more faults, when the vehicle simultaneously meets the conditions that an ON gear is effective, the rotating speed of a motor is less than or equal to 50rpm, the opening of a brake pedal is greater than or equal to 25% and lasts for 1.5s, the VCU actively sends a brake instruction and enables the relay to work, the ASR electromagnetic valve is electrified after the relay works, and the ASR electromagnetic valve 6 is electrified to control a brake lamp to work and remind a rear vehicle. Meanwhile, after the ASR electromagnetic valve 6 is electrified, the braking air path sequentially passes through the braking air cylinder 7, the ASR electromagnetic valve 6, the pressure regulating valve 5, the bidirectional one-way electromagnetic valve 4, the relay valve 3, the ABS electromagnetic valve 2 and the rear braking air chamber 1, and the vehicle is actively braked, so that the automatic parking function of the vehicle is completed. The magnitude of the braking force can be calibrated according to the maximum allowable climbing angle of the vehicle.

When the vehicle has performed the Auto Hold function, the exit Auto Hold condition is as follows:

2) when the accelerator opening (actual torque request) of the vehicle is greater than 5% of the peak torque of the motor and lasts for 200ms, the VCU actively sends a braking instruction, enables the ASR electromagnetic valve 6 to be de-energized and quits the automatic parking function of the vehicle. Before 200ms when Auto Hold disappears, the motor already responds to the torque, the vehicle can be guaranteed not to be broken after mechanical braking disappears, the two are smoothly connected, and good experience is brought to driving.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications can be made without departing from the principle of the present invention, and these modifications should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a vehicle automatic parking system which characterized in that: the brake system comprises a rear brake air chamber (1), ABS (anti-lock brake system) electromagnetic valves (2), a relay valve (3), a two-way single-pass electromagnetic valve (4), a pressure regulating valve (5), an ASR (automatic braking system) electromagnetic valve (6), a brake air cylinder (7) and a master brake valve (8), wherein four valve ports on the relay valve (3) are respectively connected with the two-way single-pass electromagnetic valve (4), the brake air cylinder (7) and the two ABS electromagnetic valves (2), each ABS electromagnetic valve (2) is respectively connected with one rear brake air chamber (1), three valve ports on the two-way single-pass electromagnetic valve (4) are respectively connected with the relay valve (3), the pressure regulating valve (5) and the master brake valve (8), the pressure regulating valve (5) is connected with the ASR electromagnetic valve (.

2. The automatic parking system for a vehicle according to claim 1, characterized in that: be connected with relay (9) on ASR solenoid valve (6), relay (9) link to each other with the VCU of vehicle, VCU control relay (9) switch-on back, and ASR solenoid valve (6) are electrified and are switched on, and the brake gas in gas receiver (7) passes through ASR solenoid valve (6), air-vent valve (5), two-way one-way solenoid valve (4), relay valve (3), ABS solenoid valve (2) and back brake air chamber (1) in proper order to initiatively brake the vehicle.