CN111409547A - Brake lamp control system and method - Google Patents

Abstract

The invention discloses a brake light control system and method. The body controller BCM judges according to the preset control logic according to the request signal sent by the dual-loop pedal stroke sensor, the electronic parking brake system EPBi and the vehicle controller VCU. After that, the control level signal is sent to the brake light control circuit, and the brake light control circuit controls the relay to disconnect or pull in, so as to realize the diversified and accurate control of the brake light.

Description

A brake light control system and method

technical field

The invention relates to the technical field of new energy vehicles, in particular to a brake light control system and method.

Background technique

Car brake lights (i.e. brake lights) are generally installed at the rear of the car, and the theme color is generally red lights, so that the vehicles behind can more easily find the brakes of the front car. The brake lights play a role in preventing rear-end collisions. During the braking process of the car , the brake lights come on to warn the vehicles behind.

In the vehicle braking system, hard-wire the brake light switch to the brake light to directly drive the brake light, that is, just connect the brake light switch to the brake light, and control the brake light through the brake light switch On or off, and pedal stroke design is difficult.

At the same time, with the improvement of additional functions of automobiles and the realization of the braking energy recovery function of new energy vehicles, it is necessary to install a brake pedal travel sensor, so the way of lighting the brake lights should not only rely on the brake light switch.

SUMMARY OF THE INVENTION

The invention discloses a brake light control system, which utilizes a dual-circuit pedal travel sensor to connect with BCM and VCU to realize various control modes of the brake light.

The invention also provides a brake light control method, which utilizes the dual-circuit pedal travel sensor to connect with BCM and VCU to realize various control modes of the brake light.

A brake light control system disclosed by the invention comprises a dual-loop pedal stroke sensor, a body controller BCM, a vehicle controller VCU, an electronic parking brake system EPBi, a brake light control circuit and a brake light;

One signal of the dual-loop pedal travel sensor is connected to the BCM signal input end of the body controller, and the BCM signal output end of the body controller is connected to the input end of the brake light control circuit, which controls the brake light to turn on or off;

The other signal of the dual-loop pedal travel sensor is connected to the VCU signal input terminal of the vehicle controller, and the VCU output terminal of the vehicle controller is connected to the electronic parking brake system EPBi, and the electronic parking brake system EPBi performs the braking energy recovery function; At the same time, the output end of the electronic parking brake system EPBi is connected to the corresponding signal input end of the body controller BCM, and the electronic parking brake system EPBi sends a brake light request signal to the body controller BCM.

Further, the other signal of the dual-loop pedal stroke sensor is connected to the VCU signal input end of the vehicle controller, and the VCU signal output terminal of the vehicle controller is connected to the braking priority system EEPO, and outputs the braking signal to the braking priority system EEPO. , used for brake priority system EEPO to determine brake priority.

Further, the signal output end of the body controller BCM is connected to the shifter controller; the body controller BCM receives one signal output from the dual-loop pedal stroke sensor, and controls the shifter controller to accept the shift request.

Further, the brake lights include a high-mounted brake light, a left rear brake light and a right rear brake light; the brake light control circuit and the brake lights respectively include a high-mounted brake light, a left rear brake light, and a left rear brake light. The rear brake light and the control end of the right rear brake light are connected.

Further, the vehicle controller VCU is connected to the ignition switch; after the vehicle controller VCU receives another signal output by the dual-loop pedal stroke sensor, the vehicle controller VCU can receive the ignition request signal of the ignition switch.

Further, the body controller BCM and the vehicle controller VCU realize communication interaction through the CAN network; the vehicle controller VCU sends a brake light control request signal to the body controller BCM for brake signal backup. .

A brake light control method disclosed in the present invention, using the above brake light control system, includes the following steps:

Step 1) The dual-loop pedal stroke sensor inputs a brake signal to the body controller BCM signal, the body controller BCM inputs a brake light control signal to the brake light control circuit, and the brake light controls The circuit controls the brake light on or off;

Step 2) The dual-loop pedal stroke sensor simultaneously inputs a braking signal to the vehicle controller VCU, and performs the following operations:

21) The vehicle controller VCU inputs a braking energy recovery signal to the electronic parking brake system EPBi, and the electronic parking brake system EPBi performs a braking energy recovery function; at the same time, the electronic parking brake system EPBi inputs a request signal for turning on the brake light to the body controller BCM;

22) The vehicle controller VCU controls the braking priority system EEPO, which is used for the braking priority system EEPO to determine the braking priority;

23) The vehicle controller VCU can receive the ignition request signal of the ignition switch;

24) The vehicle controller VCU outputs a shift request signal to the shifter controller.

Further, in step 1), the brake light control circuit outputs a brake light on or off command to the high-mounted brake light, the left rear brake light and the right rear brake light, respectively.

The beneficial effects of the present invention are: the signal provided by the dual-circuit pedal stroke sensor combined with the hydraulic signal of the built-in hydraulic sensor in the EPBi control unit, the body controller BCM and the vehicle controller VCU jointly realize more reasonable, accurate and diversified brake lights Control, and the invention has a simple structure, and the installation process of the pedal stroke sensor intersects the brake light switch is simpler, the assembly is good, and the production efficiency can be improved; the pedal stroke sensor, which is indispensable for new energy vehicles, can be used for multiple purposes, and the brake light is eliminated. switch, further reducing vehicle development costs.

Description of drawings

FIG. 1 is a schematic diagram of a brake light control system of the present invention.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings.

A brake light control system disclosed in the present invention includes a dual-loop pedal travel sensor 1, a body controller BCM3, a vehicle controller VCU4, an electronic parking brake system EPBi2, a brake light control circuit 11 and a brake light.

The dual-loop pedal stroke sensor 1 outputs A/D signals according to the operation of the user stepping on the brake pedal. One signal of the dual-loop pedal stroke sensor 1 is connected to the BCM3 signal input terminal of the body controller, and the BCM3 signal output terminal of the body controller is connected to the brake light. The input end of the control circuit 11, the control circuit controls the opening or closing of the relay, thereby controlling the lighting and extinguishing of the brake light.

The other signal of the dual-loop pedal travel sensor 1 is connected to the signal input terminal of the vehicle controller VCU4, and the output terminal of the vehicle controller VCU4 is connected to the electronic parking brake system EPBi2, which performs the braking energy recovery function. At the same time, the output end of the electronic parking brake system EPBi2 is connected to the corresponding signal input end of the body controller BCM3, and the electronic parking brake system EPBi2 has a built-in hydraulic sensor and sends a lighted brake light to the body controller BCM3 request signal;

The other signal of the dual-loop pedal travel sensor 1 is connected to the signal input terminal of the vehicle controller VCU4, and the signal output terminal of the vehicle controller VCU4 is connected to the braking priority system EEPO6, and outputs the braking signal to the braking priority system EEPO6, using The braking priority is determined in the braking priority system EEPO6.

The signal output end of the body controller BCM3 is connected to the shifter controller 7; the body controller BCM3 receives one signal output from the dual-loop pedal stroke sensor 1, and controls the shifter controller 7 to accept the shift request.

The brake lights include a high-mounted brake light 9, a left rear brake light 10 and a right rear brake light 8; the brake light control circuit and the brake lights respectively include a high-mounted brake light, a left rear brake light The rear brake light and the control end of the right rear brake light are connected.

The vehicle controller VCU4 is connected to the ignition switch 5; after the vehicle controller VCU receives another signal output by the dual-loop pedal stroke sensor, the vehicle controller VCU can receive the ignition request signal from the ignition switch.

The body controller BCM3 and the vehicle controller VCU4 realize communication interaction through the CAN network; the vehicle controller VCU4 sends a brake light control request signal to the body controller BCM3 for braking signal backup, preventing double One signal of circuit pedal travel sensor 1 is interrupted.

A brake light control method, using the above system, includes the following steps:

Step 1) The dual-loop pedal travel sensor 1 inputs the brake signal to the body controller BCM3 signal, the body controller BCM3 inputs the brake light control signal to the brake light control circuit 11, and the brake light control circuit 11 respectively sends the high-level control signal to the brake light control circuit 11. The moving light 9, the left rear brake light 10 and the right rear brake light 8 output the brake light on or off command;

Step 2) The dual-loop pedal stroke sensor 1 simultaneously inputs the braking signal to the vehicle controller VCU4, and performs the following operations:

21) The vehicle controller VCU4 inputs the braking energy recovery signal to the electronic parking brake system EPBi2, and the electronic parking brake system EPBi2 performs the braking energy recovery function; at the same time, the electronic parking brake system EPBi2 reports to the body controller BCM3 Input the request signal for turning on the brake light;

22) The vehicle controller VCU4 controls the braking priority system EEPO6, which is used for the braking priority system EEPO6 to determine the braking priority;

23) The vehicle controller VCU4 can receive the ignition request signal of the ignition switch;

24) The vehicle controller VCU4 outputs a shift request signal to the shifter controller 7 .

According to a brake light control system and method disclosed in the present invention, the body controller BCM3 is based on the request signal sent by the dual-loop pedal stroke sensor 1, the electronic parking brake system EPBi2, and the vehicle controller VCU4, according to the preset control logic. After the judgment, a control level signal is sent to the brake light control circuit 11, and the brake light control circuit controls the relay to be disconnected or closed, thereby realizing diversified and accurate control of the brake lights.

Claims (8)

1. A brake light control system, characterized in that: comprising a dual-circuit pedal stroke sensor (1), a body controller BCM (3), a vehicle controller VCU (4), an electronic parking brake system EPBi (2) ), the brake light control circuit (11) and the brake light; One signal of the dual-loop pedal travel sensor (1) is connected to the signal input end of the body controller BCM (3), and the signal output end of the body controller BCM (3) is connected to the input end of the brake light control circuit, which controls the control Lights on or off; The other signal of the dual-loop pedal travel sensor (1) is connected to the signal input terminal of the vehicle controller VCU (4), and the output terminal of the vehicle controller VCU is connected to the electronic parking brake system EPBi (2). The system EPBi(2) performs the braking energy recovery function; at the same time, the output end of the electronic parking brake system EPBi(2) is connected to the corresponding signal input end of the body controller BCM(3). (2) Sending a brake lamp lighting request signal to the body controller BCM (3). 2. A brake light control system according to claim 1, characterized in that: the other signal of the dual-circuit pedal travel sensor (1) is connected to the signal input end of the vehicle controller VCU (4), and the The signal output end of the vehicle controller VCU is also connected to the braking priority system EEPO (6), and outputs a braking signal to the braking priority system EEPO (6), which is used for the braking priority system EEPO (6) to determine the braking priority. 3. A brake light control system according to claim 2, characterized in that: the signal output end of the body controller BCM (3) is connected to the shifter controller (7); the body controller BCM receives A signal output from the dual-loop pedal stroke sensor controls the shifter controller to accept the shift request. 4. A brake light control system according to claim 3, characterized in that: the brake light comprises a high-mounted brake light (9), a left rear brake light (10) and a right rear brake Lamp (8); the brake lamp control circuit is respectively connected with the control ends of the brake lamp including the high-position brake lamp, the left rear brake lamp and the right rear brake lamp. 5 . The brake light control system according to claim 4 , wherein the vehicle controller VCU is connected to the ignition switch ( 5 ); the vehicle controller VCU receives the output of the dual-loop pedal stroke sensor. 6 . After another signal is sent, the vehicle controller VCU can receive the ignition request signal of the ignition switch. 6 . The brake light control system according to claim 5 , wherein: the body controller BCM and the vehicle controller VCU realize communication interaction through a CAN network; the vehicle controller VCU communicates with the The body controller BCM sends a brake light control request signal for brake signal backup. 7. A brake light control method, characterized in that: using a brake light control system according to claim 6, comprising the following steps: Step 1) The dual-loop pedal travel sensor (1) inputs a braking signal to the body controller BCM (3) signal, and the body controller BCM inputs a brake light control signal to the brake light control circuit, The brake light control circuit controls the light on or off of the brake light; Step 2) The dual-circuit pedal travel sensor (1) simultaneously inputs a braking signal to the vehicle controller VCU (4), and performs the following operations: 21) The vehicle controller VCU (4) inputs a braking energy recovery signal to the electronic parking brake system EPBi, and the electronic parking brake system EPBi (2) performs a braking energy recovery function; at the same time, the The electronic parking brake system EPBi (2) inputs a brake light request signal to the body controller BCM (3); 22) The vehicle controller VCU controls the braking priority system EEPO (6), which is used for the braking priority system EEPO (6) to determine the braking priority; 23) The vehicle controller VCU (4) can receive the ignition request signal of the ignition switch; 24) The vehicle controller VCU (4) outputs a shift request signal to the shifter controller. 8. The control method according to claim 7, characterized in that: in step 1), the brake light control circuit (11) sends signals to the high-mounted brake light (9) and the left rear brake light (10) respectively. and the right rear brake light (8) to output the brake light on or off command.

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