Control of regenerative braking in an electric or hybrid vehicle
A method controls regenerative braking of a vehicle equipped with regenerative brakes and with a separate braking apparatus. The method is designed to generate a regenerative braking setpoint as a function of a braking request signal coming from a driver pedal of the vehicle, according to a first setpoint generation mode. The method includes receiving a flag signal coming from an active safety system of the vehicle, detecting value changes of the received flag signal, when the received flag signal changes value to take a value corresponding to activation of regulation by the active safety system, incrementing a counter value, and comparing the counter with a threshold. When the counter reaches the threshold, a control signal is formed to end the generation of the regenerative braking setpoint according to the first calculation mode and to impose generation of the regenerative braking setpoint according to a second calculation mode.
1. A method for controlling regenerative braking of a vehicle equipped with a first, regenerative, braking means, including an electrical actuator to apply the regenerative braking to the vehicle, and with a second braking means separate from the first braking means, which method is designed to generate a regenerative braking setpoint as a function of a braking request signal coming from a driver pedal of the vehicle, according to a first calculation mode, the method comprising:
receiving, via a processor, a flag signal coming from an active safety system of the vehicle;
detecting, via the processor, value changes of the received flag signal;
when the received flag signal changes value to take a value corresponding to activation of regulation by the active safety system, incrementing, via the processor, a counter value;
comparing, via the processor, the counter with a threshold;
when the counter reaches said threshold, forming, via the processor, a control signal so as to end the generation of the regenerative braking setpoint according to the first calculation mode and to impose generation of the regenerative braking setpoint according to a second calculation mode; and
applying the regenerative braking setpoint to the electrical actuator to control the regenerative braking of the vehicle.
2. The control method as claimed in claim 1 , wherein when the regenerative braking setpoint is generated according to the second calculation mode, the regenerative braking setpoint is zero.
3. The control method as claimed in claim 1 , further comprising:
applying a time filtering to the received flag signal prior to the detecting the value changes.
4. The method as claimed in claim 1 , further comprising:
receiving a master cylinder pressure signal;
comparing the master cylinder pressure signal with a pressure threshold; and
preventing the incrementing of the counter value when the master cylinder pressure is greater than the pressure threshold.
5. A device for controlling regenerative braking of a vehicle equipped with a first, regenerative, braking means and with a second braking means separate from the first braking means, which device is designed to generate a regenerative braking setpoint as a function of a braking request signal coming from a driver pedal of the vehicle, according to a first calculation mode, the device comprising:
reception means for receiving a flag signal coming from an active safety system of the vehicle, and
a processor configured to detect value changes of the received flag signal, to increment a counter value when the received flag signal changes value to take a value corresponding to activation of regulation by the active safety system, to compare the counter with a threshold and, when the counter reaches said threshold, to form a control signal so as to end the generation of the regenerative braking setpoint according to the first calculation mode and to impose generation of this regenerative braking setpoint according to a second calculation mode.
6. The device according to claim 5 , wherein the processor is a central processing unit.
7. A motor vehicle, comprising:
a first, regenerative, braking system:
a second braking system separate from the first braking system; and
a control system for controlling regenerative braking of a vehicle equipped with a first, regenerative, braking means and with a second braking means separate from the first braking means, comprising
a module to generate a regenerative braking setpoint as a function of a braking request signal coming from a driver pedal of the vehicle, according to a first calculation mode and according to a second calculation mode, and
a control device including reception means for receiving a flag signal coming from an active safety system of the vehicle, and a processor configured to detect value changes of the received flag signal, to increment a counter value when the received flag signal changes value to take a value corresponding to activation of regulation by the active safety system, to compare the counter with a threshold and, when the counter reaches said threshold, to form a control signal so as to end the generation of the regenerative braking setpoint according to the first calculation mode and to impose generation of this regenerative braking setpoint according to a second calculation mode.
8. The motor vehicle as claimed in claim 7 , wherein the generation module comprises a braking management module arranged in order to calculate the regenerative braking setpoint value by multiplying a braking value representative of the braking carried out by the second braking means by a coefficient which depends on the calculation mode imposed.
9. The motor vehicle as claimed in claim 7 , further comprising:
an electrical actuator to exert braking on rear wheels of the motor vehicle.