Method for controlling a brake system of a motor vehicle with all-wheel drive
AssigneeContinental Teves AG & Co. oHG
InventorsJochen Führer, Lothar Kienle, Gregor Schmitt
Life of this patent
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Abstract
A method of controlling a brake system of an all-wheel driven motor vehicle, which includes an electro-regenerative brake and a number of friction brakes such that a total brake torque comprises brake torque components of the friction brakes and of the electro-regenerative brake; the brake torque of the electro-regenerative brake is subdivided between the front axle and rear axle in predetermined ratios. The brake torque generated by the electro-regenerative brake is limited to such an extent that the brake slip of one axle of the motor vehicle does not exceed a selectable maximum value.
Claims16
A method for controlling a brake system of a motor vehicle with all-wheel drive, the brake system including an electro-regenerative brake and a plurality of friction brakes such that a total brake torque comprises brake torque components generated by the friction brakes and generated by the electro-regenerative brake, the method comprising the steps of:
- subdividing the brake torque generated by the electro-regenerative brake between a first axle of the motor vehicle and a second axle of the motor vehicle in a predetermined ratio;
- and
- limiting the brake torque generated by the electro-regenerative brake to such an extent that a brake slip of the first axle of the motor vehicle does not exceed a selectable maximum value,
- wherein the brake torque generated by the electro-regenerative brake is reduced continuously when the brake slip of the first axle reaches the selectable maximum brake slip.
A brake system of a motor vehicle, comprising:
- an electro-regenerative brake and a plurality of friction brakes such that a total deceleration comprises deceleration components of the friction brakes and the electro-regenerative brake;
- and
- a control unit configured to subdivide the deceleration of the electro-regenerative brake between a first axle of the motor vehicle and a second axle of the motor vehicle in a predetermined ratio and limit the deceleration generated by the electro-regenerative brake to such an extent that a brake slip of the first axle of the motor vehicle does not exceed a selectable maximum value,
- wherein the brake torque generated by the electro-regenerative brake is reduced continuously when the brake slip of the first axle reaches the selectable maximum brake slip.
A method for controlling a brake system of a motor vehicle with all-wheel drive, the brake system including an electro-regenerative brake and a plurality of friction brakes such that a total brake torque comprises brake torque components generated by the friction brakes and generated by the electro-regenerative brake, the method comprising the steps of:
- subdividing the brake torque generated by the electro-regenerative brake between a first axle of the motor vehicle and a second axle of the motor vehicle in a predetermined ratio;
- and
- limiting the brake torque generated by the electro-regenerative brake to such an extent that a brake slip of the first axle of the motor vehicle does not exceed a selectable maximum value,
- wherein when the brake slip of the first axle reaches the selectable maximum brake slip the brake torque generated by the electro-regenerative brake is reduced and the brake torque generated by the friction brakes at the second axle is increased.
A method for controlling a brake system of a motor vehicle with all-wheel drive, the brake system including an electro-regenerative brake and a plurality of friction brakes such that a total brake torque comprises brake torque components generated by the friction brakes and generated by the electro-regenerative brake, the method comprising the steps of:
- subdividing the brake torque generated by the electro-regenerative brake between a first axle of the motor vehicle and a second axle of the motor vehicle in a predetermined ratio;
- and
- limiting the brake torque generated by the electro-regenerative brake to such an extent that a brake slip of the first axle of the motor vehicle does not exceed a selectable maximum value,
- wherein when the brake slip of the first axle reaches the selectable maximum brake slip the brake torque generated by the electro-regenerative brake is reduced and a redistribution of the brake torque to the second axle is performed.
A method for controlling a brake system of a motor vehicle with all-wheel drive, the brake system including an electro-regenerative brake and a plurality of friction brakes such that a total brake torque comprises brake torque components generated by the friction brakes and generated by the electro-regenerative brake, the method comprising the steps of:
- subdividing the brake torque generated by the electro-regenerative brake between a first axle of the motor vehicle and a second axle of the motor vehicle in a predetermined ratio;
- and
- limiting the brake torque generated by the electro-regenerative brake to such an extent that a brake slip of the first axle of the motor vehicle does not exceed a selectable maximum value,
- wherein when the brake slip of the first axle reaches the selectable maximum brake slip, a prevailing brake torque of the first axle is maintained constant.
A method for controlling a brake system of a motor vehicle with all-wheel drive, the brake system including an electro-regenerative brake and a plurality of friction brakes such that a total brake torque comprises brake torque components generated by the friction brakes and generated by the electro-regenerative brake, the method comprising the steps of:
- subdividing the brake torque generated by the electro-regenerative brake between a first axle of the motor vehicle and a second axle of the motor vehicle in a predetermined ratio;
- and
- limiting the brake torque generated by the electro-regenerative brake to such an extent that a brake slip of the first axle of the motor vehicle does not exceed a selectable maximum value,
- wherein when the brake slip of the first axle reaches the selectable maximum brake slip, the brake torque generated by the electro-regenerative brake is reduced or a prevailing brake torque of the first axle is maintained constant depending on the braking situation.
A method for controlling a brake system of a motor vehicle with all-wheel drive, the brake system including an electro-regenerative brake and a plurality of friction brakes such that a total brake torque comprises brake torque components generated by the friction brakes and generated by the electro-regenerative brake, the method comprising the steps of:
- subdividing the brake torque generated by the electro-regenerative brake between a first axle of the motor vehicle and a second axle of the motor vehicle in a predetermined ratio;
- limiting the brake torque generated by the electro-regenerative brake to such an extent that a brake slip of the first axle of the motor vehicle does not exceed a selectable maximum value,
- determining a prevailing efficiency;
- and
- applying a correction factor to a nominal deceleration of the plurality of friction brakes or to a nominal deceleration of the electro-regenerative brake based on the prevailing efficiency.
Dependencies are inferred from the claim text.