Method for operating a brake system with increased safety in the fallback level and brake system with increased safety in the fallback level
AssigneeContinental Automotive Technologies GmbH
InventorsThorsten Ullrich, Martin Baechle, Tobias Scheller
Life of this patent
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Abstract
The embodiments generally relate to a method for operating a brake system with increased safety in the fallback level, and to such a brake system for a motor vehicle. Here, the brake system may comprise a brake system which requires no operating fluids. Here, the method for operating the brake system provides for actuating wheel brake modules of the motor vehicle in a normal operating level by a central control electronics unit, and for actuating the wheel brake modules in a fallback level, wherein the fallback level is designed in a two-circuit manner.
Claims22
A method for operating a brake system for a motor vehicle comprising:
- determining actuating information describing a brake demand by a brake actuating unit, wherein the brake demand can be detected by at least one front axle pedal sensor and one rear axle pedal sensor independently of each other;
- generating first font axle and rear axle brake torque demands corresponding to the actuating information with a central control electronics unit;
- generating second front axle brake torque demands corresponding to the actuating information by at least one front axle brake control unit which is assigned to wheel brake modules of a front axle, or which is assigned to two diagonally arranged wheel brake modules,
- generating second rear axle brake torque demands corresponding to the actuating information by at least one rear axle brake control unit which is assigned to wheel brake modules of a rear axle, or which is assigned to two other diagonally arranged wheel brake modules, and
- actuating the wheel brake modules of the brake system according to one of:
- a normal operating level with the first front axle and rear axle brake torque demands,
- a fallback level with the second front axle brake torque demands front axle, and
- a fallback level with the second rear axle brake torque demands.
The method as claimed in further comprising:
- switching between the normal operating level and the fallback level by a decision logic unit, wherein the decision logic unit integrated into one of the front axle and the rear axle brake control unit.
A brake system for a motor vehicle comprising:
- a plurality of front axle brake wheel brake modules;
- a plurality of rear axle wheel brake modules;
- a brake actuating unit for determining actuating information describing a brake demand, wherein the brake demand can be detected by at least one front axle pedal sensor and one rear axle pedal sensor independently of each other;
- an central control unit with instructions for generating first front axle and rear axle brake torque demands corresponding to the actuating information;
- at least one front axle brake control unit with instructions for generating second front axle brake torque demands corresponding to the actuating information by which is assigned to wheel brake modules of a front axle, or which is assigned to two diagonally arranged wheel brake modules,
- at least one rear axle brake control unit with instructions for generating second rear axle brake torque demands corresponding to the actuating information by which is assigned to wheel brake modules of a rear axle, or which is assigned to two other diagonally arranged wheel brake modules, and
- wherein the brake actuation unit actuates the plurality of front axle and rear axle wheel brake modules of the brake system according to one of:
- a normal operating level with the first front axle and rear axle brake torque demands,
- a fallback level with the second front axle brake torque demands front axle, and
- a fallback level with the second rear axle brake torque demands.
Dependencies are inferred from the claim text.