Brake actuating unit for actuating an automotive braking system
A technology of brake operation unit and brake system, which is applied in the direction of hydraulic brake transmission device, brake, foot start device, etc., and can solve problems such as danger
Inactive Publication Date: 2008-01-30
CONTINENTAL TEVES AG & CO OHG
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Problems solved by technology
[0008] Potentially dangerous (crushing hazard) due to simultaneous maintenance work on the brake system, e.g. active pressure generation when parking without actuating the brake pedal for the detection of simulator shutdown )
Method used
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[0025] DE 10 2004 011 622 A1 mentioned at the outset of the description discloses the construction of the aforementioned brake actuating unit for operating a brake system of the "brake-by-wire" type of motor vehicle. Therefore, only a partial sectional view of a brake booster is shown in the figure, said booster is preferably a low-pressure brake booster 1 , the control valve 2 of which can be controlled by means of a brake pedal 3 on the one hand. The driver actuation, on the other hand, can be actuated independently of the driver's intentions by means of the electromagnet 10 . The travel of the movable wall of the brake booster 1 is measured by means of a displacement sensor (BWS), while the driver's deceleration intention is detected by means of a sensor system (PAS). Displacement sensors and sensor arrangements are not shown in the figures since they are fully disclosed in the aforementioned publications. Especially in the "brake-by-wire" mode of operation, a pedal travel...
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The invention relates to a brake actuating unit for actuating an automotive braking system of the brake-by-wire type. Said unit comprises a) a brake booster, which can be actuated according to the driver's wishes both by means of a brake pedal as well as by means of an electronic control unit, whereby means are provided for decoupling a force-transmitting connection between the brake pedal and the brake booster in the brake-by-wire operating mode; b) a master cylinder connected downstream from the brake booster; c) means for detecting the driver's wish to slow down, and; d) a pedal travel simulator, which interacts with the brake pedal and with which, in the brake-by-wire operating mode, a restoring force acting upon the brake pedal can be simulated independent of an actuation of the brake booster, and which, in the brake-by-wire operating mode, can be switched on when decoupling the force-transmitting connection between the brake pedal and the brake booster and can be switched off when the brake-by-wire operating mode is not active; whereby e) a mechanical connection between the brake booster and the brake pedal is provided and allows a transmission of the tensile force supplied by the brake booster to the brake pedal, and which is configured by two elements of an actuating rod actuating the control valve of the brake booster, which are capable of making a relative movement in relation to each other, whereby the first element is connected to the valve piston of the control valve and the second element is connected to the brake pedal in a force-transmitting manner. The aim of the invention is to eliminate the risk of injuries involved during inspection of a simulator shut-down and simultaneous maintenance work on the braking system. For this purpose, an elastic element (11) is interposed between the two elements (8, 9) and is compressed by the electronic control unit when the brake booster (1) is actuated independent of the driver's wish.
Description
technical field [0001] The invention relates to a brake operating unit for operating a brake system of a motor vehicle of the "brake-by-wire" type, the brake operating unit comprising [0002] a) The brake booster, which can be operated according to the driver's intention, either by means of the accelerator pedal or by means of the electronic control unit, wherein there is a device for connecting the brake pedal and the brake booster in the "brake-by-wire" mode of operation means of disengaging the connection between the transmission of force, [0003] b) the master brake cylinder arranged downstream of the brake booster, [0004] c) means for obtaining the driver's deceleration intention, and [0005] d) a pedal travel simulator acting in conjunction with the brake pedal, with which the restoring force acting on the brake pedal can be simulated independently of the operation of the brake booster in the "brake-by-wire" mode of operation, and in In the "brake-by-wire" operat...
Claims
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IPC IPC(8): B60T8/40B60T7/04B60T11/18
Inventor J·舍恩尔奥M·吕费尔H·克兰里奇T·奎塞尔H·冯汉W·里特尔
Owner CONTINENTAL TEVES AG & CO OHG