Arrangement for preventing a vehicle from rolling away
AssigneeMercedes-Benz AG
InventorGernot Spiegelberg
Life of this patent
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Abstract
This invention relates to an arrangement for preventing unintended rolling of a vehicle. If, in the case of a vehicle which is parked properly (with the parking brake activated), it is determined that the parking brake is released, a brake pressure is generated which ensures the stoppage of the vehicle. For this purpose, a control device actuates relay valves to establish a fluid connection between a pressure accumulator and the wheel brakes. The fluid connection is maintained until a brake pressure is applied by the wheel brake cylinders which ensures the stoppage of the vehicle.
Claims9
Arrangement for preventing unintended rolling of a vehicle having a braking system with a brake pedal, wheel brake cylinders and a parking brake, said arrangement comprising:
- a pressure accumulator;
- a control device, energized independently of a switch position of a vehicle ignition switch, for controlling a build-up and reduction of brake pressure in said wheel brake cylinders;
- means for detecting actuation of said parking brake, and for transmitting a signal indicative thereof to said control device;
- at least one relay valve for interruptibly connecting said wheel brake cylinders with said pressure accumulator;
- wherein said control device includes means responsive to absence of said signal indicative of actuation of said parking brake, for actuating said at least one relay valve to connect said wheel brake cylinders with the pressure accumulator, whereby brake pressure is built-up in the wheel brake cylinders from the pressure in the accumulator, ensuring stoppage of the vehicle.
Arrangement for preventing unintended rolling of a vehicle having a braking system with a brake pedal, wheel brake cylinders and a parking brake, said arrangement comprising:
- a pressure accumulator;
- a control device, energized independently of a switch position of a vehicle ignition switch, for controlling a build-up and reduction of brake pressure in said wheel brake cylinders;
- means for detecting actuation of said parking brake, and for transmitting a signal indicative thereof to said control device;
- at least one relay valve for interruptibly connecting said wheel brake cylinders with said pressure accumulator;
- wherein said control device includes means responsive to absence of said signal indicative of actuation of said parking brake, for actuating said at least one relay valve to communicate pressure from the pressure accumulator to the wheel brake cylinders, whereby brake pressure is built-up in the wheel brake cylinders from the pressure in the accumulator, ensuring stopping of the vehicle.
Dependencies are inferred from the claim text.