Control device for a vehicle brake system and method for operating a vehicle brake system
AssigneeRobert Bosch GmbH
InventorsStefan Strengert, Michael Kunz
Life of this patent
Estimating the term…
Abstract
A control device for a brake system of a vehicle includes a valve control device, using which, while taking into account a provided information signal with respect to a currently exerted or to be exerted generator braking torque of a generator, at least one high-pressure switching valve of a brake circuit of the brake system is able to be controlled into an at least partially opened state such that a brake fluid volume is able to be displaced from a main brake cylinder of the brake system into a storage chamber of the brake circuit via the at least one high-pressure switching valve that has been controlled into the at least partially opened state. Furthermore, a method for operating a brake system of a vehicle is described.
Claims13
A brake system for a vehicle, comprising:
- a master brake cylinder;
- a brake circuit with two wheel brake calipers, two wheel outlet valves, an accumulator chamber, a high-pressure switching valve, and a pump, wherein an intake side of the pump is hydraulically connected via a first branching line to the two wheel output valves, and the high-pressure switching valve is hydraulically connected via a second line to a branching point which is formed in the first line;
- a control device for a brake system of a vehicle, comprising:
- a valve control device adapted to control, while taking into account a provided information signal relating to a currently carried out or to be carried out generator braking torque of a generator, the high-pressure switching valve into an at least partially opened state such that a brake fluid volume is shifted from the master brake cylinder into the accumulator chamber via the at least one high-pressure switching valve that has been controlled into the at least partially opened state;
- wherein the accumulator chamber is a low-pressure accumulator chamber which is connected to the first line, the first line being without a check valve, and the low-pressure accumulator chamber being connected to the first line in such a way that the brake fluid volume is transferred into the low-pressure accumulator chamber by bypassing the two wheel brake calipers.
A method for operating a brake system of a vehicle, the brake system a master brake cylinder and a brake circuit with two wheel brake calipers, two wheel outlet valves, an accumulator chamber, a high-pressure switching valve and a pump, wherein an intake side of the pump is hydraulically connected via a first branching line to the two wheel outlet valves, and the high-pressure switching valve, and the high-pressure switching valve is hydraulically connected via a second line to a branching point which is formed in the first line, the method comprising:
- comparing a braking torque variable relating to a currently exerted or to be exerted generator braking torque of a generator to a comparative variable relating to a least generator braking torque;
- provided the braking torque variable is greater than the comparative variable, controlling the high-pressure switching valve into an at least partially opened state such that a brake fluid volume is able to be displaced from the master brake cylinder into the accumulator chamber via the high-pressure switching valve that has been controlled into the at least partially opened state;
- and
- transferring the brake fluid volume through the first line, which is without a check valve, into the accumulator chamber, by bypassing the two wheel brake calipers, the accumulator chamber being embodied as a low-pressure accumulator chamber.
Dependencies are inferred from the claim text.