Patent ID: 11970145
Assignee: ROBERT BOSCH GMBH
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 4:
5. A method for operating a brake system of a two-axle vehicle comprising a master brake cylinder, a brake actuating element being connected to the master brake cylinder, and at least one brake circuit connected to the master brake cylinder, each of the at least one brake circuit having a respective front wheel brake cylinder, a respective rear wheel brake cylinder, a respective front wheel inlet valve associated with the respective front wheel brake cylinder, a respective front wheel outlet valve associated with the respective front wheel brake cylinder, a respective rear wheel inlet valve associated with the respective rear wheel brake cylinder, a respective rear wheel outlet valve associated with the respective rear wheel brake cylinder, and a respective accumulator chamber disposed downstream of the respective front wheel outlet valve and the respective rear wheel outlet valve, the method comprising the following steps:
detecting a target vehicle deceleration unequal to zero input by a driver of the vehicle by actuating the brake actuating element;
based on the detecting, checking whether a generator operation of at least one electric motor of the vehicle is able to effect that a recuperative vehicle deceleration equals the input target vehicle deceleration;
optionally, opening the respective rear wheel outlet valve to displace a brake fluid pressed out of the master brake cylinder via the respective rear wheel outlet valve into the respectively downstream disposed accumulator chamber; and
keeping open or opening the respective front wheel inlet valve when the respective front wheel outlet valve is kept closed or closed, so that a brake pressure prevailing in the respective front wheel brake cylinder is increased and limited to an accumulator chamber pressure actively prevailing in the respective accumulator chamber of the same brake circuit.