Brake system for a vehicle and method for operating a brake system of a vehicle

摘要

A vehicle brake system and method for operating same, having a master brake cylinder, a brake medium reservoir, and a first brake circuit, connected via a reservoir line to the brake reservoir, having at least one first wheel brake cylinder, a first wheel inlet valve associated with the first brake cylinder, a first pump, by which a first brake medium volume is pumpable from the reservoir line through the open first wheel inlet valve into the first brake cylinder, a continuously adjustable first wheel outlet valve, by which a first brake medium displacement from the first cylinder into the brake reservoir is controllable, and a connecting line having a spring-loaded non-return valve, via which a delivery side of the first pump is connected to the brake reservoir, a brake medium displacement from the brake reservoir to the delivery side of the first pump being prevented by the spring-loaded non-return valve.

主权项

1. A brake system for a vehicle, comprising:
a master brake cylinder; a brake medium reservoir; and a first brake circuit, which is connected via a reservoir line to the brake medium reservoir, including at least one first wheel brake cylinder, a first wheel inlet valve associated with the first wheel brake cylinder, a first pump, and a first wheel outlet valve associated with the first wheel brake cylinder,
wherein, using the first pump, a first brake medium volume is able to be pumped from the reservoir line through the open first wheel inlet valve into the first wheel brake cylinder,wherein the first wheel outlet valve is a continuously adjustable first wheel outlet valve, by which a first brake medium displacement from the first wheel brake cylinder into the brake medium reservoir is controllable;a connecting line having a non-return valve, via which a delivery side of the first pump is connected to the brake medium reservoir, wherein a brake medium displacement from the brake medium reservoir to the delivery side of the first pump is prevented by the non-return valve;the first brake circuit includes a second wheel brake cylinder having an associated second wheel inlet valve and a continuously adjustable second wheel outlet valve, wherein a second brake medium volume is able to be pumped by the first pump from the reservoir line through the open second wheel inlet valve into the second wheel brake cylinder;a second brake medium displacement from the second wheel brake cylinder into the brake medium reservoir is controllable using the continuously adjustable second wheel outlet valve;the control device of the brake system is configured to receive a setpoint difference, specified by a vehicle component, of a hydraulic sum braking torque made up of a first hydraulic braking torque exertable by the first wheel brake cylinder on the first wheel and a second hydraulic braking torque exertable by the second wheel brake cylinder on the second wheel of the vehicle, and, if the first wheel inlet valve is in an open state, to control the first wheel outlet valve so that the first hydraulic braking torque is modifiable by the setpoint difference, and, if the first wheel inlet valve is in a closed state and the second wheel inlet valve is in an open state, to control the second wheel outlet valve so that the second hydraulic braking torque is modifiable by the setpoint difference;a value of the setpoint difference is determined based a change in a force applied by at least one of the first wheel brake cylinder and the second wheel brake cylinder; andthe change in the force is caused by one of a recuperative braking device and a transverse acceleration-dependent distribution of brake force.