摘要:
The invention relates to a method for operating a braking system (1) for motor vehicles with electrically actuated hydraulic valves (V1 bis V8), the coils of which are powered up, at least in phases, with currents which modify the currentless state of the hydraulic valves (V1 to V8), in order to heat the hydraulic fluid present in the hydraulic system of the braking system (1). According to the invention, the hydraulic fluid is heated via a heating profile which, in accordance with the hydraulic fluid temperature, activates the heating phase of the hydraulic fluid. The heating profile consists of a first heating phase and, subsequent thereto, a second heating phase. During the first heating phase, the coils are powered up in such a way that the coil temperature at the end of the first heating phase corresponds to a pre-defined temperature value of the coil which is at least approximately maintained during the second heating phase when powering up the coils.
摘要:
The invention relates to a method of calibrating a pneumatic brake booster for a motor vehicle braking circuit. According to the invention, for a given value of negative pressure (Pfc) in the vacuum chamber of a booster, the value of the outlet pressure (Pmc) of the hydraulic master cylinder which is connected to said booster and the value of the negative pressure in the working chamber of the booster are measured and recorded for several booster operating points P1, P2, P3, P4 located on either side of the saturation point. In this way, the co-ordinates of the saturation point can be accurately determined in order to control precisely the advanced features of the booster, namely braking, brake assist and/or operation and ageing monitoring.
摘要:
The invention relates to a braking system for a vehicle having a primary brake cylinder (14) that is coupled to a brake input element (10) such that a braking pressure and/or activation path signal can be provided unreinforced to the primary brake cylinder (14) and a corresponding unreinforced pressure signal can be output by the primary brake cylinder (14), a brake circuit (24) having a separator (66) switchable into an open mode and into a closed mode and at least one wheel brake cylinder (68a, 68b) arranged on a wheel (26a, 26b), wherein the unreinforced pressure signal can be forwarded to the first wheel brake cylinder (68a, 68b) in an open mode of the separator and a forwarding of the unreinforced pressure signal can be prevented by the separator (66) switched to the closed mode, and a hydraulic assembly (76, 80) coupled to the first wheel brake cylinder (68a, 68b) that is designed to output a reinforcement pressure signal. The invention further relates to a method for operating a braking system for a vehicle and to a production method for a braking system for a vehicle.
摘要:
The invention relates to a braking device for a motor vehicle, comprising a first and a second group of brake circuits (1, 2), wherein every brake circuit is associated with a group of wheels (3, 4, 5, 6) and wherein at least the first group of brake circuits is designed as hydraulic brake circuits, at least one group of wheels (5, 6) being connected to at least one effective unit (20) that is capable of causing a deceleration of the wheels. The aim of the invention is to conveniently combine recuperative braking operations with conventional braking operations. A control device (22) controls the brake effect of the one or more brake circuits (2) of the second group as well as optionally the decelerating effect of the one or more effective units, the first group of brake circuits being actuatable directly by the driver by means of a brake actuation device.
摘要:
The invention relates to a brake device and a hydraulic device for motor vehicles, comprising at least two hydraulic brake circuits (1, 2), which are directly connected to a master brake cylinder (9), and comprising a further brake circuit (3), which can be actuated via a control unit (22) independently from the master brake cylinder. Due to the separate hydraulic brake circuits (1, 2) in the region of the front axle, the required redundancy is provided, while the third brake circuit (3), which can be actuated independently of the master brake cylinder and typically acts on the rear wheels, during automatic actuation allows the consideration of a braking effect by additional units (20), such as a driven generator.