초록 ▼

The invention relates to a hydraulic vehicle brake system with a master cylinder, with two brake circuits (I, II), with wheel brakes connected to the brake circuits (I, II), and with a wheel slip regulator device disposed between the master cylinder and the wheel brakes, which device has at least on

The invention relates to a hydraulic vehicle brake system with a master cylinder, with two brake circuits (I, II), with wheel brakes connected to the brake circuits (I, II), and with a wheel slip regulator device disposed between the master cylinder and the wheel brakes, which device has at least one brake pressure modulation valve device and at least one high pressure pump, and with a pump unit associated with this high pressure pump. In the automatic braking operation by means of at least one of the high pressure pumps, the pump unit is used for supplying hydraulic fluid to the high pressure pump. The pump unit has a low pressure pump in the form of a gear pump. To limit the pressure at an outlet of the low pressure pump at least one return flow conduit is provided between this outlet and an inlet, which conduit, in a manner according to the invention constitutes a throttle by which the choice of its cross section, which throttle is for controlling at least one return flow which increases with increasing pressure at the outlet and as a result achieves the pressure limiting. The hydraulic vehicle brake system can be used for cars, minibuses, and small trucks.

대표청구항 ▼

[ What is claimed and desired to be secured by Letters Patent of the United States is:] [1.] A hydraulic vehicle brake system with a wheel slip regulator device that counters a danger of wheel locking when braking and is for automatic braking, wherein the wheel slip regulator device is disposed betw

[ What is claimed and desired to be secured by Letters Patent of the United States is:] [1.] A hydraulic vehicle brake system with a wheel slip regulator device that counters a danger of wheel locking when braking and is for automatic braking, wherein the wheel slip regulator device is disposed between a master cylinder and at least one wheel brake, and comprises at least one high pressure pump, at least one brake pressure modulation valve device, and for the purpose of supplying the at least one high pressure pump with hydraulic fluid during automatic braking operation, has a reservoir connected to a pump unit with a low pressure pump that has a toothed element, and a motor that drives the low pressure pump, the low pressure pump (71) has a housing (102), an inlet (72), and an outlet (73) and that inside the housing (102, 103), there is at least one return flow conduit (74) that connects the outlet (73) to inlet (72) and a cross section of the return flow conduit is dimensioned to function as at least one throttle (75), that when the outflow of hydraulic fluid from the outlet (73) of the low pressure pump (71) is prevented and when there is a predetermined viscosity of the hydraulic fluid as well as a predetermined drive speed of the low pressure pump (71) by means of hydraulic fluid flow determined by the at least one throttle (75), a pressure limitation to a desired value takes place, and the housing (102) is associated with a housing cover (103) which has a projection (119) oriented toward the motor (70).