초록 ▼

To prevent difficulties in a brake system which is appropriate for automatic braking operations when the viscosity of the pressure fluid is high at low temperatures, a precharging pump for the pressure fluid supply during automatic braking is located so that it aspirates pressure fluid from the supp

To prevent difficulties in a brake system which is appropriate for automatic braking operations when the viscosity of the pressure fluid is high at low temperatures, a precharging pump for the pressure fluid supply during automatic braking is located so that it aspirates pressure fluid from the supply reservoir and delivers it into the brake line at a junction point as far from the master cylinder as possible. This junction point should be as close as possible to the suction side of the return pump. The large distance between the master cylinder and the point where the pressure line opens into the brake line makes it unnecessary to provide additional throttle elements in the brake line in order to reliably prevent pressure fluid from discharging into the supply reservoir. Only when the change-over valve on the suction side of the return pump is closed after an automatic braking operation has ended will it be necessary to reduce the residual pressure because the precharging pump continues running. This reduction in residual pressure takes place automatically in the brake system of the present invention because the pressure fluid connection to the master cylinder and, thus, to the supply reservoir is open.

대표청구항 ▼

[ What is claimed is:] [1.] A hydraulic automotive vehicle brake system comprising:a pedal-operated master cylinder connected to a supply reservoir; at least one brake circuit including at least one brake wheel, wherein at least one wheel brake is connected to the master cylinder by way of a brake l

[ What is claimed is:] [1.] A hydraulic automotive vehicle brake system comprising:a pedal-operated master cylinder connected to a supply reservoir; at least one brake circuit including at least one brake wheel, wherein at least one wheel brake is connected to the master cylinder by way of a brake line; a return pump for each brake circuit with a suction side and a pressure side which returns pressure fluid discharged from the wheel brake in an anti-lock control operation into the brake line; and a precharging pump with a suction side and a pressure side which generates a pilot pressure on the suction side of the return pump during automatic braking operations, wherein the pressure side of the precharging pump includes a pressure line means for connecting the pressure line to the master cylinder without any intervening valve components positioned therebetween, wherein the pressure line means is hydraulically coupled into the brake line at a junction point that is so remote from the master cylinder that a sufficient pilot pressure for the return pump develops due to throttling effects which are caused in the brake line between the junction point and the master cylinder.