Installation for charging a pressure reservoir provided as a pressure source within a propulsion control system of a motor vehicle

An installation for charging a pressure reservoir means which is provided as a pressure source in a propulsion control means of a motor vehicle, pressure being applied during control phases of the propulsion control means from said reservoir means to wheel brake means of the wheel which, at the instant in question, is tending to spin, an anti-blocking means in the vehicle having hydraulic control means for regulating the brake pressures at the wheel brake means, said hydraulic control means including brake-pressure regulating valve means individually coordinated to the wheel brake means and operable to be shifted into a pressure build-up position, a pressure-holding position, or a pressure-reduction position, a return pump means activated at least during the control phases in which pressure reduction occurs, electronic control means for shifting the brake-pressure regulating valve means in the sense of effecting propulsion control, the return pump means, activated during the pressure-reduction phases of the propulsion control, being also operable to recharge the pressure reservoir means, characterized in that the pressure reservoir means is a high-pressure reservoir which can be charged to a pressure of about 160-200 bar required for the pressure actuation of the wheel brake means, a master brake cylinder means having an outlet pressure chamber means, solenoid valve means operable to connect in the normal position thereof the outlet pressure chamber means with a brake line means leading to the brake-pressure regulating valve means of the driven wheels, the pressure reservoir means being operatively connected to said brake line means, instead of the connection of the master brake cylinder means to said brake line means, upon energization of said solenoid valve means, which is logically linked to activation of the propulsion control means, so that the reservoir means can be charged by the return pump means also operatively connected on its outlet side to said brake line means, and in that a pressure monitor means is provided responding to the pressure in the reservoir means and generating an electrical output signal operable to trigger an operation to charge the pressure reservoir means when the pressure therein drops below a minimum intended value.