Abstract: The invention relates to a check valve with a spherical valve element whose service life and operating reliability is considerably increased in relation to conventional check valves. The improved check valve is used in an injector for a fuel injection system of an internal combustion engine, having a hydraulic pressure booster.

Abstract: A steering system for a vehicle, having a steering wheel, a steering gear and a steering module, disposed between them, for superimposed steering engagement by a controlled electric motor. The electric motor has an input shaft connected to the steering wheel and an output shaft connected to the steering gear. For the sake of structurally simplifying the steering module, the electric motor is in direct engagement, in line with a clutch that can be engaged and disengaged, with the input shaft via a first gear, and the electric motor is in direct engagement with the output shaft via a second gear.

Abstract: The brake system has at least one brake circuit (I), in which a high-pressure pump is disposed. A self-aspirating charge pump is also provided, which is connected at least indirectly to the intake side of the high-pressure pump by an intake line of a supply container for brake fluid and by a pressure line. In the event of an inadequate supply of brake fluid by the charge pump, the pumping of air into the brake circuit (I) is intended to be precluded. To that end, a siphon is disposed in the intake line of the charge pump. Air aspirated by the siphon suddenly prevents pumping by the charge pump. The brake system is intended for use in motor vehicles with slip control or for automatic brakes.