Robert Boschgmbh

Alexander Clemens

Johann Warga

Peter Schueler

Karl Reiff

The housing, which is closed at the side, of the fuel injection pump embodied as in-line injection pump has receiving bores, discharging into a camshaft chamber, for in-line tappets and pump elements, the pump pistons of which are rotatable in order to vary the effective supply stroke by means of regulating sleeves provided with guide arms. A governor rod guided in a longitudinal recess of the pump housing engages the guide arms. For the removal and installation of the regulating sleeves, assembly recesses are machined into the receiving bores, beginning at the camshaft chamber and discharging into the longitudinal recess. The assembly recesses, one for each two adjacent receiving bores, are each embodied by means of a single aperture which interrupts the web of housing between the receiving bores. The resultant assembly recesses are located in the unloaded region between the tappets and enable an equally high peak load on the injection pump in both clockwise and counterclockwise operation.

Multi-cylinder fuel injection pump for internal combustion engines

A control device for Diesel engines is proposed in which a rapid shutoff of the engine can be effected by evacuating the suction chamber of the injection pump. The control device includes a supply pump and a reversal valve, which in a stop position connects the suction chamber with the intake side of the supply pump and connects the compression side of the supply pump with the fuel tank. A check valve is provided in the supply line between the supply pump and the fuel filter which, when closed, is vacuum-tight; this check valve is disposed to open toward the filter, counter to the force of a valve closing spring. Another check valve, comprising an overflow valve determining the suction chamber pressure, is provided in an overflow line leading from the suction chamber to the fuel tank; this overflow valve is also vacuum-tight when closed. When the reversal valve is actuated by an electromagnet, a similar key-actuated shutoff to that known in gasoline engines can also be effected in Diesel engines. The circuitry of this embodiment also enables an involuntary 'rolling start' to be blocked, and allows for a fail-safe shutoff of the engine in case of a malfunction in the governor shutoff device.

Growing community of inventors

Stuttgart, Germany

Alexander Clemens