Robert Boschgmbh

Friedmann & Maier Aktiengesellschaft

Theodor Stipek

Gerhard Lehner

Stanislaw Bodzak

Hanspeter Mayer

Heinz Lauterbach

Jaroslaw Hlousek

Johann Warga

Georg Brasseur

Heinz Rathmayr

Christian Graspeuntner

Martin Bernhaupt

Helmut Tschoeke

Wolfgang Eckell

Richard Kinzel

Robert Reitsam

Johannes Schnedt

Anton Pischinger

Gottfried Kuehne

Bernd Harbig

Peter Herzog

Hans Schueler

A geared feed pump has a housing having a pump chamber in which a rotationally driven pair of gear wheels meshing with one another is disposed for pumping medium out of a suction chamber that communicates with a supply tank, along feed conduits, formed between the circumferential surface of the gear wheels and the circumferential walls of the pump chamber, into a pressure chamber. A drive shaft connected with one of the gear wheels via a coupling member is disposed inside the housing in a coupling chamber. The coupling chamber has a connection with the pressure chamber, so that lubrication of the coupling member is effected by the pumping medium.

Geared pump with forced lubricated coupling

A fuel supply device for an internal combustion engine has a supply container, at least one feed pump for supplying a fuel from the supply container, a high pressure pump to which the fuel is supplied from the supply container by the feed pump, so that the fuel is supplied under high pressure at least indirectly to injection points of an internal combustion engine, the feed pump being driven mechanically by the internal combustion engine, and a further feed pump provided additionally to the mechanically driven feed pump and supplying the fuel from the supply container to the high pressure pump, the further feed pump having an electric drive and being operable independently from the mechanically driven feed pump.

Fuel supply device for an internal combustion engine

The invention relates to a fuel feed pump for a fuel injection pump for internal combustion engines, having a pair of gear wheels that mesh with one another and are driven to rotate in a pump chamber. The pair of gear wheels pump fuel out of an intake chamber that communicates with a supply tank along a feed conduit, formed between the end face of the gear wheels and the circumferential wall of the pump chamber, into a pressure chamber that communicates with the fuel injection pump. One gear wheel is secured to a shaft is driven to rotate by means of a drive element that engages the shaft, wherein the drive element can be connected to the shaft by an overload safety device.

Fuel feed gear pump having an overload safety device

A fuel injection pump for internal combustion engines having a reciprocating pump piston and an annular slide displaceable on it, with a control bore that cooperates with a control recess on the pump piston, the recess communicates with a pump work chamber via a conduit. By means of location of control bores in the annular slide, the outflow stream is provided with the longest possible path until the outflow stream strikes the wall of the cylinder liner, in order to attain the freest and most unhindered possible stream course with reduced turbulence. Because the outflow stream strikes the hardened surface of the niche wall of the cylinder liner obliquely, cavitation damage is greatly attenuated or locally limited to sites of maximum resistance.

Fuel injection pump for internal combustion engines

An injection pump for internal combustion engines having a pump piston bushing, a pump piston, guided in the bushing, including control edges for controlling the beginning and end of an injection event. The control edges cooperate with control bores provided in the wall of the pump piston bushing that discharge into a reservoir chamber surrounding the pump piston bushing; fuel can be delivered into this chamber under pressure, and excess fuel, or fuel overflowing at the end of an injection event, can be diverted from it. For the fuel delivery, a suction valve opening to the reservoir chamber is connected to the reservoir chamber, while for the fuel diversion, a check valve in the form of a pressure maintenance valve that opens away from the reservoir chamber is connected to the reservoir chamber. This pressure maintenance valve may be preceded on the inlet side by a throttle restriction.

Injection pump for internal combustion engines

A fuel injection pump for internal combustion engines has a pump piston that is axially and rotationally movable in a cylinder and has a control edge and a diversion edge that defines a recess in the jacket face of the pump piston. To limit and adjust the effective supply stroke, the control edge and the diversion edge cooperate with a control opening in the cylinder, which opening communicates with a fuel-filled low-pressure chamber. To prevent cavitation damage during the diversion process, a pre-diversion groove, which extends approximately parallel to the diversion edge, is provided in the portion of the jacket face of the pump piston defined by the control edge and the diversion edge. It is disposed at a distance from the diversion edge such that immediately before the entry of the diversion edge into the control opening, representing the onset of diversion, it connects the pump work chamber, which is at high pressure, to the control opening.

An injection pump for internal combustion engines having a pump piston and a pump piston bushing, to which a suction chamber is connected, the connection of the suction chamber to the work chamber of the pump is overtaken by the pump piston upon supply onset, and in which a diversion of the pump pressure at the end of supply is effected by re-opening the communication with the suction chamber. At least one separate diversion chamber, defined by a pressure maintenance valve and a throttle is connected to the work chamber via a connection that is likewise openable and closable upon the compression stroke; this connection to the work chamber is opened earlier, at the end of pump supply, than a further connection to the suction chamber.

In a control equipment for adjusting the moment of fuel injection and/or the amount of fuel supplied by a fuel injection pump in internal combustion engines, at least one mechanical energy accumulator (9, 10) is provided between an adjusting member (2, 3) for the begin of fuel supply and/or for the amount of fuel supplied and an electrical servomotor (4), said energy accumulator comprising two mutually movable spring collars (12, 13) between which is accommodated a pre-stressed compression spring (11) and the maximum distance of which one from the other is limited by abutments (14, 15) of a housing surrounding the spring collars. (FIG. 1).

Control equipment for adjusting the moment of fuel injection and/or

In a process for controlling the beginning of delivery of a fuel injection pump for internal combustion engines having fuel injection, particularly Diesel engines, in dependence on the torque and under consideration of immediately measurable operation parameters, at least the revolution speed. The torque is determined from the intake boost pressure generated by a turbocharger and optionally from that amount of air which is blown off at increasing revolution speed above a certain intake boost pressure. A device for performing said process comprises a processor for performing at least one calculating operation provided with a store for storing the program to be executed, sensors transmitting signals to the processor representative of operation parameters of the injection-type internal combustion engine, and actuating means for controlling the beginning of fuel delivery of the fuel injection pump being connected with the processor. For determining the torque delivered by the engine there is provided a sensor for the intake boost pressure and a further sensor designed as pressure transducer for the differential pressure at a restriction for supplying to the processor a value corresponding to the air blown off.

Growing community of inventors

Hallein, Austria

Theodor Stipek