Friedmann & Maier Aktiengesellschaft

Robert Boschgmbh

Voest-Alpine Automotive Gesellschaft M.b.h.

Mercedes-Benz Ag and Robert Bosch Gmbh

Heinz Rathmayr

Georg Brasseur

Kurt Oberklammer

Ulrich Augustin

Maximilian H Kronberger

Volker Schwarz

Theodor Stipek

Eugen Drummer

Gerhard Lehner

Heinz Popp

Peter Baumgartner

Peter Reisenbichler

Klaus Egger

Klaus-Juergen Thiele

Ekkehard Koehler

Peter Herzog

An injector with solenoid-valve control provided for diesel internal-combustion engines has a lateral fuel delivery conduit into a pressure accumulator reaching, on one hand, as far as the needle seat of a nozzle needle and on the other hand as far as a piston arranged on the rear side of the nozzle needle. A control space in the injector is connected by a controllable solenoid valve to the pressure accumulator or, for pressure relief, to a low-pressure conduit. A fuel filter is arranged in the pressure accumulator in the mouth region of the fuel delivery conduit.

Injector with solenoid-valve control for fuel injection into diesel

The invention relates to a fuel injection pump for internal combustion engines, having a pump piston guided in a cylinder bore of a pump body, which pump piston defines a pump work chamber in the cylinder bore and which is axially driven by a cam drive counter to the force of a restoring spring. Each individual cylinder of the engine to be fed is assigned a fuel injection pump, which is inserted into a bore in the engine housing; at the same time, the engine housing serves as the pump housing. In order to limit frictional wear, which is caused by the back-and-forth motion of the roller tappet of the cam drive guided in the engine housing and to easily replace pump parts, a thin-walled slide bush is disposed between the roller tappet and the housing bore. The slide bush is fastened with radial play on the pump body and additionally prevents the roller tappet from slipping out and prevents the preassembled fuel injection pump from falling apart when it is not installed in the housing bore.

Fuel injection pump for internal combustion engines

The invention sets forth a fuel injection pump inserted into a housing of an internal combustion engine and comprising a single pump element that supplies a cylinder of the engine with fuel. The pump element comprises a pump body, which has a cylinder bore in which a pump piston, which defines a pump work chamber in the cylinder bore is axially guided and is moved back and forth by a cam drive counter to the force of a restoring spring. For simple manufacture of the pump body with great strength and tightness, this pump body is divided into a rotationally symmetrical cylinder liner and a rotationally symmetrical intermediate part, which are axially braced in line with a magnet valve via a resilient sleeve.

A pump nozzle for a diesel engine, in which an injection pump element including a pump piston driven by a cam-shaft via a thrust element and a pump element bushing is combined with an injection nozzle to provide a unit to be associated to one motor cylinder. The pump piston is surrounded by a control sleeve which is non-rotatable relative to the pump element busing. The pump piston can be rotated for adjusting its orientation relative to the control sleeve for the purpose of adjusting the supplied amount of fuel. An adjuster for adjusting the amount is disposed at substantially the same level as of the thrust element. The control sleeve is arranged completely within a pump spring, which partly surrounds the pump element bushing. The pump dement bushing is formed integrally with a blind longitudinal bore which receives the pump piston. The pump spring extends from the level of the adjuster for adjusting the amount of fuel to be injected per injection, to the level of the working chamber of the pump piston. This provides an overlapping arrangement of the separate parts of the pump nozzle, so that the structural dimensions of the pump nozzle may be kept small.

Pump nozzle for diesel engines

In a pump nozzle for Diesel engines, in which an injection pump element comprising a pump piston (1) driven by a cam shaft and a pump element bushing (11) is combined with an injection nozzle (8) to form a unit associated to one motor cylinder each, the pump piston (1) is surrounded by a control sleeve (12) which can, for the purpose of varying the begin of fuel injection, be shifted in direction of the axis of the pump piston (1) in dependence on operating parameters of the motor, noting that the pump piston (1) is rotatable relative to the control sleeve (12) for the purpose of adjusting the supplied amount of fuel. The control sleeve (12) is connected with a separating sleeve (17) surrounding said control sleeve (12) and being guided at both sides of the control sleeve (12) with its inner side for being axially shiftable on the pump element bushing (11). The separating sleeve (17) has at its end located opposite the injection nozzle (8) a hook-like protrusion (21) sensing a surface (23) extending in transverse relation to the axis and being inclined relative to a normal plane extending in normal relation to the axis and being shiftable in parallel relating to this normal plane in direction of its inclination, noting that the adjusting force causing the axial adjusting movement of the control sleeve (12) acts on the inclined surface (23) and shifts same in the direction of its inclination.

For shutting down a fuel injection combustion there is provided a spring-loaded and lockable stop (8), the locking member (13) of which can be retracted in a controlled manner by an operation paramenter, e.g. the number of revolutions. In the released position, the stop (8) acts on the fuel amount control rod (1) and moves this rod into zero-delivery position. Adjustment of the fuel amount control-rod (1) is effected by means of a servomotor, noting that on starting the fuel injection combustion engine the stop (8) is drawn by this servomotor into a position in which the stop is maintained by the locking member (13) until retracting same. This locking position of the lockable stop (8) simultaneously represents a stop for the maximum amount of fuel supplied by the injection pump and the fuel amount control rod can, during operation, be adjusted to any desired and just required amount of fuel supplied. If there occurs an inadmissible operating condition, e.g. an overspeed, the lockable stop (8) is released and can, with the aid of the force of the pretensioned shutdown spring, retract the control rod (1) into zero-delivery position out of any position of the control rod.

Device for shutting down a fuel injection combustion engine

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

The fuel injection device is designed as a compact module. The fuel is to be supplied through a bore of the housing of the fuel injection internal combustion engine. For accommodating the fuel filter in a protected manner without detracting from the mechanical strength of the housing, the fuel supply conduit opens into a space located at the side of the flange directed toward the nozzle, noting that the flange has at least one axial opening connecting the space located at the side of the flange directed toward the nozzle with the suction space of the pump piston. The fuel filter is arranged between the space located at the side of the flange directed toward the nozzle and the suction space.

Fuel injection device for fuel injection internal combustion engines

The invention relates to a fuel injection device comprising an injection pump and an injection nozzle, the nozzle having a spring-loaded control pin and being assembled together with the pump to form a unit insertable into the wall of a cylinder of an injection type internal combustion engine. The device includes a pump piston, a piston sleeve and a pump housing, the housing enclosing the piston sleeve, the return spring action on the piston, and the regulating jacket acting on the piston. The housing is attachable to the engine housing by tightening screws having axes parallel to the piston sleeve, and the said injection nozzle is tightened by a sleeve nut to an element of the piston sleeve.

Growing community of inventors

Hallein, Austria

Heinz Rathmayr