Steyr-Daimler-Puch Ag

Anton Dolenc

Tomas Visek

Harald Schmidt

Josef Morell

Leopold Rollenitz

Peter Forsthuber

A unit fuel injector of the type with an open injector comprises an injector body (,) with an axial space (,), which ends in an injector cap (,), an injection plunger (,) guided in the axial space and serving as a closing-off element, which injection plunger forms in the axial space a pressure space (,) from which the injection bores (,) of an upper row (,) and a lower row (,) extend. To allow the injector cross section to be adapted to all operating states, the injection plunger (,) has an axial bore (,), in which a coaxial plunger needle (,) is guided in the longitudinal direction of the injector, the needle part (,) of which needle interacts with a seat (,) formed by the interior of the injector cap (,) and arranged beneath the upper row of injection bores (,), and above the plunger part (,) of the plunger needle (,) there is provided a compression spring (,) acting on it in a downward direction, and the plunger needle forms beneath its plunger part (,) in the axial bore (,) a control chamber (,), which can be fed by a control medium which raises the plunger needle (,) against the force of the compression spring (,) with respect to the injection plunger (,).

Pump nozzle of a type with an open injection nozzle

Fuel injection pump unit with control and process for its calibration

A longitudinal housing wall for an internal combustion engine is formed with an elongate channel defined by two confronting parallel surfaces. A rod extends in said channel over at least two-thirds of the length of said channel and is coupled to said wall so as to be resiliently movable relative to said wall and capable of absorbing energy of flexural vibration at a predetermined frequency from said wall.

Longitudinal housing wall of an internal combustion engine

A method of adjusting a plurality of fuel injection units associated with respective cylinders of a multi-cylinder diesel engine having a crankshaft operatively connected to all said cylinders is provided. Each of said fuel injection units comprises a fuel injection nozzle, a fuel injection pump connected to said nozzle and operable to discharge fuel therethrough, drive means for driving said pump, a housing accommodating said nozzle, said pump and said drive means, a capacity control element for controlling the capacity of said pump, and a timing control element for controlling the time at which said pump begins to discharge fuel through said nozzle. Said method is carried out with the aid of first sensor means connected to said engine and adapted to generate output signals representing the pressure in each of said cylinders, second sensor means connected to said engine and adapted to generate output signals representing the rotational position of said crankshaft, and indicating means connected to said first and second sensor means to receive their output signals and adapted to indicate for each of said cylinders the peak value of said pressure and the rotational position of said crankshaft at which said pressure begins to rise as a result of said combustion. Each of said fuel injection units is mounted on and operatively connected to the associated cylinder of said engine, said engine is operated under idling conditions to effect a combustion of fuel in each of said cylinders and said first control element of each of said fuel injection units is adjusted so that the pressure in each of said cylinders rises to the same peak value as a result of said combustion. Said engine is subsequently operated to effect a combustion of fuel in each of said cylinders and said second control element of each of said fuel injection units is adjusted so that said pressure in each of said cylinder begins to rise when said crankshaft is in a predetermined rotational position desired for the beginning of said combustion.

Method of adjusting a plurality of fuel injection units associated with

A fuel injection nozzle for air-compressing, self-igniting reciprocating internal combustion engines, particularly for such engines arranged for a direct injection of fuel, comprises an axially slidable and axially guided, spring-biased valve needle for closing the nozzle orifices in the nozzle tip. Fuel is supplied to an annular chamber through a transverse bore and an axial bore of the valve needle to a plenum chamber, which is defined by the valve seat cooperating with the valve needle. Between the plenum chamber and the means for guiding the valve needle, the outside peripheral surface of the latter is surrounded by a clearance space, which is adapted to be flushed with fuel. In order to ensure a tight seal between the valve needle and the valve seat and to prevent a discharge of fuel during the closing operation of the valve needle, also to facilitate the flow of fuel through the nozzle orifices and to ensure a cooling action, the valve seat comprises a plurality of annular elevations, which surround respective inlet openings of the nozzle orifices and have inwardly facing surfaces which face and conform to adjacent surface portions of the end portion of the valve needle. The clearance space is directly or indirectly connected to the annular chamber regardless of the position of the valve needle.

Fuel injection nozzle for air-compressing, self-igniting reciprocating

A reciprocating-piston drive mechanism comprises a reciprocating-piston assembly defining a spherical socket and including a piston body. A connecting rod is arranged for pivoting movement in a plane and has a ball head fitted in the spherical socket. A coupling between the ball head and the piston assembly is arranged to transform the pivoting movement of the connecting rod and ball head into a reciprocating rotation of the piston body about its axis. The coupling includes a first coupling member attached to, and non-rotatable relative to, the piston body, and a second coupling member attached to, and carried by, the ball head, the second coupling member engaging the first coupling member.

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Vienna, Austria

Anton Dolenc