Daimler-benz Ag

Gunther Hafner

Ulrich Letsche

Karl-Ernst Noreikat

Bernhard Bauer

Hans-Dieter Schmidt

Wolfgang Rapp, Deceased

Hans-Josef Haepp

Victor Pfeffer

The invention relates to a fuel injection device for an air-compressing fuel-injected internal combustion engine, which has an injection line leading from a pump element of high pressure injection pump to a bifurcation branch leading to a main injection nozzle and a preinjection nozzle. A nozzle needle of the preinjection nozzle opens counter to the direction of flow of the fuel and has a body designed with a stepped piston which, in the case of a closure initiating fuel pressure lying above an opening fuel pressure of the nozzle needle, moves the nozzle into a position to end preinjection.

Fuel injection device for an internal combustion engine having

A method and system for determining optimum ignition times with regard to engine operation in which the engine is commanded, at regular, short-time intervals, to operate under conditions which cause knocking in order to be able to sense the knock limit. This is achieved, following the occurrence of a characteristic operating parameter in conjunction with a knock signal, at a frequency which is preferably significant, by storing an appropriately-corrected ignition-time value in a set of correction data, this ignition-time value lying somewhat beneath the knock limit. If the same characteristic operating parameter recurs, an optimum ignition time is accordingly indicated, which lies slightly beneath the knock limit. This procedure enables the engine to be operated under conditions which are optimum with regard to fuel consumption, without entering the knocking range with excessive frequency.

Procedure for determining optimum ingnition times with regard to engine

An injection nozzle for injecting fuel into the combustion chamber of an air-compressing internal combustion engine is provided, having a valve closing member which lifts inwards from its valve seat as a function of the fuel pressure. The valve closing member is formed by a diaphragm which is firmly clamped in the nozzle body and lifts to a greater extent during the opening pressure of the injected fuel in the direction of the spray openings. A dilatant liquid or a non-dilatant liquid with a certain portion of gas is used as a closing spring for the diaphragm.

Injection nozzle for injecting fuel into the combustion chamber of an

This invention relates to a hydraulic adjustment arrangement for the control of the injection start for a motor vehicle internal combustion engine, consisting of a primary part on the side of the internal-combustion engine and a secondary part on the side of the injection pump as well as radial pistons operating as a function of the admission of hydraulic oil, said radial pistons operating as a function of the admission of hydraulic oil, said radial pistons being guided in cylinders contained in the secondary part and interacting with levers extending in a circumferential direction and being pivoted on the secondary side, flexible connectors resting on said levers in one portion and fixed to the primary part on another portion, such that a radial movement of the pistons and as corresponding outward swivel movement of the levers and the flexible connectors causes a rotation of the secondary part relative to the primary part. A low-pressure hydraulic system is sufficient for the operation of the hydraulic adjusting device because the movement of the radial pistons is also supported by the centrifugal forces occurring with increasing speed of the internal-combustion engine.

Hydraulic adjusting arrangement for an injection pump

A control valve, in particular, an electrohydraulic control valve for controlling the injection pump of a diesel engine, incorporates a slider which is guided in a housing, in a manner permitting movement in the axial direction, the housing possessing radial flow-ports and, in the region of the inner peripheral surface, at least one annular space carrying a fluid. In order to ensure that the control-valve housing can be manufactured economically, the annular space is formed by a plurality of flow-ports which intersect in the region of the inner peripheral surface of the housing and pierce the housing radially.

Control valve, in particular an electrohydraulic control valve

A method and an apparatus for controlling the position of an actuator contemplates generating a signal indicative of actuator position, generating a signal indicative of desired actuator position, comparing the actuator position signal to the desired actuator position signal, and generating an error signal from the comparison. The error signal is provided to a control unit, and an adaptation signal is generated in an adaptive system. A control signal is provided by the control unit, and is combined with the adaptation signal to provide an adapted control signal. The adapted control signal is provided to the actuator to control it.

Method for controlling the position of an actuator in a manner whereby

A hydrostatic bladder-type storage means for storing mechanical energy by a compressible media in a pressure bottle. An interior of the pressure bottle contains an elastically resilient bladder accommodating the medium. The pressurized medium is introduced into the bladder from one side of the bottle, with the bladder being surrounded by hydraulic oil which is adapted to be forced into and removed from a cavity located between the bottle and the bladder. A porous elastic body of foamed synthetic resinous material is provided in the bladder with the medium filling pores of the foam body. The foam body is intimately joined to the wall of the bladder and has a specific thermal capacity which is greater than the thermal capacity of the medium.

Hydrostatic bladder-type storage means

A pump nozzle for an air-compressing injection internal combustion engine with a mechanically actuated pump piston and with an inlet bore connected with the pump working space, through which fuel is fed to a nozzle needle, as well as with a return bore for leakage oil and a control device influencing the fuel delivery; a valve which is actuated in the rhythm of the engine and which with an increasing fuel pressure separates the inlet line from the pump working space is arranged in the flow path of the inlet bore upstream of the pump working space, whereby the closing position of the valve is lifted by opening of a discharge bore leading to the return bore.

Pump nozzle for air-compressing injection internal combustion engine

An Otto internal combustion engine with a high-pressure metering system and with evaporation of the fuel that is heated electrically and/or by means of exhaust gas heat, by way of at least one expansion nozzle; the fuel in the operating phase of the engine is thereby adapted to be heated by means of exhaust gas heat at most to a base temperature lying below the desired design temperature to which the fuel is intended to be heated, and is adapted to be electrically heated from the base temperature to the desired temperature.

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Stuttgart, Germany

Gunther Hafner