Robert Boschgmbh

Fuji Photo Film Company, Limited

Hermann Grieshaber

Wilhelm Polach

Ulrich Flaig

Gerhard Engel

Manfred Birk

Hermann Kull

Wolf Wessel

Helmut Laufer

Johannes Locher

Ewald Eblen

Josef Wahl

Alfred Schmitt

Joachim Tauscher

Pierre Lauvin

Alf Loffler

Hans-Joachim Siebert

Gerhard Stumpp

Heribert Haerle

Norbert Meissner

Konrad Eckert

Thomas Bleile

Albrecht Sieber

Horst Harndorf

Bernhard Kamp

Fridolin Piwonka

Anton Karle

Siegfried Holzbaur

Walter Egler

Peter Schueler

Klaus Krieger

Werner Zimmermann

Guenter Veit

Bernhard Bronkal

Wolfram Gerwing

Jurgen Wietelmann

Bernhard Schenk

Thomas Becker

Benedikt Kraus

Thilo Schedler

Uwe Altmann

Helmut Steimer

J/u/ Rgen Wietelmann

Miguel Granda

A method for controlling a common rail injection system for turbochargeable internal combustion engines, in particular diesel engines, in which in a first steady-state or quasi-steady state load condition of the internal combustion engine, a rail pressure is established as a function of the injection volume in accordance with a first characteristic curve, the rail pressure being established in a second, non-steady-state load condition of the internal combustion engine, in particular at non-steady-state full load, as a function of the injection volume in accordance with a second characteristic curve, the rail pressure in the case of the non-steady-state load condition being elevated in each case with respect to the rail pressure in the presence of the steady-state or quasi-steady-state load condition, with an identical injection volume.

Method for controlling a common rail injection system

A method and apparatus for injecting fuel into combustion chambers of an internal combustion engine, in which the total injection quantity for the engine is split into a main injection quantity and a small postinjection quantity, the latter being closely coupled to the end of the main injection quantity and being injected with the same fuel pressure as the main injection quantity. This reduces soot emissions at otherwise identical engine operating parameters. Because of the interaction among soot emissions, NO.sub.x emissions and specific consumption, the postinjection, while soot and NO.sub.x emissions are kept the same, can also be employed to lower the specific consumption of the engine.

Method for injecting fuel into the combustion chambers of an

A fuel injection system with an injector for an internal combustion engine has a binary injection nozzle whose pressure chamber can be alternatingly supplied with fuel and a supplemental fluid. A valve device is provided which can control the high-pressure side fuel delivery to the binary injection nozzle and the connection of the pressure chamber to a low-pressure side and to a supply line of the supplemental fluid. The valve device has a reversing valve that is embodied for controlling the impingement of high or low pressure on the pressure chamber and is also embodied for controlling the filling of the pressure chamber with the supplemental fluid. Therefore, the valve device is improved with regard to more rapid and precise switching operations and is also simplified, resulting in greater reliability and reduced maintenance.

Fuel injection system for an internal combustion engine

A method for controlling an internal combustion engine, in particular a diesel internal combustion engine, having a fan for cooling at least the supercharger air, includes a drive device which drives the fan. The drive device can be controlled and/or regulated as a function of operating parameters of the internal combustion engine.

Method controlling an internal combustion engine

A method for sensing the temperature of the air supplied to the combustion chambers of an internal combustion engine for the purpose of detecting air mass. Air temperature can be measured using an inexpensive detector having a transfer function exhibiting a delayed response. Dynamic performance is improved by applying to the detected temperature a temperature correction value that is obtained by applying a transfer function that is substantially the inverse of the transfer function of the temperature detector.

System and method for sensing temperature

The invention relates to a method and arrangement for preparing a fuel-metering signal M for a diesel engine starting with measured variables such as accelerator pedal position, rotational speed, lambda, exhaust gas temperature or torque. A fuel quantity request MW is pregiven in dependence upon the position of the accelerator pedal. This quantity request MW is supplied to a minimum selector together with a second signal. The output signal M of the minimum selector, in turn, determines the metered fuel. The second signal derives from a precontrol characteristic field 50 in dependence upon the speed. The output signal of the precontrol characteristic field MV is influenced by the controller output signal MR in specific operating conditions.

Method and arrangement for controlling the fuel metered in a diesel

Fuel injection pump for diesel internal combustion engines

A fuel injection pump for internal combustion engines is proposed, in which to attain particularly quiet operation of an engine that is operated with direct injection, the fuel delivery is subdivided into a preinjection and a main injection; this injection is attained by annular groove, coinciding with one another, on the pump piston and pump cylinder, and a connecting groove connecting the coinciding annular grooves with a relief opening. After a partial stroke in the region of coincidence of the annular grooves with one another, the communication with the relief opening is interrupted again. The preinjection quantity can be kept particularly small here, with a short interval between the preinjection and the main injection; in combination with a two-spring-holder injection valve, this particularly small preinjection quantity can be kept constant to a great extent even at varying engine speeds, to attain an optimal reduction in combustion noise at various engine speeds.

Fuel injection pump for internal combustion engines

Device for stopping an internal combustion engine

The invention is directed to a method and arrangement for controlling a self-igniting internal combustion engine. The arrangement includes at least one measured-value sensor, electronic control unit for forming a quantity signal for metering fuel, and a control unit for driving individual actuators for each cylinder. The actuators determine the quantity of fuel injected by the pump elements into the cylinders. Under specific conditions, a corrective unit is activated which determines corrective values specific to the cylinders for making the cylinders equal. The open-loop control unit applies the metering signal to the actuators in dependence upon the quantity signal and the corrective values.

Method and arrangement for controlling a self-igniting internal

Internal combustion engine

The invention is directed to a method and an arrangement for controlling the fuel injection in a high-pressure fuel pump. Magnetic valves determine the fuel quantity to be injected into the engine. The magnetic valve is controlled during the pumping phase of the pumping element in such a manner that first a preinjection and then a main injection is carried out. In specific operating conditions, the control apparatus determines the duration of the drive pulses for the magnetic valve at which a preinjection just takes place. With the duration of the drive pulses as a basis, the control apparatus forms compensating signals for the drive pulses which effect preinjection and stores the same.

Method and arrangement for controlling the injection of fuel in an

The invention relates to a method and arrangement for controlling the fuel metered to an engine and especially to a diesel engine. The engine includes a fuel pump drive by a shaft for which injection start and injection end is fixed by a corresponding control of the electromagnetically actuated valve. The drive pulses for pump-delivery start and pump-delivery end are generated in dependence upon the analog signal of an angle sensor.

Method and arrangement for controlling the metering of fuel in an

The invention is directed to a method for assuring emergency driving functions with a diesel engine when the fuel temperature sensor fails, the diesel engine having a charging-air blower and a charging-air temperature sensor. The method includes performing a fuel temperature dependent correction of specific operating functions by taking the charging air temperature as a basis such that all functions corresponding to a fuel temperature of T.sub.K =+20.degree. C. are fulfilled at a charging air temperature of T.sub.L .gtoreq.0.degree. C. and all functions corresponding to a fuel temperature of T.sub.K =-10.degree. C. are fulfilled at a charging air temperature of T.sub.L &lt;0.degree. C. The functions include the start control path, starting speed, idle speed, control path correction, and basic quantity control.

Method for assuring emergency driving functions for a vehicle having a

The invention is directed to a method for determining the full-load limit of an internal combustion engine wherein a limit surface of a predeterminative full-load characteristic field is shifted to thereby compensate for the manufacturing tolerances occurring in the production of the internal combustion engine. The embodiment described relates to a diesel engine equipped with an electronic control unit. The full-load characteristic field of this internal combustion engine includes a smoke limit surface, an exhaust gas temperature limit surface and a combustion pressure limit surface. A further limit surface of constant torque is added to these limit surfaces. In order to provide for compensation of the manufacturing tolerances occurring in the production of internal combustion engines, the constant torque limit surface is shifted so as to possess a specific predeterminative value. In the subsequent operation of the internal combustion engine, a minimum value selection takes place so that at a specific air quantity always the smallest fuel quantity defined by one of the limit surfaces is injected into the internal combustion engine. An apparatus for carrying out the method of the invention is also disclosed.

Method and apparatus for determining the full-load limit of an internal

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Aichtal-Aich, Germany

Hermann Grieshaber