Robert Boschgmbh

Gerhard Stumpp

Wolf Wessel

Karl Hofmann

Max Straubel

Ulrich Flaig

Hermann Eisele

Fridolin Piwonka

Wilfried Sautter

Heinrich Knapp

Konrad Eckert

Johannes Locher

Rainer Buck

Hermann Kull

Volkhard Stein

Josef Steiner

Josef Schlagenhauf

Gerhard Schielinsky

Gerald Hofer

Karl Konrath

Ewald Eblen

Hermann Grieshaber

Dietrich Trachte

Odon Kopse

Werner Banzhaf

Hans-Jorg Vogtmann

Ludwig Walz

Nestor R Amaya

Friedbert Michel

Ernst Linder

Rudolf Babitzka

Hans Kubach

Werner Fischer

Rudolf Krauss

Wolfgang Fehlmann

Reinhard Schwartz

Wilhelm Polach

Gerhard Engel

Max Greiner

Johannes Brettschneider

Wolfgang Ripper

Albrecht Sieber

Otto Glockler

Alfred Schmitt

Werner Faupel

Manfred Schwarz

Klaus Krieger

Dieter Junger

Gunther Jaggle

Thomas Kuttner

Werner Teschner

Bernhard Bonse

Dieter Seher

Otmar Weiss

Paul Fussner

Wilhelm Eyberg

Claus Maier

Klaus-Dieter Zimmermann

Jochen Neumeister

Andreas Boehringer

Ralf-Michael Bartke

Jurgen Treiber

Herbert Scharl

Jurgen Biester

Detlev Runge

Martin Hafner

Waldemar Becker

Horst Wellein

Gunter Schoneck

Volkard Stein

Fridolin Piwonda

Process and device for monitoring a fuel delivery system

The invention is directed to an arrangement for controlling the engine speed and especially the idle engine speed of an engine of a motor vehicle. The pregiven idle engine speed desired value is controlled in dependence upon the road speed of the motor vehicle so that this desired value becomes greater with increasing road speed.

Arrangement for controlling the idle speed of an engine of a motor

Sensors for motor vehicles emit a base signal when the variable which they measure takes on a base value. For example, a road-speed transducer supplies no pulses when either the vehicle is at standstill or when the sensor is defective. A method for providing a reliable operation of a motor vehicle includes the step of starting a substitute/emergency-function immediately when only the base signal is received from the sensor. If it is later determined that the base signal was only emitted because the measured variable took on its base value, then the substitute/emergency-function is again reversed. By starting a substitute/emergency-function basically always when a checked sensor emits no signal, it is ensured that safety measures are taken as rapidly as possible.

Method for reliably operating a motor vehicle

Diesel-internal-combustion-engine, in particular for vehicles

To monitor the functioning of a redundant safety fuel shut off valve in a diesel engine, the electric power supply for a controlling device for the fuel quantity adjustor of a fuel injection pipe is decoupled from the power supply for the control of the electromagnetic fuel shut off valve. A relay controlled by a driving switch of the engine has a contact whose opening is time delayed relative to the opening of the driving switch. The relay contact is connected for energizing the controlling device for the fuel quantity adjustor whereas the energization and deenergization of the fuel shut off valve is effected immediately via a decoupling member. When the driving switch is opened and the engine is running during the given time delay interval, an error signal is generated indicating a malfunction of the fuel shut off valve.

Safety system for internal combustion engines

A fuel injection pump for internal combustion engines, in particular an in-line injection pump for Diesel engines, is proposed having an injection quantity governor and an electrically driven feed pump, in which in order to assure an emergency shutoff in the event of a malfunction of the injection quantity governor, a check valve, the forward flow direction of which is toward a suction chamber filled with fuel by the feed pump, is disposed between the pressure-side outlet of the feed pump and the suction chamber. An emergency shutoff device responding to a malfunction switches off the feed pump drive, so that because of the lack of feed pressure the check valve closes and blocks off the suction chamber. The engine comes to a stop, as soon as a partial vacuum is established in the suction chamber, which occurs as soon as several revolutions later.

Fuel injection pump for internal combustion engines

A fuel injection pump for internal combustion engines having a hydraulic control mechanism includes a control cylinder with a control piston actuating a control member, a hydraulic work chamber and one switching valve each for an input and an output controlled by a valve control unit. The inflow to and return from the work chamber is provided with the control valves in order to shut down the engine upon a shutoff or a malfunction in the hydraulic control mechanism. The fuel feed pump is electrically driven, and the hydraulic work chamber communicates with the fuel tank via a relief device. The supply of current to the valve control unit and the feed pump is switched on and off, along with the rest of the current supply to the engine, via a driving switch. Additionally, the valve control unit is embodied such that upon the appearance of a persistent control deviation of the control member, the valve control unit shuts off the feed pump. The relief device includes various variant embodiments operative upon shutoff of the current supply or the occurrence of a malfunction and enables the restoration of the control mechanism to its zero or stopping position.

A fuel injection pump of the distributor type in which to attain low injection rates in the idling range, longitudinal slits or longitudinal conduits are provided in the jacket face of the pump piston in accordance with the number of supply strokes of the pump piston. The slits or conduits are in continuous communication with an annular groove and the adjoining annular slide which is the quantity adjusting device of the fuel injection pump. The slits on conduits come in turn into communication with a control opening during the supply stroke of the pump piston via which opening the pump work chamber can be relieved whenever in the course of the pump piston stroke movement a second outlet opening of a relief conduit extending in the pump piston and communicating with the pump work chamber, comes into communication with the annular groove. From this point on, in order to attain quiet idling of the engine, the supply rate of the pump piston is reduced by the outflow rate, determined by a throttle of the pumped fuel into the suction chamber. By rotating the annular slide relative to the pump piston, the control opening can be moved out of the operating range of the longitudinal conduits and the quiet-idle device is shut off.

An electronic control device is proposed for manipulated variables of an internal combustion engine having self-ignition. In this device, an injection duration signal is utilized as a load signal. While the injection onset signal can be satisfactorily detected via the opening speed, the hysteresis signal is efficaciously utilized to detect the signal for the end of injection. The proposed solution makes it possible to detect and regulate both the injection onset and the fuel quantity, using only a single transducer in the injection valve, on or in the fuel line, or on the pumping element, and this load signal is available for generalized uses in the control device. It is furthermore possible to obtain an rpm signal on the basis of the signal for injection onset and/or end, and to process it further.

Electronic control device for operating parameters

A controlling device for controlling the supply of gases into combustion spaces of a self-igniting internal combustion engine includes a control member for regulating the flow of returned exhaust gas and an air throttle for regulating flow of sucked in air. The air throttle and the control member are linked to pneumatic setting motors which in turn are controlled by pressure transforming means operating with a source of a reference pressure and a source of control pressure. An output of the pressure transforming means is provided with electrically controlled switching means which selectively actuate respective setting motors. The electric control of the pressure transforming means and of the connecting means is made in dependency on operational variables of the engine.

Device for and method of supplying cases into a combustion space of a

An automatic control for an adjustable turbosupercharger in the air supply of an internal combustion engine adds a static anticipatory control signal and a dynamic anticipatory control signal to the error signal that is provided to an actuating mechanism for the control of the supercharger. The error signal is obtained by comparing actual charging pressure with a reference charging pressure for one portion of the control displacement and in the other portion of the control displacement the error signal is obtained by comparing actual air quantity supplied to an engine cylinder with a reference air quantity. This results from a limiting device interposed in the charging pressure control loop. The static anticipatory control depends on engine speed and engine load and is supplied with additive corrections for engine temperature and for battery voltage. A limit value dependent upon engine speed is introduced through a minimum circuit to put a lower limit on the sum of error signal and static anticipatory control and the resulting signal is then added to a dynamic anticipatory control and derived from rate of control displacement. The control signal is also interrupted during the engine start period.

System for control of the supercharging of an internal combustion engine

A fuel injection system functioning with a reservoir, in which a quantity received by the reservoir is injected after the termination of pump supply for the purpose of prolonging the injection time.

Fuel injection system for self-igniting internal combustion engines

The invention is directed to a correcting arrangement for a fuel metering apparatus of an internal combustion engine by means of which permanent offsets of the positioning control loop of the fuel metering apparatus of the internal combustion engine are corrected. This is accomplished in that at a specific load condition of the internal combustion engine, preferably in the overrun mode of operation subsequent to the idle speed control characteristic, the actually injected fuel quantity which is a diesel engine, for example, is preferably measured by means of the movement of the nozzle needle of the injection valve of the fuel metering apparatus, is checked to a known value, in the example cited preferably for zero value, and in that the result of this check is used to influence the control system of the fuel metering apparatus of the internal combustion engine.

Correcting arrangement for a fuel metering apparatus of an internal

The air charge pressure sensor of the control system for a turbo supercharger of an internal combustion engine measures absolute charge pressure, but is used, in the idling condition of the engine, to measure atmospheric pressure, which is stored when the engine is idling for deriving the relative charge pressure for the control system.

Control system for air charge pressure in an internal combustion engine

A nozzle holder for internal combustion engines is proposed, in which a sleeve can be secured in the cylinder head by means of a tightening nut. The sleeve protects the portion of the nozzle which protrudes into the combustion chamber from thermal effects. Ease of serviceability is attained in that when the nozzle holder is rotated out of the cylinder head, the sleeve is simultaneously removed, without requiring additional hand operations.

Nozzle for internal combustion engines

Growing community of inventors

Stuttgart, Germany

Gerhard Stumpp