Robert Boschgmbh

Alfred Schmitt

Ewald Eblen

Joachim Tauscher

Anton Karle

Pierre Lauvin

Johannes Locher

Helmut Laufer

Nestor Rodriguez-Amaya

Gerhard Engel

Manfred Birk

Hermann Grieshaber

Wilhelm Polach

Ulrich Flaig

Josef Wahl

Hermann Kull

Fridolin Piwonka

Werner Zimmermann

Alf Loffler

Hans-Joachim Siebert

Herbert Graf

Bernhard Kaczynski

Werner Pape

Dominique Buisson

Henri Paganon

Helmut Rembold

Wolf Wessel

Gerhard Stumpp

Max Straubel

Karl Hofmann

Dietrich Trachte

Detlev Potz

Iwan Komaroff

Jean Pigeroulet

Wilhelm Christ

Nikolaus Simon

Wilhelm Eyberg

Hannes Pflug

Friedrich Weiss

Lucien Hehn

Rodriguez-Amaya

Thomas Henze

Hung Truong-Canh

The invention relates to an electronic circuit arrangement for triggering excitation windings of electromagnetic components, provided with supplementary circuit elements, in particular free-running circuit elements, preferably solenoid valves (MV.sub.1 to MV.sub.n), whereby in order to provide a flexible open-loop control, the components are each connected in series to a controllable contact element (3). To reduce the degree of complexity of the circuit, the manufacturing price and the space requirement, it is proposed that the connecting terminals (1, 4) of this series connection lead directly, and the connections (2) between the components (MV.sub.1 to MV.sub.n) and the contact elements (3) lead via diodes (D.sub.1 to D.sub.n), respectively, to a collecting point (A, B, C), to which collecting points (A, B, C) is linked one and the same supplementary circuit-element configuration (T.sub.F,C.sub.L,10,11) shared by all components. Accordingly, the component parts of the supplementary circuit elements are subject to multiple use; they are available to all of the electromagnetic components.

Electronic circuit arrangement for triggering solenoid valves

A method and apparatus for controlling the flow of fuel for a gasoline or diesel gasoline engine controls a solenoid valve for actuating the fuel pump. A pump piston is driven by the camshaft and, in turn, pressurizes the fuel for delivery to the individual cylinders. Based on the operation of the solenoid valve, the beginning of the injection of fuel and the end of the injection of fuel are established Based upon spaced angular markings on the camshaft, a control unit determines the trigger signals for actuating the solenoid valve. To calculate the trigger signals, the markings on the camshaft are counted and interpolated therebetween over time. The interpolation is based on the instantaneous rotational speed N of the camshaft, which is sensed immediately before performing the interpolation.

Method and apparatus for controlling a fuel pump

Process and apparatus for controlling and measuring the movement of an

The invention relates to an electrically controlled injection system for internal combustion engines, in which a magnet valve that is open when without current is used to control the fuel quantity of a high-pressure chamber in the injection pump. A pressure chamber communicates via a pressure conduit directly with the pump work chamber of the high-pressure pump, and a connection from the pressure chamber to a diversion chamber is controlled by a movable valve member via a valve seat. A diversion bore, and a pressure equalization piston is disposed on the valve member, via a neck, on a side remote from the magnet, so that approximately the same pressure as on the magnet side of the movable valve member prevails on the face end of this pressure equalization piston. The chambers on both face ends of the valve member communicate with one another through a connecting conduit, and a further connecting conduit leads from the magnet chamber to a leakage chamber. In one feature of the invention, first and second throttles are disposed upstream of the face end chamber and at the end of the connecting conduit, so that the valve member is embedded in a hydraulic column of equal pressure.

Electrically controlled fuel injection system

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

A control system for a fuel pump, particularly for a solenoid-valve-controlled fuel pump in the case of a self-ignitable internal-combustion engine, in which at least one pulse transmitter is mounted on the crankshaft and/or on the camshaft. The generated pulse sequences include at least several reference pulses for establishing the beginning of fuel injection, as well as speed pulses for detecting the average and the instantaneous rotational speeds. A trial activation takes place to detect into which cylinder the fuel must be injected. Based on the reaction of the fuel injection system and/or of the internal-combustion engine, it is detected whether fuel was injected into the proper cylinder.

Control system for a fuel pump

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

A fuel injection arrangement for internal combustion engines, particularly for diesel engines, is indicated, in which the fuel injection is divided into an advance injection and a main injection for the purpose of noise reduction. An advance injection unit (27) is provided for the purpose of proportioning the advance injection quantity and a fuel injection pump of a conventional construction is provided for proportioning the main injection quantity. For an optimal design of the advance injection quantity with respect to noise reduction without influencing the main injection quantity, the advance injection unit (27) comprises a high-pressure storage (28), which is compressed to injection pressure, and at least one solenoid valve (30), which is controlled with respect to time. The advance and main injections are preferably effected via separate nozzle cross sections (21, 22).

Fuel injection pump for internal combustion engines, in particular

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

A fuel injection pump is proposed in which over a first portion of the supply stroke of the pump piston fuel for the main injection is pumped via a distributor line and a distributor groove into one at a time of a plurality of fuel injection lines. In a second, remaining portion of the pump piston supply stroke, on the same cam flank, fuel is then pre-stored in a reservoir, controlled by a first electrically controlled valve and a second electrically controlled valve and by one of a plurality of longitudinal control grooves, which fuel subsequently, before the beginning of the next main injection determined by the closure of the first electrically controlled valve, is pumped via a second distributor line into the next succeeding injection line.

Fuel injection pump

Fuel injection nozzle for internal combustion engines

Device for injecting fuel into a combustion chamber of an internal

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.

Fuel injection pump for internal combustion engines

A fuel injection apparatus for internal combustion engines in which via an electrically controlled valve communication is established between a pump work chamber of a fuel injection pump and a low-pressure fuel chamber, and the switching times and movement times of the valve member of the valve are detected with the aid of a switching position transducer. The actual switching times are used for correction of the control times of the valve and thus for correction of the quantity of fuel attaining injection.

Fuel injection apparatus for internal combustion engines

Growing community of inventors

Ditzingen, Germany

Alfred Schmitt