Robert Boschgmbh

Heinz Stutzenberger

Helmut Rembold

Ferdinand Grob

Gottlob Haag

Roger Potschin

Uwe Mueller

Ernst Linder

Dieter Kienzler

Hubert Dettling

Hans Deichsel

Christian Koehler

Dirk Mentgen

Heinz Britsch

Bernhard Bauer

Engelbert Tillhon

Christian Klinke

Joerg Lange

Klaus Bottcher

Thomas Lehmann

G&uuml;ng&ouml;r Yurtseven

Erg&uuml;n Filiz

Yalcin Ertem

A fuel injector for an internal combustion engine, having a valve member which is axially displaceable in a guide bore of a valve body, has two guide areas with which it is displaceably guided in the guide bore, a first upper guide area being provided on the send of the valve member facing away from the combustion chamber and a second lower guide area being provided in an area of the valve member near the combustion chamber, a lower guide area separating an annular clearance which is formed between the valve member shaft and the wall of the guide bore and is connected to a high-pressure fuel inlet channel is separated from a lower pressure space opening onto the valve seat face when the fuel injector is closed, and opening this connection during the opening stroke movement of the valve member, and having a connecting throttle cross section between the annular clearance and the lower pressure space. This throttle cross section is designed as a throttlebore.

Fuel injection valve for internal combustion engines

A fuel-supply system for an internal combustion engine, particularly of a motor vehicle. The fuel-supply system is provided with a pump for delivering fuel into a storage chamber and for producing a pressure in the storage chamber. In addition, provision is made for a pressure sensor for measuring an actual value of the pressure in the storage chamber, as well as a pressure-control valve for influencing the pressure in the storage chamber. A control unit is provided with means by which the pressure in the storage chamber is controllable to a setpoint value. In addition, the control unit is provided with means by which the closed-loop control of the pressure in the storage chamber is able to be superseded by an open-loop control.

System for operating an internal combustion engine, in particular of a motor vehicle

Fuel injection system for an internal combustion engine

Fuel injection valve with a piezo-electric or magnetostrictive actuator

A fuel supply system with two series-connected pumps and fuel injection valves that inject fuel directly into a combustion chamber of an engine. The system includes a relief device. In a simple embodiment, the relief device can assure that the pressure in the pressure line can drop when the engine has been shutoff. The relief line may, however, also be embodied such that during the entire time of engine operation, the pressure in the pressure line can be lowered at any time as needed. The apparatus and the method are intended for an internal combustion engine of a vehicle.

Fuel supply system and method for operating an internal combustion engine

The invention is directed to a method and an arrangement for enriching the oxygen content in the intake air of an internal combustion engine. To enrich the oxygen content, air is conducted through a membrane which is primarily permeable for oxygen molecules. This membrane is mounted in an enrichment channel which opens into the intake channel of the engine. The oxygen content in the intake channel is continuously detected by at least one sensor device. On the one hand, a reduction of the toxic emissions of the engine is provided while, on the other hand, an increase in the power of the engine is simultaneously provided. This is achieved with a drivable actuator device which changes the concentration of the inducted air as well as the oxygen-enriched air in dependence upon the detected oxygen content.

Method and apparatus for enriching the oxygen content in the intake air

A fuel supply systems with two series-connected pumps and with fuel injection valves that inject fuel directly into a combustion chamber of an engine in which a starting process takes less time because of the small feed quantity of the second fuel pump. The system includes a valve device which assures that during the starting process the first fuel pump furnishes the fuel to the fuel valves at elevated feed pressure. In many cases, this elevated feed pressure suffices to start the engine in the quickest possible time. The apparatus and the method are intended for an internal combustion engine of a vehicle.

Fuel supply and method for operating an internal combustion engine

A fuel pump for a two-stroke internal combustion engines, having a pump chamber with an inlet valve for connecting to a fuel delivery pump. An outlet valve for connecting to an injection nozzle of the engine, and an axially driven pump piston which defines the pump chamber. For the purposes of a simple structural embodiment for reasonably priced manufacture and flexible fuel metering, a stop is provided, which defines the intake stroke of the pump piston and whose relative position to the bottom dead center of the pump piston can be controlled as a function of operating parameters of the engine.

Fuel pump for two-stroke internal combustion engine

The invention is directed to a method and an arrangement for controlling an internal combustion engine wherein a torque reducing control of the opening times of the inlet and outlet valves of the engine and/or a torque reducing control of the geometry of the inlet or outlet systems of the engine is undertaken in the case of a drive slip control.

Method and arrangement for controlling an internal combustion engine

An arrangement for the treatment of exhaust gases from a compression-ignition internal combustion engine, in which, fuel is metered via a metering valve and introduced into the exhaust system via an evaporator to promote the action of a reduction catalyst arranged on the downstream side of the engine.

Arrangement for treatment of exhaust gases for a compression-ignition

Fuel injection apparatus for a two-stroke internal combustion engine

The invention sets forth an arrangement for the aftertreatment of exhaust gases from a compression-ignition internal combustion engine, in which, to improve the operation of a reducing catalytic converter, a reducing agent is injected into the exhaust gas fed to the catalytic converter. Injection is performed by virtue of an electrically controlled metering valve which is combined in a common housing with a control valve. This control valve serves for the controlled introduction of compressed air supplied, in which a quantity of reducing agent made ready by the metering valve is prepared and introduced intermittently into the exhaust gas. This serves, in particular, to avoid urea deposition and clogging in the metering valve and the control valve and for the optimum preparation of the reducing agent introduced.

Arrangement for the aftertreatment of exhaust gases

In a method and device for the open-loop control of an internal-combustion engine, the change in the torque caused by an influencing of the ignition angle is compensated for by a correspondingly adjusted influencing of the air inducted by the internal-combustion engine. Thus, the accelerator-pedal characteristic is hardly influenced in the case of a change in the ignition angle. The method and device can be used, for example, to accelerate the heating up of a catalytic converter after start-up of the internal-combustion engine. To reinforce the heating operation and to reduce emission, an intervention in the air/fuel ratio can be made at the same time, and a switching signal can be produced, for example, for a secondary air pump. The air inducted by the internal-combustion engine is generally influenced by an idle-speed actuator, which is arranged in a by-pass duct leading to the throttle valve. In the case of internal-combustion engines having an electronically controlled throttle valve, in place of the idle-speed actuator, the throttle valve can also be influenced accordingly. Weighting factors which depend on the operating state of the internal-combustion engine, are used to weight the influencing of the ignition angle, the idle-speed actuator, the throttle valve, and/or the air/fuel ratio.

Method and device for the open-loop control of an internal-combustion

A system for reducing fuel consumption in an internal combustion engine and to meet optimal exhaust emissions values.

Growing community of inventors

Vaihingen, Germany

Heinz Stutzenberger