Robert Boschgmbh

Nikolaus Benninger

Ernst Wild

Georg Mallebrein

Werner Hess

Lutz Reuschenbach

Hong Zhang

Harald Von Hofmann

Gunther Plapp

Horst Harndorf

Wolfgang Boerkel

Hendrik Koerner

Eberhard Schnaibel

Klaus Joos

Udo Sieber

Werner Mezger

Michael Nau

Uwe Maienberg

Klaus Hirschmann

Marc Bareis

Manfred Pfitz

Hartmut Bauer

Frank Ilgner

Axel Stuber

Heinz Britsch

Christian Tischer

Ernst-Walter Lang

Guenther Plapp

Frank Rodefeld

Stefan Miller

Bernhard Ebinger

Peter-Juergen Schmidt

Rainer Schillinger, Deceased

Gerhard Brueggen

Thomas Oelker

Peter Schomakers

A metering unit for metering liquid and/or gaseous educts by means of a feed pump for a fuel cell system, including at least one lead line for delivering an educt flow, at least one control piston, and a differential pressure valve for regulating the educt flow; the differential pressure valve has a regulatable throttling cross section, which is variable automatically, as a function of a flow pressure dictated by the control piston, in order to regulate the educt flow. The lead line leads to the control piston, and between the control piston and the differential pressure valve a first and a second connecting line are provided.

Dosing unit and method for dosing liquid or gaseous educts for a fuel cell system

The invention relates to a method and an apparatus for the post-treatment of exhaust gas produced by an internal combustion engine ( ), in particular in a motor vehicle, wherein the following are provided: a hydrolysis unit ( ) and a metering device ( ) connected to it via a hydrogen line ( ) for the metered addition of hydrogen to the untreated exhaust gas (A) and/or to the exhaust gas treated by means of an oxidation catalytic converter ( ), and a control/regulating unit ( ) that is functionally connected to the hydrolysis unit ( ) and the metering device ( ) in order to control or regulate the production of hydrogen in the hydrolysis unit ( ) and the metering device ( ) as a function of certain operating states of the internal combustion engine ( ) and registered parameters of the exhaust-gas system (FIG. ).

Method and device for treating exhaust gases produced by an internal combustion engine

The invention relates to a method for starting a multi-cylinder internal combustion engine ( ), especially of a motor vehicle. The position of a piston ( ) in a cylinder ( ) of the engine ( ) is determined and fuel is injected into a combustion chamber ( ) of that cylinder ( ) whose piston ( ) is disposed in a work phase. In order to make possible a start of the internal combustion engine ( ) as reliable as possible without an electro-motoric starter, it is suggested that the inlet and/or outlet valves ( ) of at least one cylinder ( ), whose piston ( ) is disposed after top dead center (TDC), is brought into a position corresponding to a work phase in advance of the starting operation.

Method for starting a multi-cylinder internal combustion engine

Method for determining the air entering the cylinders of an internal combustion engine having a supercharger

A method for determining a gas charge of an internal combustion engine having an intake manifold. The intake manifold has a gas mixture, which is a fresh air/fuel mixture and an exhaust gas, and further has a gas mass flow from the intake manifold and an intake manifold pressure. The method includes the steps of determining a partial pressure of the fresh air/fuel mixture in the gas mass flow by setting up a mass balance for a fresh air/fuel mixture mass flow, determining a partial pressure of the exhaust gas in the gas mass flow by setting up a mass balance for an exhaust gas mass flow, and determining a gas mass flow via a throttle based on a function that depends on a temperature compensation factor, a pressure compensation factor and a factor depending on a ratio of a pressure downstream of the throttle to a pressure upstream of the throttle. The pressure downstream of the throttle corresponds to the intake manifold pressure.

Method and device for determining the gas intake in an internal combustion engine

Method and device for controlling an internal combustion engine in accordance with operating parameters

An internal combustion engine, in particular for a motor vehicle, includes a throttle arranged in an intake pipe, through which air can be fed to a combustion chamber. Furthermore, the internal combustion engine includes a valve arranged in an exhaust gas recirculation line, through which exhaust gas can be fed to the intake pipe. A first mass flow through the throttle can be determined by a control device. Furthermore, a second mass flow through the valve can be determined by the control device. Finally, a third mass flow fed to the combustion chamber can be determined by the control device from the first mass flow through the throttle and the second mass flow through the valve.

System for operating an internal combustion engine

The invention is directed to a control arrangement for a direct injected gasoline engine. A sensor detects at least one operating variable of the engine and an actuator adjusts the air supplied to the engine. A control unit switches the engine between a stratified charge mode of operation and a homogeneous mode of operation in dependence upon the one operating variable of the engine. The control unit drives the actuator so as to cause the actuator to undergo a defined displacement when the control unit switches between the modes of operation so that the torque of the engine is essentially the same before and after the switchover between the modes of operation.

Control arrangement for a direct-injecting internal combustion engine

The invention is directed to a method for computing a fuel-metering signal for adjusting a pregiven lambda value for the composition of the air/fuel mixture of an internal combustion engine. In the method, a first signal is formed which represents the air quantity flowing into the engine and a second signal is formed on the basis of the first signal so that a first lambda desired value adjusts when using its second signal as a fuel-metering signal. Various additional second lambda desired values are formed as a function of operating parameters of the engine. A selection is made of those second lambda desired values having the highest priority and the fuel-metering signal is formed by weighting the second signal with the second lambda desired value of the highest priority.

Method for forming a fuel-metering signal for an internal combustion

A method for forming a signal relating to the quantity of exhaust gas recirculated in an internal combustion engine. The signal for the quantity of recirculated exhaust gas is formed on the basis of a signal for the stream of fresh gas fed to the internal combustion engine and a signal for the entirety of the stream of gas fed to the internal combustion engine. The signal for the entirety of the stream of gas which is fed is formed from a series of characteristic operating variables. These characteristic operating variables include, inter alia, the pressure in the intake tract, which can either be detected by means of a sensor or be formed from standby signals. The signal for the quantity of recirculated exhaust gas can be provided with a dynamic correction signal. Furthermore, the signal for the quantity of recirculated exhaust gas can be used in an exhaust gas recirculation valve with position reporting facility to identify an adaptive correction signal.

Method for forming a signal relating to the quantity of exhaust gas

The arrangement for determining rotation angle of two rotating parts in an internal combustion engine includes a first rotating part having a protruding member extending laterally from the first rotating part, the first rotating part being connected with a crankshaft of the internal combustion engine; a second rotating part having a protruding element extending laterally, therefrom the second rotating part being connected to a camshaft of the internal combustion engine and the second rotating part being positioned adjacent to the first rotating part; a pickup device for generating a first output signal when the protruding member passes by the pickup device during rotation of the rotating parts and for generating a second output signal when the protruding element passes by the pickup device during rotation of the rotating parts; and a signal processing device for receiving the first and second output signals from the pickup device, for determining a time interval between one of the first and one of the second output signals and for calculating an angular displacement between the first and second rotating part from the time interval. The arrangement includes only one pickup device for generating both first and second output signals and the protruding member and protruding element are shaped and positioned so that each of the first output signals and the second output signals is generated by the single pickup device and the first and second output signals are different and distinguishable from each other.

Arrangement for determining angle of rotation of two rotating parts

An electronic system for controlling the fuel injection of an internal-combustion engine based on the load, rotational speed, and temperature, as well as at least an oxygen probe reading in the exhaust pipe. The system determines basic injection-quantity signal as well as a transition-compensation signal to adapt the injection fuel quantity in situations of acceleration and deceleration. The system stores an engine characteristics map for a wall-film-quantity signal, and dividing factors for acceleration and deceleration. The system generates a correction value (Wkor) for the wall-film quantity signal and correction factors (FWS1kor, FWS2kor) for the two dividing factors. Three methods are provided for changing the correction factors in connection with the adaptation and these are based on a direct calculation, based on an estimation of the missing quantity and incremental calculation, and based on an incremental adjustment based on the evaluation of the oxygen-probe voltage.

Electronic system for controlling the fuel injection of an

The arrangement according to the invention permits the optimal control of the air/fuel ratio of an air/fuel mixture supplied to an internal combustion engine while considering the gas storage capability of a catalyzer. The degree of conversion of the catalyzer is dependent upon the oxygen content of the exhaust gas which is available. Since this degree of conversion is partially influenced by the oxygen given off by the catalyzer, a targeted enrichment or leaning of the air/fuel ratio can optimize the degree of conversion of the catalyzer.

Method and arrangement for controlling the fuel for an internal

The invention is directed to a system for supplying an internal combustion engine with fuel which includes the following functional components: a tank; a fuel pump; a metering device for metering fuel to the intake air; a feed line for conducting fuel from the fuel pump to the metering device; a reservoir which is so configured and mounted that fuel can be pumped therefrom to the metering device and which is not filled when tanking the tank and which can be again filled from the tank; and a control unit for driving the fuel pump and the metering device. The fuel pump is fixedly connected to the reservoir so that only fuel is pumped therefrom and a reservoir fill pump is provided which continuously maintains the reservoir filled as long as fuel is present in the tank. The system affords the advantage that even when, after tanking, fuel of a composition is present in the tank which is substantially different from the composition of the fuel present in the tank before tanking, the metering device first is supplied with fuel of the old composition and then the composition of the metered fuel only changes slowly. In this way, a continuous stable operation of the internal combustion engine is provided.

Fuel-supply system and tank assembly for an internal combustion engine

The invention is directed to an arrangement for advancing the point in time at which the mixture control is placed into operation when starting an internal combustion engine. This advance is made possible in that the exhaust-gas probe heater is already switched on in advance of the start of the engine. Operations are utilized for triggering the required switching signal which occur when the vehicle is taken into service such as opening the doors of the vehicle. An unnecessary heating of the exhaust-gas probe is precluded by limiting the time duration of the heating pulse applied to the heater.

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Vaihingen, Germany

Nikolaus Benninger