Robert Boschgmbh

Roland Herynek

Georg Mallebrein

Ernst Wild

Lutz Reuschenbach

Werner Hess

Christian Koehler

Michael Oder

Gudrun Menrad

Werner Mezger

Dieter Volz

Juergen Pantring

Manfred Pfitz

Detlef Heinrich

Mirjam Steger

Kristina Eberle

Eberhard Schnaibel

Gholamabas Esteghlal

Andreas Roth

Holger Bellmann

Hans Hillner

Wilfried Tuleweit

Martin Vollmer

Miriam Steger

Franco Baiocchi

A method detects mass flows to the intake manifold of an internal combustion engine having a device for controlling the air supply to the intake manifold and having a sensor for detecting the intake manifold pressure and having a control apparatus for evaluating a trace of the intake manifold pressure. In the context of the method, when the internal combustion engine is switched off, the supply of air to the intake manifold is reduced in a predetermined manner and the trace of the intake manifold pressure, which adjusts thereupon, is evaluated for detecting the mass flows.

Method for determining mass flows into the inlet manifold of an internal combustion engine

This invention is based on a method for monitoring a cooling fluid circuit () of an internal combustion engine (), with at least one heat exchanger (), a regulating valve (), a cooling fluid pump (), and an electronic control unit (). The invention proposes that the control unit () predetermine a permissible upper and lower deviation of a reference parameter from a desired value, based on operating parameters of the internal combustion engine () and with the aid of deviation characteristic fields (), and that it compare these permissible upper and lower deviations to a difference between a desired value and an actual value of the reference parameter, wherein the actual value is determined based on parameters of the volumetric flow of the cooling fluid, possibly with the aid of characteristic fields ().

Method for monitoring a coolant circuit of an internal combustion engine

An internal combustion engine ( ), especially of a motor vehicle, is described. The engine ( ) is provided with a combustion chamber ( ) into which fuel can be injected in a first operating mode during a compression phase and in a second operating mode during an induction phase. The engine ( ) is provided with a control apparatus ( ) for switching over between the operating modes. The engine ( ) includes an exhaust-gas recirculation having an exhaust-gas recirculation valve ( ). The engine ( ) is switched by the control apparatus ( ) into the first operating mode when the exhaust-gas recirculation valve ( ) is jammed in the open state.

Method for operating an internal combustion engine

An internal combustion engine ( ), especially of a motor vehicle, is described which is provided with a combustion chamber ( ) into which fuel can be injected in a first operating mode during a compression phase and in a second operating mode during an induction phase. An exhaust-gas pipe ( ) is provided in which a catalytic converter ( ) is mounted. The engine ( ) is provided with an exhaust-gas recirculation from the exhaust-gas pipe ( ) to an intake manifold ( ). A control apparatus ( ) is provided for controlling (open loop and/or closed loop) operating variables of the engine ( ). The exhaust-gas recirculation rate of the exhaust-gas recirculation is controllable (open loop and/or closed loop) by the control apparatus ( ), inter alia, in dependence upon the temperature of the catalytic converter ( ).

Method and arrangement for operating an internal combustion engine ( ) which can be operated in several modes of operation, especially an internal combustion engine ( ) having direct injection (DE) or intake manifold injection (SRE) and with a control apparatus ( ). The control apparatus ( ) or its software has a plurality of functions ( ) and a scheduler ( ) for activating the functions ( ). Operating modes are assigned to the functions ( ) and the functions ( ) are activated by the scheduler ( ) in dependence upon the assigned modes of operation.

Method and device for operating an internal combustion engine

An internal combustion engine especially for a motor vehicle is described which is provided with a combustion chamber into which fuel can be injected in at least two operating modes. A control apparatus is provided with which a switchover can be made between the operating modes in dependence upon a desired operating mode. The desired operating mode can be determined from a plurality of operating mode requests by the control apparatus.

The invention is directed to an internal combustion engine, especially for a motor vehicle. The engine has a combustion chamber into which fuel can be injected in at least two operating modes. A control apparatus is provided with which a switchover between the operating modes can be effected. A desired value (rlmd$s) can be determined with the control apparatus for the air charge in the combustion chamber. The desired value (rlmd$s) defines a maximum value for the air charge in the combustion chamber which is not exceeded.

An internal combustion engine (,), especially for a motor vehicle is described, which is provided with a regulating valve (,) arranged in an intake pipe (,), through which air is fed to a combustion chamber (,). Furthermore the internal combustion engine (,) is provided with an exhaust gas feedback valve (,), through which exhaust gas is fed to an intake pipe (,). The internal combustion engine has a control unit (,) which determines the mass flow (msdk) through the regulating valve (,) and the mass flow (msagr) through the exhaust gas feedback valve (,). The determined mass flow (msagr) through the exhaust gas feedback valve (,) is divided into an inert gas portion (msagr&prime;) and an air portion (msl) according to the air/fuel ratio (Lambda).

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Oetisheim, Germany

Roland Herynek