Robert Boschgmbh

Manfred Pfitz

Ernst Wild

Georg Mallebrein

Lutz Reuschenbach

Detlef Heinrich

Roland Herynek

Werner Hess

Werner Mezger

Christian Koehler

Michael Oder

Dieter Volz

Juergen Pantring

Gudrun Menrad

Kristina Eberle

Axel Stuber

Mirjam Steger

Eberhard Schnaibel

Helmut Denz

Gholamabas Esteghlal

Nikolaus Benninger

Holger Bellmann

Klaus Bottcher

Alfred Kloos

Wilfried Tuleweit

Erwin Kirschner

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

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

A method for operating an internal combustion engine includes the steps of determining a pressure in a suction portion from a position of a throttle flap, passing a signal produced from the position of the throttle flap through a delay element, using the passed signal for forming a limit for a permissible value region, utilizing as the delay means mechanism at least two delay elements, such that a delay of one of the delay elements is switched off when a speed with which the position of the throttle valve changes lies above a positive limiting value, and the delay of the other delay element is switched off when the speed with which the position of the throttle valve changes lies below a negative limiting value.

Method, computer program and control and/or regulating device for operating an internal combustion engine

A method for sampling a sensor that receives a pressure signal, the pressure signal being used as a basis for a pressure signal-based cylinder charge calculation for calculating the fresh-gas charge of cylinders of an internal combustion engine. At the instant at which an intake valve closes at a respective cylinder of the internal combustion engine, the pressure signal is received multiple times in succession in a sampling sequence of individual impulses.

Scanning method for pressure sensors used in the pressure-based detection of filling levels

The invention relates to a method and a control arrangement for the metering of fuel in an injection system, especially for engines having an exhaust-gas turbocharger. The inducted air mass in the intake manifold ( ) is measured as a primary control quantity by an air mass measuring apparatus ( ) for the metering of fuel and the cylinder charge is computed via a control apparatus ( ). A switchover to a substitute signal (P) as the primary control quantity takes place when a leak ( ) is detected in the intake manifold ( ) via a change of stored and actual pressure conditions.

Method for controlling the metering of fuel in an injection system and control arrangement therefor

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.

The device for detecting an erroneous signal characteristic of a load on an internal combustion engine that includes first and second differentiators (,) with delay devices that generate corresponding output signals (S,S,) from respective load signals (S,S,); first and second magnitude-forming devices (,) connected with the first and second differentiators respectively to generate respective magnitude signals from the corresponding output signals (S,S,) first and second low-pass filters (,) connected with the first and second magnitude-forming devices respectively to generate first and second DC voltage signals (MW,MW,); a subtracting device (,) for subtracting the first and second DC voltage signals (MW,MW,) from each other to generate a difference signal (D); and comparison devices (,) for generating a first error signal or a second error signal when the difference signal (D) is greater than a predetermined threshold (SW,) or less than a negative of the predetermined threshold (&minus;SW,) respectively, so that the first error signal indicates the main load signal is faulty and the second error signal indicates the auxiliary load signal is faulty.

Device for the recognition of a defective signal

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

A method and an apparatus for determining the temperature of a gas charge in a cylinder of an internal combustion engine increase the accuracy with which the temperature of the gas charge is determined. The gas charge includes a residual gas portion and a fresh gas portion. The temperature of the gas charge is determined by ascertaining the temperature of the fresh gas portion, the proportion of the fresh gas portion in the gas charge, the temperature of the residual gas portion, and the proportion of the residual gas portion in the gas charge. The temperature of the gas charge is calculated based on these ascertained quantities.

Method and apparatus for determining the gas temperature in an internal

The invention is directed to a method for determining a load signal of an internal combustion engine having an intake pipe with a pressure sensor, external exhaust-gas recirculation (EGR) and an EGR valve. A load signal (tl) is computed in a circuit arrangement which is proportional to the mass inducted per revolution of the engine. The computation is made in dependence upon measured intake-pipe pressure (ps) and the speed (n) of the engine in rpm. On the one hand, the method makes a simple adaptation possible, while, on the other hand, a correct load signal is formed also in steady-state operation and, in this way, reduced exhaust-gas emissions of the engine are made possible. The exhaust-gas mass flow flowing through the EGR valve is determined by converting the exhaust-gas mass flow into an rpm-dependent signal. The rpm-dependent signal is filtered in a filter simulating charging operations in the intake pipe. A corrective signal (scorr) proportional to the exhaust-gas mass inducted by the engine per revolution thereof is determined and this corrective signal (scorr) is subtracted from the load signal (tl) to generate and output the corrected load signal (tlcorr).

Method for determining the load signal of an internal combustion engine

Process for finding an additional quantity of fuel to be injected during

Growing community of inventors

Vaihingen, Germany

Manfred Pfitz