Robert Boschgmbh

Gunther Plapp

Rudiger Jautelat

Rolf Kohler

Alfred Kratt

Eberhard Schnaibel

Cornelius Peter

Lothar Raff

Michael Westerdorf

Botho Zichner

Peter Werner

Ulrich Steinbrenner

Manfred Mezger

Dieter Gunther

Nikolaus Benninger

Wolfgang Wagner

Ulrich Mayer

Klaus Heck

Hans-Martin Muller

Helmut Denz

Ernst Wild

Bernhard Mattes

Heinrich Knapp

Peter Romann

Helmut Maurer

Hartmut G Brammer

Michael Horbelt

Robert H Entenmann

Hermann Nusser

Herbert Arnold

Erhard Renninger

Otto Glockler

Harald Kalippke

Bernd Kraus

Richard Bertsch

Richard Gerber

Jorg Issler

Claus Ruppmann

Wolfgang Boerkel

Gerold Grimm

Egbert Perenthaler

Gunter Brand

Helmut Schwarz

Harald Sailer

Ernst-Walter Lang

Hans-Ulrich Gruber

Stefan Huwig

Jurgen Kurle

Martin Stilling

Stephan Hohne

Rainer Schillinger, Deceased

Wolfgang Lolhoffel

The invention is directed to a method for checking the operability of a conduit system conducting a fluid flow. The conduit system is for an internal combustion engine and utilizes two fluids having temperatures which are different from each other. In this way, it is possible to set quite well-defined measuring conditions. The fluid flow in the conduit system to be checked is coupled to the temperature sensor in such a manner that the temperature thereof changes with a relatively steep gradient when, starting at a specific time point, the above-mentioned fluid operates to warm the temperature sensor. When the magnitude of the gradient remains below a threshold value, the conduit system checked is evaluated to be operational. The measurement is reliable even though it requires only a single temperature sensor.

Method and arrangement for checking the operability of a fluid-flow

Method and arrangement for diagnosing the open-loop control of the

Method and arrangement for lambda control

The invention is directed to a method for lambda control of an internal combustion engine having a catalyzer and a measuring probe arrangement in front of the catalyzer for emitting a measuring signal and a testing probe arrangement behind the catalyzer for emitting a test signal. The method includes the steps of: forming a ratio between the measuring signal and the test signal at pregiven operating conditions; evaluating said ratio as an estimating quantity for the conversion rate of the catalyzer; and, modifying output values of control parameters in a pregiven controlled manner on the basis of the instantaneous values of said ratio, said output values being applicable for controlling an internal combustion engine having a new catalyzer. This method affords the advantage that it evaluates a catalyzer with the aid of the above-mentioned ratio value and controllably modifies values of control parameters in dependence upon the evaluation ratio. This leads to an especially stable control with low toxic gas discharge.

Method for the lambda control of an internal combustion engine having a

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.

Arrangement for switching in an exhaust-gas probe heater

Control process and apparatus, in particular lambda control

Method and apparatus for setting a tank venting valve

The invention is directed to a system for setting the throttle flap angle for an internal combustion engine. The system sets the idle stop for the idle throttle flap angle and monitors the setting with respect to defects that occur. If the throttle flap is in contact engagement with the idle stop, a contact is actuated which causes a buffer storage of the actual throttle flap angle which thereby represents the position of the idle stop. If then, for example, the idle stop changes during driving operation, its new position is established upon a renewed contact engagement of the throttle flap, by measuring the throttle flap angle. A possible defect can be established from a comparison of actual and desired values and a positioning motor is then appropriately driven to displace the idle stop. This system has the advantage that a defect occurring in the region of the positioning motor is detected without additional circuit complexity.

System for setting the throttle flap angle for an internal combustion

Control system for the air/fuel ratio of an internal combustion engine

Malfunction test procedure and apparatus for idling control

Fuel-metering system for internal combustion engines

The invention is directed to a method for controlling the no-load speed of an internal combustion engine wherein the position of the throttle flap in the intake tube of the engine is varied as a function of the speed of the engine and of a position signal defining the position of the throttle flap. The variation of the throttle flap position takes place, however, only whenever the throttle flap has assumed a specific, predeterminable position and whenever the engine speed has remained virtually constant over a likewise predeterminable period of time. An embodiment in the form of a flow chart is described by means of which the method according to the invention can be realized.

Method for controlling the no-load speed of an internal combustion engine

Device for controlling at least one throttle cross-section at a control

Fuel injection system

Growing community of inventors

Filderstadt, Germany

Gunther Plapp