Robert Boschgmbh

The Whitaker Corporation

Lisa Draxlmaier Gmbh

Matthias Kuesell

Werner Herden

Walter Benedikt

Helmut Denz

Martin Klenk

Manfred Vogel

Kurt Weiblen

Wolfgang Schmidt

Albert Gerhard

Frank Stanglmeier

Steffen Schmidt

Hubert Bischof

Ernst Wild

Klaus Joos

Klaus Ries-Mueller

Gheorghe Hotea

Winfried Moser

Markus Amler

Jens Wolber

Thomas Frenz

Jiri Marek

Hansjoerg Bochum

Horst Muenzel

Johann Konrad

Frank Bantien

Wolfgang Wagner

Andreas Duell

Josef Tosch

Uwe Lipphardt

Fritz Josef Kourimsky

Gerard Melchior

Robert Neuhauser

Karl Bender

Kay Borchert

Eckhart Damson

Hans-Otto Geltsch

The invention relates to a method and an arrangement for calibrating a pressure sensor ( ) of a fuel-metering system of an internal combustion engine wherein the fuel-metering system includes: a high-pressure pump ( ) for pumping fuel from a low-pressure region (ND) into a high-pressure region (HD) injectors ( ) for metering the fuel from the high-pressure region (HD) into combustion chambers ( ) of the internal combustion engine with the injectors ( ) being drivable in dependence upon operating characteristic variables, and the pressure sensor ( ) for measuring the pressure in the high-pressure region (HD). To calibrate the pressure sensor ( ) so that the offset error is minimized, it is suggested that a pressure, which is present in the high-pressure region (HD), is applied as a reference pressure; that the pressure, which is present in the high-pressure region (HD), is measured as the sensor pressure by the pressure sensor ( ); and, that the characteristic line of the pressure sensor ( ) is so corrected that the difference of reference pressure and sensor pressure is minimized.

Method and device for calibrating a pressure sensor

A method of operating an internal combustion engine of a motor vehicle provided with a vacuum accumulator which provides an auxiliary energy required for at least one servo function of the internal combustion engine in form of a vacuum and which is acted upon by a vacuum acting in a suction pipe of the internal combustion engine. The method computes a pressure acting in the vacuum accumulator, supplies mass flows to the vacuum accumulator when at least one servo function is performed, and withdraws the mass flows from the vacuum accumulator when a pressure acting in the suction pipe is smaller than the pressure acting in the vacuum accumulator. The pressure acting in the vacuum accumulator is computed from a mass balance of the mass flows supplied to the vacuum accumulator and withdrawn from the vacuum accumulator.

Method of and device for operating a vacuum accumulator of an internal combustion engine, provided for servo function

The device for determining load in internal combustion engines includes a pressure sensor connected with a combustion chamber of an internal combustion engine which produces an output signal depending on a combustion chamber pressure, a crankshaft angle sensor for detection of a crankshaft angle of the internal combustion engine and a processor for determining a load of the engine from relative values of the output signal of the pressure sensor at predetermined crankshaft angles. The processor includes a device for determining the load from a pressure difference between combustion chamber pressures measured at two different predetermined crankshaft angles (x1, x2) or from two integrated pressure values. The integrated relative pressure values are obtained by integration of a pressure-proportional output signal of the pressure sensor between two different predetermined crankshaft angles.

Device for determining load in an internal combustion engine

Internal combustion engine

Sensor connector

Process for controlling the warm-up in an internal combustion engine wherein the combustion chamber pressure is obtained and evaluated, so that, using the evaluation of the combustion chamber pressure signal, the combustion is controlled so that combustion is not completed at the time the exhaust valve opens during warm-up.

Process for controlling the warm-up in an internal combustion engine

In a process for controlling the warm-up in an internal combustion engine, the combustion chamber pressure is evaluated, so that the warm-up period is divided into first and second phases that are controlled differently.

A pressure sensor for pressure detection in a combustion chamber of internal combustion engines of motor vehicles has a housing provided with an opening, a measuring element, a plunger arranged in the opening of the housing and having one end acting on the measuring element so that a measuring signal is produced proportionally to a pressure to be determined, the plunger directly abutting against the measuring element and having a material with a yielding point which is smaller than a breaking limit of a material of the measuring element, the end of the plunger which acts on the measuring element is spherical and abuts against the measuring element with such a contact surface that occurring stresses do not exceed a predetermined nominal value.

Pressure sensor for pressure detection in combustion chamber of internal

Silicon chip for use in a force-detection sensor

In a pressure sensor, a force is transferred via a pressure plunger end made of relatively hard material onto a measurement element including a sensor membrane on a support. The sensor membrane is part of a micromechanical arrangement made of silicon. A metal structure made of a metal of lower hardness compared with the hardness of the material of the pressure plunger end is applied onto the sensor membrane. This metal structure can be impressed and plastically deformed with increased force by the contact surface of the pressure plunger end, in such a way that conforming contact of the contact surface is achieved, and potential angular errors are compensated for.

Pressure sensor

Pressure sensor for detecting the pressure in the combustion chamber of

Growing community of inventors

Kornwestheim, Germany

Matthias Kuesell