Continental Automotive France

Siemens Vdo Automotive Corporation

Siemens Aktiengesellschaft

Siemens Automotive S.a.

Roger Rouphael

Laure Carbonne

Patrick Cremona

Stephan Bolz

Frédéric Galtier

Mark Elliott

Gerhard Fischer

Thomas Haug

Markus Amtmann

Alain Gonzalez

Jeroen Van-Est

Benoit Hamm

Patrick Vibert

Robertus Vingerhoeds

In a method relating to an engine with n cylinders, fuel is injected in a predetermined order into the cylinders in a manner which is synchronized with the position of the pistons of the engine. The method includes the following steps after start-up: injection into m cylinders in a predetermined order of injection; measurement of engine speed and/or acceleration; continuation of injection in a predetermined order of injection if engine speed and/or acceleration exceed(s) a predetermined threshold; continuation of injection with a delay in the event of the contrary. The method can be used with respect to the start-up of a direct injection engine.

Method for synchronizing injection with the engine phase in an electric injector controlled engine

A method for determining a value representative of the pressure in a combustion chamber of an internal combustion engine, includes the following steps:

Method for determining a value representative of the pressure in a combustion chamber of an internal combustion engine

A method for determining the exhaust pressure (P) of a turbocharged internal combustion engine, including a solenoid by-pass valve for the exhaust gas, characterized in that an exhaust pressure (P) is determined as a function of the inlet air flow to the engine, (A), the engine speed (R) and the degree of opening of the solenoid exhaust by-pass valve (T), by interpolation from a reference map having exhaust gas pressure values (P) for given inlet air flow values (A), the engine speed (R) and the degree of opening of the solenoid exhaust by-pass valve (T), and the exhaust pressure determined by the interpolation (P) is corrected as a function of ambient pressure values (P, P).

Method for determining the exhaust pressure of a turbocharged internal combustion engine

An engine air supply control method relating to a turbocharged engine including an intake manifold () which is disposed downstream of the compressor of the turbocharger () and an exhaust manifold () which is disposed upstream of the turbine of the turbocharger (). The method includes determining the mass air flow supplying the engine and/or the pressure in the intake manifold () and the temperature in the exhaust manifold. The pressure in the exhaust manifold () is determined as a function of the pressure in the intake manifold (), the engine speed, the temperatures in the cylinders () and in the exhaust manifold (), the pressure in the intake manifold () being optionally determined from the mass air flow. Inversely, the pressure in the intake manifold.

Engine air supply control method which is intended, for example, for the control of a turbocharged engine

The invention relates to a method for determining the speed of a vehicle with the aid of sensors on board said vehicle, whereby the vehicle is moved by an engine () coupled to a gear box (), wherein the speed is determined by multiplying the value of the engine rpm obtained by a sensor by a predetermined coefficient as a function of the engaged gearbox ratio. The engaged gearbox ratio is determined during a change in gearbox ratio by dividing the values of the engine rpm measured just before and after the ratio change by each another and by comparing the result of said division with predetermined stored values which are dependent upon the gear box () with which the vehicle is fitted. The invention can be used to determine the speed of a vehicle in a degraded mode i.e. in the event of a speed sensor failure.

Method for determining an engaged ratio in a gearbox

This method is intended for a turbocharged internal combustion engine having an electrically controlled throttle valve. The turbocharger has a waste gate for regulating its pressure. The position of the valve and the extent to which the gate is open are controlled according to two distinct modes of operation. In the first mode, the position of the valve is predetermined as a function of engine control and operating parameters, and the position of the gate is used to regulate the air flow rate. In the second mode, the extent to which the gate is open is predetermined as a function of engine control and operating parameters, and the position of the valve is used to regulate the air flow rate. Which mode is used is gauged by an electronic device which chooses the mode of operation to be implemented as a function of predetermined conditions stored in memory.

Method and device for controlling the airflow supplied to an internal combustion engine

A method of determining the ambient pressure which is performed in a turbocharged engine having a throttle which is disposed between a heat exchange chamber, known as an intercooler, and an intake manifold. A compressor is provided in order to compress the air in the heat exchange chamber, and the engine is equipped with elements for indicating the pressure in the chamber. The method includes the following steps: detecting the opening of the throttle; measuring the pressure (MAP_UP) in the heat exchange chamber; and determining the ambient pressure (AMP) by measuring the pressure (MAP_UP) in the heat exchange chamber at a predetermined moment which is defined in relation to a characteristic point of the curve () representing the pressure (MAP_UP) in the heat exchange chamber as a function of time, the ambient pressure (AMP) being equal to the pressure measured in the heat exchange chamber.

Method of measuring ambient pressure in a turbocharged engine

The operation of an internal combustion engine as a function of the air pressure in at least one engine air inlet manifold ( ), in which a campaign of bench tests is carried out on the engine in order to establish a law governing the evolution of the air flow rate MAF of the air entering a cylinder ( ) of this engine, as a function of the admission pressure MAP taken from the inlet manifold, this being done at various engine speeds and then, on an operating engine, the air pressure is measured in the engine inlet manifold, a corresponding air pressure MAP value is supplied to a computer ( ) that is also supplied the engine speed corresponding to it, and, from this, the air flow rate is deduced as a function of the established evolution law.

Method and computer for determining a setting for correct operation of an internal combustion engine

A method for monitoring the operation of sensors in an internal combustion engine includes providing reference values from output signals from a sensor. A sliding average (comparison value) is calculated from a relatively large number of reference values. The operation of the sensor is diagnosed as a function of the amplitude distribution of the reference values about the comparison value. If a malfunction is found, a fault message is transmitted to the driver and reversionary running of the internal combustion engine is started. An electric controller operating in accordance with the sensor is also provided.

Growing community of inventors

L'Union, France

Roger Rouphael