Vitesco Technologies Gmbh

Jérémie Memain

Stéphane Eloy

Nicolas Girard

Thibaut Polidore

George Weaver

Lionel Treton

Disclosed is a method for controlling an engine torque for a diesel engine, characterized in that the engine torque control is implemented in an injection system. The injection system in question includes a high-pressure pump controlled by an engine control unit, the high-pressure pump supplying a fuel supply rail, the pump being dimensioned to be capable of delivering a capacity volume of compressible fuel for each combustion cycle of the diesel engine. It also includes a pressure sensor for measuring the pressure of the fuel in the fuel rail.

Diagnosis of the condition of a pump in an injection system for diesel engine

Engine control method for protecting the engine during reverse rotation, and involving the following steps: when a first prediction of the engine speed at a next top dead center is below a predetermined lower threshold, inhibiting the next combustion for this cylinder of the engine, and when the first prediction of the engine speed is between the predetermined lower threshold and a predetermined upper threshold, and the engine reaches a second measurement predetermined angular position which is subsequent to the first measurement position, activating the prediction means again in order to obtain a second prediction of the engine speed at the next top dead center.

Engine control method for protecting an internal combustion engine during reverse rotation

Disclosed is a method for the diagnosis of a digital valve in a fuel injection system. In the diagnosis, a diagnosis current is applied to the digital valve with an intensity and for a hold time that are predetermined by experiment on digital valves identified as being fault-free, this intensity and this time being recognized as being sufficient for an inflection on a curve of the closing current to be detected in the hold time. Measurements are taken at more than 3 kHz of the diagnosis current added to the induced current in the hold time. When an inflection on the current curve is detected in this hold time, it is concluded that the valve is working correctly. When no inflection on the curve is detected in this hold time, it is concluded that the valve is faulty.

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Toulouse, France

Jérémie Memain