DETERMINING A DRIFT IN THE FUEL STATIC FLOW RATE OF A PIEZOELECTRIC INJECTOR OF A MOTOR VEHICLE HEAT ENGINE

摘要

Disclosed is a method for determining a drift in the fuel static flow rate of a piezoelectric injector of a motor vehicle heat engine. The method relies on measurements of the fluid pressure performed in the supply chamber of the injectors in order to calculate a measured static flow rate value. This value is compared with a nominal static flow rate in order to determine the possible existence and amplitude of the drift in the static flow rate. In addition, each pressure measurement is performed when the valve of the injector is closed and the injector is open. In this way, the calculation of the measured static flow rate is not influenced by pressure variation effects which are not relevant for the measurement.