Method for controlling the power supply of solenoid fuel injectors in a hybrid motor vehicle

A method for controlling the electrical power supply of solenoid fuel injectors for a hybrid automotive vehicle, including both an internal combustion propulsion engine and an electric motor, said internal combustion propulsion engine performing multiple fuel injections per cylinder within an operating cycle, said hybrid automotive vehicle being provided with a first electrical network powered at a first DC voltage that is intended to supply power to a motor control of the internal combustion propulsion engine and a second electrical network powered at a second DC voltage, said second DC voltage being higher than the first DC voltage and intended to supply power to the electric motor, said method comprising:

• i. connecting the second DC voltage to the electrical power supply of the solenoid fuel injectors;
• ii. reading the value of the second DC voltage;
• iii. adapting the control parameters of the solenoid fuel injectors on the basis of the value read in step ii, of an engine speed of the internal combustion propulsion engine, of a temperature of the internal combustion propulsion engine and of an injection pressure upstream of the solenoid fuel injectors;
• iv. controlling the solenoid fuel injectors using the second DC voltage, wherein:
• iv.a. there is no change in the injector control parameters when the value is higher than or equal to a threshold value;
• and
• iv.b. at least one of the injector control parameters is changed when the value is lower than the threshold value, the at least one of the injector control parameters of the solenoid injectors including fuel injection time;
• v. performing a consistency test of the adapted control parameters, the consistency test including determining if a total fuel injection time of the adapted control parameters is longer than a time available for the operating cycle of the internal combustion propulsion engine;
• and
• vi. lowering a number of the multiple fuel injections when the consistency test of the adapted control parameters fails.