Device and method for controlling a module for heating a plurality of injectors

A device for controlling a module configured to heat a plurality of fuel injectors of an engine of a vehicle, said heating module including a plurality of electromagnetic induction devices, each of said electromagnetic induction devices being connected to an injector of the plurality of fuel injectors and being configured, when an electric excitation current passes through said electromagnetic induction devices, to heat said injector by induction, said device comprising:

• a power generator configured to generate an electric supply current;
• and
• a phase shift system configured to generate, from the electric supply current generated by the power generator, a plurality of electric excitation currents phase shifted relative to one another and materialized by electric excitation current signals, each of said electric excitation currents supplying at least one of the electromagnetic induction devices of the plurality of electromagnetic induction devices, the phase shift system comprising
• a number of H bridges equal to the number of injectors equipped with electromagnetic induction devices, and
• a controller configured to control the delivery of n electric excitation current signals phase shifted
• 180
• ∘
• n
• via said H bridges, each H bridge enabling delivery of an electric excitation alternating current signal to an electromagnetic induction device at a moment determined by said controller,
• wherein the phase shift system is configured to phase shift the electric excitation current signals such that, for each of a plurality of duty cycles, the sum of the absolute values of the amplitudes of said signals is equal to a constant value at any given time,
• wherein an electric excitation current delivered by an H bridge is an alternating current of which the half-period is defined by one of the duty cycles, said duty cycle being selected from one of the values
• p
• ×
• 100
• ⁢
• %
• n
• where p is natural number between 0 and n.