Patent ID: 8401770
Filing Date: 2013-03-19
Classification: F02D,F02N,H02P

Abstract:
1. A method for controlling a start time (Tdem) of a heat engine ( 2 ) of a vehicle, said engine ( 2 ) being mechanically coupled to a polyphase rotary electrical machine ( 3 ) connected to an on-board electrical network, said start time (Tdem) being a time interval during which said engine ( 2 ) reaches a reference rotation speed from a stop, said rotary electrical machine comprising a rotor with an inductor ( 8 ), and phase windings; said method comprising the step of carrying out pre-fluxing by establishing an excitation current in said inductor ( said predetermined pre-fluxing time (Tpref) being a function of a variable voltage (Vbat+X) of said on-board electrical network when said variable voltage (Vbat+X) is within a nominal voltage range (V said predetermined pre-fluxing time (Tpref) is increased when said voltage (Vbat+X) is decreased while remaining within said nominal voltage range (V said predetermined pre-fluxing time (Tpref) is decreased when said voltage (Vbat+X) is increased while remaining within said nominal voltage range (V said variable voltage (Vbat+X) being higher than a voltage Vbat of an on-board battery of said vehicle.