Method and system for starting a combustion engine

Abstract

A method for starting a combustion engine fitted to a hybrid or dual-mode motor vehicle includes starting an additional motor upon a setpoint torque demanded by a driver of the vehicle, with a view to accelerating the vehicle beyond a threshold speed at which the combustion engine is driven beyond a stalling speed threshold when the combustion engine is mechanically coupled to wheels of the vehicle.

1 - 11 . (canceled) 
     
     
         12 . A method for starting a combustion engine fitted to a hybrid or dual-mode motor vehicle, comprising:
 starting an additional motor upon a setpoint torque demanded by a driver of the vehicle, with a view to accelerating the vehicle beyond a threshold speed at which the combustion engine is driven beyond a stalling speed threshold when said combustion engine is mechanically coupled to wheels of the vehicle.   
     
     
         13 . The method as claimed in  claim 12 , further comprising comparing a speed of the vehicle to the threshold speed. 
     
     
         14 . The method as claimed in  claim 12 , wherein the starting of the combustion engine is carried out simultaneously with a stopping of the additional motor when a speed of the vehicle is substantially greater than or equal to the threshold speed. 
     
     
         15 . The method as claimed in  claim 12 , wherein the coupling of the combustion engine to the wheels of the vehicle is carried out by a closure of a clutch of the vehicle. 
     
     
         16 . The method as claimed in  claim 14 , further comprising a torque switching step, providing that the starting of the combustion engine and the stopping of the additional motor are carried out such that a torque provided to the wheels by the additional motor reduces as a torque provided to the wheels by the combustion engine increases. 
     
     
         17 . The method as claimed in  claim 12 , further comprising configuring the combustion engine, permitting the starting thereof. 
     
     
         18 . The method as claimed in  claim 17 , wherein the step of configuring includes activating a device for supplying fuel to the combustion engine and/or a device for a spark ignition of the vehicle and/or a device for preheating a mixing chamber of the combustion engine. 
     
     
         19 . The method as claimed in  claim 12 , wherein during the coupling, the method includes providing a determination of a suitable gear ratio which permits continuity of the setpoint torque demanded by the driver of the vehicle to be ensured. 
     
     
         20 . A system for starting a combustion engine fitted to a hybrid or dual-mode motor vehicle, comprising:
 hardware and software elements configured to start an additional motor upon a setpoint torque demanded by a driver of the vehicle, with a view to accelerating the vehicle beyond a threshold speed at which the combustion engine is driven beyond a stalling speed threshold when said combustion engine is mechanically coupled to wheels of the vehicle.   
     
     
         21 . The system as claimed in  claim 20 , wherein the hardware elements comprise a control unit, a speed sensor, the additional motor, and a coupling device, the coupling device comprising, a robot-controlled gear box and a clutch and being configured to connect the combustion engine to the wheels of the vehicle by a transmission chain. 
     
     
         22 . A hybrid or dual-mode motor vehicle, comprising:
 a combustion engine including the system as claimed in  claim 20 , wherein the combustion engine and the additional motor are connected to different axles.