Patent ID: 11872883
Assignee: DAYCO EUROPE S.R.L.
Field: Transport (Mechanical engineering)
Classification: CPC B  F  Y | IPC B  F

Claim 0:
1. Powertrain for a vehicle comprising:
an internal combustion engine provided with a crankshaft;
a first electric machine operating at least as a starter motor and located on a first side of the internal combustion engine facing in use towards a transmission (T) of the vehicle;
an accessory drive comprising:
a first pulley connected to one end of the crankshaft on a second side of the engine opposite in use to the transmission of the vehicle;
a second electric machine located on the second side of the internal combustion engine;
a second pulley connected to the second electric machine;
a third pulley connected to an accessory of the internal combustion engine,
a belt connecting the first, the second, and the third pulleys together to rotate in the same direction of rotation (R) as the crankshaft; and
a tensioner acting on a span of the belt between the second pulley and the third pulley; and

a control unit
programmed to control the second electric machine so as to transmit an active torque to said second pulley during start-up of the internal combustion engine by means of the first electric machine, so as to maintain a predetermined minimum tension level in a span of the belt comprised between the first and the second pulleys in said direction of rotation.