Drivetrain for a hybrid electric vehicle

摘要

A drivetrain for a hybrid-electric vehicle (200), including an engine (210), a first electrical machine (220), a second electrical machine (230), and at least one driveshaft (260). The first (220) and second (230) electrical machines are axial-flux electrical machines. The first electrical machine (220) is arranged to be driven by the engine (210) so as to operate as a generator and to supply electrical power for the second electrical machine (230). The second electrical machine (230) is arranged to receive electrical power so as to operate as a motor and to drive the at least one driveshaft (260). The drivetrain includes a clutch (225) selectively operable to provide inter-engagement between the rotor of the first electrical machine (220) and the rotor of the second electrical machine (230) to transmit rotary power therebetween.

主权项

1. A drivetrain for a hybrid-electric vehicle, the drivetrain comprising:
an internal combustion engine having a crankshaft; a first axial flux electrical machine located axially adjacent the internal combustion engine and having a rotor directly coupled with the crankshaft of the internal combustion engine, the rotor being arranged to be driven by the crankshaft of the internal combustion engine; a first clutch mounted axially adjacent the first axial flux electrical machine, wherein the first clutch is mechanically and directly connected to the rotor of the first axial flux electrical machine; a second axial flux electrical machine mounted axially adjacent the first clutch and operable to receive electrical power and to operate as a motor, the first clutch thereby being located axially between the first and second axial flux electrical machines, and being selectively operable to provide inter-engagement between the rotor of the first axial flux electrical machine and a rotor of the second axial flux electrical machine; a second clutch located axially adjacent the second axial flux electrical machine, wherein the second clutch is mechanically and directly connected to the rotor of the second axial flux electrical machine; a gearbox located axially adjacent the second clutch, the second clutch thereby being located axially between the second axial flux electrical machine and the gearbox, and being selectively operable to provide inter-engagement between the rotor of the second axial flux electrical machine and an input driveshaft of the gearbox, the gearbox having an output driveshaft that provides an output driveshaft for transmitting rotary power from the drivetrain; wherein the first clutch and the second clutch directly couple the rotor of the first axial flux electrical machine to the rotor of the second axial flux electrical machine; wherein respective output shafts of the engine, the first axial flux electrical machine, the first clutch, the second axial flux electrical machine, and the second clutch are substantially coaxial with the input driveshaft of the gearbox; and wherein the internal combustion engine, the first axial flux electrical machine, the first clutch, the second axial flux electrical machine, the second clutch, and the gearbox are arranged in a series along a longitudinal axis of the drivetrain.