A system for operating an air conditioning system of a pure electric vehicle having wheels that drive the pure electric vehicle, the system comprising:
- an electric motor having regenerative capabilities connected to a battery;
- a disconnect mechanism disposed between the electric motor and at least one of the wheels that drive the pure electric vehicle, the disconnect mechanism having an open state and a closed state;
- an AC compressor connected to the electric motor via a clutch;
- wherein the system includes a recuperation state, in which the disconnect mechanism is closed and the clutch is closed, and recuperation energy from the wheels and energy from the electric motor drive the compressor;
- wherein the system includes a stand-still state, in which the disconnect mechanism is open and the clutch is closed, and the electric motor drives the compressor;
- wherein the system includes a drive operation state, in which the disconnect mechanism is closed and the clutch is open, and the compressor is de-coupled from the electric motor;
- wherein the system provides cooling to a vehicle cabin of the pure electric vehicle during the drive operation state when the compressor is not being driven by the electric motor;
- a first torque transfer mechanism coupled to the electric motor via a first shaft at the output of the electric motor, wherein rotation of the electric motor causes rotation of the first torque transfer mechanism via the first shaft;
- a second torque transfer mechanism coupled to a second shaft for driving the wheels, wherein rotation of the second torque transfer mechanism causes rotation of the second shaft, wherein the second torque transfer mechanism is selectively coupled to the first torque transfer mechanism via the disconnect mechanism;
- wherein the disconnect mechanism is disposed between the first torque transfer mechanism and the second torque transfer mechanism;
- wherein the clutch is disposed between the first torque transfer mechanism and the compressor;
- and
- wherein the first torque transfer mechanism includes a small diameter element at the first shaft of the electric motor coupled to a large diameter element at an offset axis relative to the first shaft, and the second torque transfer mechanism includes a small diameter element at the offset axis coupled to a large diameter element at the second shaft, wherein the large diameter element of the first torque transfer mechanism is selectively coupled to the small diameter element of the second torque transfer mechanism via the disconnect mechanism;
- wherein the electric motor provides a motor output that drives both the compressor and the wheels that drive the pure electric vehicle, wherein, from the motor output, the compressor receives a lower torque and a higher rotational speed relative to the wheels that drive the pure electric vehicle when the disconnect mechanism is closed and the clutch is closed based on the gear ratios defined by the first torque transfer mechanism and the second torque transfer mechanism;
- wherein, in the standstill state with the electric motor driving the compressor and the disconnect mechanism open, the second torque transfer mechanism is not driven, such that a portion of a torque transmission chain between the wheels and the motor output is not driven by the motor output and the wheels are not driven by the motor output to drive the pure electric vehicle.