Abstract: A clutch system includes a rotary input member, a wrap spring clutch and a rotary output member. The wrap spring clutch has a first end, a second end, and a plurality of coils. The stiffness of the wrap spring clutch is selected such that, when transmitting less than a selected coil engagement torque, the clutch system transmits torque helically from the rotary input member, to the second end, helically through the wrap spring clutch to the first end, and into the rotary output member. When transmitting more than the selected coil engagement torque, the clutch system transmits torque in parallel from the rotary input member, to the second end, helically through the wrap spring clutch to the first end, and into the rotary output member, and from the rotary input member through the coil engagement surface, to the first end, and into the rotary output member.

Abstract: In an aspect, a heater module is provided for a heater for a thermal management system for an EV. The module includes a housing having an inlet and an outlet, a module inlet header in fluid communication with the inlet so as to receive a coolant from the inlet, a module outlet header that is in fluid communication with the outlet so as to transport the coolant to the module outlet, a plurality of module coolant conduits extending between the module inlet header and the outlet header, wherein there is a PCM storage space defined in the housing between the module coolant conduits, thermal conductors extending from the plurality of module coolant conduits into the PCM storage space, and a quantity of phase-change material in the PCM storage space and in contact with the plurality of thermal conductors. The housing is positioned in engagement with an electric heating element.

Abstract: A clutch system includes a rotary input member, a wrap spring clutch and a rotary output member. The wrap spring clutch has a first end, a second end, and a plurality of coils. The stiffness of the wrap spring clutch is selected such that, when transmitting less than a selected coil engagement torque, the clutch system transmits torque helically from the rotary input member, to the second end, helically through the wrap spring clutch to the first end, and into the rotary output member. When transmitting more than the selected coil engagement torque, the clutch system transmits torque in parallel from the rotary input member, to the second end, helically through the wrap spring clutch to the first end, and into the rotary output member, and from the rotary input member through the coil engagement surface, to the first end, and into the rotary output member.