Abstract: The systems and methods described herein aim to leverage the high temperature of a vehicle's engine to heat an interior portion of the vehicle. In one embodiment, a heat transfer fluid is pumped through one or more conduits that has a first portion extending through the vehicle's engine. As the fluid flows through the first portion of conduit, the fluid in the conduit is heated by the engine. The heated fluid flows from the first portion of the conduit to a second portion that is proximate an air handler. The air handler may be configured to blow air over the second portion thereby transferring the heat from the fluid to the air. The heated air may then be provided to the interior portion of the vehicle.

Abstract: A method of charging a compressed air storage tank for a vehicle increases the pressure in the storage tank from a first pressure to a second pressure. The method includes determining the first pressure according to a first detected vehicle engine load, and starting the charge cycle when the pressure detected in the storage tank is at least as low as the first pressure. The method further includes determining the second pressure according to a second detected vehicle engine load, and stopping the charge cycle when the pressure detected in the storage tank is at least as high as the second pressure.