Abstract: Methods and systems are described for controlling output of a fuel cell that generates electrical power for an electric machine that propels a vehicle. In one example, a driver demand power reduction is anticipated and output of the fuel cell is adjusted before the driver demand power is reduced so that a greater amount of electric charge may be stored in an electric energy storage device.

Abstract: Methods and systems are described for controlling output of a fuel cell that generates electrical power for an electric machine that propels a vehicle. In one example, a driver demand power reduction is anticipated and output of the fuel cell is adjusted before the driver demand power is reduced so that a greater amount of electric charge may be stored in an electric energy storage device.

Abstract: A fuel cell stack is housed within a fuel cell stack enclosure. Air is used to ventilate the fuel cell stack enclosure. The air may be pulled from an air stream used to cool a high voltage battery. The air may also be pulled from a vehicle compartment such as a vehicle trunk or vehicle cabin. Filters are used to remove particulate matter from the air.

Abstract: An exemplary cooling system includes, among other things, a first pump to supply coolant to a cylinder head or cylinder block of an engine, a second pump to supply coolant to a cylinder block or cylinder head of the engine. A control unit governs the first pump and second pump. Fluid return channels recirculate coolant to the pumps. The first and second pumps are arranged to backflow coolant through the engine.

Abstract: A vehicle climate control system includes a condenser, a compressor, and a loop fluidly connecting the condenser and compressor. The system also includes a valve arrangement disposed within the loop. The valve arrangement includes a thermal expansion valve integrated with a solenoid valve. The solenoid valve has a powered closed state to prevent fluid flow into an evaporator and a non-powered open state to allow fluid flow through the thermal expansion valve into the evaporator. The evaporator is for cooling a cabin. The system further includes a controller programmed to, in response to a request for cooling of the cabin, command the solenoid valve from the powered state to the non-powered state.

Abstract: A vehicle includes an engine and a non-selectable-gear transmission having an electric machine mechanically coupled to the engine. The vehicle may have one or more controllers programmed to, in response to a request for passive neutral mode, pull-down the engine and inhibit engine pull-up while disabling the electric machine such that the vehicle coasts with minimal rotational inertia and electrical losses. The one or more controllers may be further programmed to, in response to a subsequent request for drive mode during the passive neutral mode, permit engine pull-up while enabling the electric machine such that the vehicle resumes drive.

Abstract: A vehicle includes an engine and a non-selectable-gear transmission having an electric machine mechanically coupled to the engine. The vehicle may have one or more controllers programmed to, in response to a request for passive neutral mode, pull-down the engine and inhibit engine pull-up while disabling the electric machine such that the vehicle coasts with minimal rotational inertia and electrical losses. The one or more controllers may be further programmed to, in response to a subsequent request for drive mode during the passive neutral mode, permit engine pull-up while enabling the electric machine such that the vehicle resumes drive.

Abstract: An exemplary cooling system includes, among other things, a first pump to supply coolant to a cylinder head of an engine, a second pump to supply coolant to a cylinder block of the engine, a control unit that governs the first pump and second pump, and at least two fluid return channels to recirculate coolant to the pumps. The first and second pumps are arranged to backflow coolant through the engine.

Abstract: A fuel cell stack is housed within a fuel cell stack enclosure. Air is used to ventilate the fuel cell stack enclosure. The air may be pulled from an air stream used to cool a high voltage battery. The air may also be pulled from a vehicle compartment such as a vehicle trunk or vehicle cabin. Filters are used to remove particulate matter from the air.