Refrigerant Allocation Between Automotive HVAC and Engine Air/Fuel Cooling

摘要

An engine fuel and air cooling system for vehicles exchanges heat between a coolant and air conditioning system refrigerant. The system provides a cabin cooling only mode, a cabin and engine fuel and air cooling mode, and an engine fuel and air cooling only mode. A refrigerant distribution manifold distributes the refrigerant for each mode. The engine fuel and air cooling is provided to a supercharger intercooler to cool air provided to the engine, and to fuel rails to cool fuel provided to the engine. In one embodiment the fuel rails include an inner fuel path surrounded by a coolant path to cool the fuel provided to fuel injectors.

主权项

1. A fuel and air cooling system comprising:a refrigerant system cycling refrigerant sequentially through;
a refrigerant compressor; a refrigerant condenser; parallel refrigerant paths comprising:
a cabin refrigerant path for the refrigerant sequentially through;
a cabin valve;a cabin expansion valve; anda cabin heat exchanger;a fuel and air refrigerant path for the refrigerant sequentially through:
a fuel and air circuit valve;a fuel and air circuit expansion valve; anda refrigerant to coolant heat exchanger the parallel refrigerant paths joining in a return path to the refrigerant compressor;a fuel and air coolant system cycling coolant sequentially through:
a coolant pump; and in parallel:
a refrigerant cooled cooling path for refrigerated coolant sequentially through:
the refrigerant to coolant heat exchanger;an intake air intercooler;a coolant to fuel heat exchanger in contact with injector hats; andback to the coolant pump; andan air cooled cooling path for air cooled coolant sequentially thorough:
an air to coolant heat exchanger;the intake air intercooler;the coolant to fuel heat exchanger in contact with the injector hats; andback to the coolant pump.