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Vehicle heating and air conditioning system including a dual mode manual temperature selector

  • US 6,698,512 B2
  • Filed: 01/07/2002
  • Issued: 03/02/2004
  • Est. Priority Date: 01/07/2002
  • Status: Expired due to Term
First Claim
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1. A motor vehicle heating and air conditioning system including a refrigerant compressor, an evaporator, and a temperature control mechanism positionable to control re-heating of air exiting the evaporator, the system comprising:

  • a temperature selector manually adjustable to select a temperature setting, and mechanically coupled to the temperature control mechanism for positioning the temperature control mechanism as a function of the selected temperature setting, the temperature selector being selectively operable in;

    (1) a normal mode wherein adjustment of the temperature selector produces a corresponding change in re-heating regardless of the temperature setting, or (2) a high fuel efficiency mode wherein adjustment of the temperature selector produces no change in re-heating when the temperature setting is within a designated range of temperature settings including a full cold temperature setting, and a corresponding change in re-heating when the temperature setting is outside said designated range; and

    a controller effective when the high fuel efficiency mode is selected and the temperature setting is within said designated range to control a capacity of said refrigerant compressor based on the temperature setting.

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