Control system for vehicular air conditioning compressor
AssigneeNissan Motor Co., Ltd.
InventorYukio Sakurai
Life of this patent
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Abstract
A control system for controlling operation of a compressor of a vehicular air conditioning system. The control system comprises an electromagnetic clutch which is adapted to disengage so as to cut the drivable connection of the compressor with an engine. The electromagnetic clutch is in an electric circuit including a first switch adapted to close in the overheat condition of a fuel system, and a second switch adapted to close at an abrupt vehicle acceleration. Additionally, a timer is provided in the electric circuit to maintain the disengaged state of the electromagnetic clutch for a predetermined time upon close of both the first and second switches thereby to stop the operation of the compressor, thus improving vehicle acceleration performance under the fuel system overheat condition.
Claims15
A control system for an air conditioning compressor of an air conditioning system for a vehicle, said control system comprising:
- first means for detecting overheat condition of a fuel system of the vehicle;
- second means for detecting abrupt vehicle acceleration including
- a pressure responsive switch adapted to close in response to an intake manifold vacuum of the engine being below a predetermined level;
- and
- means for stopping operation of said air conditioning compressor for a first predtermined time upon detection of both said overheat condition and said abrupt vehicle acceleration.
Dependencies are inferred from the claim text.