HVAC controls for a vehicle with start-stop engine operation
First Claim
1. A control system for a start-stop vehicle engine having an HVAC system, said control system comprising:
- a powertrain control module;
a signal generator, in communication with said powertrain control module, for indicating demand from an HVAC control;
a signal generator, in communication with said powertrain control module, for indicating fan speed;
a signal generator, in communication with said powertrain control module, for indicating ambient air temperature; and
wherein said control module operably connected to said HVAC control signal generator, said fan speed signal generator, and said temperature sensor signal generator, wherein said control module determines engine operation based on information from said signal generators.
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Abstract
A system and method for determining engine operation for a start-stop vehicle is provided. The start-stop vehicle includes an HVAC system. The engine operation control system includes an HVAC control head for indicating demand, a sensor for indicating fan speed, at least one sensor for indicating ambient air temperature, and a powertrain control module in communication with the HVAC control head and the sensors. The powertrain control module determines engine operation. The method for controlling engine operation includes the steps of determining HVAC demand, fan speed, and ambient temperature to a control module. The control module determines engine operation based on the signals from the signal generators of the HVAC demand, the fan speed, and the ambient temperature.
62 Citations
18 Claims
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1. A control system for a start-stop vehicle engine having an HVAC system, said control system comprising:
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a powertrain control module;
a signal generator, in communication with said powertrain control module, for indicating demand from an HVAC control;
a signal generator, in communication with said powertrain control module, for indicating fan speed;
a signal generator, in communication with said powertrain control module, for indicating ambient air temperature; and
wherein said control module operably connected to said HVAC control signal generator, said fan speed signal generator, and said temperature sensor signal generator, wherein said control module determines engine operation based on information from said signal generators. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for controlling engine operation of a start-stop vehicle having an HVAC system, said HVAC system comprising an HVAC control for indicating demand, a fan, an air conditioning unit, a heating unit, a temperature sensor, a powertrain control module, and an engine control unit, said method comprising the steps of:
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determining HVAC demand from said HVAC control and providing a signal indicative thereof to said control module;
determining fan speed of said fan and providing a signal indicative thereof to said control module;
determining ambient air temperature from said temperature sensor and providing a signal indicative thereof to said control module;
generating an engine control signal in said control module based on information indicative of HVAC demand, fan speed and temperature, and sending the engine control signal to said engine control unit to effect operation. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. An engine operation control system for a start-stop vehicle having an HVAC system, said HVAC system comprising an HVAC control for indicating demand, a fan, an air conditioning unit, a heating unit, a temperature sensor, a powertrain control module, and an engine control unit, said system comprising:
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means for determining HVAC demand and providing a signal indicative thereof;
means for determining fan speed and providing a signal indicative thereof;
means for determining ambient air temperature and providing a signal indicative thereof; and
means in communication with said means for determining HVAC demand, means for determining fan speed, and means for determining ambient air temperature, for generating an engine control signal in said control module based on information indicative of HVAC demand, fan speed and temperature, and sending the engine control signal to said engine control unit to effect operation.
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Specification