Vehicle air conditioning system
AssigneeDenso Corporation
InventorsHiromi Ohta, Yasuhiko Niimi
Life of this patent
Estimating the term…
Abstract
A vehicle air conditioning system mountable on a vehicle has the control function of stopping a vehicle engine automatically when the vehicle stops (eco-run vehicle). The system includes a variable displacement compressor driven by the vehicle engine, and a stop time of the vehicle engine is ensured when the vehicle stops. When the engine is running, the displacement of the variable displacement compressor is adjusted to control the temperature of an evaporator. When the vehicle engine stop request is issued when the vehicle is stopped, the compressor is kept at its maximum displacement and the vehicle engine is either stopped or activated depending on the temperature of the evaporator to control the on and off modes of the compressor.
Claims6
A vehicle air conditioning system having a control function of issuing a stop request to a vehicle engine to stop the vehicle engine automatically when the vehicle is stopped, the system comprising:
- a compressor capable of changes in discharge capacity, the compressor being driven by the vehicle engine;
- and
- an evaporator for cooling air to be blown into a passenger compartment, the evaporator being arranged on a suction side of said compressor, wherein:
- when the vehicle is running, the discharge capacity of the compressor is adjusted to control said evaporator temperature;
- and
- when the stop request of the vehicle engine is issued when the vehicle is stopped, the discharge capacity of said compressor is kept at or above a predetermined capacity and said vehicle engine is either stopped or activated depending on the temperature of said evaporator to control an on and off mode of the compressor.
Dependencies are inferred from the claim text.