Reducing the Fuel Consumption by Speed Control of the Air Conditioning Compressor

摘要

For compliance with future emission regulations, fuel consumption of vehicles must be reduced. This is onlypossible by an improvement of each car component, for example the air conditioning system.At the Chemnitz University of Technology, computer programs for detailed simulation of the whole refrigerationcycle and the thermal behavior in the cabin were developed. With these, several modifications concerning the fuelsaving potential can be analyzed and evaluated.Today's air conditioning compressors are driven by a constant transmission ratio by the crankshaft. A gearboxwhich is integrated in the compressor pulley offers a possibility for reducing fuel consumption. Depending on theengine speed and the refrigerating capacity, the compressor could be run at an operating point with lower drivingpower. This speed control was analyzed with the simulation programs mentioned above. The results are shown inthe article.