Abstract
Turbocharger dynamics and control of the EGR rate are major problems of supercharged gasoline engines. Two solutions were developed at Lucerne University of Applied Sciences and tested on a “smart” 3-cylinder engine. To boost inlet manifold pressure during fast load demands, compressed air from a small pressure vessel is temporarily applied to the compressor inlet. The EGR rate is controlled by reducing the injected fuel, while the EGR valve serves to control the A/F ratio.
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