Abstract:

In order to overcome the deterioration of engine performance at plateau, several forms of supercharged programs were discussed. A new project called composite adjustable supercharged program(CASP) was proposed, and the relevant simulation was carried out. A V-type supercharged diesel engine with 8 cylinders was adopted to establish the numerical models. Two plateau strategies and CASP were compared. The results demonstrate that CASP is effective to enhance the performance of engine at low speed dramatically. The rated power of CASP at plateau can recover to 89.7% of the plain level, and the maximal torque is decreased by 3.7%, while the speed adaptive coefficient rises up to 1.56.  After all, CASP is an effective project to recover the power of diesel engine at plateau.

Key words: power machinery engineering, composite supercharge, composite adjustable supercharged program, power recovery at plateau