Study on EGR Technology Routes of Vehicle Engine - A Review

Abstract

An introduction was given to the basic structure principles and testing programs of EGR system. The technical key elements which can improve the comprehensive performances of EGR system were put forward, and these elements were composed of the choice of high pressure loop (HPL) and low pressure loop (LPL) EGR system, the design of EGR valve, the design of EGR cooling system, the uniformity of EGR in every cylinder and the matching with VGT system. Finally, a sum that EGR technical requirements meet different emission regulations was established