Effects of EGR on Cold Starting Characteristics of a Direct Injection Diesel Engine

Abstract

One method of improving the cold starting characteristics in a direct injection diesel engine, is that named TSCE (Two Stage Combustion EGR). It prevents the induction of a fresh air to half of the cylinders of the engine, and uses the exhaust gas from the already operating cylinders. This quickens the rise in intake gas temperature of the second stage cylinders, shortens the starting time, and guarantees a stable combustion at the earliest possible time. As the result, Hydrocarbon mass emission and Aldehyde concentration, i.e., the main factors of exhaust pollution, were reduced to one third the amount produced by the usual method of operation, when air, oil and water temperature were -10 to -12 °C.