Study on the Apply Characteristics to the Gasoline Engine of Exhaust Heat Recovery Device Counterflow

Abstract

: The purpose of this study is to investigate the performance characteristics of the counterflow exhaust heat recovery device for the applied gasoline engines. The EHRS device is installed behind the catalyst. This study investigates the engine warm-up characteristic, the exhaust noise characteristic, the back-pressure characteristic . The engine warm-up characteristics is (load 0%, load 10%, load 20%) in (idle, 1000rpm, 1500rpm, 2000rpm, 2500rpm) conditions by measuring the time it warmed up, coolant temperature (25°C~80°C) until the performance evaluation is performed. The wide open throttle and the coast down the exhaust noise and the back-pressure characteristic experiment repeated twice. The test conditions is 950rpm~6,050rpm proceed experiment repeated 3-5 times. Load 0% idle conditions except the results improved engine warm-up characteristics. The exhaust noise obtain similar results the BASE+EHRS W/O_FRT_MUFF with BASE and back-pressure to obtain similar results BASE+EHRS W/O_FRT_ MUFF with BASE+EHRS.

Effects of the exhaust gas heat recovery system with a plate heat exchanger on the warm-up performance characteristics of the gasoline engine

“…Park et al [5] experimentally conducted the effects of warm-up performance of the gasoline engine with the circular flow typedEHRS. They showed that under engine high load condition, the remarkable heat recovery efficiency improvement was observed.Shin et al [6] investigated the performance characteristics of the counter flow typed EHRS, such as warm-up, the exhaust noise and the back pressure of the for the gasoline engine. The warm-up period of the engine with the EHRS was shorted for the engine test conditions except at idle condition, although the back pressure wasslightly increased.…”