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Effects of Warm-up Performance on SI Engine with Exhaust Heat Recovery System  

Park, Kyoun-Suk (Department of Mechanical Engineering, Kyunghee University)
Suh, Ho-Cheol (R&D Center, Sejong Industrial Co. Ltd.)
Park, Sun-Hong (Department of Mechanical Engineering, Graduate School, Kyunghee University)
Kim, In-Tae (Department of Mechanical Engineering, Graduate School, Kyunghee University)
Jang, Sung-Wook (R&D Center, Sejong Industrial Co. Ltd.)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.19, no.6, 2011 , pp. 53-60 More about this Journal
Abstract
The effect of exhaust heat recovery system can be evaluated by two well known method. First method is to measure the time duration from engine start under cold coolant temperature till coolant get warmed. By this methodology coolant warming duration can be index of warm-up effect. Second method is to analyze heat balance of the engine during warm-up phase under steady engine operation so that wasted energy by losses such as cooling and exhaust can be index of warm-up effect. This study focused on evaluation of warming-up effect by both methodology above mentioned using 2L SI engine under from idle to 2000rpm steady condition. Results, idle operation showed low heat recovery efficiency but under higher engine speed condition, remarkable heat recovery efficiency improvement was observed. In 2000rpm steady condition, warm-up duration of engine is decreased by exhaust heat recovery system.
Keywords
EHRS; Warm-up; Exhaust heat; Waste hest;
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