Affiliation:
1. Doshisha University
2. Yanmar Holdings Co., Ltd.
Abstract
<div class="section abstract"><div class="htmlview paragraph">The purpose of this study is to reduce cooling loss in gas engines using hydrogen. In this report, the effect of different hydrogen-CNG supply methods on combustion and exhaust characteristics of SI engine were investigated. As a result, the 13A-port-injection caused sharp heat release at hydrogen addition ratio (<i>RH</i>) of 20 %, with a maximum brake thermal efficiency of 27.5 %. Also, the hydrogen-port-injection promotes combustion above <i>RH</i>=40 % and reduces cooling loss, resulting in a maximum brake thermal efficiency of 31.0 % at <i>RH</i>=80 %, 1.8 pt higher than that of the 13A-port-injection.</div></div>
Publisher
Society of Automotive Engineers of Japan
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