摘要
本文介绍新开发１．３Ｌ４缸顶置气门式二冲程发动机，并从功率、燃油消耗率和排放等方面阐明了二冲程发动机的潜力。燃油直接被喷射到气缸内，然后靠扫气泵对已燃气体进行扫气。我们注意到混合气浓度下降对燃烧的影响。浓度比的最佳化与适度的换气有密切关系，因为高浓度比会引起自发点火和过度的换气损失。
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