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首页> 外文会议>American Society of Mechanical Engineers(ASME) Internal Combustion Engine Division Fall Technical Conference; 20050911-14; Ottawa(CA) >An Investigation of Lean-burn in a 2-Valve TJ376QE SI Engine
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An Investigation of Lean-burn in a 2-Valve TJ376QE SI Engine

机译：两气门TJ376QE SI发动机稀薄燃烧的研究

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摘要

The intake system of a 2-Valve TJ376QE gasoline engine was modified so that its intake swirl and tumble motions were considerably intensified. The stronger air motions are helpful to organize air and fuel mixture strength distribution. The previous port electronic fuel injection system was modified and the technique of TEFI (Twice Electronic Fuel Injection per cycle)is employed. Through regulations of the two injection timings and proportions, an adequate air and fuel mixture stratification—quasi-homogenous mixture was produced and the lean burn can be realized in a product 2-valve S.I. engine. The experimental results show that the scope of bsfc reduction can be >10% at quite wide load range by ether 1 injection or by 2 injections. Comparing to the conventional single injection, a leaner mixture can be used by TEFI and an even more reduced fuel consumption of 5% was reached by 2 injections. The optimized values of A/F ratio can be higher by 2-3 units of A/F than that of the single injection method. The TEFI can reduce NOx emission by 35-50% than that of single injection at engine load (bmep) range of 0.20-0.75(MPa).
机译：对2气门TJ376QE汽油发动机的进气系统进行了改进，以使其进气涡流和滚转运动大大增强。较强的空气运动有助于组织空气和燃料混合物的强度分布。对先前的端口电子燃油喷射系统进行了修改，并采用了TEFI（每个周期两次电子燃油喷射）技术。通过调节两个喷射正时和喷射比例，产生了足够的空气和燃料混合物分层，即准均质混合物，并且可以在产品2气门S.I.发动机中实现稀薄燃烧。实验结果表明，在相当宽的负载范围内，通过醚1次注入或2次注入，bsfc还原的范围可以> 10％。与传统的单次喷射相比，TEFI可以使用更稀薄的混合物，并且两次喷射可以将燃油消耗降低5％。与单次进样方法相比，空燃比的优化值可以提高2-3个单位的空燃比。与0.20-0.75（MPa）的发动机负载（bmep）范围内的单次喷射相比，TEFI可以减少35-50％的NOx排放。

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