摘要
针对天然气内燃机充气系数下降这一问题，本文提出了缸内直接喷气的基本思想，并对气体喷射器流量特性和点燃式发动机进气门处喷气进行了试验研究，为缸内直接喷气的深入研究奠定了基础。
To solve the problem of volumetric efficiency decrease, the authors present natural gas in cylinder direct injection concept. The flow characteristics of gas injector are tested, and compressed natural gas(CNG) port injection SI engine is investigated.
基金
国家自然科学基金
