对市场反馈的发动机隔夜启动难故障问题进行分析,首先列出引起发动机难启动的常见原因,然后对常见原因进行分析排除,最终发现问题的焦点集中在发动机低压管路进气上。经试验分析,通过更改油泵回油单向阀结构的方式解决了该问题。本方案实施效果良好,提高了产品质量和市场竞争力。 Analyze the difficult problem of overnight start-up of the engine fed back to the market, firstly, list the common causes that cause difficult start-up of the engine, then analyze and eliminate the common causes, finally find the focus of the problem on the intake of the low-pressure line of the engine. The test analysis, by changing the way the oil pump return check valve structure to solve this problem. The implementation of the program is good, improving product quality and market competitiveness.