我厂最近连续进来两台天津大发微型车维修,用户反映烧机油,冒黑烟。经析检发现是缸壁间隙磨损过大,需镗缸换活塞、活塞环,按修理规范完成作业,在发动机台上运转良好,故障排除。但将发动机装到车上路试,仍冒黑烟,逐一检查各系统都正常, I plant recently came in two consecutive Tianjin Daihatsu mini-car repair, users reflect burning oil, black smoke. Determined by the analysis found that the cylinder wall wear is too large, to be boring cylinder for piston, piston ring, according to repair specifications to complete the job, run well on the engine table, troubleshooting. However, the engine mounted on the road test vehicle, still black smoke, one by one to check the normal system,