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一、前言解放汽车发动机送厂大修到目前尚没有科学完善的鉴定方法。据有关资料介绍,国外是以现代检测器具对发动机动力性、经济性、排放烟尘浓度及噪声等进行检测、分析,凡在上述方面达到合格标准的送厂修理。我国交通部早在1963年下发的《汽车运输企业技术管理制度》一书中规定:凡送厂大修的发动机必须符合下列条件(摘要):①在燃料系、点火系及底盘调整正常的情况下,动力性下降比正常情况下挂低一个排挡;②汽缸压力下降,各汽缸压力达不到该车原厂规定压力的60％;③汽缸内经磨损过甚,元柱度大于0.35～0.55毫米,
First, the preface Liberation car engine overhaul to the factory there is no scientific method of identification. According to the relevant information, foreign countries use modern testing equipment to test and analyze the engine motility, economy, emission of smoke and dust concentration and noise, and send the repair to the factory where the above standards are met. As early as 1963, China’s Ministry of Communications issued the “Technical Management System for Motor Transport Enterprises”, which stipulates that all engines that deliver overhaul must meet the following conditions (Summary): ① In the case of normal adjustment of fuel system, ignition system and chassis Under normal circumstances, the lower the power of a lower hanging gear; ② cylinder pressure drops, the cylinder pressure does not reach the original car 60% of the pressure specified by the original; ③ cylinder wear too much, yuan column greater than 0.35 ~ 0.55 mm,