“九五”大型农机、工程机械配套用内燃机及关键附配件的发展重点目前。全国内燃机年产量已超过２亿马力。由于大中马力拖拉机、联合收割机和工程机械工作环境条件恶劣，工作负荷重，因此内燃机的可靠性难于达到要求。其中平均无故障间隔（ＭＴＢＦ）一般为３００～５００... “Ninth Five-Year” large-scale farm machinery, construction machinery supporting internal combustion engine and key accessories development focus at present. The annual output of internal combustion engine has more than 200 million horsepower. Due to the large, medium-sized horsepower tractors, combine harvesters and construction machinery work in harsh conditions, heavy workload, so the reliability of internal combustion engines is difficult to meet the requirements. The average time between failures (MTBF) is generally 300 ~ 500 ...