高原地区随海拔升高,大气压力下降,空气密度、含氧量降低。其特殊的环境条件极大地影响了我军运输车辆的使用性能。就目前装备的北方奔驰柴油载重运输车来说,虽然对柴油机采用了增压技术,功率下降相对较小,但经济性、动力性和排放还远远达不到原有的设计水平。 供油提前角的合理选择是改善柴油机性能的常用措施之一。供 Plateau region with altitude, atmospheric pressure decreased, air density, oxygen content decreased. Its special environmental conditions have greatly affected the serviceability of our military transport vehicles. For the current North Benz diesel truck loaded with diesel engines, although the supercharger technology is adopted for diesel engines, the power drop is relatively small, but the economy, power and emissions are far from the original design level. Reasonable choice of fuel supply advance angle is one of the common measures to improve the performance of diesel engine. for