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一、前言1973年第一次石油冲击以来,二次原油提价,使急剧高涨的节能形势更为高涨。在这种情况下,由于新技术和已有技术的改进,在排放和噪声标准等社会要求方面,汽车发动机正在发生重大变化。特别是柴油机的经济性较好,载重汽车从重型到轻型均予采用。1.5～2.0吨的柴油汽车已占市场的95%,即使是轿车,也正在追随早已柴油化的欧洲,而有世界性的柴油化趋势。
I. Foreword Since the first oil shock in 1973, the price of secondary crude oil has pushed up the soaring energy saving situation. Under such circumstances, automobile engines are undergoing major changes in the social requirements such as emissions and noise standards due to improvements in new technologies and existing technologies. In particular, the economy of diesel engines is good, and trucks are used from heavy-duty to light-duty trucks. 1.5 ~ 2.0 tons of diesel vehicles have accounted for 95% of the market, even the cars are also following the already diesel diesel Europe has a global trend of diesel.