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柴油机自1897年试验成功以来,由于具有效率高,燃料经济等优点,故以柴油机作为动力的机械得到日益广泛使用,尤其柴油机产生的一氧化碳(0.2%)远比汽油机(6%)低得多,故以柴油机为动力的施工机械和重型运输车辆在开挖隧道和地下施工中应用更广。世界各地柴油机的生产目前正迅速增加,以汽车为例,美国估计1985型汽车会有25%使用柴油
Diesel engines have enjoyed increasing popularity since they were successfully tested in 1897 due to their high efficiency and fuel economy. Especially, diesel engines produce much lower levels of carbon monoxide (0.2%) than gasoline engines (6%), Therefore, diesel-powered construction machinery and heavy-duty transport vehicles are more widely used in tunnel excavation and underground construction. The production of diesel engines around the world is rapidly increasing. Taking the automobile as an example, the United States estimates that 25% of 1985 vehicles will use diesel