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(一) 发动机方面 重型货车已大部使用热效率较高的直接喷射式柴油机,为进一步节省能源,在发动机方面采取了下列措施,即增压中冷,低转速大扭矩,和可能在80年代实现的绝热燃烧室等。 1.增压中冷:重型货车采用增压中冷柴油机的日益增加,部分原因是为了符合美国对柴油机汽车排气污染中NOx含量的规定,中冷后进气温度降低,也就降低了燃烧温度,减少了
(A) For engines, heavy-duty trucks have mostly used direct-injection diesel engines with high thermal efficiency. In order to further save energy, the following measures have been taken in the area of engines: supercharged intercooler and low-speed high-torque engines and may be implemented in the 1980s Adiabatic combustion chamber and so on. 1. Turbocharged and intercooled: The increasing use of supercharged intercooled diesels for heavy goods vehicles is partly due to the fact that in order to comply with the United States’ requirement for NOx content in diesel engine exhaust pollution, the intake air temperature after intercooling is reduced, which reduces the combustion Temperature, reduced