我国载货汽车应推广应用多挡变速器

重型载货汽车采用多挡变速器可提高汽车的平均行驶车速、发动机的功率利用率和汽车的燃料经济性。多挡变速器可分为两箱式结构和三箱式结构，两箱式由主变速器前部分加分速器构成，三箱复合式由主箱、前面的分速式副箱及后面的分段式副箱构成。我国应首先发展二箱型带后置分段式副箱的8挡或9挡变速器，同时为以后发展前置分速式副箱而成为三箱式留有余地。

The Multi-Gearshifting Transmission Should Be Used and Popularized in China Trucks

The heavy duty trucks with their multi - gearshifting transmissions can increase their average running speed, power usage and fuel economy. The multi - gearshifting transmissions can be arranged under categories of a two - box type structure and a three - box type structure. The two - box type transmission consists of the main transmission in front plus the splitter, and the three - box type compound transmission consists of the main transmission, the splitter type auxiliary transmission in front and the range change gear type auxiliary transmission in back. The two - box type 8 or 9 gearshiftings transmission with a rear -mounted range change gear type auxiliary transmission should be first developed in China, this can provide a further development for a three - box type transmission with a front - mounted splitter type auxiliary transmission in the future.