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非公路用车的不断改进和发展要求传动系统作相应的改进。底特律阿里逊公司1973年将为20～35短吨载重汽车及15～20立方码铲运机提供阿里逊 CLBT750全自动变速器。该变速器有五个前进档,其中2～5档为自动变速。设计中一方面发展了一个液压控制系统,使在发动机、车辆的各种速度、负荷工况下具有良好的换档性能,不管是由低档到高档还是由高档到低挡,都能保证换档的平顺,可靠。另一方面是发展了一个尺寸小、制动功率高、反应快的液力下坡减速器从而得到了车辆安全下坡的保证。下面叙述 CLBT750变速箱的设计和发展。
Continuous improvement and development of off-highway vehicles require a corresponding improvement of the transmission system. Allison, Detroit, will supply the Allison CLBT750 fully automatic transmission for 20-35 st-shorts and 15-20-yard scrapers in 1973. The transmission has five forward gears, of which 2 to 5 gears are automatic gearshift. Design on the one hand, the development of a hydraulic control system, so that the engine, the vehicle speed, load conditions have good shift performance, whether from low to high or from high to low gear, can ensure the shift Smooth, reliable. On the other hand, a hydraulic downhill reducer with small size, high braking power and quick response has been developed to ensure the safety of the vehicle downhill. The following describes the CLBT750 gearbox design and development.