The key of gearbox refers to the gearbox of the vehicle, which is divided into manual and automatic. The key of manual gearbox is composed of gear and shaft. According to different gear composition, the speed regulation and torque change are caused, and the driver must apply shift control. Automatic gearbox AT consists of hydraulic torque converter, planetary gear, hydraulic pitch control system software and hydraulic control system software. According to the method of hydraulic transmission and gear combination, speed regulation and torque change are realized. If the driver puts on the gear and releases the brake system, the car will slow down.
Buick Regal's 9-speed Hydra-Matic intelligent gearbox uses more than 60 general invention patents, including newly upgraded single-item clutch, hydraulic torque converter, start-stop hydraulic accumulator, external TCM module and its coaxial design scheme, which makes it have a very compact 6AT volume. Compact structure, efficient transmission system, uniform and effective transmission ratio distribution of nine forward gears, and the overall transmission ratio range is 7.6: 1. The setting of two overspeed gears should obviously reduce the speed ratio of diesel engine and improve the main performance of fuel consumption during fast cruising.
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