Electronically controlled automatic transmission system Introduction
In general, the required vehicle driving wheel speed and torque, and engine speed and torque can provide are quite different, and therefore need to change the transmission from the engine to the transmission ratio between the driving wheels, the engine dynamic economic and easily spread to driving wheel to be able to adapt to changes in load and road conditions needs.
In addition, parking, reversing, also be achieved through transmission. Timely coordination of engine and transmission working condition, full play the potential of power transmission system, to achieve the best match, which is the fundamental task of variable speed control system.
Automatic transmission to internal and external to the power transmission system status, as well as driving conditions demand, automatically select the appropriate transmission ratio gearbox with such features as automatic transmission, sub-grade and no grade changes with transmission ratio two categories. In the automatic transmission during a stage variable speed control of transmission ratio gearbox, also known as the shift control; and continuous stepless drive ratio can change the gearbox, known as the continuously variable transmission (referred to as CVT) o Continuously Variable Transmission has the ideal The constant power transmission performance, speed the process of continuous smooth, no power interruption is that people have been striving for goals, use of electronic technology microelectronics Kongzhi speed systems have become the current vehicle automatic transmission function main method.
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