Abstract :
The mechanical transmission of automobile is very efficient, reliable and structurally simple, but is easy to wear the parts prematurely because of its dynamic load. In the case of complex external conditions, the frequent operation of the clutch, shift lever and throttle, increasing the burden on the driver is not conducive to safe driving. In recent decades, automatic transmission has been an unprecedented development; electronic control automatic transmission has become the development direction of modern car transmission. But the electronic control automatic transmission structure complex production cost is high; its repair and troubleshooting put forward the harsh requirements of the maintenance personnel, maintenance technology. Understanding the degree also constitutes a certain degree of difficulty. The modern car electronic control automatic transmission development history, composition and function of the failure of the file are not up to speed to make a major study. The cause and diagnosis of the exclusion of the automatic control of automotive electronic control
and maintenance are of great significance.
Keyword :
electronic control automatic transmission upshift not speed detection maintenance failure causes