The main aim of electronically controlled automatic transmission (ECAT) is to
improve conventional automatic transmission in the following ways.
• Gear changes should be smoother and quieter.
• Improved performance.
• Reduced fuel consumption.
• Reduction of characteristic changes over system life.
• Increased reliability.
The actual operation of an automatic gearbox is beyond the scope of this book.
However, the important points to remember are that gear changes and lock-up
of the torque converter are controlled by hydraulic pressure. In an ECAT
system, electrically ...
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