Proposing a transmission control unit in automatic gearbox

Abstract

Automatic gearboxes have been being used extensively in automobiles,
in which planetary gearboxes with fixed gear ratios are widely used.
The procedure of automatic transmission control is a complicated
process that requires a control algorithm that is suitable for operating
modes. The article proposes a control algorithm for gear shifting based
on the degree of wide open throttle and the long-run velocity of the
automobile, as well as a model of digital shifting controller by using
Matlab – Stateflow software. An automobile model simulation was
exected on a four-speed automatic gearbox to evaluate the control
algorithm and the model of digital shift controller.