The study is aimed at constructing a control system by applying the 8098 microprocessoras the intellectual control unit.The researches and practice have been done as follows:Finshing the hardware design and on-line debugging of the microcontroler system;Implementingthe pulse-width modulating control of the clutch engaging position through the combinationof multi-aim overall optimization and fuzzy control

with the throttle opening control adapt-ing the changes of the target position(i

e

the driver's intentional throttle opening)andmaiching different clutch engaging control

and moreover

resolving the time distribution ofcontrolling the two devices sychronously with one CPU properly;Putting forward to applyingthe digital proportional-differential modulato of throttle opening to weaken theshifting jerksand oscillation

and realize smooth shifting;Designing the main control program satisfyingthe intricate operating process and variety of driving cases to fulfil automatic shifting according to “the vehicle dynamic 3-parameter shifting schedule”and deal with the possible casessuch as urgent braking

normal stopping etc.

promptly and correctly;Offering some detailjamproof methods corresponding to the adverse operating circumstances of vehicle.