N-D, N-R TRANSMISSION CONTROL METHOD OF AUTOMATIC TRANSMISSION

摘要

PURPOSE: When a transmission is activated from a neutral(N) to a driving(D) or to a rear driving(R) in an automatic transmission automobile, a duty rate of a control signal to control hydraulic pressure by the transmission state is changed, thereby improving a shifting of the transmission. CONSTITUTION: A driving state sensing portion(11) senses a driving state of an automobile, and outputs corresponding signal. A transmission control portion(2) reads the electrical signal from the driving state sensing portion(11), and determines the driving state of the automobile. When there is a transmission shift from neutral end to driving end or to rear driving end, the transmission control portion(2) outputs a control signal to change duty rate for the transmission shift. A hydraulic pressure control device(3) produces an appropriate hydraulic pressure by the control signal from the transmission control portion(2).