A Study on the Analysis of Hydraulic Circuit for First Pressure Control of Automatic Transmission KICK DOWN System

자동변속기 KICK DOWN 시스템의 1차 압력 제어를 위한 유압 회로 해석에 관한 연구

This paper refers to the results of a study on the usefulness of simulation techniques based on both modeling and experiments of KICK DOWN pressure control circuit using an duty solenoid valve controlled by pulse width modulation for an automatic transmission. In this study, dynamic characteristics of solenoid valve plunger and first pressure are verified. Besides, this paper shows the design data for improvement of feeling in changing of gear by means of simulation according to varying the size of jet orifice and temperature of automatic transmission fluid, which are the important variables of the first pressure.