[동력전달계부문] 휠로더 자동변속기의 TCU 개발 연구

In this research, The basic functions of wheel loader automatic transmission TCU including micro-controller system, proportional solenoid valve driver, duty cycle identification system, speed sensor signal conditioning system and data monitoring system, etc were implemented and open-loop shifting control scheme which is based on the experimental data of conventional TCU was designed in order to verify the feasibility of the developing TCU's shifting performance. The experimental result shows comparable shifting characteristics to that of conventional TCU though the test was performed at restricted shifting condition. Hence, we could have confidence for the development of wheel loader automatic transmission TCU. The following plan of this research is to design the control algorithm which improves the shifting quality and verify its performance from the shifting experiment