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직접 제어 방식을 이용한 지게차용 자동변속기의 클러치 유압시스템 모델링 및 해석
오주영(Jooyoung Oh),이근호(GeunHo Lee),김도식(DooSik Kim),이준혁(JunHyuk Lee),황광진(Kwangjin Hwang),이상호(SangHo Lee) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Automatic transmission is consisted of geartrain, valve body, proportional control valve, electronic control unit and friction element that is consisted of clutch, brake, etc. Hydraulic control system effects directly shift quality which is important criterion estimated performance of automatic transmission. In this study, there is a purpose to enhance shift quality for forklift truck automatic transmission. The clutch hydraulic system using direct type control is modeled and analyzed. In this clutch hydraulic systeme, single cartridge type proportional valves are applied. Reduced torque method is suggested by duty ratio using PWM signal in clutch engagement pressure.