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접시 스프링을 이용한 DMF의 동히스테리시스 증가에 관한 연구
박규진(GyuJin Park),홍순석(SoonSeok Hong),장재덕(JaeDuk Jang),주인식(InSik Joo) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
A variety of methods are used to absorb the vibration and impact generated by Power train system. In automatic transmission, damping spring, a core part of lock-up clutch system, makes the power train system stabilized by reducing the fluctuation torque of any engine system when a lock-up clutch is operated. As another method, a Dual Mass Flywheel(DMF) has been applied to reduce the vibration and noise such as gear rattle noise of transmission, booming noise in power train system. Generally, this part helps the improvement of total vehicle systems by spring characteristic change. In this paper the new method using a elastic washer is introduced to chage the dynamic hysteresis. To analysis the dynamic hysteresis of DMF, numerical simulation has been carried out using Damper Analysis Toolkit made by OPEN API module in DAFUL. Preliminary test has also been conducted to assess the dynamic behavior of damper springs. The results of analysis and test are discussed in view of the dynamic simulation of DMF. The maximum relative errors between numerical analysis and test was 12.1% and the minimum relative error was 6.3%. The relative error of energy was 3.6%.
DMF 와 차량 EMS 제어 인자와의 상관 관계에 대한 연구
김병윤(Byungyoon Kim),정태섭(Taeseop Jung),김영(Young Kim) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
A Dual Mass Flywheel (DMF) has been applied to reduce the vibration and noise such as gear rattle noise of transmission, booming noise in power train system. Generally, this part helps the improvement of total vehicle systems by spring characteristic change. But it causes the instability of the creep idle engine rpm to the vehicle if there is no optimization of the power train system. In this paper we researched that the first Korean DMF focused on only the gear rattle noise in HMC vehicle amplified the instability of the creep idle engine rpm. We analyzed the original effect of the DMF design parameters and optimized to the vehicle. We also improved the Engine Management System control parameters for the robustness of the endurance DMF and vehicle. This paper presents the results of the importance of the DMF design parameters and EMS control parameters to satisfy the creep idle engine rpm stability of the vehicle.