6속 자동변속기 밸브바디의 윤활오일유량 분배 특성 연구
A Study on the Lubrication Flow Distribution in a Six-speed Automatic Transmission Valve Body
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In general, a valve body of the automatic transmission(AT) is controlled by the clutch, the brake and lubricating oil flow in a hydraulic system and lubricant flow for each valve can be adjusted independently. To increase the lifetime of AT, the lubrication flow rate in a valve body for a 6 speed AT based parallel hybrid electric vehicle must be provided with proper oil distribution and control. In this study, we carried out several experiments without the inner parts of AT and with a AT assembly. The variation of the flow rate on oil temperature and pressure between an oil supply port and the outlets of the lubrication port was evaluated and analyzed. In the case of AT without the inner parts, it was evident that as the oil required for an operation of the clutch and brake was discharged from the outlet port, the flow rate from each lubrication port is decreased. However, the flow rate of the AT assembly was slightly increased. In addition, the lubrication flow rate was increased with increasing the oil temperature, and also it was reduced with increasing the oil pressure. Details of the resulting data are discussed.
Abstract
In general, a valve body of the automatic transmission(AT) is controlled by the clutch, the brake and lubricating oil flow in a hydraulic system and lubricant flow for each valve can be adjusted independently. To increase the lifetime of AT, the lubrication flow rate in a valve body for a 6 speed AT based parallel hybrid electric vehicle must be provided with proper oil distribution and control. In this study, we carried out several experiments without the inner parts of AT and with a AT assembly. The variation of the flow rate on oil temperature and pressure between an oil supply port and the outlets of the lubrication port was evaluated and analyzed. In the case of AT without the inner parts, it was evident that as the oil required for an operation of the clutch and brake was discharged from the outlet port, the flow rate from each lubrication port is decreased. However, the flow rate of the AT assembly was slightly increased. In addition, the lubrication flow rate was increased with increasing the oil temperature, and also it was reduced with increasing the oil pressure. Details of the resulting data are discussed.
참고문헌 (7)
- H. Tomomatsu, "Automatic Transmission Control System Developed for Toyota Mild Hybrid System(THS-M)", SAE 2006-01-1595, ~ (2006)
- 정헌술, "자동변속기 오일 소요유량 시험법개발 및 측정데이터 분석", 유공압건설기계학회지, 6(1), pp.10~16 (2009), 유공압건설기계학회
- S. M Chun, "Network analysis of an engine lubrication system", Tribology international, 36, pp.609~617 (2003)
- S. Manco, "Gerotor lubiricating oil pump for IC engines", SAE 982689, ~ (1998)
- Jeong-Eui Yun, "Oil Flow Distribution Control of Engine Lubrication System Using Orifice Component", KSTLE, 22(1), pp.47~52 (2006)
- Paul R. Meemik, "Lubricant Flwo to Connecting- Bearings Through a Roatating CrankShaft", SAE 860229, ~
- Jagadish Sorab, "Sufrace and Engine Oil Effects on Joumal Bearing Lubrication", SAE981408, ~