• 제목/요약/키워드: Clutch Pressure Plate

검색결과 13건 처리시간 0.021초

클러치 압력판의 형상에 따른 내구성 연구 (Durability Study due to Shape of Clutch Pressure Plate)

  • 한문식;조재웅
    • 한국기계가공학회지
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    • 제18권7호
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    • pp.36-41
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    • 2019
  • The design of pressure plate for automotive clutch also has been improved. The tension of the clutch spring compresses the clutch plate onto the flywheel to deliver the power. In this study, three types of pressure plate for clutch were modelled by using CATIA program, and the structural analyses due to external forces were performed with ANSYS program. It is thought that this study result can be used to verify the stability and strength according to the shape of the pressure plate.

승용차 클러치 시스템의 트라이볼로지 특성에 관련한 고장사례 연구 (Failure Study for Tribological Characteristic Analysis of a Clutch System in Passenger Cars)

  • 김청균;이일권
    • Tribology and Lubricants
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    • 제22권4호
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    • pp.196-202
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    • 2006
  • This paper presents a case study on the tribological failure analysis of a clutch system for a manual transmission car. The clutch systems are composed of clutch disk, clutch pressure plate, flywheel rubbing surface, coil and diaphragm springs, release bearing and lever, clutch spline and shaft. The purpose of a clutch system is to transmit and disconnect the driving power of engines by frictional farce from a rubbing surface of a flywheel to a clutch disk and clutch pressure plate with a minimum power loss. In this study, many tribological failure cases based on the wear phenomena and thermal distortions have been presented, which are collected from the car repair shop and maintenance center. The triboiogicai failures are mostly come from the driving conditions, overloading of a car, and especially driving style and personal habit of a car driver.

기계적 및 열적 물성을 고려한 클러치 압력판의 거동해석 (Analysis of Pressure Plate Behavior of a Clutch Including Thermal and Mechanical Material Properties)

  • 허만대;이상욱;김국용;강성수
    • Journal of Advanced Marine Engineering and Technology
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    • 제33권4호
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    • pp.524-532
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    • 2009
  • In the mechanical clutches, the pressure plate is one of the important parts for transferring the power and reducing the vibration. Instead of gray and ductile irons, CGI(Compacted Graphite Cast Iron) is concerned to be the replacement recently. A thermo-mechanical coupled analysis was performed to investigate the behavior of the pressure plate for manual clutches. Thermal and mechanical properties of three kinds of cast irons were obtained from the mechanical experiments and referred other technical reports. The results of FEM analysis, were well match with the experimental ones. In this designated FEM method, temperature distribution, stress distribution and thermal deformation were successfully gained and these results will help to design the pressure plate which was made by cast irons including CGI.

자동차 수동 변속기 클러치 시스템의 답력 이력 특성 예측 모델 (Automotive Manual Transmission Clutch System Modeling for Foot Effort Hysteresis Characteristics Prediction)

  • 이병수
    • 한국자동차공학회논문집
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    • 제16권5호
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    • pp.164-170
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    • 2008
  • A typical clutch system for automotive manual transmissions transfers hydraulic pressure generated by driver's pedal manipulation to the clutch diaphragm spring. The foot effort history during the period of push is different than the period of the clutch pedal's return. The effort or load difference is called clutch foot effort hysteresis. It is known that the hysteresis is caused by friction. The frictional force and moment are produced between various component contact points such as between the rubber seal and the inner wall inside the hydraulic cylinder and between the diaphragm spring and the pressure plate, etc. Understanding the clutch pedal foot effort hysteresis is essential for a clutch release system design and analysis. The dynamic model for a clutch release system is developed for the foot effort hysteresis prediction and a simulation analysis is performed to propose a tool for analysing a clutch system.

동력절환용 클러치의 기계식 잠금장치 체결 알고리즘에 대한 연구 (Study of Locking Algorithms for a On/Off Multi-plate Clutch)

  • 김수철;김재승;문상곤;이근호
    • 드라이브 ㆍ 컨트롤
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    • 제21권1호
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    • pp.1-7
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    • 2024
  • The locking performance of a multi-plate clutch with a mechanical lock-up system is governed by the engagement algorithm. In this paper, a control algorithm to improve the locking performance of the clutch was studied. A 1D dynamic model was constructed and simulated according to the developed algorithm. The developed algorithm was composed of a method in which the locking device is engaged while generating artificial slip on the friction plate by controlling the piston pressure of the clutch. Furthermore, a case study of the parameters within the developed algorithm was conducted to explore combinations that maximize locking performance and analyze trends according to these parameters.

Modeling the clutch energy and clutch life of a heavy duty vehicle

  • Akkurt, Ismail;Anlas, Gunay;Bedir, Hasan
    • Advances in Automotive Engineering
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    • 제1권1호
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    • pp.21-39
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    • 2018
  • Clutch energy is the thermal energy dissipated on the clutch disc, and it reaches its highest level during drive-off as a result of the difference between the angular speeds of the flywheel and clutch disc, and the torque transmitted. The thermal energy dissipated effects the clutch life. This study presents a new drive-off and thermal model to calculate the clutch energy for a rear wheel driven heavy-duty vehicle and to analyze the effects of clutch energy on temperatures of clutch pressure plate, flywheel and clutch housing. Three different driver profiles are used, based on the release of the clutch pedal in modulation zone: i) the pedal travels with the same speed all the way, ii) the travel speed of the pedal increases, iii) the travel speed of the pedal decreases. Vehicle test is performed to check the accuracy of the model. When compared to a simpler model that is widely used in the literature to calculate the clutch energy, the model used in this study calculates the clutch energy and angular speed behaviors of flywheel and transmission input shaft in better agreement with experimental results. Clutch wear and total clutch life are also estimated using the mean specific friction power.

자동차 클러치 디스크의 불규칙 진동에 의한 디스크 파손 연구 (Study on the Fracture of Automotive Clutch Disk due to Abnormal Vibration)

  • 조종두;이흥식
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2006년도 추계학술대회논문집
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    • pp.556-561
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    • 2006
  • In this study, the failure of the automotive clutch disk was investigated. During the process of power transmission, clutch disk plates did repeated work of releasing and engaging the pressure plate. The effects of unbalance rotation in the abnormal vibration and torque amplitude under engaged state were measured from this experiment. In order to reduce the unbalance, a modified clutch disk shape was developed. With a three-dimensional model of the stopper pin, to predict fatigue fracture, finite element analysis was carried out and evaluated the improvement of the new clutch disk.

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습식 DCT의 드래그 토크 저감을 위한 클러치 패드 유로 설계 (A Study on the Wet Clutch Pattern Design for the Drag Torque Reduction in Wet DCT System)

  • 조정희;한준열;김우정;장시열
    • Tribology and Lubricants
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    • 제33권2호
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    • pp.71-78
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    • 2017
  • The drag torque in the wet clutch system of a dual clutch transmission system is investigated because it is relatively high, up to 10 of the total output torque of the engine, even when the clutch is in the disengagement state with zero torque transfer. Drag torque results from the shear resistance of the DCTF between the friction pad and separator plate. To reduce the drag torque for ensuring fuel economy, the groove pattern of the wet clutch friction pad is designed to have a high flow rate through the pattern groove. In this study, four types of groove patterns on the friction pad are designed. The volume fraction of the DCTF (VOF) and hydrodynamic pressure developments in the gap between the friction pad and separator plate are computed to correlate with the computation of the drag torque. From the computational results, it is found that a high VOF and hydrodynamics increase the drag torque resulting from the shear resistance of the DCTF. Therefore, a patterned groove design should be used for increasing the flow rate to have more air parts in the gap to reduce the drag torque. In this study, ANSYS FLUENT is used to solve the flow analysis.

자동변속기 마찰요소의 동특성 해석 (Analysis of Dynamics Characteristics for Friction Elements in Automatic Transmission)

  • 최영종;정우진;김성원
    • 한국자동차공학회논문집
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    • 제5권5호
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    • pp.9-19
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    • 1997
  • In this paper, the modeling and analysis of dynamic characteristics has been carried out for friction clutches and brakes in an automatic transmission. From the operating oil pressure generated by the valve-body, time delay by check valve and the movement of piston has been examined. Also torque capacity and torque transferred at the clutch is studied. Heat capacity and temperature distribution at the reaction plate of clutch are codeled by time-dependent, nonhomogeneous partial differential equation, and brake torque, brake time, and the amount of heat generated are investigated. It is found that the time delay at the check valve is very short but dominant at the spool.

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NUMERICAL ANALYSIS PROCEDURE FOR PREDICTING TEMPERATURE FIELD IN DESIGN OF AUTOMOTIVE FRICTION CLUTCH

  • LEE B.;CHO C.
    • International Journal of Automotive Technology
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    • 제7권1호
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    • pp.61-68
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    • 2006
  • In design of the friction clutches of automobiles, knowledge on the thermo-elasticity a priori is very informative in the initial design stage. Especially, the precise prediction technique of maximum temperature and stress should be requested in design of mechanical clutches for their durability and compactness. In this study, an efficient and reliable analysis technique for the design of the mechanical clutches by using computer modeling and numerical method was developed. A commercial software STAR-$CD^{TM}$ was used to find the convective heat-transfer coefficients. MSC/$NASTRAN^{TM}$ software was followed to predict the temperature of clutch with utilization of estimated coefficients. Some experiments were also performed with a dynamometer to verify the procedure and calibrate the thermal load. As a conclusion, a design procedure, including numerical steps and experimental techniques for calibration, was proposed.