Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지
DOI QR코드

DOI QR Code

Modeling of the Powertrain System and the Vehicle Body for the Analysis of the Driving Comfortability

승차감 해석을 위한 동력전달계와 차량계의 모델링

  • Published : 2000.04.01
Download PDF
⟨ Previous Next ⟩

Abstract

Actual and strict definition of the shift quality for the powertrain system equipped an automatic transmission must be understood through the acceleration change of the vehicle body, which the driver directly feels as a shift shock. For this reason, it is necessary to concurrently analyze the characteristics of the powertrain system and the vehicle body. This paper presents the mathematical model of the vehicle body, which is based on the equivalent lumped system, to append to the developed model of the powertrain system. The concept of tire slip is also introduced for the experimental relationship between tire/road and driving force. Using the developed dynamic simulation programs, shift transients characteristics are analyzed. Theoretical results are compared with experimental ones from real car tests in equal conditions in order to prove the validity of presented model. In these tests, the system to measure the vehicle acceleration is used with various speeds and engine throttle sensors. It is expected that the presented modeling techniques can provide good predictions of the vehicle driving comfortability.

Keywords

References

  1. 'Design Practices - Passenger Car Automatic Transmission,' 1973., Advances in Engineering Series, AE-No.5, 2nd Edition, SAE
  2. Minowa T., 'Smooth Gear Shift Control System of Automatic Transmission Using Estimated Output Shaft Torque,' 1994., Journal of JSME, Part C, Vol. 61, No. 591, pp. 212-216
  3. Usuki K. , Fujita K. and Hatta K., 1996, 'The INVECS-II Electronically Controlled Automatic Transaxles for FWD Passenger Cars,' SAE Technical Paper No. 960429
  4. Cho D. and Hedrick J. K., 'Automotive Powertrain Modeling for Control,' 1989, Transactions of the ASME, Vol. 111, December, pp. 568-576
  5. Wong Y. J. 1979, Theory of Ground Vehicles, John Wiley & Sons, NY
  6. Petersen M. R. and Starkey J. M., 'Nonlinear Vehicle Performance Simulation with Test Correlation and Sensitivity Analysis,' 1996, SAE Technical Paper No. 960521
  7. Moskwa J. J., 'The Development of Vehicular Powertrain System Modeling Methodologies : Philosophy and Implementation,' 1997, SAE Technical Paper No. 971089
  8. Velinsky S. A. and Freeman J. S. , 1995, 'Design of Vehicle Power Transmission Systems,' Journal of Mechanical Design & Journal of Vibration and Acoustics, Special Combined Issue, Transactions of ASME, Vol 117(B), pp.1l3-120
  9. 임원식, 박영일, 이장무, 1997, '변속 시스템의 자유도 자율 판단 알고리즘,' 한국자동차공학회 논문집, 제5권, 제6호, pp. 202-214
  10. 임원식, 조한상, 장욱진, 박영일, 이장무, 1999, '서브 시스템 조합 개념을 이용한 동력전달계 동적 특성 해석용 범용 프로그램 개발,' 대한기계학회논문집, 제23권, 제12호, pp. 2287-2302
  11. 조한상, 임원식, 박영일, 이장무, 장욱진, 박진호, 1999, '승용차용 자동변속기의 변속 특성 향상에 관한 연구,' 한국자동차공학회 논문집, 제7권, 제6호, pp. 91-105
  12. 조한상, 임원식, 박영일, 이장무, 1998, '특성방정식을 이용한 회전기계 동력전달계의 유효강성 결정법,' 대한기계학회논문집 A권, 제22권, 제12호, pp. 2231-2238
  13. 임원식, 박영일, 이장무, 1995, '토크 컨버터의 모델링을 중심으로 한 자동변속기의 변속 과도 특성 해석,' 대한기계학회논문집, 제19권, 제1호, pp. 132-141
  14. Ishihara T. 1979, 'A Fundamental Consideration on Shift Mechanism of Automatic Transmission,' SAE Technical Paper No. 790043
  15. Vahabzadeh H. and Linzell S. M. 1991, 'Modeling, Simulation and Control Implementation for a Split-Torque, Geared Neutral, Infinitely Variable Transmission,' SAE Technical Paper No. 910409
  16. Morimura H. 1986, 'Effects on Engine Output Torque and Driveline Nonlinear characteristics on Vehicle Driveability,' SAE Technical Paper No. 865122