한국자동차공학회논문집 (Transactions of the Korean Society of Automotive Engineers)

  • 제22권4호
  • /
  • Pages.89-97
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  • 2014
  • /
  • 1225-6382(pISSN)
  • /
  • 2234-0149(eISSN)
한국자동차공학회 (The Korean Society of Automotive Engineers)
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변속기 시뮬레이터를 이용한 진단 및 안전작동 알고리즘 분석

Analysis of Diagnosis and Failsafe Algorithm Using Transmission Simulator

  • 정규홍 (대진대학교 컴퓨터응용기계설계공학과)
  • Jung, Gyuhong (Department of Computer Aided Mechanical Design Engineering, Daejin University)
  • 투고 : 2013.08.13
  • 심사 : 2013.10.08
  • 발행 : 2014.05.01
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초록

As the digital control technologies in automotive industry have advanced, electronic control units(ECUs) play a key-role to improve system performance. Transmission control unit(TCU) is a shifting controller for automatic transmission of which major functions are to determine the shift and manage the shifting process considering the various sensor signal on transmission and driver's commands. As with any ECU in vehicle, TCU performs complex algorithms such as shift control, diagnostic and failsafe functions. However, firmware design analysis is hardly possible by the reverse engineering due to code protection. Transmission simulator is a hardware-in-the-loop simulator which enables TCU to work in normal mode by simulating the electrical signal of TCU interface. In this research, diagnosis and failsafe algorithm implemented on commercialized TCU is analyzed by using the transmission simulator that is developed for wheel loader construction vehicle. This paper gives various experimental results on the proportional solenoid current trajectories for different operating modes, error detection criterion and limphome mode gears for all the possible cases of clutch malfunction. The derived results for conventional TCU can be applied to the development of inherent TCU algorithms and the transmission simulator can also be utilized for the test of TCU to be developed.

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참고문헌

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