Fig. 1 Transmission gear train stick diagram
Fig. 2 TCU with jumper connectors
Fig. 3 TCU I/O signals
Fig. 4 Transmission simulator
Fig. 5 Closed-loop control of TCU analog input
Fig. 6 Analog input in monitoring program
Fig. 7 Typical transient response for F2→F3
Fig. 8 PSV current and PWM duty sensing
Fig. 9 Voltage output in auto scan function
Fig. 10 Slip time 2-3 load upshift error(No. 170)
Fig. 11 Gear slip error(No. 168)
Fig. 12 F2→F3 shift at limp-home
Fig. 13 Shift map at normal and limp-home
Fig. 14 BF PSV open circuit error(No. 151)
Fig. 15 EU1 errors with auto scan function
Fig. 16 OP3 error with global enable switch
Table 1 Clutch and brake engagement
Table 2 CAN messages
References
- G. H. Jung and K. I. Lee, "A Research on Shifting Controller Development of a Automatic Transmission for Construction Vehicles", Transactions of KSAE, Vol.10, No.2, pp.234-242, 2002.
- G. H. Jung, C. D. Jung and S. H. Park, "Feedback Shift Controller Design of Automatic Transmission for Tractors", Journal of Drive and Control, Vol.13, No.1, pp.1-9, 2016. https://doi.org/10.7839/KSFC.2016.13.1.001
- On-board diagnostics, https://en.wikipedia.org/wiki/On-board_diagnostics
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- H. J. Song et al., "Verification of Algorithm for Real-Time Traversability Analysis of Autonomous Vehicle Using Virtual Simulator", 2017 17th International Conference on Control, Automation and Systems, pp.197-198, 2017.
- G. H. Jung et al., "A Development of TCU Analyzer for Wheel Loader Automatic Transmission", KSAE 2006 Autumn Conference, pp.1405-1410, 2006.
- G. H. Jung, S. H. Shin and S. I. Lee, "Development of an Automatic Transmission Simulator for a Wheel Loader," Transactions of KFPS, Vol.4, No.2, pp.7-20, 2007.
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- G. H. Jung, "Development of Transmission Simulator for High-Speed Tracked Vehicles", Journal of Drive and Control, Vol.14, No.4, pp.29-36, 2017. https://doi.org/10.7839/KSFC.2017.14.4.029
- SAE J1939, Surface Vehicle Recommended Practice, 2005.