Skip to main content
SpringerLink
Log in

Influence of a clutch control current profile to improve shift quality for a wheel loader automatic transmission

  • Published:
International Journal of Precision Engineering and Manufacturing Aims and scope Submit manuscript

Abstract

A loader is a construction machine to upload soil into trucks or to transport those materials. As a kind of loaders, a wheel-loader, which is driven by wheels, has been widely used. Since a wheel-loader with an automatic transmission operates in the adverse environments such as constructions sites, the shift quality has not been addressed as a main research topic. However, the necessary for researches to improve the shift quality of automatic transmission raised to develop control technology for operator’s convenience. In this study, a wheel-loader’s power train with an automatic transmission was analytically modeled and then the shift quality was analyzed based on power train modeling. An analytical model of wheel-loader’s power train is verified by comparing experimental and simulated results under the same operational conditions. Since the shift performance is affected by the pressure in clutch piston, current profile of a proportional pressure control valve to control the automatic transmission was varied for the simulation verification. In the simulations, it was analyzed in terms of shift performance in each stage of fast filling, take-over and clutch slippage, and clutch slippage time. Finally, relative amplitude of jerk is used in order to decide the regular shift performance.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

Abbreviations

α :

acceleration

ξ PCV :

damping ratio of the proportional control valve

ω :

angular velocity

ω PCV :

natural frequency of the proportional control valve

μ :

friction coefficient of friction plate

k p, k i :

PI controller gains

KX :

gain of the proportional control valve

IPCV :

input current of the PCV converted to a Laplace

Jeqin :

equivalent inertia of input shaft group

Jeqcon :

equivalent inertia of connection shaft group

Jeqout :

equivalent inertia of output shaft group

n:

number of friction plate

R:

effective radius of friction plate

F:

force acting on the clutch piston

TIN :

turbine torque

T:

transmitted torque

T*K1C-Max :

maximum locked torque of 1st clutch

T*K1C :

locked torque of a 1st clutch

TLOAD :

load torque

XPCV :

displacement of the PCV converted to a Laplace

u:

gear ratio

Z:

gear tooth

c1, c2, c3, c4, c5:

equivalent gear ratio of central gear train

i1, i2, i3:

equivalent gear ratio of input gear train

IN:

input shaft

KVC, KVS:

shaft with forward clutch and without clutch

KRC, KRS:

shaft with reverse clutch and without clutch

K1C, K1S:

shaft with 1st clutch(K1) and without clutch

K2C, K2S:

shaft with 2nd clutch(K2) and without clutch

K3C, K3S:

shaft with 3rd clutch(K3) and without clutch

K4C, K4S:

shaft with 4th clutch(K4) and without clutch

o1, o2, o3:

equivalent gear ratio of output gear train

OUT:

output shaft with gear

References

  1. Yun, U. K., “Analysis of the Wheel Loader Powertrain System Applied by Shift Control Algorithm,” M.Sc. Thesis, Hanyang University, 2008.

    Google Scholar 

  2. Park, S. H., Alam, K., Jeong, Y. M., Lee, C. D., and Yang, S. Y., “Modeling and Simulation of Hydraulic System for a Wheel Loader Using AMEsim,” Proc. of ICCAS-SICE, pp. 2991–2996, 2009.

    Google Scholar 

  3. Oh, J.-Y., “Shift Characteristics Analysis of Automatic Transmission for Wheel Loaders,” Ph.D. Thesis, Hanyang University, 2012.

    Google Scholar 

  4. Tinker, M. M., “Wheel Loader Powertrain Modeling for Real-Time Vehicle Dynamic Simulation,” M.Sc. Thesis, University of Iowa, 2006.

    Google Scholar 

  5. Hyundai Motor, “Design Theory of Automatic Transmission,” 1995.

    Google Scholar 

  6. Oh, J.-Y., Yun, U.-K., Park, Y.-J., Lee, G.-H., and Song, C.-S., “Characteristics Analysis of Automatic Transmission for the Wheel-Loader with Shift Control Algorithm,” Journal of the Korean Society of Manufacturing Technology Engineers, Vol. 20, No. 5, pp. 639–645, 2011.

    Google Scholar 

  7. Ompusunggu, A. P., Sas, P., and Van Brussel, H., “Modeling and Simulation of the Engagement Dynamics of a Wet Friction Clutch System Subjected to Degradation: An Application to Condition Monitoring and Prognostics,” Mechatronics, Vol. 23, No. 6, pp. 700–712, 2013.

    Article  Google Scholar 

  8. Watton, J., “Fluid Power Systems,” Prentice-Hall, 1989.

    Google Scholar 

  9. Merritt, H. E., “Hydraulic Control Systems,” John Wiley & Sons, 1991.

    Google Scholar 

  10. McCloy, D. and Martin, H. R., “Control of Fluid Power: Analysis and Design,” Elis Horwood, 1980.

    Google Scholar 

  11. Poley, R., “DSP Control of Electro-Hydraulic Servo Actuators,” Texas Instruments Application Report, Report No. SPRAA76, 2005.

    Google Scholar 

  12. Oh, J.-Y., Lee, G.-H., and Song, C.-S., “The Hydraulic System Modeling and Analysis of the Clutch Direct Control of an Automatic Transmission for a Forklift Truck,” J. Korean Soc. Precis. Eng., Vol. 26, No. 1, pp. 112–119, 2009.

    Google Scholar 

  13. Jung, G.-H. and Lee, G.-H., “A Development of Proportional Control Solenoid Valve Performance Tester for Automatic Transmission,” Journal of the Korea Fluid Power Systems Society, Vol. 3, No. 4, pp. 21–28, 2006.

    Google Scholar 

  14. Usuki, K., Fujita, K., and Hatta, K., “The Invecs-II Electronically Controlled Automatic Transaxles for FWD Passenger Cars,” SAE Technical Paper, No. 960429, 1996.

    Google Scholar 

  15. Jung, G.-H., Shin, S.-H., Lee, S.-I., and Kim, H.-J., “A Development of TCU Analyzer for Wheel Loader Automatic Transmission,” Proc. of the KSAE Spring Conference, pp. 1405–1410, 2006.

    Google Scholar 

  16. Yun, U.-K., Lee, G.-H., Lee, J.-H., Jung, G.-H., and Song, C.-S., “The Shift Control Algorithm Modeling and Analysis of Automatic Transmission for Wheel Loader,” Proc. of KSPE Spring Conference, pp. 131–132, 2007.

    Google Scholar 

  17. Lee, J.-C., Kim, K.-S., Yim, J.-H., Lee, H.-W., Kwon, Y.-M., et al., “A Study on the Quantitative Assessment Method for Shift Quality of Automatic Transmission in a Wheel Loader,” Transactions of the Korean Society of Mechanical Engineers A, Vol. 32, No. 7, pp. 561–568, 2008.

    Article  Google Scholar 

  18. Oh, J.-Y., Park, Y.-J., Lee, G.-H., and Song, C.-S., “Modeling and Validation of a Hydraulic Systems for an AMT,” Int. J. Precis. Eng. Manuf., Vol. 13, No. 5, pp. 701–707, 2012.

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Construction Equipment R&D Group, Korea Institute of Industrial Technology, 320, Techno Sunhwan-ro, Yuga-myeon, Dalseong-gun, Daegu, 42994, South Korea

    Joo-young Oh

  2. Technology Convergence R&D Group, Korea Institute of Industrial Technology, 320, Techno Sunhwan-ro, Yuga-myeon, Dalseong-gun, Daegu, 42994, South Korea

    Jin-young Park & Jung-woo Cho

  3. Convergence Components & Agricultural Machinery Application Group, Korea Institute of Industrial Technology, 119, Jipyeongseonsandan 3-gil, Baeksan-myeon, Gimje-si, Jeollabuk-do, 54325, South Korea

    Jeong-gil Kim

  4. School of Mechanical Engineering, Chungnam National University, 99 Daehak-ro, YuSeong-gu, Daejeon, 34134, South Korea

    Jae-hoon Kim

  5. System Engineering Research Division, Korea Institute of Machinery and Materials, 156, Gajeongbuk-ro, Yuseong-gu, Daejeon, 34103, South Korea

    Geun-ho Lee

Authors
  1. Joo-young Oh
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Jin-young Park
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Jung-woo Cho
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Jeong-gil Kim
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. Jae-hoon Kim
    View author publications

    You can also search for this author in PubMed Google Scholar

  6. Geun-ho Lee
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Joo-young Oh.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Oh, Jy., Park, Jy., Cho, Jw. et al. Influence of a clutch control current profile to improve shift quality for a wheel loader automatic transmission. Int. J. Precis. Eng. Manuf. 18, 211–219 (2017). https://doi.org/10.1007/s12541-017-0027-2

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s12541-017-0027-2

Keywords

Search

Navigation