DOI QR코드

DOI QR Code

Analysis of Drawbar Load Acting on Tractor Engine at Maximum Drawbar Power

최대 견인 출력시 트랙터 엔진의 견인 부하 분석

  • Kim, S.C. (KSAM, Dept. of Biosysems and Biomaterials Science and Engineering, and Institute for Agricultural and Life Sciences, Seoul National University) ;
  • Kim, K.U. (KSAM, Dept. of Biosysems and Biomaterials Science and Engineering, and Institute for Agricultural and Life Sciences, Seoul National University) ;
  • Kim, D.C. (Technical Center Tongyang Moolsan Co.)
  • Published : 2009.04.25

Abstract

This study was conducted to investigate the load acting on a tractor engine when it delivers the maximum power at drawbar. The results of the drawbar tests on the 5 locally-made and 14 imported tractors conducted at NIAE in 2004, and the 15 tractors tested at OECD test stations in foreign countries were analyzed and presented by the torque load ratio, defined as a ratio of the engine torque load caused by drawbar pull to its full-load capacity, as a function of pull speed. The NIAE test results showed that the torque load ratio increased from 20 to 80% with pull speed less than 5 km/h. At speeds faster than 5 km/h, it was 80${\sim}$110% regardless of the pull speed. However, the OECD test results showed that the torque load ratio was evaluated mostly to be 70${\sim}$90% in the entire pull speed range. The same trend was also shown for the maximum drawbar load. The difference in the torque load ratio may be attributable to bias-ply tires for locally-made and some imported tractors. It is also suggested that the input torque load may be increased safely up to 120% of the full load capacity of the tractor engine for an accelerated life test of tractor transmissions.

References

  1. CEMAGREF. 2006a. OECD Performance Test of an Agricultural Tractor No. 15270. Groupement d'Antony Pare de tourvoie, BP 44, 92163 Antony cedex, France
  2. CEMAGREF. 2006b. OECD Performance Test of an Agricultural Tractor No. 15291. Groupement d'Antony Pare de tourvoie, BP 44, 92163, Antony cedex, France
  3. CFMITI. 2007. Report on Test in Accordance with OECD STANDARD CODE 2 for the Official Testing of Agricultural and Forestry Tractors No. T-589/1090/14/0ECD, Central Farm Machinery Training & Test Institute, Budni-466, 455 MP, India
  4. COTTEC. 2005a. Report on Test in Accordance with the OECD Standard Code for the Official Testing of Agricultural Tractor Performance No. 200507. China Official Tractor Test and Evaluation Center, Luoyang, Henan, China
  5. COTTEC. 2005b. Report on Test in Accordance with the OECD Standard Code for the Official Testing of Agricultural Tractor Performance No. 200508. China Official Tractor Test and Evaluation Center, Luoyang, Henan, China
  6. COTTEC. 2005c. Report on Test in Accordance with the OECD Standard Code for the Official Testing of Agricultural Tractor Performance No. 200505. China Official Tractor Test and Evaluation Center, Luoyang, Henan, China
  7. COTTEC. 2005d. Report on Test in Accordance with the OECD Standard Code for the Official Testing of Agricultural Tractor Performance No. 200506. China Official Tractor Test and Evaluation Center, Luoyang, Henan, China
  8. COTTEC. 2007. Report on Test in Accordance with the OECD Standard Code for the Official Testing of Agricultural Tractor Performance No. 200701, China Official Tractor Test and Evaluation Center, Luoyang, Henan, China
  9. COTTEC. 2008. Report on Test in Accordance with the OECD Standard Code for the Official Testing of Agricultural Tractor Performance No. 200704. China Official Tractor Test and Evaluation Center, Luoyang, Henan, China
  10. DLG-Testing Station for Agricultural Machinery. 2005a. Report on Test in Accordance with the OECD Standard Code for the Official Testing of Agricultural Tractor Performance No. 2004-006. DLG Testing Station for Agricultural Machinery. Max-Eyth-Weg 1 D-64823 Gross-Umstadt, Germany
  11. DLG-Testing Station for Agricultural Machinery. 2005b. Report on Test in Accordance with the OECD Standard Code for the Official Testing of Agricultural Tractor Performance No. 2004-007. DLG Testing Station for Agricultural Machinery. Max-Eyth-Weg 1 D-64823 Gross-Umstadt, Germany
  12. DLG-Testing Station for Agricultural Machinery. 2005c. Report on Test in Accordance with the OECD Standard Code for the Official Testing of Agricultural Tractor Performance No. 2004-008. DLG Testing Station for Agricultural Machinery. Max-Eyth-Weg 1 D-64823 Gross-Umstadt, Germany
  13. ISO. 1990. Standard 789-9: Agricultural Tractor -Test Procedures-Part 9: Power Test for Drawbar. International Organization for Standard, Geneva, Switzerland
  14. Kim, K. U., L. S. Bashford and B. T. Sampson. 2005. Improvement of tractor performance. Applied Engineering in Agriculture 21(6): 949-954 https://doi.org/10.13031/2013.20024
  15. NIAE. 2004. Agricultural Machinery Test Report 04-M-1-4~04-M-1-59. National Institute of Agricultural Engineering, Suwon, Korea
  16. NIAE. 2007a. Report on Test in Accordance with the OECD Standard Code for the Official Testing of Agricultural Tractor Performance No. 06-M-5-16. National Institute of Agricultural Engineering, Suwon, Korea
  17. NIAE. 2007b. Report on Test in Accordance with the OECD Standard Code for the Official Testing of Agricultural Tractor Performance No. 05-M-5-5. National Institute of Agricultural Engineering, Suwon, Korea
  18. NTTL. 2006. Report on Test in Accordance with the OECD Standard Code 2 for the Official Testing of Agricultural Tractors No. 1861. Nebraska Tractor Test Laboratory, Lincoln, Nebraska, USA
  19. OECD. 2007. Code I Standard Code for the Official Testing of Agricultural and Forestry Tractor Performance. Organization for Economic Co-operation and Development, Paris, France
  20. SRI. 2005. OECD Restricted Standard Code for the Official Testing of Agricultural and Forestry Tractor Performance No. 2003-6648. Silsoe Research Institute, West Park Silsoe MK45 4HS, UK

Cited by

  1. Pre-processing of load data of agricultural tractors during major field operations vol.42, pp.1, 2015, https://doi.org/10.7744/cnujas.2015.42.1.053
  2. FFT analysis of load data during field operations using a 75-kW agricultural tractor vol.40, pp.1, 2013, https://doi.org/10.7744/cnujas.2013.40.1.053