Energy Consumption Analysis of 2Z-X(B) Planetary Input-Coupled Hydro-Mechanical Tractor Transmission
Source abstract
Abstract
The hydro-mechanical transmission (HMT) of continuously variable transmission tractors typically achieves speed regulation using a 2Z-X(A) planetary gear system. Long-term use of this setup has created a strong patent barrier, hindering further HMT structural innovation. This study systematically examines the energy consumption characteristics of HMTs based on a 2Z-X(B) planetary gear set configuration, aiming to provide a theoretical reference for developing new HMT tractors. First, the powertrains of both 4-range and 2-range HMTs using this configuration are described. Next, a mathematical model of the 4-range HMT is developed, and its hydrostatic power portion, transmission efficiency, and fuel consumption are analyzed. Finally, the energy consumption characteristics of the 2-range HMT are compared with those of the 4-range HMT, highlighting their performance differences. Results indicate that HMTs based on the 2Z-X(B) planetary gear set exhibit similar efficiency characteristics to traditional systems, with a maximum efficiency exceeding 90%. The impact of efficiency on HMT fuel economy is greater than that of engine fuel consumption itself, suggesting that an efficiency-prioritized power matching control strategy is feasible.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Electric and Hybrid Vehicle Technologies · Hydraulic and Pneumatic Systems · Gear and Bearing Dynamics Analysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Mechanical and Electronic Engineering, Shandong Agricultural University, Taian 271018, China
Shandong Weifang Luzhong Tractor Co., Ltd., Weifang 261057, China
College of Engineering, Ocean University of China, Qingdao 266404, China
National Engineering Research Center of Agricultural Production Machinery and Equipment, Taian 271018, China
Funding
Shandong Province Agricultural Machinery R&D, Manufacturing, Promotion and Application Integration Pilot Project · Shandong Provincial Natural Science Foundation
References (28)
Show source-provided references
1. Unified modeling of a tractor performance prototype based on ontology10.1139/tcsme-2021-0124 ↗
2. Li, B., Pan, J., Li, Y., Ni, K., Huang, W., Jiang, H., and Liu, F. (2023). Optimization method of speed ratio for power-shift transmission of agricultural tractor. Machines, 11.10.3390/machines11040438 ↗
3. Optimization of the transmission characteristics of an HMCVT for a high-powered tractor based on an improved NSGA-II algorithm10.1177/09544070211067961 ↗
4. Research on transmission characteristics of hydromechanical continuously variable transmission of tractor
5. On the advantages of the new power-split infinitely variable transmission over conventional mechanical transmissions based on fuel consumption analysis10.1016/j.jclepro.2019.118795 ↗
6. Fuel consumption reduction in urban buses by using power split transmissions10.1016/j.enconman.2013.03.019 ↗
7. Optimizing the fuel economy of hydrostatic power-split system in continuously variable tractor transmission10.1016/j.heliyon.2023.e15915 ↗
8. Wirkungsgraduntersuchung des systems “Dieselmotor-Leistungsverzweigtes Getriebe”
9. Development of an integrated engine-hydro-mechanical transmission control algorithm for a tractor10.1177/1687814015593870 ↗
10. Optimal design of a power-split hybrid hydraulic bus10.1177/0954407015621817 ↗
11. Split transmission of tractor with automatic gearbox10.1016/j.proeng.2017.10.705 ↗
12. Rao, Z. (2019). Design of Planetary Gear Transmission, Chemical Industry Press Co., Ltd.. [2nd ed.].
13. Li, J., Zhao, Y., Zhai, Z., Han, B., Du, Y., Wang, L., and Zhu, Z. (2020). Research on design and analysis method of the double planetary HMCVT based on high efficiency transmission. Agriculture, 12.10.3390/agriculture12111958 ↗
14. Optimisation of the power-cycle hydro-mechanical parameters in a continuously variable transmission designed for agricultural tractors10.1016/j.biosystemseng.2019.11.009 ↗
15. Dynamic characteristic analysis and clutch engagement test of HMCVT in the high-power tractor10.1155/2021/8891127 ↗
16. Coordinated dual-rolling control of shifting in HMCVT based on KF-MPC algorithm with anti-disturbance capabilities10.1016/j.compag.2024.109561 ↗
17. Multi-objective optimization of hydro-mechanical power split transmissions10.1016/j.mechmachtheory.2012.11.009 ↗
18. Optimization of components and layouts of hydromechanical transmissions10.1080/14399776.2017.1296746 ↗
19. Nguyen, V.T. (2013). Study on Dynamic Characteristics of Hydro Mechanical Continuously Variable Transmission of Tractor. [Ph.D. Thesis, Nanjing Agricultural University].
20. Full-condition efficiency model and power loss analysis of hydro-mechanical CVT
21. HMCVT steady state transmission efficiency based on HST-EGT torque ratio
22. Wang, G. (2014). Study on Characteristics, Control and Fault Diagnosis of Tractor Hydro-Mechanical CVT. [Ph.D. Thesis, Nanjing Agricultural University].
23. Control strategies for a powertrain with hydromechanical transmission10.1016/j.egypro.2018.08.064 ↗
24. D’Andrea, D., Risitano, G., and Alberti, F. (2022). Fuel consumption reduction and efficiency improvement in urban street sweeper using power split with lockup clutch transmission. Appl. Sci., 12.10.3390/app121910160 ↗
25. Functional design of power-split CVTs: An uncoupled hierarchical optimized model10.1016/j.mechmachtheory.2017.06.003 ↗
26. Direct analysis of power-split CVTs: A unified method10.1016/j.mechmachtheory.2017.10.006 ↗
27. Renius, K.T. (2020). Fundamentals of Tractor Design, Springer Nature. [1st ed.].10.1007/978-3-030-32804-7 ↗
28. Meyer, H.J. (2009). Fahrzeuggetriebetechnik Getriebe in Traktoren, Technische Universität Berlin.