Study on Control Strategy of the Hydro-Mechanical Variable Transmission

Abstract:

The Hydro-mechanical variable transmission (HMT) is an infinitely variable and high efficient multi-power flow transmission, whose stepless speed ratio changing process includes speed ratio changing in range and power shift. In this paper, a HMT control strategy is proposed that includes four components: speed control strategy in range, power shift condition, power shift logics and power shift control strategies. The simulation results of the two-range HMT demonstrate that the proposed control strategy can stabilize the engine speed to the target operating area near the optimal speed and can satisfy demands of the vehicle acceleration, slide and brake.

• Periodical: Applied Mechanics and Materials (Volumes 541-542)
• Pages: 1168-1172
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.541-542.1168
• Online since: March 2014
• Authors: Shu Jun Yang, Hui Pan, Wen Feng Wang, Jian Din, Xiao Juan Jiao
• Keywords: Control Strategy, Hydraulic Mechanical Variable Transmission, Infinitely Variable Transmission

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