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New Generation Hydraulic-Mechanical Transmission with Lock-up Mechanisms and Automatic Start Clutch

Journal Article
2008-32-0040
ISSN: 1946-3936, e-ISSN: 1946-3944
DOI: https://doi.org/10.4271/2008-32-0040
Published September 09, 2008 by SAE International in United States
New Generation Hydraulic-Mechanical Transmission with Lock-up Mechanisms and Automatic Start Clutch
Sector:
Citation: Yoshida, Y., Yakigaya, N., Nakamura, K., Takeuchi, K. et al., "New Generation Hydraulic-Mechanical Transmission with Lock-up Mechanisms and Automatic Start Clutch," SAE Int. J. Engines 1(1):1381-1388, 2009, https://doi.org/10.4271/2008-32-0040.
Language: English

Abstract:

New Generation Advanced Hydraulic-Mechanical Transmission (A-HMT) with the Lock-Up mechanism and the automatic start clutch mechanism was developed. In the lock-up mechanism, an electronic control in conjunction with transmission control was adopted using oil temperature, throttle opening, and input / output rotation ratio as parameter to reduce a rotational energy change of input and output axis caused by the volumetric efficiency of A-HMT. In the automatic start clutch, the load sensing function, damper function, and cooling function by replacing the simple hydraulic mechanism are equipped. By these solutions, the transmission efficiency has enhanced approximately 10% compared with former A-HMT, and excellent starting performance and smooth transmission performance have achieved.

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