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Reduction of Churning Loss by Applying Computer-aided Engineering Taking Into Account the Condition of the Gas-Liquid Mixed-Phase Flow
FISITA2016/F2016-THBB-002

Authors

Gotou, Masaru; Fukuda, Kazuya; Ide, Atsuyuki; Iida, Masashi; Uchida, Tadaomi - JATCO Ltd, Japan; JATCO Engineering Ltd, Japan

Abstract

KEYWORDS – Transmission, Performance/fuel economy/efficiency, Continuously variable transmission, Computational fluid dynamics, Churning loss

ABSTRACT –
It is important to reduce churning loss for improving transmission efficiency. Previously, simulations of fluid flow in the transmission interior were often executed component by component or only for some parts of the whole transmission. In this development project, the whole transmission, including the interior parts, was included in a computer-aided engineering simulation model, and the condition of the gas-liquid mixed-phase flow was also taken into account. Based on the simulation results, churning loss was markedly reduced in a newly developed CVT with an auxiliary gearbox.

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