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research-article

An Experimental Investigation of Churning Power Losses of a Gearbox

[+] Author and Article Information
Joseph Polly

The Ohio State University, Columbus, OH 43210
polly.3@buckeyemail.osu.edu

David Talbot

The Ohio State University, Columbus, OH 43210
talbot.11@osu.edu

Ahmet Kahraman

The Ohio State University, Columbus, OH 43210
kahraman.1@osu.edu

Avinash Singh

General Motors Powertrain, Pontiac, MI 48390
avinash.singh@gm.com

Hai Xu

General Motors Powertrain, Pontiac, MI 48390
hai.1.xu@gm.com

1Corresponding author.

ASME doi:10.1115/1.4038412 History: Received September 08, 2017; Revised October 30, 2017

Abstract

In this study, load-independent (spin) power losses of a gearbox operating under dip-lubrication conditions are investigated experimentally using a final-drive helical gear pair from an automotive transmission as the example system. A dedicated gearbox is developed to operate a single gear or a gear pair under given speed and temperature conditions. A test matrix that consists of sets of tests with (i) a single spur, helical gears, or disks with no teeth, and (ii) helical gear pairs is executed at various temperatures, immersion depths and pinion positions relative to its mating gear. Power losses from single gear and gear pair at identical operating conditions are compared to quantify the components of the total spin loss in the form of losses due to gear drag, gear mesh pocketing, and bearings and seals.

Copyright (c) 2017 by ASME
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