Development of a Standard Spin Loss Test Procedure for 4WD Transfer Cases Chrysler Group LLC

Format:

Conference/Event

Author/Creator:

Kirk, Kirk, author.

Contributor:

D'Anna, Thomas

Ilyas, Syed M.

Perakes, Andreas E.

Ross, Craig S.

Conference Name:

SAE 2012 World Congress & Exhibition (2012-04-24 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2012

Summary:

As vehicle fuel economy continues to grow in importance, the ability to accurately measure the level of parasitic losses on all driveline components is required. A standardized comparison procedure enables manufacturers and suppliers to measure component losses consistently, in addition to offering a reliable process to assess enablers for efficiency improvements. This paper reviews the development of a comprehensive test procedure to measure transfer case speed-dependent parasitic losses at key speed, load, and environmental conditions. This procedure was validated for repeatability considering variations in soak time, temperature measurement positions on the transfer case, and test operating conditions. Additional assessments of spin loss at low ambient temperatures, and the effect of component break-in on spin loss were also conducted. The resultant procedure is proposed as a new SAE J-standard (Surface Vehicle Recommended Practice J2985) for release by the All Wheel Drive (AWD) Standards Committee.This project was undertaken and financially supported by the Transmission Working Group of the United States Council of Automotive Research (USCAR) for the SAE AWD Standards Committee

Notes:

Vendor supplied data

Publisher Number:

2012-01-0306

Access Restriction:

Restricted for use by site license