This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Investigations of Sump Design to Improve the Thermal Management of Oil Temperature During Engine Warm Up
Published May 20, 2007 by Institution of Mechanical Engineers in United Kingdom
Modifications to the sump design of a 2.4l diesel engine have been explored as a way to achieve a reduction in engine friction, and hence fuel consumption, during engine warm-up. The aim was to raise the temperature of oil supplied to the main gallery of the lubrication system by increasing temperature stratification in the sump and feeding hotter oil to the oil pump inlet. The best design gave a peak increase of 12°C (relative to the original production design of sump) in main gallery temperature following starts at -10°C. This reduced engine friction by up to 50 kPa, representing a reduction of more than 10%, over the first two minutes of engine operation.