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Engine Cooling Systems~Developing Sound Approaches for Assessing System Hardware Changes
Technical Paper
2007-04-0028
Sector:
Language:
English
Abstract
The aim of the work reported in this paper was to undertake a detailed experimental approach under both steady state and transient events complemented by statistical assessments to assess the effects of cooling system hardware changes on diesel engine fuel economy. Also, to develop techniques for assessing the thermal integrity of the engine as a consequence of such changes as well as providing diagnostic support of the test data. Utilizing a combination of water pump throttling, coolant flow control through the oil cooler and adoption of a pressure regulating thermostat (PRT) within a DoE test sequence fuel economy benefits of around 4% were observed under steady state conditions. However, these benefits were not observed during drive cycle evaluations.