The Effect of Forced Cool Down on Cold Start Test Repeatability

2009-01-1976

06/15/2009

Event
Powertrains, Fuels and Lubricants Meeting
Authors Abstract
Content
Increasing the number of cold-start engine cycles which could be run in any one day would greatly improve the productivity of an engine test facility. However with the introduction of forced cooling procedures there is the inherent risk that test-to-test repeatability will be affected. Therefore an investigation into the effects caused by forced cooling on fuel consumption and the temperature distribution through the engine and fluids is essential. Testing was completed on a 2.4 litre diesel engine running a cold NEDC. The test facility utilises a basic ventilation system, which draws in external ambient air, which is forced past the engine and then drawn out of the cell. This can be supplemented with the use of a spot cooling fan. The forced cool down resulted in a much quicker cool down which was further reduced with spot cooling, in the region of 25% reduction. The implementation of forced cooling was found to have a small but repeatable effect on the fuel consumption, around 1%, and the fluid temperature distribution through the engine. Using this data it is possible to increase the number of cold start tests performed per day from one to three.
Meta TagsDetails
DOI
https://doi.org/10.4271/2009-01-1976
Pages
6
Citation
Lewis, A., Brace, C., and Cox, A., "The Effect of Forced Cool Down on Cold Start Test Repeatability," SAE Technical Paper 2009-01-1976, 2009, https://doi.org/10.4271/2009-01-1976.
Additional Details
Publisher
Published
Jun 15, 2009
Product Code
2009-01-1976
Content Type
Technical Paper
Language
English