An Engine Dynamometer Test for Evaluating Port Fuel Injector Plugging 872111
An engine dynamometer test procedure was developed for evaluating fuel and fuel additive effects on the plugging of port fuel injectors. The test procedure was shown to adequately reflect the influence of fuels and additives on injector plugging in vehicles. Injector soak temperature and fuel system configuration were found to be critical factors in obtaining an acceptable engine-vehicle correlation.
Injector plugging occurred in as little as 10 hours with a high-olefin base fuel; in contrast, plugging took two orders of magnitude longer with a high-quality, detergent-containing, commercial-type fuel. Furthermore, fuel additives greatly increased plugging resistance with the OEM, pintle-type injectors.
Injector design alterations were also shown to be important. Pintle-type injectors with flared, aluminum caps extended plugging time considerably relative to the same injector design with plastic caps. Director plate-type injectors were much better still.
Citation: Caracciolo, F. and Stebar, R., "An Engine Dynamometer Test for Evaluating Port Fuel Injector Plugging," SAE Technical Paper 872111, 1987, https://doi.org/10.4271/872111. Download Citation
Author(s):
Frank Caracciolo, Russell F. Stebar
Affiliated:
General Motors Research Laboratories Warren, MI
Pages: 16
Event:
1987 SAE International Fall Fuels and Lubricants Meeting and Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
SAE 1987 transactions: Fuels and Lubricants-V96-7
Related Topics:
Fuel additives
Test procedures
Fuel systems
Drag
Aluminum
Plastics
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