A New Validation of Spray Penetration Models for Modern Heavy Duty Diesel Fuel Injectors

2017 ◽  
Author(s):  
Russell P. Fitzgerald ◽  
Christopher Gehrke ◽  
Kenth Svensson ◽  
Glen Martin
Keyword(s):  
Diesel Fuel ◽  
Heavy Duty ◽  
Spray Penetration ◽  
Fuel Injectors ◽  
Heavy Duty Diesel

The Development of a “Pin-on-Twin” Scuffing Test to Evaluate Materials for Heavy-Duty Diesel Fuel Injectors

2007 ◽  
Vol 50 (1) ◽  
pp. 50-57 ◽  
Author(s):  
Jun Qu ◽  
John J. Truhan ◽  
Peter J. Blau ◽  
Ronald Ott
Keyword(s):  
Diesel Fuel ◽  
Heavy Duty ◽  
Fuel Injectors ◽  
Heavy Duty Diesel

Detecting the onset of localized scuffing in a pin-on-twin fuel-lubricated test for heavy-duty diesel fuel injectors

2005 ◽  
Vol 6 (1) ◽  
pp. 1-9 ◽  
Author(s):  
J Qu ◽  
J J Truhan ◽  
P J Blau
Keyword(s):  
Diesel Fuel ◽  
Aviation Fuel ◽  
Sliding Velocity ◽  
Heavy Duty ◽  
Fuel Injectors ◽  
Test Conditions ◽  
Aisi 52100 ◽  
Aisi 52100 Steel ◽  
Heavy Duty Diesel ◽  
Direction Reversal

Scuffing, usually considered to result from lubrication failure, severely limits the life of heavy-duty diesel fuel injectors. A new method is introduced to detect the onset of localized scuffing and monitor scuffing propagation in a fuel-lubricated ‘pin-on-twin’ reciprocating tribosystem. Tests were conducted on annealed and hardened AISI 52100 steel lubricated by on-highway #2 diesel fuel and ultra-low-sulphur Jet A aviation fuel. Unlike most current reciprocating tests that use changes in the nominal (averaged) friction to detect scuffing, this study analyses the detailed friction traces of individual strokes. The correlation between the change in the friction traces and the onset and progression of scuffing has been validated by examining the surface morphology of wear scars. This method was then applied to study the scuffing characteristics under various test conditions. Generally, scuffing initiated earlier and propagated more rapidly the higher the load, the lower the reciprocating frequency, and the poorer the lubricity of the fuel. The stroke ends, where direction reversal occurred, were especially vulnerable to scuffing due to their low sliding velocity.

A Study on Adaptability of the Engine Control Module of an Existing Heavy Duty Diesel Engine to Optimize the Engine Performance With F-T Diesel Fuel

2007 ◽  
Author(s):  
Praveen Kandulapati ◽  
Chuen-Sen Lin ◽  
Dennis Witmer ◽  
Thomas Johnson ◽  
Jack Schmid ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Diesel Fuel ◽  
Load Condition ◽  
Engine Performance ◽  
Injection Timing ◽  
Heavy Duty ◽  
Synthetic Fuels ◽  
Control Module ◽  
Heavy Duty Diesel Engine ◽  
Heavy Duty Diesel

Synthetic fuels produced from non-petroleum based feedstocks can effectively replace the depleting petroleum based conventional fuels while significantly reducing the emissions. The zero sulfur content and the near zero percentage of aromatics in the synthetic fuels make them promising clean fuels to meet the upcoming emissions regulations. However due to their significantly different properties when compared to the conventional fuels; the existing engines must be tested extensively to study their performance with the new fuels. This paper reports a detailed in-cylinder pressure measurement based study made on adaptability of the engine control module (ECM) of a modern heavy duty diesel engine to optimize the engine performance with the F-T diesel fuel. During this study, the F-T and Conventional diesel fuels were tested at different loads and various injection timing changes made with respect to the manufacturer setting. Results from these tests showed that the ECM used significantly different injection timings for the two fuels in the process of optimizing the engine performance. For the same power output the ECM used a 2° advance in the injection timing with respect to the manufacturer setting at the full load and 1° retard at the no load condition. While the injection timings used by the ECM were same for both the fuels at the 50% load condition. However, a necessity for further changes in the control strategies used by the ECM were observed to get the expected advantages with the F-T fuels.

Sign in / Sign up

Export Citation Format

Share Document