The Influence of Intake Charge Conditions on Pre-Ignition Reactions for Gasoline-Fueled HCCI Engines (CROSBI ID 591677)
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Podaci o odgovornosti
Vuilleumier, David ; Saxena, Samveg ; Kozarac, Darko ; Dibble, Robert
engleski
The Influence of Intake Charge Conditions on Pre-Ignition Reactions for Gasoline-Fueled HCCI Engines
This study investigates the influence of intake charge conditions on pre-ignition reactions, specifically intermediate temperature heat release (ITHR), in gasoline-fueled HCCI engines. The influence of changes in intake pressure, intake temperature, and equivalence ratio are investigated for their influence on the relative amount of ITHR as a fraction of total heat release. The study of ITHR in gasoline HCCI is critical as the ITHR enables delayed combustion timing which allows high power output while avoiding excessive ringing. The ITHR behavior of gasoline fuel is studied on a 1.9 L Volkswagen TDI engine modified for HCCI operation. 91-Octane E10 commercial grade gasoline is port-injected to produce a relatively homogeneous in-cylinder fuel-air mixture. Experimental tests are conducted for intake pressures from 1.4 bar to 2.0 bar boosted. Intake temperatures are varied in a range that enabled combustion timing (CA50) from TDC to misfire. The equivalence ratio is varied from 0.20 to 0.55. Using the rate of heat release computed from the in-cylinder pressure data, the trends of change of the ITHR magnitude with the change of the intake charge conditions are indentified.
HCCI; ITHR; Gasoline
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Podaci o prilogu
2012.
objavljeno
Podaci o matičnoj publikaciji
Podaci o skupu
Spring Technical Meeting of the Western States Section of the Combustion Institute
predavanje
19.03.2012-20.03.2012
Tempe (AZ), Sjedinjene Američke Države