|
Type
|
Report
|
|
Author
|
Caroline
Nicola Orlebar
|
|
Author
|
Arndt
Joedicke
|
|
URL
|
|
|
Place
|
Warrendale,
PA
|
|
Date
|
2014-04-01
|
|
Institution
|
SAE
International
|
|
Report
Type
|
SAE
Technical Paper
|
|
Abstract
|
Describes
a study of the effects of octane quality on the performance, which is to say,
acceleration and power, and fuel economy (FE) of a late model US vehicle,
powered by a small displacement, turbocharged, gasoline direct injection
(GDI) engine. The relative importance of the gasoline parameters Research and
Motor Octane Number (RON and MON) in meeting the octane requirement of this
engine to run at an optimum spark timing for the given demand was considered
by evaluating the octane index (OI), where OI = (1-K) RON + K MON and K is a constant
depending on engine design and operating conditions. Over wide open throttle
(WOT) accelerations, the average K of the Pontiac Solstice was determined as
−0.75, whereby a lower MON would give a higher OI, a higher knock resistance
and better performance.
Results
from the one car tested for this report support the observation that the K
value of an engine depends on speed and load.
|
|
Report
Number
|
2014-01-1216
|
No comments:
Post a Comment