This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
LP-GAS OCTAN NUMBERS AND THEIR RELATIONSHIP TO ENGINE PERFORMANCE
Annotation ability available
Sector:
Language:
English
Abstract
An investigation has been made of the relationship between LP-Gas characteristics and the knock-limited performance of several bus and truck engines over a range of design and operating conditions. This work has shown that:
-
A.
The knock-limited spark advance characteristics of LP-Gas blends in the engines tested could be rationalized in terms of the Research and Motor octane numbers calculated and determined for the blends.
-
B.
The three most severe truck engines investigated in this program have an LP-Gas antiknock requirement of 90.5 octane number at a point called Severity “E”. A nomograph has been developed which can be used to define Severity “E” and can also be used to test an LP-Gas blend of known composition for its suitability in meeting this octane requirement.
-
C.
Sufficient data were obtained in this program to demonstrate that if carburetor air or mixture temperatures are not controlled to reasonable limits, satisfactory knock-free operation will not be experienced in all heavy duty engines with pure propane.
-
D.
The unique knock limited characteristics of LP-Gas in these heavy duty engines, basically designed for gasoline, suggest that a new approach is required to design mechanical octane numbers for gaseous fuels.
Citation
ARMOR, W., INGERSON, H., HILF, A., JOBARIS, J. et al., "LP-GAS OCTAN NUMBERS AND THEIR RELATIONSHIP TO ENGINE PERFORMANCE," SAE Technical Paper 590269, 1959, https://doi.org/10.4271/590269.Also In
References
- Alden R. C. “The Availability of LPG for Direct Motor Fuel Use,” Petroleum Processing 5 11 1180 86 1950
- Raymond Leonard “Liquefied Petroleum Gas as a Fuel for Automotive Vehicles,” preprint No. 535 SAE National Fuels and Lubricants Meeting Nov. 9-10, 1950
- Alden R. C. Selim F. E. “LP-Gas for Motor Fuel,” preprint No. 548 SAE Annual Meeting Jan. 8-12, 1951
- Samuelson M. J. “Comparative Operating Data of Tractors Using Gasoline or Liquefied Petroleum Gas Fuel,” preprint No. 550 SAE Annual Meeting Jan. 8-12, 1951
- George A. J. St. “Engine and Carburetion Equipment Requirements of Liquefied Petroleum Gas Fuel,” preprint No. 549 SAE Annual Meeting Jan. 8-12, 1951
- Glidewell J. E. “Engines to Digest the Vitamin Enriched Fuel-Elpeegee,” preprint No. 785 SAE National West Coast Meeting Aug. 11-13, 1952
- Jobaris J. N. “Chicago Transit Authority Reports on Propane,” preprint No. 191, SAE National Fuels and Lubricants Meeting Nov. 4-6, 1953
- Ebinger J. E. Selim F. E. Unterreiner R. W. “The Evaluation of the Effect of Propylene in Propane Used as a Motor Fuel,” preprint No. 409 SAE National Fuels and Lubricants Meeting Nov. 4-5, 1954
- Loftin C. F. “The Application of LP-Gas to Light Automotive Equipment,” preprint No. 98B SAE National Transportation Meeting Oct. 20-23, 1958