SAE J 312-2010 Automotive Gasolines《汽车汽油》.pdf
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1、_SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising theref
2、rom, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2010 SAE International All rights reserved. No part of this publication ma
3、y be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-4970 (outside US
4、A) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/J312_201011SURFACEVEHICLERECOMMENDEDPRACTICEJ312 NOV2010 Issued 1931-01Revised 2010-11Supersedi
5、ng J312 FEB2001 Automotive Gasolines RATIONALEGasoline accounts for nearly half of all crude oil consumed in the U.S. The oil, automobile, and fuel additive industries have worked together for many decades to determine the composition and properties of gasoline required to provide satisfactory vehic
6、le operation. This work is ongoing. Since the late 1960s, environmental concerns have led to federal and state regulations to reduce emissions from vehicles and from petroleum storage and transportation facilities. This SAE Recommended Practice discusses the characteristics of gasoline, common test
7、methods, specifications developed by ASTM International, government regulations, and the effects of gasoline composition and properties on vehicle performance, fuel economy, emissions, and durability. FOREWORDAutomotive gasolines are used to fuel internal combustion spark-ignition engines. While gas
8、olines discussed herein are used primarily in passenger car and highway truck service, they are also used extensively in off-highway utility vehicles and farm machinery, two-stroke and four-stroke cycle marine engines, and other spark-ignition engines employed in a variety of different service appli
9、cations. Automotive gasolines are essentially blends of numerous hydrocarbons derived from petroleum. To produce gasoline, refiners initially use fractional distillation of the crude oil to segregate those hydrocarbons in the gasoline boiling range, with finished gasolines encompassing a boiling ran
10、ge of about 30 to 225 C (86 to 437 F). A number of processes can then be used to: a. Increase the yield of gasoline from a barrel of crude oil by converting larger-molecule (higher-boiling) and smaller-molecule (lower-boiling) hydrocarbons to hydrocarbons in the gasoline boiling range; or b. Convert
11、 low-octane number hydrocarbons to high-octane number hydrocarbons.The primary processes used by todays refiners are: 1. Catalytic cracking, which converts higher-boiling hydrocarbons into hydrocarbons in the gasoline boiling range. 2. Reforming, which converts low-octane number hydrocarbons to high
12、er-octane number hydrocarbons. 3. Alkylation, which converts gaseous hydrocarbons to high-octane number liquid hydrocarbons. 4. Isomerization, which upgrades the octane quality of light straightrun gasoline by converting straight-chain paraffins to their branched-chain isomers. 5. Hydrocracking, in
13、which cracking occurs in the presence of both hydrogen and a catalyst, to produce a less olefinic gasoline component. SAE J312 Revised NOV2010 Page 2 of 36Reforming was increasingly used during the 1970s and 1980s to replace the octane numbers lost by the requirement for unleaded gasoline in modern
14、automobiles and the resulting reduction and eventual elimination of lead antiknock usage. Because of environmental restrictions on the aromatic content of gasoline (under the Environmental Protection Agencys Complex Model for reformulated gasoline), alkylation and isomerization are becoming more imp
15、ortant. Ethanol is also now contributing significant octane number benefits. Gasolines are blended to satisfy diverse automobile requirements. Antiknock rating, volatility, and other properties are balanced to provide satisfactory vehicle performance. Additives are used to provide or enhance specifi
16、c performance features and have become increasingly important in late-model vehicles. Up to 10 volume percent ethanol is used as a blending component in gasoline, as discussed in Section 9. This SAE Recommended Practice summarizes the significance of the more important physical and chemical characte
17、ristics of automotive gasolines, and describes pertinent test methods for defining or evaluating these properties. Information on properties of automotive gasolines currently marketed in service stations throughout the United States can be found in semiannual reports issued by Northrop Grumman Missi
18、on Systems (formerly TRW Petroleum Technologies, BDM Petroleum Technologies, and the National Institute for Petroleum and Energy Research (NIPER). The Alliance of Automobile Manufacturers conducts semiannual surveys of gasoline quality in the U.S., and to a limited extent in Canada and Mexico. A num
19、ber of proprietary surveys are also conducted. 1. SCOPE This SAE Recommended Practice summarizes the composition of modern automotive gasolines, the significance of their physical and chemical characteristics, and the pertinent test methods for defining or evaluating these properties. 2. REFERENCES
20、2.1 Applicable Documents The following publications form a part of this specification to the extent specified herein. Unless otherwise indicated, the latest issue of SAE publications shall apply. 2.1.1 SAE Standards Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001,
21、 Telephone 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org.SAE J1082 Fuel Economy Measurement - Road Test Procedure SAE J1297 Alternative Automotive Fuels SAE J1349 Engine Power Test Code Spark Ignition and Compression Ignition Net Power Rating SAE J1498 Heating Value
22、 of Fuels SAE J1681 Gasoline, Alcohol, and Diesel Fuel Surrogates for Materials Testing SAE J1829 Stoichiometric Air-Fuel Ratios of Automotive Fuels SAE J312 Revised NOV2010 Page 3 of 362.1.2 ASTM Standards Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, P
23、A 19428-2959, Tel: 610-832-9585, www.astm.org.ASTM D56 Standard Test Method for Flash Point by Tag Closed Cup Tester ASTM D86 Standard Test Method for Distillation of Petroleum Products at Atmospheric Pressure ASTM D130 Standard Test Method for Corrosiveness to Copper from Petroleum Products by Copp
24、er Strip Test ASTM D381 Standard Test Method for Gum Content in Fuels by Jet Evaporation ASTM D445 Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity) ASTM D471 Standard Test Method for Rubber Property - Effect of Liquids ASTM D525 St
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