SAE J1829 Stoichiometric Air-Fuel Ratios of Automotive Fuels

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Product Code:SAE J1829
Title:Stoichiometric Air-Fuel Ratios of Automotive Fuels
Issuing Committee:Fuels And Lubricants Tc 7 Fuels
Scope: The mass of air required to burn a unit mass of fuel with no excess of oxygen or fuel left over is known as the stoichiometric air-fuel ratio. The ratio varies appreciably over the wide range of fuels聴gasolines, diesel fuels, and alternative fuel聴-that might be considered for use in automotive engines. Although performance of engines operating on different fuels may be compared at the same air-fuel ratio of same fuel-air ratio, it is more appropriate to compare operation at the same equivalence ratio, for which a knowledge of stoichiometric air-fuel ratio is a prerequisite. This SAE Recommended Practice summarizes the computation of stoichiometric air-fuel ratios from a knowledge of a composition of air and the elemental composition of the fuel without a need for any information on the molecular weight of the fuel.

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基本信息

标准名称：	自动埋弧焊刚性对接裂纹试验方法
中标分类：	船舶 >> 船舶综合 >> 船舶用材料及其检验方法
ICS分类：	造船和海上建筑物 >> 船舶和海上建筑物综合 >> 造船用材料和零件
发布部门：	中国船舶工业总公司
发布日期：	1995-06-19
实施日期：	1996-04-01
首发日期：	1900-01-01
作废日期：	1900-01-01
提出单位：	全国海洋船标准技术委员会船用材料应用工艺分技术委员会
归口单位：	中国船舶工业总公司第七研究院七二五研究所
起草单位：	中国船舶工业总公司第七研究院七二五研究所等
起草人：	易传宝、陈钧毅、瞿波
出版社：	中国标准出版社
出版日期：	1996-04-01
页数：	7页

适用范围

本标准规定了自动埋弧焊刚性对接裂纹试验用材料、装置、试验程序和裂纹率的计算方法。
本标准适用于船体结构用低合金高强度钢、海洋平台及钢及其配套自动埋弧焊丝、焊剂的焊接裂纹试验。

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所属分类：船舶船舶综合船舶用材料及其检验方法造船和海上建筑物船舶和海上建筑物综合造船用材料和零件

Product Code:SAE AIR1387
Title:Designing With Elastomers for Use At Low Temperatures, Near Or Below Glass Transition
Issuing Committee:Ams Ce Elastomers Committee
Scope:To ensure success in design of elastomeric parts for use at low temperature, the design engineer must understand the peculiar properties of rubber materials at these temperatures.There are no static applications of rubber. The Gaussian theory of rubber elasticity demonstrates that the elastic characteristic of rubber is due to approximately 15% internal energy and the balance, 85%, is entropy change. In other words, when an elastomer is deformed, the elastomer chain network is forced to rearrange its configuration thereby storing energy through entropy change. Thermodynamically, this means that rubber elasticity is time and temperature dependent (Reference 25).The purpose of this report is to provide guidance on low temperature properties of rubber with the terminology, test methods, and mathematical models applicable to rubber, and to present some practical experience. In this way, it is hoped that mistakes can be avoided, particularly in selection of rubber materials, enabling the design engineer to weigh low-temperature material properties together with the many other factors involved in the design process.