DIN 4844 T.1 Bb.14-1980 安全标志.安全符号W9

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Product Code:SAE J2188
Title:Commercial Truck and Bus SAE Recommended Procedure for Vehicle Performance Prediction and Charting
Issuing Committee:Truck And Bus Advanced And Hybrid Powertrain Steering Comm
Scope:This SAE Recommended Practice takes into account modern standardized methods for collecting and summarizing data that has an effect on vehicle steady-state performance, such as engine output (gross and net), transmission losses, drivetrain efficiency, vehicle aerodynamic devices for various vehicle and body configurations, as well as road surface variations and air density variations resulting from altitude and barometric effects. The procedure does not address vehicle transient performance (acceleration, braking, and cornering), because of the considerable amount of additional data required such as moment of inertia of all the rotating parts. Nor does it address vehicles with torque converters and automatic transmissions. This document is, therefore, intended for vehicles having fixed-ratio type transmissions and positive engagement clutches. Metric and ISO unit conversions are provided in the metric conversion tables at the end of this procedure (see Appendix B).Some modern vehicles with electronic engine controls have the ability to vary the maximum engine revolutions for each gear, as well as permitting the power or rpm to increase if more time is spent in the lower gears, as when climbing a grade. These special cases can be handled by this procedure, just by customizing the data for each transmission ratio and superimposing the long-term data on top of the instantaneous data.All of the equations are written in a form suitable for programming into a mainframe or desk-top computer, using a spreadsheet/database or a higher level language, such as Basic, Fortran, Pascal, C or Unix, etc. However, they are simple enough, to be performed on a hand-held calculator.

标准名称：	车用压缩天然气
英文名称：	Compressed natural gas as vehicle fuel
中标分类：	石油 >> 石油、天然气 >> 天然气
ICS分类：	石油及相关技术 >> 天然气
替代情况：	SY/T 7546-1996
发布部门：	中华人民共和国国家质量监督检验检疫总局
发布日期：	2000-04-03
实施日期：	2000-07-01
首发日期：	2000-04-03
作废日期：	1900-01-01
主管部门：	中国石油天然气集团公司
归口单位：	全国天然气标准化技术委员会
起草单位：	中国石油天然气集团公司
出版社：	中国标准出版社
出版日期：	1900-01-01
页数：	6页

本标准规定了车用压缩天然气的技术要求和试验方法。本标准适用于压力不大于25MPa，作为车用燃料的压缩天然气。

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