ASTM E 241-1990 提高建筑结构抗水损坏的持久性

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【英文标准名称】:Hydraulicfluidpower-Positivedisplacementpumpsandmotors-Determinationofderivedcapacity.
【原文标准名称】:液压传动.容积式泵和电动机.推导容积的测定
【标准号】:NFE48-354-2008
【标准状态】:现行
【国别】:法国
【发布日期】:2008-07-01
【实施或试行日期】:2008-07-18
【发布单位】:法国标准化协会(FR-AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:松密度测定(纸张);容量测量;定义;位移;位移量;流体技术;液压设备;液压传动;液力发动机;液压泵;液压传动系统;液压装置;容积式机械;容积式泵;泵;符号;测试;单位
【英文主题词】:Bulkdetermination(paper);Capacitymeasurement;Definition;Definitions;Displacement;Displacementvolumes;Fluidtechnology;Hydraulicequipment;Hydraulicfluidpower;Hydraulicmotors;Hydraulicpumps;Hydraulictransmissionsystems;Hydraulics;Positive-displacementmachines;Positive-displacementpumps;Pumps;Symbols;Testing;Units
【摘要】:
【中国标准分类号】:J20
【国际标准分类号】:23_100_10
【页数】:20P.;A4
【正文语种】:其他


Product Code:SAE J1540
Title:Manual Transmission Efficiency and Parasitic Loss Measurement
Issuing Committee:T And B Clutch, Transmission And Power Take-Off Committee
Scope:Because of the intense focus on fuel economy and fuel emission standards, it has become imperative to optimize vehicle drivetrains. In light of this, component efficiencies have become an important factor in the drivetrain decision-making process. It has therefore become necessary to develop a universal standard to judge transmission efficiency.This SAE Recommended Practice specifies a test procedure which maps torque transmittal efficiency and parasitic losses for manual transmissions. The application of this document is intended for manual transmissions used in light (class 4) through heavy truck applications with both simple and compound ratio structures.This document is separated into two parts. The first compares input and output torque throughout a specified input speed range in order to determine the overall transmission efficiency. This test is used to evaluate all forward gears; testing in reverse is optional. The second procedure measures parasitic losses experienced at zero output torque over a range of operating speeds. A procedure for further reduction of this data into a loaded efficiency from gear and bearing systems is also provided.