Product Code:SAE J2453
Title:Manual Transmission and Transaxle Efficiency and Parasitic Loss Measurement (STABILIZED Sep 2011)
Issuing Committee:Sae Ic Powertrain Steering Committee
Scope:Because of the intense focus on CAFE and fuel emission standards, optimization of the automobile drivetrain is imperative. 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 the dynamometer test procedure which maps a manual transmission's efficiency. The document is separated into two parts. The first compares input and output torque throughout a specified input speed range in order to determine 'in-gear' transmission efficiency. The second procedure measures parasitic losses experienced while in neutral at nominal idling speeds and also churning losses while in gear.The application of this document is intended for passenger car and light truck.All references to transmissions throughout this document include transaxles.

标准名称：	玻璃工业用石英砂的分级
中标分类：	矿业 >> 非金属矿 >> 建材原料矿
发布部门：	中国轻工总会
发布日期：	1996-01-31
实施日期：	1996-09-01
首发日期：	1900-01-01
作废日期：	1900-01-01
归口单位：	全国玻璃仪器标准化中心
起草单位：	全国玻璃仪器质量监督检测中心;参加起草单位有陕西省秦川玻璃
出版日期：	1900-01-01
页数：	4页

本标 准 规 定了玻璃工业用石英砂的分级和试验方法，适用于各种玻璃工业用的经过加
工的石英砂。

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