SAE J2469-1999 Clutch Application Powertrain Startability Rating Requirements for Truck and Bus A.pdf
《SAE J2469-1999 Clutch Application Powertrain Startability Rating Requirements for Truck and Bus A.pdf》由会员分享,可在线阅读,更多相关《SAE J2469-1999 Clutch Application Powertrain Startability Rating Requirements for Truck and Bus A.pdf(5页珍藏版)》请在三一文库上搜索。
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 therefr
2、om, 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. QUESTIONS REGARDING THIS DOCUMENT: (724) 772-8512 FAX: (724) 776-0243 TO PLACE A DOCU
3、MENT ORDER: (724) 776-4970 FAX: (724) 776-0790 SAE WEB ADDRESS http:/www.sae.org Copyright 1999 Society of Automotive Engineers, Inc. All rights reserved.Printed in U.S.A. SURFACE VEHICLE 400 Commonwealth Drive, Warrendale, PA 15096-0001 STANDARD Submitted for recognition as an American National Sta
4、ndard J2469 ISSUED JUL1999 Issued1999-07 Clutch Application Powertrain Startability Rating Requirements for Truck and Bus Applications Foreword This SAE Recommended Practice is presented in response to a need to standardize startability calculation methods and requirements. Powertrain startability i
5、s a key factor in establishing a vehicle powertrain specification that will operate efficiently and give long service life. The four primary factors which affect how long a clutch will last in a given truck are: a.Powertrain specification (engine, clutch, transmission, axle, and tires) b.Control of
6、drivetrain torsional activity c.Driver technique (starting gear selection, engagement technique, driving habits) d.Clutch maintenance (adjustment, lubrication, protection from rust and contamination) The powertrain specification is not only one of these primary factors, but it also can have a major
7、effect on another factor, driver technique. The final indicator of powertrain acceptability is the Startability Rating defined in this document. TABLE OF CONTENTS 1.Scope . 2 1.1Purpose 2 2.References. 2 2.1Applicable Documents 2 2.1.1SAE Publications 2 3.Definitions. 2 4.Technical Requirements. 2 4
8、.1Powertrain Specification. 2 4.2Powertrain Startability Rating. 3 SAE J2469 Issued JUL1999 -2- 1.Scope Although not limited to, these installations are normally used on trucks considered as Medium Duty (Class 6 and 7), as well as Heavy Duty (Class 8). 1.1Purpose This SAE Recommended Practice define
9、s powertrain application startability rating requirements for pull type single and twin plate truck clutches. 2.References 2.1Related Publications The following publications are provided for information purposes only and are not a required part of this document. The following publications define the
10、 existing clutch system design configuration used in trucks and buses. 2.1.1SAE PUBLICATIONS Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001. SAE J373 Housing Internal Dimensions for Single and Two Plate Spring Loaded Clutches SAE J617 Engine Flywheel Housings SAE J1463 Pull Ty
11、pe Clutch Transmission Installation Dimensions SAE J1479 Automotive Pull Type Clutch Terminology SAE J1731 Pilot Bearings for Truck and Bus Applications SAE J1806 Clutch Dimensions for Truck and Bus Applications SAE J1857 Flywheel Dimensions for Truck and Bus Applications 2.1.2TMC PUBLICATIONS Avail
12、able from The Maintenance Council, American Trucking Associations, 2200 Mill Road, Alexandria, VA 22314. TMC RP 633 (T) Effects of Drivetrain Torsionals 3.Definitions The following specific terms as used in the document are defined as follows: a.Heavy-Duty (Class 8) Trucks A truck or tractor rated b
13、y the manufacturer and certified to the US federal government to be for operation at a gross vehicle weight or a gross combination weight of 14 969 kg (33 001 lb) and over. b.Medium-Duty (Class 6 and 7) Trucks A truck or tractor rated by the manufacturer and certified to the US federal government to
14、 be for operation at a gross vehicle weight or a gross combination weight of 8846 kg (19 501 lb) to 14 969 kg (33 000 lb). c.OEM Original Equipment Manufacturer The term used to identify a vehicle s manufacturer. 4.Technical Requirements 4.1Powertrain Specification The powertrain specification inclu
15、des engine performance parameters, clutch size, transmission gear ratios, axle ratio, tire size, powertrain configuration, and vehicle weight. The interaction between these factors can be characterized by a Startability Rating which will be defined in the next section. A brief discussion of the powe
16、rtrain specification factors follows: a.Engine Correctly selecting and matching an engine for a given application requires the consideration of many complex requirements and is beyond the scope of this document. b.Clutch Clutches are primarily selected based on rated clutch torque capacity, which mu
17、st be equal to or greater than the peak torque of the engine selected. In those cases where different sized clutches are available for a given engine and torque rating, the larger clutch with more heat capacity will provide longer life. The clutch disc damper specification should be based on the nee
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- SAE J2469-1999 Clutch Application Powertrain Startability Rating Requirements for Truck and Bus J2469
链接地址:https://www.31doc.com/p-3678376.html