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 ther
2、efrom, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2015 SAE International All rights reserved. No part of this
3、publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-49
4、70 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/J1726_201507 SURFACE VEHICLE RECOMMENDED PRACTICE J1726 JUL2015 Issued 1995-12 R
5、evised 2015-07 Superseding J1726 FEB2010 Charge Air Cooler Internal Cleanliness, Leakage, and Nomenclature RATIONALE This document has been amended to include Air-to-Air Charge Air Cooler (CAC) internal chemical cleanliness as it applies to residual flux from Controlled Atmosphere Brazing (CAB). Thi
6、s chemical cleanliness requirement, which has been added, typically relates to only Natural Gas Engine applications that can be adversely affected by braze flux residue. The CAC debris cleanliness has been modified to include the maximum individual debris particle weight. Those requiring CAC cleanli
7、ness results should specify J1726 Chemical Internal Cleanliness, J1726 Debris Internal Cleanliness, or J1726 Chemical usually determined or set as the most severe conditions the heat exchanger will operate under continuously. 8.2.13 Outlet Pressure The pressure of the fluids as they exit the heat ex
8、changer. 8.2.14 Outlet Temperature The temperature of the fluids as they exit the heat exchanger. 8.2.15 Pressure Drop The difference in fluid pressures as measured between the inlet and outlet of the heat exchanger or heat exchanging system. 8.2.16 Temperature Drop The difference in the fluid tempe
9、ratures as measured between the inlet and outlet of the heat exchanger or heat exchanging system. 8.2.17 Temperature Effectiveness The ratio of the inlet charge air temperature minus the outlet charge air temperature divided by the inlet temperature differential. 8.2.18 Test Conditions The condition
10、s under which the heat exchanger is tested to determine its effectiveness and pressure drop, usually the same as the operating conditions. 9. SCHEMATICS OF TYPICAL CHARGE AIR COOLERS 9.1 Air-to-Coolant Heat Exchangers 9.1.1 Mounted in the intake manifold (see Figures 2 and 3) 9.1.2 Mounted remotely
11、(see Figures 4 and 5) SAE INTERNATIONAL J1726 Revised JUL2015 Page 11 of 14 Figure 2 - Air-to-coolant - mounted in intake manifold Figure 3 - Air-to-coolant - mounted in intake manifold SAE INTERNATIONAL J1726 Revised JUL2015 Page 12 of 14 Figure 4 - Air-to-coolant - mounted remotely Figure 5 - Air-
12、to-coolant - mounted remotely SAE INTERNATIONAL J1726 Revised JUL2015 Page 13 of 14 9.2 Air-to-Air Heat Exchangers 9.2.1 Engine fan cooled (see Figure 6) 9.2.2 Auxiliary blower cooled (see Figure 7) Figure 6 - Air-to-air - engine fan cooled - mounted remotely Figure 7 - Air-to-air - auxiliary blower
13、 cooled - mounted remotely SAE INTERNATIONAL J1726 Revised JUL2015 Page 14 of 14 10. NOTES 10.1 Marginal Indicia A change bar (l) located in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes, have been made to the previous issue of
14、this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. PREPARED BY THE SAE COOLING SYSTEMS STANDARDS COMMITTEE
