SAE J1393-2004 重型车辆冷却试验规程R.pdf
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1、 SURFACE VEHICLE RECOMMENDED PRACTICE (R) Heavy Duty Vehicle Cooling Test Code R 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 suit
2、ability for any particular use, including any patent infringement arising therefrom, 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. Copy
3、right 2004 SAE International All rights reserved. No part of this 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 O
4、RDER: Tel: 877-606-7323 (inside USA and Canada) Tel: 724-776-4970 (outside USA) Fax: 724-776-0790 Email: custsvcsae.org SAE WEB ADDRESS: http:/www.sae.org Issued 1984-06 Revised 2004-11 Superseding J1393 FEB1999 and J819 NOV1995 J1393 REV. NOV2004 1. Scope This document supersedes SAE J819Engine Coo
5、ling System Field Test. The purpose of this SAE Recommended Practice is to establish a testing procedure to determine the performance capability of the engine cooling systems, including charge air coolers on heavy-duty vehicles with liquid-cooled internal combustion engines. The definition of heavy
6、vehicles for this document includes, but is not limited to, on and off highway trucks, cranes, drill rigs, construction, forestry and agricultural machines. Vehicles equipped with side or rear-mounted radiators may require an alternate procedure of a towing dynamometer because of peculiar aerodynami
7、cs. Testing is generally conducted to determine compliance with cooling criteria established by the engine manufacturer or the end product user to meet a desired engine reliability goal. 2. References 2.1 Applicable Publication The following publication forms a part of the specification to the exten
8、t specified herein. Unless otherwise indicated the latest version of SAE publication shall apply 2.1.1 SAE PUBLICATION Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001. SAE J2676Transit Bus Cooling Systems Performance Testing (This document is in the process of being written and
9、 has not been published yet.) SAE J1393 Revised NOV2004 - 2 - 3. Definitions 3.1 Ambient Air Temperature For lab conditions, the ambient air temperature should be measured at a specified distance, at least 2 meters away from the vehicle being tested, in front of the cooling system inlet grille or sc
10、reens and reported. For field conditions, the ambient should be measured near the test vehicle and its location relative to the test vehicle should be recorded. 3.2 EOTDEngine Outlet Temperature Differential The difference between the coolant temperature at the engine outlet and the ambient air temp
11、erature. 3.3 Terms Used by the Industry Related to EOTD 3.3.1 AIR-TO-BOIL (ATB) The ambient temperature at which the engine coolant outlet temperature reaches 100 C (212 F), the boiling point of water at standard conditions. 3.3.1.1 ATB = 100 C engine coolant outlet temperature + ambient air tempera
12、ture. 3.3.2 AMBIENT CAPABILITY Similar to ATB, but refers to a coolant temperature other than the boiling point of water. 3.3.3 AIR-TO-REDLINE (ATR) The ambient temperature at which the engine coolant outlet temperature reaches the coolant overheat warning temperature. 3.3.3.1 ATR = Coolant overheat
13、 activation temperature engine coolant outlet temperature + ambient air temperature. 3.3.4 LIMITING AMBIENT TEMPERATURE (LAT) The ambient temperature at which the engine coolant outlet Temperature reaches the maximum allowable temperature. 3.3.4.1 LAT = Maximum engine coolant outlet temperature engi
14、ne coolant outlet temperature + ambient air temperature. 3.3.5 AMBIENT DESIGN TEMPERATURE (ADT) The ambient temperature at which the engine coolant outlet temperature reaches the design coolant temperature. 3.3.5.1 ADT = Design coolant temperature engine coolant outlet temperature + ambient air temp
15、erature. SAE J1393 Revised NOV2004 - 3 - 3.3.6 TOP TANK TEMPERATURE DIFFERENTIAL (TTTD, ALSO KNOWN AS TOP TANK DIFFERENTIAL, TTD) The difference between the coolant temperature at the radiator top tank and ambient air temperature. For a cross flow radiator, this would be the difference between the r
16、adiator inlet temperature and ambient air temperature. 3.3.7 AIR-TO-WATER (ATW) The temperature differential between ambient air and engine outlet. The terminology assumes water as the coolant. 3.3.8 INTAKE MANIFOLD TEMPERATURE DIFFERENTIAL (IMTD) The difference between the temperature of the air in
17、 the intake manifold and the ambient air. 3.3.9 CAC OUTLET TO AMBIENT The difference between the charge air cooler outlet temperature and the ambient temperature. 3.3.10 INSTALLED CHARGE AIR COOLING SYSTEM EFFECTIVENESS The effectiveness of the CAC system using the temperatures at the turbocharger o
18、utlet and intake manifold inlet rather than the temperatures at the CAC inlet and CAC outlet. See 3.3.10.1. 3.3.10.1 CAC System Effectiveness = (Turbocharger outlet temperature Intake manifold temperature)/ (Turbocharger outlet temperature-Ambient air temperature) 4. Facility Requirements 4.1 Labora
19、tory facilities should include the following: 4.1.1 POWER ABSORBING DEVICE A chassis or drivetrain dynamometer capable of absorbing rated horsepower and peak torque of the engine/vehicle. 4.1.2 COOLING AIR Constant air velocity and air temperature to the face of the radiator within the range recomme
20、nded by the engine manufacturer. 4.1.3 INSTRUMENTATION Ability to measure the required test data and test conditions. If the use of a controlled laboratory is not feasible, the test vehicle should be evaluated in a test course that is representative of typical field operating conditions that imposes
21、 worst case customer attainable and maintainable vehicle loading. Instrumentation similar to that used in the laboratory is still required. SAE J1393 Revised NOV2004 - 4 - 5. Test Preparation and Set Up 5.1 Engine and Vehicle 5.1.1 It is preferable to perform tests at ambient air temperatures betwee
22、n 27 C (81 F) and 46 C (115 F). Avoid performing cooling tests if the ambient air temperature is below 18 C (65 F). This will minimize the effects of changes in air density. 5.1.2 For field tests of off highway vehicles, it is preferable to test at wind speeds below 10 km/h (6 mph) unless wind is 90
23、 degrees to the test course. 5.1.3 Prior to start of the test, the machine shall be inspected to assure that: 5.1.3.1 It is serviced as specified by manufacturer. 5.1.3.2 It delivers specified power. This can be checked by monitoring fuel consumption, turbocharger outlet temperature and pressure or
24、application of the Drawbar Test Procedure for Construction, Forestry, and Industrial Machines, or other suitable means. 5.1.3.3 All items directly related to the cooling system performance, such as: fan speed, fan belt adjustment, fan to core spacing, air recirculation baffling or air recirculation
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