GMW-14782-2006.pdf
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1、 WORLDWIDE ENGINEERING STANDARDS Test Procedure HVAC ventilation, cold; heater cold; heater warm; defrost, warm; and defog (heater and defrost), warm. The characteristic curves thus obtained are necessary on the one hand for evaluating the air-side capacity of the module; on the other hand, they set
2、 the preconditions for evaluating the flow quality of the air ducts in the vehicle. 1.1.2 Air Flow of “Bare Modules” at a Specified Air Resistance. The air capacity of the module as a function of the terminal voltage shall be examined for all the air settings of paragraph 1.1.1. In order to simulate
3、 as closely as possible the situation in the vehicle, resistance shall be applied up-stream or downstream of the module, depending on the air ducts being tested (see VTS, SSTS, drawing or equivalent). 1.2 Foreword. Not applicable. 1.3 Applicability. All A/C and heater modules. 2 References Note: Onl
4、y the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. None 2.2 GM Standards/Specifications. GMW14780 2.3 Additional References. SSTS (Sub-System Technical Specification) VTS (Vehicle Technical Specification) 3 Resources 3.1 Facilities. See
5、details of test assembly and procedure for the specific system at the test location. 3.2 Equipment. See details of test assembly and procedure for the specific system at the test location. 3.3 Test Vehicle/Test Piece. A/C or heater module 3.4 Test Time. Not applicable. Calendar time: days Test hours
6、: hours Coordination hours hours 3.5 Test Required Information. Not applicable. 3.6 Personnel/Skills. Not applicable. 4 Procedure 4.1 Preparation. 4.1.1 Test Assembly. The test assembly must allow the air-side resistance outside the module to be varied. This can be achieved on the delivery or suctio
7、n side of the blower, e.g., by means of a slider. 4.1.1.1 The air-side resistance of the module shall not be influenced by the test assembly, i.e: The free space in front of the blower intake must permit air to be sucked in “from infinity”, i.e., there shall be areas in which the air speed is practi
8、cally zero. The air must be able to flow unhindered out of the module vents (“into infinity”). The air ducts shall not be modified in any way by add-on parts (e.g., blower speed recorder). 4.1.1.2 The moment of inertia and the balance of the impeller may only be slightly changed by the blower speed
9、recorder. GMW14782 GM WORLDWIDE ENGINEERING STANDARDS Copyright 2006 General Motors Corporation All Rights Reserved Page 2 of 3 March 2006 4.1.1.3 The blower voltage shall be measured directly at the motor terminals. 4.1.1.4 The module shall be mounted in vehicle installation position. 4.1.1.5 The r
10、ecirculating air flap shall be hermetically sealed. 4.1.1.6 The condensation drain shall be half closed. 4.1.1.7 The glove box cooler shall be closed. 4.1.1.8 In the event of unwanted air leakage (see paragraph 4.2.1), the module vents in question shall be sealed. 4.1.2 With the blowers switched off
11、, all instruments shall be calibrated to “0”. During this process, all pressure gauges to be used in the test shall be compared. 4.1.3 Further information; see details of test assembly and procedure for the specific system. 4.2 Conditions. 4.2.1 Environmental Conditions. During the development phase
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