1、 WORLDWIDE ENGINEERING STANDARDS General Specification GMW14788 Internally Controlled Variable Displacement Piston AC Compressor Copyright 2012 General Motors Company All Rights Reserved May 2012 Originating Department: North American Engineering Standards Page 1 of 25 1 Introduction Note: Nothing i
2、n this standard supercedes applicable laws and regulations. Note: In the event of conflict between the English and domestic language, the English language shall take precedence. Note: Unless otherwise stated as gage (G), pressures listed within the specification are absolute. 1.1 Scope. This specifi
3、cation establishes the minimum requirements for the air conditioning compressor to be used with refrigerant R134a. The functions, performance, reliability, and validation required of any compressor are defined in this document. This specification is for internally controlled variable capacity compre
4、ssors. All requirements of this specification must be met in order to demonstrate design and production validation. 1.2 Mission/Theme. The compressor assembly accepts low pressure, low temperature refrigerant at an inlet port, compresses this refrigerant by a variety of mechanisms, and exhausts a hi
5、gh temperature, high pressure refrigerant at an outlet port. Power to drive the compressor is supplied by a separate power source, such as the vehicle power plant. The compressor assembly must conform to all requirements in this specification, as well as, the approved engineering drawings. 1.3 Class
6、ification. Not applicable. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. ANSI S12.54 ISO 3744 JIS Z8733 ANSI S12.55 ISO 3745 SAE J639 ASTM D1474-98 JIS Z8732 SAE/USCAR-2 2.2 GM Standards/Specifications. GMW3059
7、 GMW3191 GMW14477 GMW15760 GMW3097 GMW8758 GMW14483 GMW15862 GMW3103 GMW14156 GMW14872 GMW16044 GMW3116 GMW14157 GMW15272 GMW16241 GMW3172 GMW14264 GMW15758 GMW16290 2.3 Additional References. 9986181 52457600 Shipping Cap 52465700 Shipping Cap 52477000 Drawing CG2052 GM1829 GM Best Practice HVACPTC
8、-122 GM Best Practice HVACPTC-125 Note: The supplier shall work with the GM Design Release Engineer to comprehend these requirements. GM Part Number 12348526 Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitte
9、d without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW14788 Copyright 2012 General Motors Company All Rights Reserved May 2012 Page 2 of 25 GM Part Number 13505427 Statement of Requirements (SOR) Appendix B, Appendix C2, and Appendix G2 Subsystem Technical Specification (SSTS) Tyco El
10、ectronics 1-1703498-3 Tyco Electronics 963142-2 Tyco Electronics 967067-1 Tyco Electronics 1718760-3 Tyco Electronics 1718762-3 Vehicle Technical Specification (VTS) 3 Requirements 3.1 System/Subsystem/Component/Part Definition. 3.1.1 Appearance. 3.1.1.1 Color and Finish. Typical appearance is compr
11、essor body with a natural aluminum finish and the clutch with a low gloss black finish to match with other underhood components. Deviations from this are permissible, but must be approved by the releasing GM engineering group. 3.1.2 Content. The following paragraphs specify the requirements for the
12、physical and functional content of the Air Conditioning (A/C) compressor. 3.1.2.1 Physical Content. The physical content of the compressor includes the following: Inlet Port (Suction) Outlet Port (Discharge) Clutch/Pulley/Thermal Fuse Mounting Provisions High Pressure Relief Device Electrical Connec
13、tor for Clutch High Temperature Cut-out Switch (optional) High Pressure Cut-out Switch (optional) High Side Low-pressure Switch (optional) Shipping Caps Lubricant Control Valve Device 3.1.2.2 Functional Content. The A/C compressor is to provide the following functions: 3.1.2.2.1 The compressor circu
14、lates refrigerant in the A/C system. 3.1.2.2.2 The compressor affects pressure out of the evaporator. 3.1.2.2.3 The compressor provides high pressure and high temperature gas to the condenser. 3.1.2.2.4 High Pressure Relief Valve (HPRV). The compressor shall provide provisions for a high pressure re
15、lief device that complies with SAE J639. 3.1.2.2.4.1 High Pressure Relief Valve Location. The pressure relief valve design and location must follow GM Best Practice HVACPTC-125: Location of the compressor high pressure relief valve. 3.1.2.2.5 Control Valve. The control valve controls compressor disp
16、lacement to meet system needs. 3.1.3 Ambient Environment. The electrical components contained on the A/C compressor shall be able to withstand ambient air temperatures from -40 C to +125 C, with intermittent temperature requirements of +150 C for up to one hour of run time. The A/C compressor shall
17、be able to withstand humidity of up to 100% within a 25 mm envelope around the compressor body and clutch without damage to function or appearance. As required, part or all, of the compressor may be used as a fixture device for component testing. Test according to GMW3172 with mounting location at t
18、he engine with high temperature load. Electrical Load Code Letter C Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW14788 Copyright 2012
19、General Motors Company All Rights Reserved May 2012 Page 3 of 25 Mechanical Load Code Letter A Operating Temperature Code Letter H Climatic Loads Code Letter B Chemical Loads Code Letter E Dust and Water Protection IP6K8 3.1.4 Interfaces. Not applicable. 3.1.5 Usage Definition. Not applicable. 3.2 P
20、roduct Characteristics. 3.2.1 Performance Requirements. The paragraphs in this section specify the functional requirements for the A/C compressor. Data shall be submitted on compressors run sequentially through these performance tests for validation purposes at each stage of development. 3.2.1.1 Int
21、ernal Variable Value Performance Tests. 3.2.1.1.1 Minimum Capacity and Coefficient of Performance (COP). Minimum requirements are defined in Table 1. Variation in random samples taken from production shall not exceed 10% total. Coefficient of Performance is defined as the capacity divided by the mec
22、hanical power consumption. Table 1: Minimum Capacity and COP Requirements Note Suction Pressure Discharge Pressure Capacity Type A1 Capacity Type A2 Capacity Type B COP Type A1 COP Type A2 COP Type B rpm kPa kPa kW kW kW Idle Capacity 1200 500 2000 4.2 5.6 6.6 2.5 2.3 2.1 Stable Capacity 2100 280 16
23、00 5.3 6.6 7.9 2.2 2.0 1.8 Note: Compressor Capacity Type (A1, A2, B) clarification for a given compressor is to be found in Appendix C2 (CTS exceptions document) or Appendix B (General Program Description) of the SOR, and is to be later documented in the drawing/Unigraphics (UG) information. 3.2.1.
24、1.2 Maximum and Minimum Speed Definition. 3.2.1.1.2.1 Maximum Continuous RPM. Maximum continuous speed is defined per the durability test specification at condition 10 of Table A1 in Appendix A. The compressor must run a minimum of 10 h at this condition at 8500 rpm (all compressor types). 3.2.1.1.2
25、.2 Maximum Excursion RPM. Maximum excursion speed is defined per the durability test specification at condition 11 of Table A1 in Appendix A. The compressor must run a minimum of 10 minutes at this condition at 10 500 rpm (all compressor types). 3.2.1.1.2.3 Minimum RPM. The compressor shall be capab
26、le of running at a minimum speed of 575 compressor rpm. 3.2.1.1.2.4 Minimum Compressor Displacement. The minimum displacement of the compressor shall be 150 000 cycles at 5 Hz frequency with no appreciable loss of torque from the initial test conditions. M i g r a t i o n T e s t C y c l e D e p i c
27、 t i o n051015202530354045500 15 30 45 60 75 90 105 120 135 150 165T i m e (m i n u te s )Temperature(degC)Ev a p o ra t o r T e m p C o m p re s s o r/ C o n d e n s o r / T e m pCopyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction
28、or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW14788 Copyright 2012 General Motors Company All Rights Reserved May 2012 Page 21 of 25 4.3.1.2.13 Electrical Mechanical Durability Procedure. As required, part or all, of the compressor may be used as a fixtur
29、e device for component testing. Test according to GMW3172 with mounting location at the engine with high temperature load. Electrical load Code Letter C Mechanical load Code Letter A Operating Temperature Code Letter H Climatic loads Code Letter B Chemical loads Code Letter E Dust and Water Protecti
30、on IP6K8 4.3.1.2.14 Oil Drainage Capability. Take initial weight of both a production and service compressor. Drain through normal service procedure for five minutes. Re-weigh to confirm requirement is met for both compressors. 4.3.1.2.15 Mass Properties. For purposes of compliance to the mass requi
31、rement for the basic pump and clutch design, the compressor mounting arrangement will be assumed to be GMs large VDA design with a 110 mm diameter, six groove pulley regardless of the actual application. Each unique application is to be measured with the requirement being adjusted accordingly by the
32、 mass offset calculated using UG programs of the different pulley and casting combinations versus the described baseline. Requirement adjustment assumptions must be agreed to by the GM Validation Engineer. 5 Provisions for Shipping The compressor shall be compatible with commercial shipping by rail,
33、 truck or boat and include restraining provisions if necessary. Compressor degradation of appearance, performance, or durability due to shipping is not acceptable. Particular concerns are fluid leaks, fastener torque, chafing/abrasion of line/hoses and cracking or separations. 5.1 Assemblies shall b
34、e packaged free from dust and foreign objects. 5.2 A/C compressor assemblies shall be filled with lubricant below the point of leakage. The block fitting shall be covered with a shipping cap. Shipping caps for the part as delivered to the assembly plants must conform to 52465700 or 52457600. 6 Notes
35、 6.1 Glossary. Essential Tool: A tool called out in the manufacturers service manual diagnosis or repair procedure, which is required to perform that operation. MCON: A series of multiple contact electrical wiring terminals from Tyco Electronics. Slugging Event: A result occurring when the compresso
36、r has accumulated liquid refrigerant in the compressor to a point that is 100% of the liquid fill capacity of the compressor. 6.2 Acronyms, Abbreviations, and Symbols. 1D One-Dimensional A/C Air Conditioning ADV Analysis Development Validation ADVP&R Analysis Development Validation Plan and Report A
37、SHRAE American Society of Heating, Refrigerating and Air-Conditioning Engineers BFO BOM Family Owner BOM Bill of Materials CCA Customer Care and Aftersales (formerly Service Parts Operations (SPO) CCC Corporate Common Component COP Coefficient of Performance crpm Compressor RPM Copyright General Mot
38、ors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW14788 Copyright 2012 General Motors Company All Rights Reserved May 2012 Page 22 of 25 CUT Customer Usage Simu
39、lation Test dB Decibel DFMEA Design Failure Mode and Effects Analysis DRBTR Design Review Based on Test Results DV Design Validation EMC Electromagnetic Compatibility ESD Electrostatic Discharge FEA Finite Element Analysis FNA Functional Name Address G Gage (when used in conjunction with units of pr
40、essure) GPDS Global Product Description System He Helium HPRV High Pressure Relief Valve HVAC Heating Ventilation and Air Conditioning ICD Interface Control Document MAB Micro Autobox MATSPC GM Material Specification Database MY Model Year N Nitrogen N&V Noise and Vibration NVH Noise, Vibration, Har
41、shness OEM Original Equipment Manufacturer PAG Polyalkylene glycol Pd Discharge Pressure PID Proportional-Integral-Derivative PPAP Production Part Approval Process ppm parts per million PRV Pressure Relief Valve Ps Suction Pressure PTC Powertrain Cooling PUMA Product Usage, Measurements & Applicatio
42、n PV Product Validation Ra Surface Roughness REP Reliability Evaluation Point RFQ Request For Quote RH Relative Humidity rms Root Mean Squared RPP Reliability Program Plan Rt Maximum Roughness Height SH Superheat SMT Synchronous Management Team SOR Statement of Requirements SPL Sound Pressure Level
43、SSTS Subsystem Technical Specification TIR Total Indicated Runout Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW14788 Copyright 2012 Ge
44、neral Motors Company All Rights Reserved May 2012 Page 23 of 25 TPS Thermal Protection Switch TTF Test to Failure TXV Thermal Expansion Device U-CST Upper Critical Solution Temperature UG Unigraphics UPC Uniform Parts Classification VDA Verband der Automobilindustrie e. V., (a group representing the
45、 German automobile industry) VTS Vehicle Technical Specification 7 Additional Paragraphs 7.1 All parts or systems supplied to this standard must comply with the requirements of GMW3059, Restricted and Reportable Substances for Parts. 8 Coding System This standard shall be referenced in other documen
46、ts, drawings, etc., as follows: GMW14788 9 Release and Revisions This standard was originated in November 2005. It was first approved by the Global HVAC Compressor Subsystem Leadership Team in March 2006. It was first published in April 2006. Issue Publication Date Description (Organization) 1 APR 2
47、006 Initial publication. 2 MAY 2012 Minor updates in content with multiple paragraphs relocated to improve format. Additionally, removed eVDC content. (Compressor GSSLT) Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or network
48、ing permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW14788 Copyright 2012 General Motors Company All Rights Reserved May 2012 Page 24 of 25 Appendix A: Compressor Customers Usage Durability Specifications for Fixed Scroll Compressors Table A1: Durability Test Specificatio
49、n - Normal Operating Conditions Note: The total schedule is composed of 10 single cycles. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW14788 Copyright 2012 Ge
