《GMW-8771-2006.pdf》由会员分享,可在线阅读,更多相关《GMW-8771-2006.pdf(34页珍藏版)》请在三一文库上搜索。
1、 WORLDWIDE ENGINEERING STANDARDS General Specification Electrical/Electronic PPEI 3.7 GMW8771 Platform to Powertrain Electrical Interface (PPEI) Specification Air Conditioning Compressor Control Subsystem Copyright 2006 General Motors Corporation All Rights Reserved March 2006 Originating Department
2、: North American Engineering Standards Page 1 of 34 1 Introduction This section identifies the Air Conditioning Compressor Control electrical interface between Platform and Powertrain. 1.1 Applicability. The GMW8762 PPEI (Platform to Powertrain Electrical Interface) Standard Specification includes:
3、General Information, On-Board Diagnostics and Electrical Requirements and GMLAN Serial Data Signal Definitions and Framing for the following nineteen PPEI subsystems standard specifications: 1. GMW8763 Power and Ground 2. GMW8764 Four Wheel Drive/All Wheel Drive Controls 3. GMW8765 Displays and Gaug
4、es 4. GMW8766 Engine Power Management 5. GMW8767 Starter Control 6. GMW8768 Vehicle Theft Deterrent 7. GMW8769 Cruise Control 8. GMW8770 Cooling Fan Control 9. GMW8771 Air Conditioning Compressor Control 10. GMW8772 Serial Data Architecture 11. GMW8773 Brakes and Traction Control 12. GMW8774 Enhance
5、d Evaporative Emissions and Fuel 13. GMW8775 Exhaust After-Treatment 14. GMW8776 Suspension Control 15. GMW8777 Transmission 16. GMW8778 Generator Control 17. GMW8779 Post Collision Operation 18. GMW8780 Power Take-Off and Fast Idle Control 19. GMW8781 Vehicle Speed and Rough Road Sensing Each of th
6、e nineteen PPEI subsystem standard specifications contains the hardware, serial data, algorithms and calibrations for the named subsystem. The master PPEI document and all nineteen PPEI subsystem standard specifications are required to define the complete set of PPEI requirements. 2 References Note:
7、 Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. None. 2.2 GM Standards/Specifications. GMW3001 GMW8772 GMW3059 GMW8773 GMW8762 GMW8774 GMW8763 GMW8775 GMW8764 GMW8776 GMW8765 GMW8777 GMW8766 GMW8778 GMW8767 GMW8779 GMW8768 GMW8780
8、 GMW8769 GMW8781 GMW8770 2.3 Additional References. GMPT GMLAN Diagnostic Test Mode Configuration Specification. 3 Subsystem Requirements 3.1 Functional Overview. This section applies for all vehicles equipped with air conditioning. The ECM, on all HVAC systems, shall have primary responsibility for
9、 the HVAC compressor activation/de-activation on clutch based systems, or the permission to activate/de-activate on Electrically Controlled Variable Displacement (ECVD) systems. On clutch based A/C systems, the A/C relay is required by the ECM to control rapid vehicle acceleration and deceleration c
10、onditions, and to address OBD diagnostics situations. If an A/C compressor relay is required, the relay control GMW8771 GM WORLDWIDE ENGINEERING STANDARDS Copyright 2006 General Motors Corporation All Rights Reserved Page 2 of 34 March 2006 driver is provided by the ECM. In OBD II markets, the A/C C
11、ompressor Relay is always required. If the A/C compressor relay is not required, Powertrain provides permission via serial data to Platform to activate or request de-activation for normal operation, compressor protection and vehicle performance reasons. In ECVD systems, the compressor control driver
12、 is provided by the Platform HVAC controller. The HVAC controller has the responsibility for algorithms to control the compressor based on inputs from its own subsystem as well as inputs it receives from Powertrain over serial data. On all A/C systems, Powertrain has the primary responsibility for a
13、lgorithms to protect the compressor components based on inputs from its own subsystem as well as inputs it receives from Platform over serial data. 3.1.1 Platform Functions. Platform shall be responsible for executing the following portions of the air conditioning compressor control functions: a. On
14、 Electronically Controlled Variable Displacement (ECVD) applications, provide the stroke control output. b. Provide the electrical interface and process A/C information from any optional sensors necessary to support the HVAC algorithms. See Section 4.1.2. c. The HVAC subsystems may request an increa
15、sed engine idle speed from Powertrain via the GMLAN signal Platform Minimum Idle Boost Level Request to enhance/improve HVAC performance. Reference GMW8766 Engine Power Management Section 3.1.3 Platform Idle Boost Functional Requirements and Section 4.2 Platform Idle Boost Calibrations. (Platform Op
16、tional). d. Process non-emission related service tool requests for HVAC diagnostic information. See Section 4.1.2. e. Provide the A/C compressor control relay (if required). 3.1.2 Powertrain Functions. Powertrain shall be responsible for executing the following portions of the air conditioning compr
17、essor control functions: a. Control the compressor control relay (if present) for engine performance and emissions diagnostic purposes. b. Perform compressor minimum off timer if required. c. Activate the compressor control relay during crank, if required, in order to remove any liquid refrigerant (
18、slug) from the compressor based on engine coolant temperature and engine intake air temperature. See Section 4.1.3. d. Provide “engine off timer” function to support A/C slugging algorithm (if required). e. Process A/C refrigerant high side pressure transducer data and transmit via serial data to Pl
19、atform to support HVAC algorithms. See Section 4.1.3. f. On any kind of A/C system, manage the system protections. See Section 4.1.3. g. Provide an indication via serial data to Platform when the compressor is disabled by Powertrain for compressor protection or high coolant temperature. See GMW8765
20、Section 3 PPEI Displays and Gauges Subsystem Requirements and GMW8771 Section 4. 3.2 Hardware Overview. The only hardware interfaces required in this subsystem are the High Speed GMLAN and the (optional) Top of Travel Clutch switch input. The details for both these interfaces are described in other
21、parts of this document. 3.2.1 Block Diagram. The following block diagram (Figure 1) depicts a typical mechanization for a compressor. The electrical interface between Powertrain and Platform is the only standard defined. -,-,- GM WORLDWIDE ENGINEERING STANDARDS GMW8771 Copyright 2006 General Motors
22、Corporation All Rights Reserved March 2006 Page 3 of 34 3.2.1.1 Block Diagram Air Conditioning Compressor Control Figure 1: Air Conditioning Compressor Control Block Diagram Notes: (1) Compressor Control relay contacts are feed from either Battery or the HVAC Control Head. (2) A/C Compressor Control
23、 Relay is not required for ECVD applications in non-OBD II markets. (3) Alternatively a Clutch Pedal Position Sensor may provide this information. Reference GMW8777 for more details. POWERTRAINPLATFORM ECVD Control (1) Platform Electronics Powertrain Electronics Powertrain Compressor Control Algorit
24、hm Engine Speed PRNDL Intake Air Temperature A/C Compressor Over Temperature Sensor Outside Air Temperature Evaporative Temperature System Voltage ECVD Current Feedback Serial Data Link Coolant Temperature Platform Algorithm Top of Travel Clutch N/C Top of Travel Clutch Switch (Manual Trans Only) (3
25、) Run/Crank A/C Compressor Relay Control A/C Relay (2) To Clutch or ECVD solenoid Powertrain Relay High Side Fluid Pressure Sensor A/C High Side Pressure Supply A/C High Side Pressure A/C High Side Pressure Return Battery or PWM HVAC Driver (1) GMW8771 GM WORLDWIDE ENGINEERING STANDARDS Copyright 20
26、06 General Motors Corporation All Rights Reserved Page 4 of 34 March 2006 3.3 Interface Description. 3.3.1 Serial Data Link. Reference GMW8771 Section 4 and GMW8762 Section 4 PPEI Serial Data Signal and Definitions and Framing for definitions of signals listed below in Table 1. Table 1: Air Conditio
27、ning Compressor Control Serial Data Signals Signal Name Transmitter Notes Air Conditioning Compressor Command Powertrain Required Air Conditioning Compressor Failed On Platform Required (1) Air Conditioning Compressor Mode Request Platform Required Air Conditioning Compressor Normalized Load Platfor
28、m Required (1) Air Conditioning Compressor Normalized Load Validity Platform Required (1) Air Conditioning Compressor Normalized Load Gradient Allowed Powertrain Required (1) Air Conditioning Compressor System Virtual Device Availability Platform Required Air Conditioning Compressor Type Platform Re
29、quired Air Conditioning Off Indication On Powertrain Required Air Conditioning Refrigerant High Side Fluid Pressure Powertrain Required Air Conditioning Refrigerant High Side Fluid Pressure Validity Powertrain Required Engine Coolant Temperature Powertrain Required Engine Coolant Temperature Validit
30、y Powertrain Required Engine Intake Air Temperature Powertrain Required Engine Intake Air Temperature Validity Powertrain Required Engine Speed Powertrain Required Notes: 1. Signal is required for ECVD compressor system, but is not required for fixed displacement, Clutch based, or Hydraulically Cont
31、rolled Variable Displacement A/C compressor systems. 2. These signal names may change due to development work being done on ECVD systems for GMW8771 release. GM WORLDWIDE ENGINEERING STANDARDS GMW8771 Copyright 2006 General Motors Corporation All Rights Reserved March 2006 Page 5 of 34 3.3.2 Calibra
32、tions. The following Table 2 contains calibrations that cross the Platform Powertrain Electrical Interface (i.e., are located in devices on one side of the interface but controlled by the other side of the interface or driven by variation in the other side of the interface). Refer to Section 4 for d
33、etails. Table 2: Air Conditioning Compressor Control Calibration Table Calibration Name Location Owner K_AC_EngCoolTempDsnge Powertrain Platform K_AC_EngCoolTempEnge Powertrain Platform K_AC_PresSensor_Slope Powertrain Platform K_AC_PresSensor_Offset Powertrain Platform K_AC_VehicleSpeedThrsh Powert
34、rain Platform K_BarometerThreshold Powertrain Platform K_CompressorHiSpdDsblTme Powertrain Platform K_CompressorLoSpdDsblTme Powertrain Platform K_ContinuousGearDsngeOff Powertrain Platform K_ContinuousPN_Dsnge Powertrain Platform K_DiagClutchDelay_CatMon Platform Powertrain K_DiagOverrideOnMax_CatM
35、on Platform Powertrain K_DiagOverrideOnMax_EGR Platform Powertrain K_FullPedDsnge Powertrain Platform K_FullPedEnge Powertrain Platform K_HighPresDsnge Powertrain Platform K_HighPresEnge Powertrain Platform K_HighSpeedGearEngeOff Powertrain Platform K_HighSpeedPN_EngeOff Powertrain Platform K_HighVo
36、ltDsnge Powertrain Platform K_HighVoltEnge Powertrain Platform K_HiSpdFullPedDsnge Powertrain Platform K_HiSpdFullPedEnge Powertrain Platform K_LaunchPedPosDsnge Powertrain Platform K_LetOffPedDsblTme Powertrain Platform K_LowAccelDsnge Powertrain Platform K_LowAccelEnge Powertrain Platform K_LowPre
37、sDsnge Powertrain Platform K_LowPresEnge Powertrain Platform K_LowSpeedDsnge Powertrain Platform -,-,- GMW8771 GM WORLDWIDE ENGINEERING STANDARDS Copyright 2006 General Motors Corporation All Rights Reserved Page 6 of 34 March 2006 Calibration Name Location Owner K_LowSpeedEngeOff Powertrain Platfor
38、m K_LowVehSpdDsnge Powertrain Platform K_LowVehSpdEnge Powertrain Platform K_LowVoltDsnge Powertrain Platform K_LowVoltEnge Powertrain Platform K_MaxAntiSlugTme Powertrain Platform K_MaxFullPedDsblTme Powertrain Platform K_MinClutchDsblTme Powertrain Platform/Powertrain K_MinCompDsblTme Powertrain P
39、latform/Powertrain K_MinFullPedDsblCycTme Powertrain Platform/Powertrain K_MinFullPedDsblTme Powertrain Platform/Powertrain K_Sensor_Slope Powertrain Platform K_Sensor_Intercept Powertrain Platform K_Sensor_Pressure_Max Powertrain Platform K_ShutdownReqMax (1) Powertrain Platform/Powertrain K_SlugCo
40、olTempThrsh Platform Platform/Powertrain K_SlugIgnVoltThrsh Platform Powertrain/Platform K_SlugKoffMnfdTempThrsh Platform Platform/Powertrain K_SlugMaxRefPulses Powertrain Platform K_SlugMnfdTempThrsh Platform Platform/Powertrain K_SlugUnderPresLmt Platform Platform/Powertrain K_Torq_M_CltchlessAC_N
41、ormTrq Powertrain Platform K_TransientGearDsngeOff Powertrain Platform K_TransientPN_DsngeOff Powertrain Platform Note: (1) Calibration is not required for Clutch based A/C compressor control systems. GM WORLDWIDE ENGINEERING STANDARDS GMW8771 Copyright 2006 General Motors Corporation All Rights Res
42、erved March 2006 Page 7 of 34 3.3.3 Top of Travel Clutch. The Top of Travel Clutch switch and Clutch Pedal Position sensor are optional on manual transmission applications only. The switch or sensor is mandatory for all vehicles equipped with cruise control and also for all North American Applicatio
43、ns even if these applications are released in the non North American markets. However, the switch or sensor is optional for non North American applications not equipped with cruise control. 3.3.3.1 Top of Travel Clutch Switch This switch is a momentary contact normally closed switch to Run/Crank vol
44、tage. The Clutch switch opens when the operator depresses the clutch pedal. 3.3.3.2 Clutch Pedal Position (CPP) Sensor. A potentiometer provides an indication of the clutch pedal position. The ECM uses this input to determine the current pedal position relative to the total range of pedal travel ava
45、ilable on a vehicle. Reference GMW8777 Section 3.3.5 PPEI Transmission Subsystem Requirements. 3.3.4 A/C Compressor Relay Control. This signal is a discrete low side driver output from the Powertrain Electronics. The output shall be pulled low for compressor engagement on all vehicles with A/C compr
46、essor. This interface may be emission related. Refer to GMW8762 Section 1.4 PPEI On-Board Diagnostics Requirements for platform design guidelines. 3.3.5 A/C High-Side Pressure Supply. This regulated voltage is supplied by the Powertrain Electronics to the A/C High-Side Pressure Sensor. This may be a
47、 shared supply line with other devices. This interface may be emission related. Refer to GMW8762 Section 1.4 PPEI On-Board Diagnostics Requirements for platform design guidelines. 3.3.6 A/C High-Side Pressure. The Powertrain Electronics provides an analog input that reads the A/C High-Side pressure
48、sensor output. The sensor has a ratiometric output voltage that is proportional to pressure. This interface may be emission related. Refer to GMW8762 Section 1.4 PPEI On-Board Diagnostics Requirements for platform design guidelines. 3.3.7 A/C High-Side Pressure Return. This interface may be emission
49、 related. Refer to GMW8762 Section 1.4 PPEI On-Board Diagnostics Requirements for platform design guidelines. The Powertrain electronics shall provide the algorithm diagnostic to detect an “open” connection of the A/C High-Side Sensor Return hardwire signal. The sensor interface shall indicate a sensor voltage out of normal operating range when this condition exists. See Section 4 for algorithm requirements to disable the A/C compressor to protect compr
链接地址:https://www.31doc.com/p-3767413.html