Audi Q7 e-tron quattro 4M Training Manual
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Audi Q7 e-tron quattro 4M Training Manual

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Self Study Programme 649
For internal use only
Audi Q7 e-tron quattro
(type 4M)
Audi
Service Training

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Summary of Contents for Audi Q7 e-tron quattro 4M

  • Page 1 Self Study Programme 649 For internal use only Audi Q7 e-tron quattro (type 4M) Audi Service Training...
  • Page 2 < Back Forward > Ξ Contents Audi presents the Q7 e-tron quattro - its second model to feature a The standard MMI Navigation plus system, with Audi connect high-performance plug-in hybrid drive. The electric current pro- internet module, is integrated in tthe hybrid management system vided by the lithium-ion battery allows the large SUV to run for up on the Audi Q7 e-tron quattro.

  • Page 3: Table Of Contents

    ATF cooling _________________________________________________________________________________________________________________________________________________ 58 Function diagram, information and data exchange ____________________________________________________________________________________________________ 60 Functions influencing gearbox control (Audi drive select, e-tron modes) ____________________________________________________________________________ 61 Combinations of selector positions and e-tron modes within the Audi drive select modes ________________________________________________________ 63 Service _______________________________________________________________________________________________________________________________________________________ 64 Chassis Overall concept _____________________________________________________________________________________________________________________________________________ 66...

  • Page 4: Vehicle Distinguishing Features

    < Back Forward > Ξ Contents Introduction Vehicle distinguishing features e-tron logo on the design cover in the engine bay e-tron specific single-frame radiator grille in chrome/ matte black e-tron logo on the wing e-tron specific decorative grille in front bumper e-tron logo on the car key e-tron logo on the door sills 649_131...
  • Page 5 UX4 behind a flap diffusor without visible exhaust tail pipes e-tron alloy wheels In vehicle interior Dash panel insert of Audi virtual cockpit MMI system with e-tron displays with power meter and e-tron displays Switch for EV mode 649_022...

  • Page 6: Dimensions

    < Back Forward > Ξ Contents Dimensions 1219 1679 1690 1968 2212 649_053 649_054 2994 1082 5051 649_055...
  • Page 7 < Back Forward > Ξ Contents 2020 1179 649_056 Exterior dimensions and weights Inner dimensions and other specifications Length in mm Front headroom in mm 5051 1071 Width (not including exterior 1968 Front shoulder width in mm 1571 mirrors) in mm Rear headroom in mm 1016 Width (including exterior mirrors)

  • Page 8: Passive Safety

    Components Front side airbag Depending on country version and trim level, the passive occupant and pedestrian protection system in the Audi Q7 e-tron quattro may comprise the following components and systems: • Airbag control unit • Front inertia-reel seat belts with pyrotechnic belt tensioners • Adaptive driver airbag...
  • Page 9 < Back Forward > Ξ Contents Front side airbag Head airbag, Rear side airbag driver and front pass. side Rear side airbag 649_010 Note The diagrams in the chapter "Passive occupant safety" are schematic diagrams designed to aid understanding.

  • Page 10: System Overview

    < Back Forward > Ξ Contents System overview The system overview shows the components for all markets. Keep in mind that this constellation is not possible in a production model. 649_009...
  • Page 11 < Back Forward > Ξ Contents Additional equipment Equipment specifications may vary due to the different require- ments and statutory provisions which apply to vehicle manufactur- ers in the various markets. Key to figure on page 10: Driver side seat belt switch Seat belt warning system warning lamp Front pass.

  • Page 12: Airbag Control Unit J234

    An electric current of between approx. 1.75 A and 2 A is used for signal transmission. 649_013 Reference For more information about the hybrid battery, refer to Self Study Programme 650 "Audi Q7 e-tron quattro (type 4M) high- voltage system and vehicle electrics".
  • Page 13 ON signal ON signal OFF signal OFF signal Pulse width Pulse width Time (t) Time (t) 649_015 649_016 Reference For more information about online roadside assistance and the Audi emergency call, refer to Self Study Programme 647 "Audi A4 (type 8W) Infotainment and Audi connect".

  • Page 14: Internal Combustion Engines

    SCR coated diesel particulate filter 649_005 Reference For more information about the 3.0l V6 TDI engine and the SCR system, refer to Self Study Programmes 479 "Audi 3.0l V6 TDI engine (second generation)", 622 "Second-generation Audi clean diesel" and 632 "Audi Q7 (type 4M)".
  • Page 15 < Back Forward > Ξ Contents Specifications Torque/power curve of 3.0l V6 TDI engine CVZA Power output of internal combustion engine in kW Torque of internal combustion engine in Nm 649_118 The engine code is, as seen in the direction of travel, located at the front left below the cylinder head on the protruding edge of the Engine speed [rpm] engine block.

  • Page 16: Third-Generation 2.0L R4 Tfsi Engine (Ea888)

    FlexRay bus system 649_007 Reference For more information about the Gen. 3 2.0l TFSI engine, please refer to Self Study Programmes 606 "Audi 1.8 and 2.0l TFSI engines of EA888 series (third generation)" and 645 "Audi 2.0l TFSI engines of EA888 series".
  • Page 17 < Back Forward > Ξ Contents Specifications Torque/power curve of 2.0l TFSI engine CVJA Power output in kW Torque in Nm Engine speed [rpm] 649_119 649_003 Engine code on the engine block Features Specifications Engine code CVJA Type 4-cylinder inline engine Displacement in cm 1984 Stroke in mm...

  • Page 18: Technical Features

    Forward > Ξ Contents Technical features Active accelerator pedal The Audi Q7 e-tron quattro usually starts in electric-only mode. Accelerator pedal module GX2 with: • Active accelerator pedal control unit J1115 The driver's power requirement are indicated to the system via the • Accelerator pedal position sensor G79 active accelerator pedal.
  • Page 19 If the hybrid pedal, the drive system is activated. e-tron READY mode is dis- battery is not sufficiently charged, the internal combustion engine played in the Audi virtual cockpit. The vehicle uses the e-machine is started. sender control unit...
  • Page 20 Therefore the lower roll is pushed up by the pendulum bar and feeds the poly V-belt. 649_116 Reference For more information about the third-generation 2.0l TFSI engine, refer to Self Study Programme 650 "Audi Q7 e-tron quattro (type 4M) high-voltage system and vehicle electrics".
  • Page 21 The status of the fuel filler flap is indicated in the dash panel insert. 649_057 Fuel filler flap release button E319 Note The diesel fuel tank in the Audi Q7 e-tron quattro with 3.0l V6 TDI engine has a capacity of 75 l and is a carryover from the conventional model.
  • Page 22 Counter-vibration is produced by the active engine mountings. Support bearing Power unit mounting actuator 2 G749 Power unit mounting actuator 2 N514 649_122 Reference For more information about the starter generator C29, refer to Self-Study Programme 650 "Audi Q7 e-tron quattro (type 4M) high-voltage system and vehicle electrics".
  • Page 23 This is done by slowly opening the exhaust flap thereby damping the muffled noise of the diesel engine. Electrically powered exhaust flap 649_109 Reference For more information about the exhaust flap with electric drive, refer to Self-Study Programme 607 "Audi 4.0l TFSI Engine with Biturbo Charging".

  • Page 24: Power Transmission

    < Back Forward > Ξ Contents Power transmission Overview 3.0l V6 TDI engine, Hybrid module with e-machine page 14 (three-phase AC drive VX54), page 30 8-speed automatic gearbox 0D7, page 36 Selector mechanism, page 26 Cooling the e-machine Separation clutch actuator V606, page 32 Hight-voltage lines for e-machine...
  • Page 25 Prop shaft, The prop shaft assembly procedure is identical to the standard procedure described in SSP 632 for the Audi Q7 (type 4M). The prop shaft of the Audi Q7 e-tron quattro is, however, shorter due to the size of the 0D7 gearbox. 649_058 Rear axle drive 0D2: unlocked differential, factory designation: HL 600 B...

  • Page 26: Selector Mechanism

    Cover for emergency release device of parking lock in front left footwell Reference For more information about the selector mechanism and operating concept of the Audi Q7 e-tron quattro, refer to Self Study Programme 632 "Audi Q7 (type 4M)", page 40 ff.

  • Page 27: Emergency Release, Parking Lock

    "Vehicle may roll away! P cannot be selected. Please apply parking brake." 649_063 Reference For more information about the parking lock emergency release device in the Audi Q7 e-tron quattro, refer to Self Study Programme 632 "Audi Q7 (type 4M)", page 48 ff.

  • Page 28: Plug-In Hybrid Drive

    < Back Forward > Ξ Contents Plug-in hybrid drive The internal combustion engine and the eight-speed automatic gearbox 0D7 with hybrid module are key components of the hybrid drive. Screw coupling position 1, Service port cover End plate of separation clutch K0 radial oblong hole Tangential oblong hole Torque converter...
  • Page 29 < Back Forward > Ξ Contents As has been the case since the launch of the Audi A5 (type 8T), the torsion damper transmission plate must be disconnected from the engine flywheel via the service port in order to remove the 0D7 gearbox. See SSP 392.

  • Page 30: Hybrid Module (Separation Clutch Actuator, Sensors)

    < Back Forward > Ξ Contents Hybrid module (separation clutch actuator, sensors) The hybrid module housing accommodates the front axle drive. In generator mode, the rotor of the e-machine is driven by the The torsion damper is on the internal combustion engine side and internal combustion engine or by the recuperation system via the the e-machine with separation clutch K0 is on the basic gearbox closed separation clutch K0.
  • Page 31 < Back Forward > Ξ Contents Stator with 24 coils, cooled, External rotor, Clutch plate of separa- End plate of separation clutch K0 with integrated clutch control 32 permanent magnets produce 16 pole pairs, tion clutch K0, mechanism, the diaphragm spring is integrated in the rotor page 32 page 32 together with the contact plate for separation...
  • Page 32 < Back Forward > Ξ Contents Actuation mechanism for separation clutch K0 – separation clutch actuator V606 The separation clutch K0 is a dry plate clutch and is engaged in the The separation clutch K0 is actuated by the separation clutch idle state.
  • Page 33 < Back Forward > Ξ Contents Actuation mechanism of separation clutch K0 The separation clutch actuator drives the worm gear shaft via the The separation clutch otherwise functions in the same way as a shaft slip-on coupling. The worm gear is connected to the spur convetional frictional clutch with diaphragm spring and contact gear drive of the adjusting ring.
  • Page 34 < Back Forward > Ξ Contents Drive motor rotor position sensor 1 G713 The drive motor rotor position sensor 1 G713 is seated in the The power electronics require this information to control the hybrid module housing and operates contactlessly. When the three-phase AC current in such a way that the rotor starts up in the vehicle is opened (wake-up), the electric drive power and control desired direction with minimum power consumption and...
  • Page 35 < Back Forward > Ξ Contents Drive motor temperature sensor G712 The drive motor temperature sensor G712 is seated between In this case, the e-machine operates neither as a motor nor as a 2 magnetic coils, in order to ensure better signal acquisition. It is generator.

  • Page 36: 8-Speed Automatic Gearbox 0D7 (Cutaway View, Atf And Mtf Systems, Atf Supply)

    Ξ Contents 8-speed automatic gearbox 0D7 (cutaway view, ATF and MTF systems, ATF supply) Specifications Development/manufacturer ZF Friedrichshafen AG Service designation Audi-internal designation AL552E-8Q Manufacturer's designation 8HP65APH Gearbox type Electrohydraulically controlled eight-speed planetary gearbox for all-wheel drive with torque converter and e-machine. It also functions as a generator. During engine operation it delivers a maximum power output of 94 kW.
  • Page 37 < Back Forward > Ξ Contents Force distribution Self-locking centre differential with 40:60 asymmetrical-dynamic torque split Front axle/rear axle Weight including oil and three-phase AC synchronous motor in kg Gear ratios 1st gear: 4.714; 2nd gear: 3.143; 3rd gear: 2.106; 4th gear: 1.667; 5th gear: 1.285;...
  • Page 38 < Back Forward > Ξ Contents Cutaway view Cutaway A-A Front right flange shaft Front axle drive Pinion Sealing ring, shaft to be replaced after dismantling the hybrid module Side shaft protection tube Side shaft Pressure equalisation element Separation clutch K0 Cutaway B - B E-machine, rotor Converter lockup clutch...
  • Page 39 < Back Forward > Ξ Contents Sectional view C-C Sealing ring, to be replaced after dismantling the hybrid module 649_112 Oil pump for transfer box Spur gear with beveloid gearing, and front axle drive front axle drive 649_075 Clutch E Primary drive Clutch C Parking lock gear...
  • Page 40 Forward > Ξ Contents Systems for ATF and gear oils, lubrication, sealing Two separate systems The 0D7 gearbox of the Audi Q7 e-tron quattro has two separate ATF system for the planetary gearbox and the hydraulic systems. control unit (lifetime)
  • Page 41 < Back Forward > Ξ Contents Combined gearbox ventilation When heating or cooling the gearbox, the pressure is equalised via Vent for transfer box and front axle drive the gearbox vent. Ventilation hose The front axle drive is vented into the transfer box via the side shaft protection tube.
  • Page 42 < Back Forward > Ξ Contents ATF supply The supply of ATF to the eight-speed automatic gearbox 0D7 is The mechanically driven ATF pump is driven by the e-machine and/ ensured by two pumps: a mechanically driven ATF pump and the or by the internal combustion engine via the converter housing.
  • Page 43 < Back Forward > Ξ Contents Auxiliary hydraulic pump 1 for gear oil V475 The auxiliary hydraulic pump V475 is capable of conveying ATF on Actuator diagnostics can be performed using the diagnostic tester. 3 output levels within an ATF temperature range from 0 °C to Basically, it is possible to update the pump software.

  • Page 44: Gearbox Schematic, Gear Set, Shift Elements

    < Back Forward > Ξ Contents Gearbox schematic, gear set, shift elements Torsion damper E-machine rotor Separation clutch K0 Converter lockup clutch, CLC Transmission plate Converter Separation clutch actuator E-machine stator Gearbox input shaft V606, page 32 ATF pump, mechanically driven Gearbox schematic Crankshaft of internal combustion engine Output shaft for primary drive...
  • Page 45 < Back Forward > Ξ Contents Start-up Gear set As is the case with a standard automatic gearbox, the torque The gear set is identical to that of the 0BK gearbox as described in converter is utilised for start-up. The torque output to the con- SSP 457 (page 26 ff.) The eight forward gears and reverse gear are verter lockup clutch by the e-machine or the internal combustion realised by linking four simple single-web planetary gear sets.

  • Page 46: Shift Matrix, Operating Modes, Mechatronic Module

    < Back Forward > Ξ Contents Shift matrix, operating modes, mechatronic module The shift elements (brakes and clutches) are controlled by means This means that actuation of the separation clutch is not depend- of actuators, pressure control valves and solenoid valve N88 of the ent of the ATF supply system pressure.
  • Page 47 Resistance at 20 °C in Ω (valve open) 23 – 27 Resistance at 20 °C in Ω 9 – 13 Reference For more information about the shift schematic, the valves and the mechatronic module, refer to Self Study Programmes 457 "Audi A8 ’10 Power Transmission" and 603 "Audi A6 Avant ’12".
  • Page 48 < Back Forward > Ξ Contents Operating modes Vehicle is ready for operation, selector position P or N The vehicle is ready for operation. This is indicated to the driver as A supply of ATF pressure is ensured. Selector position P or N is soon as "e-tron READY"...
  • Page 49 Traction is barely noticeable after selecting 1st gear in selector position D, because clutch C is open when neutral idle control is active and traction cannot be established until the brake has been released. Unlike the Audi Q7 (type 4M) powered exclusively by the internal combustion engine, neutral idle control is not implemented in R gear.
  • Page 50 S , the the torque generated by the e-machine is increased by the amount Audi drive select mode dynamic or by the hybrid management of torque required for starting after the separation clutch K0 system in dependence on the charge level of the hybrid battery closes.
  • Page 51 (Fig. 649_096). value. The maximum system torque is available at about 1250 rpm For example, the 3.0l V6 TDI engine in the Audi Q7 e-tron quattro or higher. delivers a maximum power output of 190 kW. It is capable of delivering up to 600 Nm of torque.
  • Page 52 < Back Forward > Ξ Contents Internal combustion engine idling, e-machine running in generator mode, selector in P or N Stationary charging Separation clutch K0 closed 649_097 Crankshaft of internal combustion engine Output shaft for primary drive Drive by internal combustion engine and e-machine running in generator mode 1st gear 649_098 Crankshaft of internal combustion engine...
  • Page 53 Vehicle settings • In selector position D, one of the Audi drive select modes • One of the e-tron modes EV, Hybrid or Battery Hold is selected. allroad, effiency, comfort or auto is selected.
  • Page 54 • Selector lever is engaged in S or braking effect of the internal combustion engine in overrun mode • Audi drive select mode dynamic is selected or is simulated. At the same time, the relevant gear is selected in the • The gearbox is in tiptronic mode, the driver can gradually...
  • Page 55 < Back Forward > Ξ Contents Brake energy recuperation 3rd gear 649_102 Crankshaft of internal combustion engine Output shaft for primary drive The gearbox schematic shows the power flow during brake energy The hybrid management system initiates the controlled conversion recuperation in 3rd gear.
  • Page 56 ATF temperatur sensor to vehicle slide valve G747 Note Protect the mechatronic module against electrostatic discharge. Please refer to the guidelines provided in SSP 284 "6-speed automatic gearbox 09E in the Audi A8 ’03 part 2", page 6, and in the Workshop Manual.
  • Page 57 < Back Forward > Ξ Contents The mechatronic module used in the 0D7 gearbox has a LIN bus The sensors, actuators and design configuration of the electrohy- line to auxiliary hydraulic pump 1 for gear oil V475, which replaces draulic parking lock, as well as the method of activation of the shift the control line for the hydraulic impulse storage system (HIS) as elements in the mechatronic module of the 0D7 gearbox, are used in the 0D5 gearbox or 0BK gearbox.

  • Page 58: Atf Cooling

    A gylcol test will show up even trace quantities of glycol and can, If the Audi Q7 e-tron quattro is equipped with a third-generation therefore, be used to rule out this cause. 2.0l R4 TFSI engine, the ATF cooler is flushed by the coolant run-on If the coolant lines have been disconnected in order to carry out pump V51.
  • Page 59 < Back Forward > Ξ Contents Coolant run-on pump V51 Discrete line from engine control unit J623, The coolant run-on pump V51 is used in combination with the with bidirectional PWM signal third-generation 2.0l R4 TFSI engine. The pump electronics are provided with a continuous supply of voltage via the 12-volt electrical system.

  • Page 60: Function Diagram, Information And Data Exchange

    < Back Forward > Ξ Contents Function diagram, information and data exchange Information and data exchange The control unit of the 0D7 gearbox communicates with the vehicle In addition to the usual information used by an automatic torque via FlexRay bus. Since the instructions for the separation clutch converter, the automatic gearbox control unit J217 requires actuator are decided by the engine control unit, a great deal less requires the following supplementary data for gearbox control...

  • Page 61: Functions Influencing Gearbox Control (Audi Drive Select, E-Tron Modes)

    Functions influencing gearbox control (Audi drive select, e-tron modes) Functions such as the Audi drive select modes, the e-tron modes In this case, the Audi drive select modes and the e-tron modes and downhill assist influence gearbox control. interact with selector positions D and S to generate defined combi- nations.
  • Page 62 < Back Forward > Ξ Contents e-tron modes e-tron modes EV, Hybrid and Battery Hold can be freely selected one after the other in a loop using the electric drive button E656 (EV button) or using the rotary pushbutton of the MMI. The e-tron Modi are adapted to meet country-specific legislation and customer requirements.

  • Page 63: Combinations Of Selector Positions And E-Tron Modes Within The Audi Drive Select Modes

    Audi drive select, the last combination of selector position and e-tron mode is restored, provided that the e-tron mode has not been changed in the interim. Moving the selector from D to M or from S to M and back does not change the modes of Audi Drive select or the e-tron drive.

  • Page 64: Service

    Using the diagnostic tester The diagnostic functions of address codes 02 – Gearbox electron- ics, 01 – Engine electronics and 81 – Selector lever are available for power transmission in the Audi Q7 e-tron quattro. Address code 02 Gearbox electronics The electrical components and control operations of the 0D7 results queried via the address code 02 – Gearbox electronics.
  • Page 65 < Back Forward > Ξ Contents Address code 01 Engine electronics Address code 81 Selector lever The following components related to power transmission can be The electrical components of the selector lever (refer to page 26) assessed on the basis of measurement data, event memory entries are diagnosed.

  • Page 66: Chassis

    VX70 (refer to page 69) Audi Q7 (type 4M) Audi Q7 (type 4M) Reference For detailed information about the chassis system of the Audi Q7 (type 4M), refer to Self Study Programmes 632 "Audi Q7 (type 4M)" and 633 "Audi Q7 (type 4M) Chassis".
  • Page 67 (for adaptive air suspension) • Adopted from Audi Q7 (type 4M) • Installation location: under the centre console 649_139 Only chassis systems with a quattro drivetrain are used for the Audi Q7 e-tron quattro. The following chassis versions are available: Suspension variants Features Standard suspension (1BA) The standard suspension as basic equipment features steel springs and non-adaptive air suspension.

  • Page 68: Brake System

    Forward > Ξ Contents Brake system The Audi Q7 e-tron quattro is equipped with a generously dimen- The electrical parking brake (EPB) is a carryover from the sioned brake system which offers a high performance reserve in all Audi Q7 (type 4M). The foot controls and the brake servo are new driving situations.

  • Page 69: Electro-Mechanical Brake Servo

    < Back Forward > Ξ Contents Electro-mechanical brake servo Even in electric-only mode, it is necessary to boost brake pressure The electro-mechanical brake servo offers the following key advan- when braking is applied by the driver. The intake manifold vacuum tages over a conventional pneumatic brake servo: of the internal combustion engine cannot be utilised, because it is only available during conventional vehicle operation.
  • Page 70 < Back Forward > Ξ Contents Design and functional principle Piston rod Engine-gearbox unit Upper pinion shaft Booster sleeve Push rod (brake pedal connection) Brake pedal position sender G100 649_145 Tandem master brake cylinder Brake servo control unit Lower pinion shaft J539 The brake pressure applied by the driver is boosted by the engine- The sliding assembly of the booster sleeve on the push rod, and...

  • Page 71: Brake System Pressure Accumulator Vx70

    < Back Forward > Ξ Contents Brake system pressure accumulator VX70 If required, the electric drive/AC motor is utilised as a generator in Hydraulic brake pressure is reduced during recuperation, as this is overrun mode to recharge the hybrid battery (recuperation). The more efficient.
  • Page 72 Reference For more information about the brake system pressure accumulator VX70, refer to Self Study Programme 627 "Audi A3 Sportback e-tron (type 8V)".

  • Page 73: Wheels And Tyres

    Tyre pressure monitoring system The established second-generation low tyre pressure indicator is As previously for the Audi Q7 (type 4M), a third-generation direct also offered as basic equipment for the Audi Q7 e-tron quattro. tyre pressure monitoring system is optional. For detailed informa- tion, refer to Self Study Programme 633 "Audi Q7 (type 4M)

  • Page 74: Air Conditioning And Cooling

    Forward > Ξ Contents Air conditioning and cooling Thermal management and heat pump The thermal management system in the Audi Q7 e-tron quattro circuit for the air conditioning systenm and the requisite control- ensures an optimal engine temperature in all operating states, lers.
  • Page 75 < Back Forward > Ξ Contents Coolant High-voltage battery charger 1 switching valve 4 N635 Hybrid battery unit High-voltage battery charger control unit J1050 Electric drive power and control electronics Coolant shutoff valve 2 N645 649_019...
  • Page 76 The heat pump system has been used in building installations for components to be used for heating the cabin. Waste heat can be years, and now finds its way into the world of Audi automobiles recovered for heating purposes by extending the refrigerant and through the Audi Q7 e-tron quattro.
  • Page 77 The high-voltage heater (PTC) Z115 is used when the heating High-voltage cable output of the heat pump is not sufficient to heat the cabin. connection Coolant connections 649_032 Reference For further information about the high-voltage heater (PTC) Z115, refer to Self Study Programme 650 "Audi Q7 e-tron quattro (type 4M) high-voltage system and vehicle electrics".
  • Page 78 The electrical AC compressor V470 is the core element of the Type Scroll compressor vehicle air conditioning system and has been redeveloped for use in the Audi Q7 e-tron quattro. The electrical AC compressor draws in Compression volume 33 cm the cold, gaseous refrigerant at low pressure. The refrigerant is compressed inside the compressor, increasing the pressure.
  • Page 79 < Back Forward > Ξ Contents Hybrid battery heat exchanger (chiller) Coolant connections Refrigerant connections The hybrid battery heat exchanger is a plate heat exchanger within which the refrigerant evaporates. The component is used for cooling the battery circuit and for extracting heat from the low- temperature circuit during heat pump operation.
  • Page 80 The refrigerant circuit of the Audi Q7 e-tron quattro differs from The two refrigerant circuit service connections (high and low that of the Audi A3 e-tron in that it includes additional compo- pressure) are located upstream of the AC compressor on the nents for the heat pump.
  • Page 81 < Back Forward > Ξ Contents System overview of the refrigerant circuit in heat pump mode N636 V424 G395 G826 G827 V470 N641 N640 N643 N642 649_017 Key: Refrigerant under low pressure Refrigerant under high pressure Liquid container with dryer High-pressure sensor Coolant condenser G395 Refrigerant pressure and temperature sensor...

  • Page 82: Coolant Circuits

    Forward > Ξ Contents Coolant circuits In addition to the refrigerant circuit, the Audi Q7 e-tron quattro module JX1 are also cooled via this circuit. The temperature of the has high- and low-temperature circuits. They are needed to meet components is controlled via valve circuits. The hybrid battery can...
  • Page 83 < Back Forward > Ξ Contents System overview of the cabin heating circuit G905 N634 G902 V590 N635 V617 G968 G908 V618 Z115 G837 G904 G906 VX54 V620 N633 G907 N645 N632 649_023 Component of the pipe assembly Key: Cooled coolant G905 Coolant temperature sensor 4 for thermal management Heated coolant G906 Coolant temperature sensor 5 for thermal management...
  • Page 84 < Back Forward > Ξ Contents Coolant circuit for the high-voltage system The coolant circuit for the high-voltage system cools the following The low-temperature cooler is seated between the main radiator components: and the condenser. • Three-phase AC drive VX54 • Electric drive power and control electronics module JX1 The switching positions of coolant switching valve 1 N632 and • Hybrid battery unit AX1...
  • Page 85 < Back Forward > Ξ Contents System overview of the coolant circuit for the high-voltage system G905 N634 G902 V590 N635 V617 G908 G968 V618 Z115 G837 G904 G906 VX54 V620 N633 G907 N645 N632 649_018 Component of the pipe assembly Key: Cooled coolant G905 Coolant temperature sensor 4 for thermal management...
  • Page 86 < Back Forward > Ξ Contents Coolant circuit for the electric driveline This coolant circuit regulates the temperature of the electric drive temperature, necessitating a separate cooling circuit. The low- power and control electronics module JX1 as well as the three- temperature cooler is positioned fore of the main radiator.
  • Page 87 < Back Forward > Ξ Contents System overview of the coolant circuit for the electric driveline G905 N634 G902 V590 N635 V617 G908 G968 V618 Z115 G837 G904 G906 VX54 V620 N633 G907 N645 649_113 Component of the pipe assembly N632 Key: Cooled coolant...
  • Page 88 < Back Forward > Ξ Contents Hybrid battery coolant circuit The coolant circuit for the hybrid battery regulates the tempera- ture of the hybrid battery unit AX1 and the high-voltage battery High-voltage battery charger 1 Hybrid battery unit charger 1 AX4. It comprises the hybrid battery heat exchanger, also known as the chiller (refrigerant-coolant heat exchanger), which allows active cooling of the hybrid battery unit AX1 through the refrigerant...
  • Page 89 < Back Forward > Ξ Contents System overview of the hybrid battery coolant circuit G905 N634 G902 V590 N635 V617 G968 G908 V618 Z115 G837 G904 G906 VX54 V620 N633 G907 N645 649_024 Component of the pipe assembly N632 Key: Cooled coolant G905 Coolant temperature sensor 4 for thermal management Heated coolant...

  • Page 90: Operating States Of The Heat Pump

    < Back Forward > Ξ Contents Operating states of the heat pump The three operating states of the heat pump are heating mode, cooling mode and reheat mode for air dehumidification. Heating mode To heat the cabin, the electrical AC compressor V470 compresses quently evaporates in the hybrid battery heat exchanger.
  • Page 91 < Back Forward > Ξ Contents Cooling mode The hot, gaseous refrigerant is not liquefied in the heat exchanger It is expanded via the expansion valve and evaporates in the air like in heating mode, but rather in the large condenser in the front conditioner's evaporator thereby cooling the cabin.
  • Page 92 < Back Forward > Ξ Contents Reheat mode In Reheat mode the air is initially cooled and dehumidified, and is If required, the system can also access the waste heat from the subsequently reheated. The heat exchanger for heat pump opera- electric driveline via the heat exchanger for the hybrid battery.

  • Page 93: Air Conditioning The Vehicle Interior

    The AC control panels in the Audi Q7 e-tron quattro are already The air conditioning system has a rear air distributor housing and a known from the Audi Q7 (type 4M). The front AC control panel, rear air conditioner/Climatronic operating and display unit E265. also known as the air conditioner/Climatronic operating and...

  • Page 94: System Overview

    < Back Forward > Ξ Contents System overview Thermal management Low coolant level indicator sensor 2 G837 Coolant temperature sensor 1 for thermal management G902 Coolant temperature sensor 3 for thermal management G904 Coolant temperature sensor 4 for thermal management G905 Electric drive control unit J841...
  • Page 95 < Back Forward > Ξ Contents High-voltage battery coolant pump V590 Battery regulation Coolant pump 4 for thermal management V620 control unit J840 Coolant pump for thermal management V617 Coolant pump 2 for thermal management V618 Coolant pump 3 for thermal management V619 Refrigerant shutoff valve V424 Coolant shutoff valve 2 N645 High-voltage...

  • Page 96: Infotainment

    For more information about the infotainment system, refer to Self Study Programme 637 "Audi Q7 (type 4M) occupant pro- tection and infotainment". For more information about wireless charging and Audi connect emergency call and service, refer to Self Study Pro- gramme 647 "Audi A4 (type 8W) Infotainment and Audi connect".

  • Page 97: Service

    < Back Forward > Ξ Contents Service Inspection and maintenance The following service intervals are displayed: • Oil change service • Mileage-based service events • Time-based service events Example of a service interval display Handbook Service intervals Flexible service event Next oil change: -- / -- Next inspection:...
  • Page 98 < Back Forward > Ξ Contents Overview of maintenance intervals for vehicles in the USA The Audi Q7 e-tron is subject to fixed inspection and maintenance intervals in the US market. 10,000 miles / 20,000 miles / 30,000 miles / 40,000 miles / 50,000 miles /...

  • Page 99: Appendix

    Ξ Contents Appendix Self study programmes For more information about the technology of the Audi Q7 e-tron quattro, please refer to the following self study programmes: SSP 479 The Audi 3.0l V6 TDI engine SSP 607 Audi 4.0l V8 TFSI Engine...
  • Page 100 Audi Vorsprung durch Technik All rights reserved. Technical specifications are subject to change. Copyright AUDI AG I/VK-35 service.training@audi.de AUDI AG D-85045 Ingolstadt Technical status 11/15...

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