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Prius PHV

Prius PHV. Air Conditioning. Toyota Motor Europe. Overview. : Available —: Not Available. Overview. : Available —: Not Available. Heat Pump System. Start. Goal. Heater ON. EV Driving. Plug-in Hybrid with Heat Pump System.

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Prius PHV

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  1. Prius PHV Air Conditioning Toyota Motor Europe

  2. Overview : Available —: Not Available

  3. Overview : Available —: Not Available

  4. Heat Pump System Start Goal Heater ON EV Driving Plug-in Hybrid with Heat Pump System The heat pump system (electric energy) is used when the engine is cold Engine is warmed-up only for the heating operation (It lowers fuel economy) EV Driving Plug-in Hybrid without Heat Pump System

  5. Heat Pump System • System Diagram Dehumidification Magnetic Valve High Pressure Magnetic Valve Heating 3-way Valve Accumulator Refrigerant Outlet Temp. Sensor Orifice A/C Pressure Sensor Heat Exchanger Shut Valve Engine Low Pressure Magnetic Valve H C M Condenser E C Refrigerant Inlet Temp. Sensor Heater Core Air Mix Damper Condenser Compressor with Motor ECS Evaporator Expansion Valve Electric Water Pump A/C Unit

  6. Heat Pump System • Parts location PTC Heater Condenser Heater Core ECS Evaporator Blower Motor A/C Unit (RHD Model)

  7. Heat Pump System • Parts location Refrigerant Outlet Temp. Sensor A/C Unit A/C Pressure Sensor Expansion Valve Compressor with Motor Dehumidification Magnetic Valve Heating 3-way Valve Accumulator Condenser High Pressure Magnetic Valve Low Pressure Magnetic Valve Heat Exchanger Shut Valve Refrigerant Inlet Temp. Sensor

  8. H C M E C Heat Pump System • Refrigerant line (All) H C M E C E: Evaporator C: Condenser H: Heater Core M: Compressor with Motor A Condenser A/C Unit View from A

  9. H C M E C Heat Pump System • Refrigerant line (1/3) H C M E C A/C Pressure Sensor E: Evaporator C: Condenser H: Heater Core M: Compressor with Motor Refrigerant Outlet Temp. Sensor Compressor with Motor Heating 3-way Valve

  10. H C M E C Heat Pump System • Refrigerant line (2/3) H C M E C E: Evaporator C: Condenser H: Heater Core M: Compressor with Motor Expansion Valve Heat Exchanger Shut Valve Dehumidification Magnetic Valve High Pressure Magnetic Valve

  11. H C M E C Heat Pump System • Refrigerant line (3/3) H C M E C E: Evaporator C: Condenser H: Heater Core M: Compressor with Motor Refrigerant Inlet Temp. Sensor Accumulator Low Pressure Magnetic Valve

  12. Heat Pump System • Cooler cycle Close Open OFF Open Close Engine H C M Cooled Air E C E: Evaporator C: Condenser H: Heater Core M: Compressor with Motor A/C Unit

  13. Heat Pump System • Heat Pump Cycle Close Close ON Open Open Warmed Air Engine H C M E C E: Evaporator C: Condenser H: Heater Core M: Compressor with Motor A/C Unit

  14. Heat Pump System • Heat Pump Cycle (With dehumidification) [A] Open Close ON Close Close Warmed and Dehumidified Air Engine H C M E C E: Evaporator C: Condenser H: Heater Core M: Compressor with Motor A/C Unit

  15. Heat Pump System • Heat Pump Cycle (With dehumidification) [B] Open Close ON Open Open Warmed and Dehumidified Air Engine H C M E C E: Evaporator C: Condenser H: Heater Core M: Compressor with Motor A/C Unit

  16. Heat Pump System • Heating operation by engine coolant Close Open OFF Open Close Warmed Air Engine H C M E C E: Evaporator C: Condenser H: Heater Core M: Compressor with Motor Electric Water Pump A/C Unit

  17. The heating performance by the current coolant temp. is lower than the target heating performance • The heating performance by the current coolant temp. is higher than the target heating performance • Front DEF switch is pressed (with windshield glass is easy to fog up) • Temp. setting is MAX HOT • Ambient temp. is approx. –2 °C (28.4 °F) or less • Frost is detected at the condenser (in the engine compartment) Heat Pump System • Heat Pump Operating Conditions Heat Pump Heat Pump Cycle • Windshield glass is hard to fog up • A/C switch indicator is turned off by pressing A/C switch Windshield glass is easy to fog up (with A/C switch indicator ON) Engine Coolant with Dehumidification Heat Pump Cycle (with Dehumidification) [A] 2.5 °C (36.5 °F) or more Less than 2.5 °C (36.5 °F) Evaporator temp. Heat Pump Cycle (with Dehumidification) [B]

  18. Heat Pump System • Automatic Defrosting Operation A/C Amplifier Refrigerant Inlet Temp. Sensor Signal Approx. –15 °C (5 °F) or less continues for 30 sec. Heat Pump Cycle Engine Start request Judges that the condenser (in the engine compartment) is frosted Warmed up Heating operation is changed from heat pump type to engine coolant type Changes to cooler cycle in order to defrost the condenser (for 20 min.) Required Flow Volume of the Electric Water Pump Cooler Cycle

  19. Heat Pump System • A/C switch indicator A/C Switch

  20. Heat Pump System • Humidity Sensor • Glass Humidity • Glass Temp. • Glass Surroundings Temp. A/C Amplifier Easiness of the windshield glass fog up Controls A/C system • Humidity Sensor • Glass Humidity Sensor • Glass Temp. Sensor • Glass Surroundings Temp. Sensor • Energy loss reduced • Prevents windshield glass from fogging up

  21. Heat Pump System • Humidity sensor controls Hard to fog up Easy to fog up FRE 100% Increase FER Air Keep REC/FRE ratio Increase REC Air FOOT/DFF Mode Normal Control +5 Blower Level +1 ±0

  22. Press and Hold Remote Air Conditioning System • Activation Electric power supplied through the plug-in function Major Difference From PRIUS

  23. Remote Air Conditioning System • System Diagram Battery Charger Battery Charger Inlet HV Battery (Sub 1, 2) Charger Relay High-voltage Wire Harness HV Battery (Main) Boost Converter (Sub) HV Battery Assembly • Power Switch • Shift Position Sensor • Stop Light Switch Boost Converter (Main) DC-DC Converter Inverter Assembly Compressor with Motor IG1, IG2 Relays Room Temp. Sensor Power Management Control ECU Ambient Temp. Sensor Door Control Receiver Certification ECU Power Management Bus V Bus No.1 Solar Sensor A/C Amplifier Main Body ECU Blower Motor Remote Air Conditioning Switch Servo Motors • Door Courtesy Light Switch • Door Lock Position Switch • Hood Courtesy Switch PTC Heater

  24. Remote Air Conditioning System • Operating Conditions Operation Start Condition • Press and hold the remote air conditioning switch for 0.8 sec or more when all the following conditions are satisfied • Power mode is OFF • Power switch is not pressed • Shift position is in P • All the doors are closed and locked • Engine hood is closed • Brake pedal is not depressed • Theft deterrent system is not in alarm state • While plug-in charging • Cooling or heating operating conditions meet the set temperature Operation Stop Condition [OR] • When the operation start condition are not met • Approx. 30 min. have elapsed • When the remote air conditioning switch is pressed twice within 3 sec.

  25. Remote Air Conditioning System • Operation Operation start conditions are satisfied A/C system operates in accordance with the set temp. Heating Operation Cooling Operation Ambient Temp. -2 °C (28.4 °F) or more Less than -2 °C (28.4 °F) PTC Heater Heat Pump (Heating Cycle) Maximally 3 PTC heaters (280 W x 3) are operated in accordance with the max. permissible power

  26. Air Conditioning System • Refrigerant PRIUS Plug-in: 670 g (23.6 oz.) PRIUS: 470 g (16.6 oz.) Standard Refrigerant Amount 100 g (3.53 oz.) High Pressure Overcharged +/- 50 g (+/- 1.76 oz.) Point where bubbles disappear Refrigerant Amount

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