Hybrid and EV Cooling Systems

Hybrid Cooling system components 0:00 Introduction 2:28 Crankshaft harmonic balancer 2:56 Electric engine water pump 3:24 Thermostat 4:19 Exhaust Gas Recirculation (EGR) System cooler 5:01 EGR Valve 5:36 Throttle valve heater 6:22 Engine coolant reservoir 6:26 Engine coolant reservoir air bleed plug 6:51 Inverter with converter coolant passage connections 7:35 P610 hybrid transaxle fluid heat exchanger 8:09 Electric Air Conditioning (A/C) compressor 8:39 A/C Condensor and receiver drier 8:53 Cylinder head coolant outlet fitting 9:09 Engine block coolant inlet fitting 10:24 Vehicle Approaching Speaker 12:38 Radiator grille shutter system 16:53 Close-coupled three-way catalytic converter 17:30 Second three-way catalytic converter 17:40 Exhaust heat recirculation system 17:45 Sub muffler 17:55 Exhaust heat recirculation system components and operation 21:30 Muffler and pressure valve 23:11 Two section radiator 24:00 Two drain plugs 24:30 6 hose fittings 26:18 Series-Parallel operation two-speed fans 27:30 Inverter electric water pump 28:39 Inverter coolant reservoir 29:22 Additional hose connections 31:28 Review of all radiator components and coolant paths 32:56 Three parallel engine coolant paths 34:06 Coolant refill and bleeding procedures 34:56 Recommended coolants 36:00 Video review Join us for hybrid and electric vehicle training with two online courses and in a 5-day on-campus boot camp with Professor John D. Kelly. See for more information. Hybrid and EV Cooling Systems Weber State University (WSU) - Department of Automotive Technology - Ardell Brown Technology Wing - Transmission Lab. This episode covers the engine, inverter, and transmission cooling systems found on most hybrid, plug-in hybrid, and electric vehicles. The cooling system covered in this video is from a 2017 Toyota Prius Eco, but the components and operation will be similar to any other hybrid or electric vehicle (minus the engine cooling) This video helps cover content related to the 2017 National Automotive Technicians Education Foundation (NATEF) Master Automobile Service Technology (MAST) Standard task “Identify service precautions related to service of the internal combustion engine of a hybrid vehicle.“ This topic is taught as part of our 4-year bachelor’s degree program. For more information on the Weber Automotive program, visit: This video was created and edited by Professor John D. Kelly at WSU. For a full biography, see Donate to the Department of Automotive Technology at Weber State University here: Questions: 1. How do you change the water pump drive belt? 2. Where is the engine thermostat located? 3. EGR valves have been used for years, why is the EGR valve in this video liquid cooled? 4. Why is the throttle valve heated? 5. What unique part is located on the engine coolant tank/reservoir? 6. How is the transaxle fluid-cooled? 7. What is unique about the A/C compressor shown in the video? 8. How many trouble codes can set for the radiator grille shutter system? 9. Describe the operation of the Exhaust Heat Recirculation System? 10. How many separate sections are in the radiator? 11. What is the purpose of the electric water pump at the bottom of the fan shroud? 12. Describe the three parallel coolant paths in the cooling system shown in the video: 13. What is the procedure to bleed air from the inverter coolant system? 14. What is the procedure to bleed air from the engine coolant system? 15. What coolant is recommended for the cooling systems on the vehicle in the video?