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TECHNICAL SEMINAR ON HYBRID ELECTRIC VEHICLES PRESENTED BY:Sanjib ku.Dey Adm no:27I&E/2K

TECHNICAL SEMINAR ON HYBRID ELECTRIC VEHICLES PRESENTED BY:Sanjib ku.Dey Adm no:27I&E/2K. hev. HYBRID ELECTRIC VEHICLES. What Are HEVs?. HEVs combine the internal combustion engine of a conventional vehicle with the battery and electric motor of an electric vehicle. Why HEVs?.

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TECHNICAL SEMINAR ON HYBRID ELECTRIC VEHICLES PRESENTED BY:Sanjib ku.Dey Adm no:27I&E/2K

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  1. TECHNICAL SEMINARON HYBRID ELECTRIC VEHICLESPRESENTED BY:Sanjib ku.DeyAdm no:27I&E/2K

  2. hev HYBRID ELECTRIC VEHICLES

  3. What Are HEVs? HEVs combine the internal combustion engine of a conventional vehicle with the battery and electric motor of an electric vehicle.

  4. Why HEVs? Hybrid power systems were conceived as a way to compensate for the shortfall in battery technology. Because batteries could supply only enough energy for short trips, an onboard generator, powered by an internal combustion engine, could be installed and used for longer trips.

  5. HEVs Advantages • High fuel efficiency. • Decreased emissions. • No need of fossil fuels. • Less overall vehicle weight. • Regenerative braking can be used.

  6. Available HEVs • Toyota Prius • Honda Insight • Honda Civic(hybrid)

  7. HOW HEV WORKS 1.. INTERNAL COMBUSTION ENGINE 2..WHEEL 3.. ELECTRIC MOTOR 4..INTELLIGENT POWER ELECTRONICS 5.. BRAKE 6.. BATTERIES

  8. baseline hev design

  9. HEV Components Fuel tank Body chassis Energy management & system control Accessories Energy Storage unit Thermal Management system Hybrid Power unit Traction motor

  10. Body Chassis HEVs will contain a mix of aluminum, steel, plastic, magnesium, and composites (typically a strong, lightweight material composed of fibers in a binding matrix, such as fiberglass).

  11. ENERGY STORAGE SYSTEM HYBRID POWER UNIT VEHICLE PROPULSION SYSTEM HEVs combines ULTRA CAPACITORS SPARK IGNITION ENGINE ELECTRIC MOTOR BATTERIES CIDI ENGINE FUEL CELL FLY WHEEL GAS TURBINE

  12. ULTRA CAPACITORS Ultra capacitors are higher specific energy and power versions of electrolytic capacitors devices that store energy as an electrostatic charge. ENERGY STORAGE UNIT

  13. BATTERIES Lead acid batteries, used currently in many electric vehicles, are potentially usable in hybrid applications. Lead acid batteries can be designed to be high power and are inexpensive, safe, and reliable.

  14. FLY WHEEL Flywheels store kinetic energy within a rapidly spinning wheel-like rotor or disk. Ultimately, flywheels could store amounts of energy comparable to batteries. They contain no acids or other potentially hazardous materials. Flywheels are not affected by temperature extremes, as most batteries are. ENERGY STORAGE UNIT

  15. FUEL CELLS Fuel cells offer highly efficient and fuel-flexible power systems with low to zero emissions for future HEV designs. There are a variety of thermal issues to be addressed in the development and application of fuel cells for hybrid vehicles. HYBRID POWER UNIT

  16. SPARK IGNITION ENGINE Spark ignition engine mixes fuel and air in a pre-chamber. Throttle and heat losses, which occur as the fuel mixture travels from pre-chamber into the combustion chamber. HYBRID POWER UNIT

  17. CIDI ENGINE COMPRESSION IGNITION DIRECT INJECTION A Compression Ignition engine achieves combustion through compression without use of sparkplug. It becomes CIDI engine when it is enhanced with direct injection.

  18. vehicle propulsion system

  19. vehicle propulsion system

  20. ELECTRIC MOTOR Motors are the "work horses" of HEV drive systems. In an HEV, an electric traction motor converts electrical energy from the energy storage unit to mechanical energy that drives the wheels of the vehicle. Unlike a traditional vehicle, where the engine must "ramp up" before full torque can be provided, an electric motor provides full torque at low speeds. This characteristic gives the vehicle excellent "off the line" acceleration.

  21. Fuel System As emissions standards tighten and exhaust control technologies improve, the issue of evaporative emissions becomes increasingly important. Thermal management of fuel tanks is one approach to reducing these emissions. THERMAL MANAGEMENT

  22. Exhaust Systems 60% to 80% of amiss ions in an autos typical driving cycle comes from cold start emissions, that is, pollutants that are emitted before the catalytic converter is hot enough to begin catalyzing combustion products. THERMAL MANAGEMENT

  23. WASTE HEAT UTILISATION Heat recovered from any of the above sources can be used in a variety of ways. For winter driving, heat recovery from HEV sources such as the power unit exhaust, propulsion motors, batteries, and power inverter can significantly improve cabin warm-up. THERMAL MANAGEMENT

  24. What's Next for HEVs? HEVs are now at the forefront of transportation technology development. Hybrids have the potential to allow continued growth in the automotive sector, while also reducing critical resource consumption, dependence on foreign oil, air pollution, and traffic congestion.

  25. thank you

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