Automotive Service

Automotive Service Auto Service Study Guide Chapter 38 Pages 694-723 Hybrid Drive Systems 48 Points

Automotive Service

Automotive Service Hybrid abbreviated version of hybrid electric vehicle (HEV); a type of vehicle that uses two types of propulsion. HíbridoLa versión abreviada de vehículo eléctrico híbrido (HEV); Un tipo de vehículo que usa dos tipos de propulsión.

Automotive Service There are about 1.1 million hybrid vehicles on the road and some experts say that within 5 years, 20-25% of all new car & light truck sales will have hybrid powertrains.

Automotive Service 1. A ____________ vehicle uses 2 individual power sources to provide energy for propulsion. http://www.youtube.com/watch?v=w20T_7IhHo0

Automotive Service 2. A hybrid ______ - _____________ vehicle has an gas internal combustion engine and an electric drivesystem combined into one vehicle power train.

Automotive Service 3. The extremely high _____________ and high ____________ stored and generated by gas-electric hybrid drive trains are the primary safety concerns when working on these vehicles. High Voltage & High Current

Automotive Service 4. About 110 years ago (1898) _____________ __________ built a car that used a small internal combustion engine to spin a large electric generator. Reprimand Ferdinand On-Demand

Automotive Service 5. The 6 major assemblies working in unison under the computer control to propel a hybrid vehicle and to operate its electrical accessory systems are: The high–voltage ________ _____ (many cells wired in series) The ____ - _______ (that can change functions between propulsion & generation) The ____ ________ (high voltage electronics to either invert or convert ac & dc) The ______ _____ ___ (an electronic control unit that monitors and controls) ____ _______ (large, insulated conductors, often bright orange in color) The _______ ________ ________ (either gasoline or diesel for highway speeds)

Automotive Service 6. The gas-electric hybrid uses a conventional ___________ ______________ system to fuel the engine…ICE

Automotive Service 7. The motor-generator is used to both ____________ the vehicle and to help ________ the vehicle. Power & Stop Limit & Advance Afford & Payoff

Automotive Service 8. A vehicle that uses the motor-generator to initially accelerate and only runs the engine when the battery pack becomes discharged is known as a: [ ] full hybrid [ ] mild hybrid

Automotive Service • A vehicle propelled by its internal combustion engine only and then shuts it • down for coasting, braking, or stopping and then quickly restarts it when the brake pedal is released is a: [ ] full hybrid [ ] mild hybrid

Automotive Service • Mild hybrids often have a ____ or a ____ volt electrical accessory system • for EPS & HVAC. 6 or 12 36 or 42 90 or 100

Automotive Service 11. When describing or classifying Hybrid Drive Train Configurations: Have a separate Generator & Traction Motor [ ] series [ ] parallel [ ] series-parallel Motor-Generator cannot simultaneously drive & recharge [ ] series [ ] parallel [ ] series-parallel Can use any combination of drive & recharge [ ] series [ ] parallel [ ] series-parallel

Automotive Service Have a separate Generator & Traction Motor [X] series [ ] parallel [ ] series-parallel

Automotive Service Motor-Generator can’t simultaneously drive & recharge [ ] series [X] parallel [ ] series-parallel

Automotive Service Can use any combination of drive & recharge [ ] series [ ] parallel [X] series-parallel

Automotive Service Series Parallel Series-Parallel

Automotive Service A series-parallel hybrid design allows the vehicle to operate in electric motor mode only or in combination with the internal combustion engine.

Automotive Service A drawing of the power flow in a typical series-hybrid vehicle.

Automotive Service This diagram shows the components included in a typical series-hybrid design. The solid-line arrow indicates the transmission of torque to the drive wheels. The dotted-line arrows indicate the transmission of electrical current.

Automotive Service The power flow in a typical parallel-hybrid vehicle.

Automotive Service Diagram showing the components involved in a typical parallel-hybrid vehicle. The solid-line arrows indicate the transmission of torque to the drive wheels, and the dotted-line arrows indicate the flow of electrical current.

Automotive Service BELT ALTERNATOR STARTER SYSTEMS (BAS) The belt system, called the belt alternator starter (BAS), is the least expensive system that can still claim the vehicle is a hybrid.For many buyers, cost is a major concern and the BAS system allows certain hybrid features without an entire redesign of the engine and power train. Consumers can upgrade to BAS hybrids at a reasonable cost and will get a 2% to 5% increase in fuel economy, mostly affecting city mileage.BAS replaces the belt-driven alternator with an electric motor that serves as a generator and motor. When the engine is running the motor, acting as a generator will charge a separate 36-volt battery (42-volt charging voltage). When the engine needs to be started again after being in idle stop, the BAS motor cranks the engine by taking power from the 36-volt battery pack and applies its torque via the accessory belt

Automotive Service The BAS system is used in the Saturn VUE hybrid SUV.

Automotive Service • ________ - ____ hybrids can be connected to 120 - volt home outlet • to fully recharge the battery pack.

Automotive Service 13-18. The 6 modes of full hybrid drive system operation are: All-electric drive mode Motor-assist mode Idle stop mode Regenerative braking mode Engine starting mode Battery pack recharging mode

Automotive Service • __________________ braking uses the kinetic energy of normal stopping to • recharge the high voltage battery pack. NOTE: During quick, hard braking the conventional hydraulic system is used. Regurgitate Regenerative My Generation

Automotive Service • Hybrids use 2 voltage systems, the high-voltage system for the drive system • and a ___ - volt system for the vehicle’s conventional electrical & electronic • components – including the computer systems. Medium Ultra-High Low

Automotive Service • The hybrid high-voltage system can range • from ______ to ______ volts ac or dc… • That’s deadly! 250 to 650 360 to 420 90 to 100

Automotive Service • High-voltage power cables are large in diameter and easily identified by their • bright _________ color. Yellow Blue Orange

Automotive Service WARNING:Power remains in the high-voltage electrical system for up to 10 minutes after the HV battery pack is shut off. Never touch, cut, or open any orange high-voltage power cable or high-voltage component without confirming that the high voltage has been completely discharged.

Automotive Service Jump-StartingThe 12-volt auxiliary battery may be jump-started if the vehicle does not start. The 12-volt auxiliary battery is often located under the hood but can also be located in the cargo area of some HEVs.

Automotive Service 23-26. The full hybrid motor-generator or “MG” has 4 basic functions: Helps power the _________ _________ and propel the vehicle __________________ the high-voltage battery pack _____________ the internal combustion engine Helps to _________ and ________ the vehicle

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