Transcript Hybrid Text Presentation

Automotive Service
Auto Service Study Guide
Chapter 38
Pages 694-723
Hybrid Drive Systems
48 Points
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Hybrid abbreviated version of hybrid electric vehicle (HEV);
a type of vehicle that uses two types of propulsion.
Híbrido La versión abreviada de vehículo eléctrico híbrido (HEV);
Un tipo de vehículo que usa dos tipos de propulsión.
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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.
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1. A ____________ vehicle uses 2 individual power sources to provide
energy for propulsion.
http://www.youtube.com/watch?v=w20T_7IhHo0
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2. A hybrid ______ - _____________ vehicle has an gas internal combustion
engine and an electric drive system combined into one vehicle power train.
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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
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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
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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)
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6. The gas-electric hybrid uses a conventional ___________ ______________
system to fuel the engine…ICE
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7. The motor-generator is used to both ____________ the vehicle
and to help ________ the vehicle.
Power & Stop
Limit & Advance
Afford & Payoff
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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
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9. 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
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10. Mild hybrids often have a ____ or a ____ volt electrical accessory system
for EPS & HVAC.
6 or 12
36 or 42
90 or 100
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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
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Have a separate Generator & Traction Motor
[X] series [ ] parallel [ ] series-parallel
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Motor-Generator can’t simultaneously
drive & recharge
[ ] series [X] parallel [ ] series-parallel
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Can use any combination of drive & recharge
[ ] series [ ] parallel [X] series-parallel
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Series
Parallel
Series-Parallel
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A series-parallel
hybrid design
allows the vehicle
to operate in
electric motor mode
only or in
combination with
the internal
combustion engine.
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A drawing of the power flow in a
typical series-hybrid vehicle.
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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 dottedline arrows indicate the transmission of electrical current.
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The power flow in a typical
parallel-hybrid vehicle.
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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.
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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
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The BAS system is used in the Saturn VUE hybrid SUV.
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12. ________ - ____ hybrids can be connected to 120 - volt home outlet
to fully recharge the battery pack.
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12. ________ - ____ hybrids can be connected to 120 - volt home outlet
to fully recharge the battery pack.
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13-18. The 6 modes of full hybrid drive system operation are:
All-electric drive mode
Regenerative braking mode
Motor-assist mode
Idle stop mode
Engine starting mode Battery pack recharging mode
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19. __________________ 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
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20. 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
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21. 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
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22. High-voltage power cables are large in diameter and easily identified by their
bright _________ color.
Yellow
Blue
Orange
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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.
WARNING:
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Jump-Starting The 12-volt auxiliary battery may be jumpstarted 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.
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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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27. The “MG” is usually a synchronous ac permanent _________,
brushless motor-generator design.
Magnet
Vacation
Disability
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28. A ___________ can step dc voltage either up or down.
Converter
Inverter
Reverter
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29. An _______________ can either change dc to ac or ac to dc.
Converter
Inverter
Reverter
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30. The __________ _____________ is a planetary gearset used to control
the transfer of power through the hybrid drive train. It is computer-controlled.
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30. The __________ _____________ is a planetary gearset used to control
the transfer of power through the hybrid drive train. It is computer-controlled.
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31. For safety against short circuits and electrocution, __________ __________
interrupters, impact sensors or ___________ switches and high voltage fuses
are used in hybrid systems.
Ground Fault & Inertia
Power Fault & Inertia
Nobody’s Fault & Inertia
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32. Hybrid systems can be cooled by ______________ coolant, by blower fan
circulating ________ past the battery pack, and/or by a separate R-134a
refrigerant cooling system.
Engine & Air
Passenger & Air
Refrigerant & Air
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33. The hybrid power display informs the driver with a ________ ______ light,
a ____________ warning light, a ______________ ________ warning light,
and a conventional MIL.
Drive Ready, Master, Battery Pack
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34. Besides wearing safety glasses, removing all conductive jewelry, and creating
a high-voltage buffer zone when working on hybrids, OHSA-approved
gloves with a _________ volt insulation value must be worn.
250
750
1000
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Use of a warning cover over the steering
wheel helps others realize that work is
being performed on the high-voltage
system and that no one is to attempt to
start or move the vehicle.
A lock box is a safe location to keep the
ignition keys of a hybrid electric vehicle
while it is being serviced. Notice that
this lock box has two separate locks so
it would require two people to open,
helping to insure that no harm is done
by accidentally attempting to start a
HEV.
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Insulated tools, such as this
socket set, would provide an
additional margin of safety to
the service technician when
working around high-voltage
components and systems.
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GM Future Car
By: Dustin Westphal
1-2009
The Power Cell
• GM Skateboard car, powered by Hydrogen. . .four wheel drive
electric engines, powered by the electricity produced by the
hydrogen fuel cell. water is the only emission.
How it Works
Part Description
Hydrogen Fuel Cell for Power
Hy-Wire
• Hy-wire is a descendant of the GM Autonomy released at the
2002 North American International Auto show. The Autonomy is
a car which combines a hydrogen fuel cell with drive by wire
technology. These technologies in combination allow all the
mechanicals of the car to reside as a separate component to the
body and passenger space.
• A single docking port provides the electrical connection
between the chassis and body. There are 10 pick-up points
where the body mounts the chassis. Such few attachments
provide maximum flexibility when designing a body.