automotive service - grafton school district21. the _____ engine, also known as the wankel engine...
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Automotive Service Modern Auto Tech Study Guide
Chapter 12
Pages 162 - 181
Engine Classifications & Variations
35 Points
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Automotive Service
1-12. List at least 12 common ways to classify engines by their
variations in design:
Year Cooling System
Make (Manufacturer of the engine) Location of Engine in the Vehicle
Horsepower or Watts Mounting: Transverse or Longitudinal
Torque Piston or Rotary
# of Cylinders Cycle of Operation
Cylinder Arrangement Compression Ratio
Cylinder Numbering Ignition System
# of Valves Spark or Compression Ignition
Valve Arrangement Bore
# of Camshafts Stroke
Camshaft Location (OHV or OHC) Camshaft Drive: Gear, Chain, Belt
Firing Order Displacement = Total Cylinder Volume
Turbo or Super Charged or Neither Fuel Type: Diesel or Gas
Fuel Delivery System (MPI or GDI) Atkinson Cycle or Miller Cycle
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Automotive Service Click this square for a 4 stroke cycle engine explanation
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Automotive Service 13. Name three engine cylinder arrangements:
In-Line, V-shape, Flat or “Boxer”, Slant
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Automotive Service 14. ______________ ____________ is the sequence in which
the cylinders fire or ignite their air/fuel mix.
Pecking Order
Firing Order
Back Order
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Automotive Service
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Automotive Service 15. Engines can be either __________ or ______ cooled.
____________ cooling is the most common.
Air or Liquid
Gas or Water
Vacuum or Pressure
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Automotive Service
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Automotive Service
16. Spark ignition engines use a ________ plug to ignite their air/fuel mixture.
____________________ ignition engines use the intense heat of a 20:1
compression ratio to ignite the fuel. (these are diesel engines)
Glow Plug
Freeze Plug
Spark Plug
Compression
Combustion
Combination
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Automotive Service 17. Valve arrangements are either ___-head, ___-head, ___-head or ___-head.
(remember the word LIFT)
The I-head design, a.k.a. the valve-in-head or Over Head Valve (OHV) design
is the most common in use.
L-head, I-head, F-head, T-head
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Automotive Service
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Automotive Service
Over Head Camshaft
Piston
Combustion Chamber
Cylinder Head
Over Head Valve
18. Camshafts can be located in the engine block or in the
______________ ________. (Over Head Camshaft = OHC)
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Automotive Service Click this square for a diesel engine explanation
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Automotive Service
19. There’s a variety of ___________________ chamber shapes, but the
hemishperical is one of the most efficient.
Combustion
Compression
Combination
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Automotive Service 20.Variable DISPLACEMENT, variable COMPRESSION ratio, and variable
VALVE timing are now popular designs used to increase horsepower and fuel
mileage.
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Automotive Service 20.Variable DISPLACEMENT, variable COMPRESSION ratio, and variable
VALVE timing are now popular designs used to increase horsepower and fuel
mileage.
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Automotive Service 20.Variable DISPLACEMENT, variable COMPRESSION ratio, and variable
VALVE timing are now popular designs used to increase horsepower and fuel
mileage.
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Automotive Service
Displacement on Demand®
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Automotive Service
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Automotive Service 21. The ____________ engine, also known as the Wankel engine uses a spinning
triangular rotor instead of conventional pistons. It is currently used in only the
Mazda RX-8 and called the Renesis® engine.
Rotax
Rotary
Romulan Dr. Felix Wankel
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Automotive Service
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Automotive Service Click this square for a rotary engine explanation
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Automotive Service 21. ______ stroke cycle engines produce power with every down stroke.
Some diesel engines and some lawn & garden applications use this design,
but no automobiles currently use it.
2 Stroke cycle
3 Stroke cycle
4 Stroke cycle
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Automotive Service Click this square for 2 stroke cycle engine explanation
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Automotive Service
22. Engines are also classified by whether they “breath” normally or are
____________________ like the Miller-cycle engine.
Turbocharging the incoming air with an exhaust-powered fan is also popular.
http://auto.howstuffworks.com/supercharger.htm
Supercharged
Super-sized
Superceded
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Automotive Service Click this square for Supercharger & Turbocharger explanation
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Automotive Service
Bank 1 on a V-shaped engine
has cylinder #1
Cylinder #1 is the
most forward cylinder
In-Line 4 Cylinder Engine
V-8 Cylinder Engine
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Automotive Service
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Automotive Service