Transcript No Slide Title

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A Systems Approach
PowerPoint® Presentation
Prepared by
René Green
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Chapter 6
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Chapter Overview
This chapter introduces the internal combustion
engine. It discusses the variety of designs in popular
usage today. It also offers a general introduction to
engine diagnosis and testing.
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Chapter Objectives
Describe the various ways in which engines
can be classified.
Explain what takes place during each stroke of
the four-stroke cycle.
Outline the advantages and disadvantages of
the in-line and V-type engine designs.
Define important engine measurements and
performance characteristics, including bore and
stroke, displacement, compression ratio,
engine efficiency, torque, and horsepower.
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Explain how to evaluate the condition of an
engine.
List and describe nine abnormal engine
noises.
Outline the basics of diesel, rotary, stratified
and Miller-cycle engine operation.
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Engine Construction
Engine Classifications
Operational Cycles
Four-stroke cycle
Two-stroke cycle
Number of Cylinders
Cylinder Arrangement
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Valve Train Type
OHC
OHV
 DOHC
 Ignition Type
 Cooling System
Type
 Fuel Type
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Four-Stroke
Gasoline Engines
Intake Stroke
Compression
Stroke
Power Stroke
Exhaust
Stroke
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Two-Stroke Gasoline Engines
Characteristics of Four-Stroke Engine
Design
In-Line Engines
V-Type Engines
Slant Cylinder Engines
Opposed Cylinder Engines
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Valve and Camshaft
Placement
Configurations
Overhead valve
 Overhead cam
 Valve Arrangement
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L-head engine design
I-head engine design
T-head engine design
F-head engine design
 Valve and Camshaft
Operation
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Engine Location
Front engine longitudinal
Front engine transverse
Mid-engine transverse
Gasoline Engine Systems
Air/Fuel Systems
Ignition Systems
Lubrication System
Cooling System
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Exhaust System
Emission Control
System
Engine
Measurement
and Performance
 Bore and Stroke
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Displacement
 Compression Ratio
 Engine Efficiency
 Torque and
Horsepower
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Engine Identification
Engine Diagnostics
Engine Temperature Tests
Oil Pressure Testing
Evaluating the Engine's Condition
Noise Diagnosis
Using a stethoscope
Common noises
• Ring noise
• Piston slap
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Piston pin knock
Ridge noise
Rod-bearing noise
Main or thrust bearing noise
Tappet noise
Abnormal combustion noises
Other Engine Designs
Diesel Engine
Rotary Engine
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 Stratified Charge Engine
Miller-cycle Engine
Electric Motors
Hybrid Vehicles
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