Solution Manual For Automotive Engines Diagnosis, Repair, and Rebuilding 9th Edition Tim Gilles, Tim LeVan |All Chapters (1-19)|Latest Version 2025 A+

InstructorrrManual:rrAutomotiverrEnginesrrDiagnosis,rrRepair,rrandrrRebuildingrr9thrrEditionrrTimrrGilles,rrTimrrLeVan




SolutionManual For r rr



Automotive Engines Diagnosis, Repair, and Rebuilding 9th Edition Tim Gilles, Tim LeVan
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Chapter 1-19 rr




Chapter 1: Engine Operation
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TABLE OF CONTENTS RR RR




Purpose and Perspective of the Chapter .................................................................................................. 2
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Chapter Objectives...................................................................................................................................... 2
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Complete List of Chapter Activities and Assessments ............................................................................ 2
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Key Terms ................................................................................................................................................... 3
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What’s New in This Chapter ..................................................................................................................... 3
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Chapter Outline........................................................................................................................................... 3
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Lesson Hints ................................................................................................................................................ 5
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Reading Assignment ................................................................................................................................... 5
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Written Assignments ................................................................................................................................... 5
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Chapter 1 Answers To Study Questions..................................................................................................... 5
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Chapter 1 Answers To ASE-Style Review Questions .................................................................................. 6
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, InstructorrrManual:rrChapterrr1:rrEnginerrOperation




PURPOSE AND PERSPECTIVE OF THE CHAPTER RR RR RR RR RR




The purpose of this chapter is to introduce students to the basic construction and operation of an internal c
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ombustion engine. It describes the many engine components and how to identify the various pieces. Also e
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xplained are the different engine classifications along with the different systems and how they work toget
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her to keep the engine operating effectively.
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CHAPTER OBJECTIVES RR




Upon completion of this chapter, the student should be able to:
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 Explain the principles of internal combustion engine operation.
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 Identify internal combustion engine parts by name.
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 Explain various engine classifications and systems.
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COMPLETE LIST OF CHAPTER ACTIVITIES AND ASSESSMENTS RR RR RR RR RR RR




For additional guidance, refer to the Teaching Online Guide.
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Chapter Activity/Assessment Source (i.e., PPT rr rr Duration
Objective slide, Workbook) rr


Explain the princ rr rr Icebreaker PPT slide 2 rr rr 10–15 mins rr


iples of internal crr rr rr


ombustion engin rr


e operation.
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Identify internal rr r Activity PPT slide 27 rr rr 10–20 minutesrr


combustion eng
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ine parts by na
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me.


Explain various rr r Self-Assessment PPT slide 29 rr rr 5–10 minutes
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engine classific
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ations and rr


systems.




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, InstructorrrManual:rrChapterrr1:rrEnginerrOperation




KEY TERMS RR




BDC: Bottom Dead Center, referring to the location of the piston at the bottom of the stroke
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bimetal engine: Engines composed of cast iron block and aluminum heads
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blowby: Gasses that escape past piston rings
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companion cylinders: term given to pairs of cylinders found in engines with even number of cylinders
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compression ratio: the ratio at which the air fuel gas mixture is compressed d
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isplacement: refers to the volume that the piston displaces in the cylinder firi
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ng order: The sequence in which the spark plugs fire in each cylinder
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lower end: Refers to the location at the bottom of the block where the crankshaft and bearings are lo
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cated

TDC: Top Dead Center, referring to the location of the piston at the top of the stroke
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transverse engine: term given to the engines in front wheel drive vehicles
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WHAT’S NEW IN THIS CHAPTER RR RR RR RR




[Information to be added later by author] rr rr rr rr rr rr




The following elements are improvements in this chapter from the previous edition:
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CHAPTER OUTLINE RR




 In a simple one-cylinder engine, the reciprocating (up-and-
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down) motion of the piston is changed to usable rotary motion by the connecting rod and cranksha
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ft. A flywheel gives momentum to the crankshaft between power strokes. Valves control the engi
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ne’s intake and exhaust. (PPT Slide 4)
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 During one four- rr rr


stroke cycle, the intake, compression, power, and exhaust strokes are completed. This action takes
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720°
r , or two crankshaft revolutions. (PPT Slide 5)
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, InstructorrrManual:rrChapterrr1:rrEnginerrOperation



 The compression ratio is how the engine makes the most efficient use of the combustion event in
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each cylinder. The higher the compression ratio the more potential output a cylinder has. (PPT
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Slide 6) rr




 Cylinders are arranged in-line, in a V- rr rr rr rr rr rr


type, or opposed to each other. The most popular automotive engines have four, six, or
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eight cylinders. (PPT Slide 7)
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 The camshaft controls the opening and closing of the valves and, thus, the way that the engine
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breathes. Different cam grinds provide better low-speed or better high-
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speed operation. (PPT Slides 8, 9)
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 The camshaft is driven by a chain, a belt, or gears. (PPT Slide 8)
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 Camshafts are driven by a timing chain or a timing belt. (PPT Slides 8, 9)
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 Cylinder rows, called banks, are determined from the flywheel end of the engine. A complete
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engine assembly including the heads is called a long block; without heads it is called a short
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block. (PPT Slide 12, 13)rr rr rr rr




 The crankcase houses the crankshaft and bearings. It is enclosed by the oil pan. The crankshaft
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has a flywheel on one end and a vibration damper or pulley on the other end. The part that the
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bearing rides against is called the main or rod bearing journal. Crankpins on four cylinders are
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offset from each other by 180°
rr , in-line six cylinders by 120°
rr , and V8s by 90°. (PPT Slides 14)
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 Engine sizes are described by their cylinder displacement, usually in liters. Engine breathing
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determines the power that the engine develops. (PPT Slide 15)
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 The location of the camshaft depends on the engine design and the type of vehicle the engine is
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being put in. Cam- rr rr r r


In Block engines have the camshaft in the cylinder block. Overhead cam engines have the cam
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shaft in the cylinder head. (PPT Slide 17)
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 Engine cylinders are fired in one of several firing orders. (PPT Slide 21)
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 Pairs of pistons that go up and down together but fire 360°
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ompanions. (PPT Slide 19) rr rr rr




 Most engines have liquid cooling systems that use coolant to prevent rust and corrosion and
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provide additional protection against freezing and boiling. (PPT Slides 23–25)
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 Spark ignition engines utilize a spark plug to start the ignition event. (PPT Slide 26)
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 Compression engines utilize heat and pressure to start the ignition event in the cylinder (PPT
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Slide 27) rr




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