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© Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only.

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Presentation on theme: "© Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only."— Presentation transcript:

1 © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only

2 © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only Even though basic parts are the same, design differences can change the way engines operate and how they are repaired For this reason, you must be able to classify engines

3 © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only Common Engine Classifications 1.Cylinder arrangement 2.Number of cylinders 3.Cooling system type 4.Valve location 5.Camshaft location 6.Type of fuel burned 7.Type of aspiration

4 © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only Refers to the position of the cylinders in relation to the crankshaft There are five basic cylinder arrangements: inline V-type slant W-type opposed Cylinder Arrangement

5 © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only Cylinder Arrangement

6 © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only Number of Cylinders Most car and truck engines have either 4, 6, or 8 cylinders Some may have 3, 5, 10, 12, or 16 cylinders Engine power and smoothness are enhanced by using more cylinders

7 © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only Cooling System Type There are two types of cooling systems: Liquid cooling system surrounds the cylinder with coolant coolant carries combustion heat out of the cylinder head and engine block Air cooling system circulates air over cooling fins on the cylinders air removes heat from the cylinders

8 © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only A. Air cooling B. Liquid cooling Cooling System Type

9 © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only Fuel Type Engines are classified by the type of fuel used: Gasoline Diesel Liquefied petroleum gas (LPG), gasohol (10% alcohol, 90% gasoline), and pure alcohol may also be used

10 © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only Valve Location Engines are classified by the location of the valves: L-head engine also called a flat head engine I-head engine also called an overhead valve (OHV) engine

11 © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only L-Head Engine Both the intake and exhaust valves are in the block

12 © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only I-Head Engine Both valves are in the cylinder head

13 © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only Camshaft Location There are two basic locations for the engine camshaft: Camshaft located in the block cam-in-block engine Camshaft located in the cylinder head overhead cam (OHC) engine

14 © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only Cam-in-Block Engine Uses push rods to transfer motion to the rocker arms and valves Also called an overhead valve (OHV) engine

15 © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only Overhead Cam Engine Camshaft is located in the top of the cylinder head

16 © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only Overhead Cam Engine Single overhead cam (SOHC) engine uses only one camshaft per cylinder head Dual overhead cam (DOHC) engine uses two camshafts per cylinder head One operates the intake valves, while the other operates the exhaust Animation LinkLink

17 © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only Type of Aspiration Supercharger – Pump driven by crankshaft forces air into engine. Turbocharger – Pump driven by exhaust gases forces air into engine.

18 © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only Vehicles generally use internal combustion, 4-stroke cycle, reciprocating piston engines Alternative engines include all other engine types that may be used to power a vehicle

19 © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only Rotary Engine

20 © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only Rotary Engine Operation

21 © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only Steam Engine Used on some of the first automobiles

22 © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only Gas Turbine

23 © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only

24 © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only Horizontally Opposed Provides the lowest center of gravity of any piston engine

25 © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only Overhead Cam V-8 Features four chain-driven camshafts and 32 valves

26 © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only Inline SOHC This 16-valve, four-cylinder engine has a belt-driven camshaft and a balance shaft

27 © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only Fuel-Injected V-8 This engine uses many aluminum parts

28 © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only DOHC V-6 Each cylinder head contains two camshafts

29 © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only V-8 Engine Note the reciprocating assembly and the valve train

30 © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only Inline Diesel Six-cylinder engine with a rear drive belt for the injection pump

31 © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only V-12 Engine Two roller chains drive the overhead camshafts

32 © Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only The End


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