Video User's Guide
Contents
1. Explain the basic operation of a small gas engine ignition system Describe several ways to classify small gas engines To The Instructor This video is designed to be a valuable supplement to your curriculum Since young people are extremely acclimated to television it is a natural way to help present important aspects of your subject matter This video is designed to give a detailed yet broad coverage of the topic Most educators agree that it is best to use as many instructional methods as possible Utilise quality textbooks workbooks videos lectures demonstrations overheads and other methods to present the technical information This will hold interest and help pupils understand the large amount of information required to succeed in today s complex world This video is organised into major sections or topics Each section covers one major segment of the subject Graphic breaks are given between each section so that you can stop the video for class discussion to answer critical questions to ask questions or perform in class demonstrations with actual components or parts This program s format is arranged to be extremely flexible View it as a full length program a supplement for lectures or demonstrations for self paced individualised instruction This video allows you to watch only a portion of the program each day or the complete video depending on your curriculum requirements The program is designed to simplify the complex Conci2. b plate C head d cover 13 The oil ring used in a small engine must force excess oil through a hole in the so that the oil can return back down into the crankcase a crankshaft b camshaft c rod d piston 14 The end of a small engine s connecting rod bolts around the crankshaft a large b aluminium c small d short 15 In most small engine designs the mounts in the crankcase next to the crankshaft a lifter b camshaft c breather d piston Short Answer Briefly answer the following questions in your own words Why are most small gas engines termed reciprocating piston engines 2 What position is the exhaust valve in during a four stroke engine s intake stroke 3 Describe how a reed valve normally operates in a two stroke engine 4 Do all small gas engines use gravity feed fuel systems 5 Where is a small engine s air cleaner normally mounted 6 Why is a governor used on a small gas engine 7 What is used to prevent pressure leakage between a small engine s cylinder head and block 8 What is the function of a small engine s camshaft 9 What is the most common small gas engine cylinder arrangement 10 Name two types of lubrication systems used on small engines We Need Your Help We are constantly trying to improve our videos If you have any suggestions or comments please send them to us with details title time code location etc of any potential improvement We will try to inco
3. d pressure 3 Which of the following systems regulates the flow of a small engine s fuel mixture and burned exhaust gases a Valve train system b Ignition system c Injection system d EGR system 4 In a four stroke engine events occur to complete one cycle a two b four c eight d three 5 During the compression stroke the slides up with both valves closed to squeeze the fuel mixture a cam b lifter c piston d crankshaft 6 A two stroke cycle engine produces power on every piston movements a six b four c eight d two 7 A two stroke engine s port allows an air fuel and oil mixture to be pulled into the combustion chamber when the piston slides down a transfer b exhaust c oil d plug 8 During a four stroke cycle engine s the burned gases are pushed out by the upward moving a intake cam b exhaust valve c exhaust piston d compression piston stroke 9 When air flows through a n it pulls liquid fuel out of the bowl and nozzle a injector b manifold c carburettor d port 10 Older small engine ignition systems use contact points and a to trigger the coil to produce high voltage a magnet b condenser c transformer d module 11 The purpose of a small gas engine s system is to start combustion in the combustion chamber a ignition b injection c intake d carburettor 12 A small engine s cylinder is often a removable lid mounted on the top of the engine cylinder a shroud
4. electronic ignition module valve guides cylinder head head gasket intake manifold exhaust manifold rod cap valve face valve springs valve seals overhead valve engine valve stem rocker arm camshaft cylinder block horizontal engine vertical engine air cooled engine liquid cooled engine friction bearings anti friction bearing press fit piston pin floating piston pin flat head engine electronic fuel injection LP gas fuel system Video Discussion Topics Here are a few topics that might be used for a class discussion 1 Name the basic parts of a small gas engine 2 Explain the major differences between a two stroke and four stroke cycle engine 3 What is the purpose of a choke on a small gas engine 4 How does a small engine s air vane governor operate 5 Describe the basic operation or a small gas engine s electronic ignition system 6 How does a gravity feed carburettor normally operate 7 Name the basic parts of a small engine s reciprocating assembly 8 List some of the similarities between an automobile engine and a four stroke lawnmower engine Video Quiz Print the appropriate letter in the blank to indicate the most correct answer after reading the statement I A heavy allows a small gas engine s crank shaft to rotate smoothly a bolt b flywheel c washer d flange 2 Piston rings are used in a small engine to prevent leakage between the piston and cylinder wall a coolant b exhaust c gas
5. RWME1 Video User s Guide Small Gas Engine Construction _and Operation Meridian Education Corporation Introduction This video will explain the construction and operating principles of typical small gas engines You will learn about the differences between two stroke and four stroke cycle engines This program will discuss the major components that make up these particular engines You will also learn about the various systems that enable small gas engines to operate These systems include the fuel system the ignition system the lubricating system and more In the final section of this tape you will discover that there are several ways of classifying these small power plants The purpose of this program is to provide you with a basic understanding of small gas engine fundamentals This will allow you to comprehend the engine troubleshooting and repair techniques presented in later videos Student Objectives After viewing this video you will be able to List the basic parts of a small gas engine Describe the function of each basic component of a small gas engine Explain the differences between a two stroke and a four stroke cycle engine Name the strokes of a four stroke cycle engine Explain the sequence of events during each stroke of a four stroke cycle engine Describe how a reed valve operates in a two stroke cycle engine Explain the term gravity feed Describe the basic operation of a small gas engine fuel system
6. rporate suggestions when revising our videos Your help will be greatly appreciated We want to help you train America s youth Other titles available from e e o e meridian education corporation Small Gas Engine Construction amp Operation Item No 5350 Small Gas Engine Troubleshooting amp Tuneup Item No 5351 Small Gas Engine Disassembly Item No 5352 Small Gas Engine Inspection Measurement amp Cleaning Item No 5353 Small Gas Engine Reassembly Item No 5354
7. se wording and carefully selected graphics are used to provide maximum learning in minimum time Close up shots of components and service procedures are used to make every second of viewing instructional as if each student was standing right behind you watching over your shoulder while you were working or giving a demonstration Our technical visual images are designed to match the audio so that every scene has maximum educational value Computer animation is used to explain difficult to comprehend principles or techniques Students seem to enjoy the cartoon type images that show how parts work how they fit together or how they vary in design Quiz Answer Key 1 b2 d3 a4 65 c6 d7 a8 c9 c10 b11 a12 c13 d14 a15 b Use your own judgement to evaluate the definitions definition type questions and discussion topics Technical Terms Write definitions for the following terms Use a textbook or review the video if needed reciprocating piston engine combustion chamber piston piston rings connecting rod crankshaft journal rod journal flywheel engine cylinder crankcase valve train lifter push rod poppet valve valve seat intake stroke compression stroke power stroke exhaust stroke four stroke cycle engine two stroke cycle engine reed valve intake valve exhaust valve fuel system carburettor engine governor centrifugal force ignition system contact points condenser ignition coil magnetic field electronic ignition system
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