Four-Stroke Engine Basics Instructor: Nina Kirichenko Next Orientation

Four-Stroke Engine Basics Instructor: Nina Kirichenko Next

Orientation Throughout this lesson on four-stroke engines, a student will self-navigate through this PowerPoint presentation Be sure to click on every link Student will be quizzed at the end of the lesson Click on Next to move on, or Back to go back. Next Back

Orientation Continued Material that will be covered: Four-stroke engine basics Other engine types Basic components of a four-stroke engine The four-stroke cycle Next Back

Next Back

The Basics A four-stroke engine: Is an internal combustion engine Converts gasoline into motion Is the most common car engine type Is relatively efficient Is relatively inexpensive Next Back

Other Engine Types Two-stroke engines Diesel engines Rotary engines Turbine engines Steam engines Next Back

Basic Components of Four-Stroke Engines Intake Valve Valve Cover Intake Port Head Coolant Engine Block Oil Pan Oil Sump Crankshaft Camshaft Exhaust Valve Spark Plug Exhaust Port Piston Connecting Rod Rod Bearings Back Next Diagram

Intake Valve A. Intake Valve- opens at the proper time to let in air and fuel. Back

B. Valve Cover- Protects the valves and the valve springs. Keeps dirt out and lubricating oil in. Back

Intake Port C. Intake Port- the passageway in a cylinder head for the fuel and air to pass through. Back

Head D. Head- a platform containing most of the parts of the combustion chamber. Back

Coolant E. Coolant- circulating water and antifreeze to keep the temperature regulated. Back

Engine Block F. Engine Block- cast in one piece. The basis for most of the parts of the engine. Back

Oil Pan G. Oil Pan- where the oil is collected and recirculated. Back

H. Oil Sump- the collected oil primarily for lubricating the crankshaft and rod bearing Back

Camshaft I. Camshaft- a round shaft with lobes, that rotates to open and close the fuel and exhaust valves. Back

Exhaust Valve J. Exhaust Valve- open at the proper time to release the exhaust Back

Spark Plug K. Spark Plug- a device, inserted into the combustion chamber for firing an electrical spark to ignite air-fuel mixture Back

L. Exhaust Port- the passageway in a cylinder head, for the exhaust to pass through Back

Piston M. Piston- the part of the engine that moves up and down in the cylinder converting the gasoline into motion Back

Connecting Rod N. Connecting Rod- links the piston to the crankshaft. Back

Rod Bearing O. Rod Bearing- used to reduce friction to the rod and crankshaft Back

Crankshaft P. Crankshaft- converts the up and down motion of the piston into a turning, or rotating motion Back

The 4-Stroke Cycle 1. 2. 3. 4. Intake Compression Combustion Exhaust Back Next

Intake- process of filling the cylinder with the proper air-fuel mixture through the intake valve. Back

Compression- the process of compressing the air-fuel mixture in the cylinder to make it more combustible Back

Combustion Combustion-the process of igniting the compressed air-fuel mixture to create motion and the over all power of the engine. Back

Exhaust Exhaust- the process of releasing the exhaust out of the cylinder through the exhaust valve. Back

Application Now that you understand the basics of four-stroke engines, how can you use this information in the real world? Back Quiz

Lets take a quiz to see what you have learned! Back Quiz

1. The ____ controls the amount of intake and the release of exhaust. a. head b. valves c. coolant d. connecting rod

The _____ Cycle is the ignition of the compressed fuel-air mixture. a. Exhaust b. Combustion c. Compression d. Intake

The most common type of engine? a. diesel engines b. 2-stroke engines c. rotary engines d. 4-stroke engines

What part of the engine converts up and down motion into a rotation motion? a. crankshaft b. piston c. valve cover d. camshaft

What is the name of the part listed? a. intake valve b. piston c. oil pan d. spark plug

Sorry, that is the wrong answer. Try again. Back

Sorry, that is the wrong answer. Try again. Back

Sorry, that is the wrong answer. Try again. Back

Sorry, that is the wrong answer. Try again. Back

Sorry, that is the wrong answer. Try again. Back

That is correct! Lets try the next one. Next

That is correct! Lets try the next one. Next

That is correct! Lets try the next one. Next

That is correct! Lets try the next one. Next

That is correct! Lets try the next one. Next

Congratulations! That is the end of your quiz, and the end of your lesson on four-stroke engines. Next

References www.howstuffworks.com/ www.mda.org.uk/railway/railobjv.htm To Beginning Last Slide