Next ARRDEKTA INSTITUTE OF TECHNOLOGY GUIDED BY PROF R.S.SAGAR IN MECHANICAL DEPT. PROF.M.R.CHAUDHARY IN MECHANICAL DEPT PREPARED BY PARMAR DEVENDRASINH PARMAR DHARMESHKUMAR BABULAL PARMAR YOGENDRASINH PARMAR YUVRAJSINH JASHVANTSINH PATEL AKSHAY ARAVINDBHAI PATEL ANUPKUMAR ARVINDBHAI PATEL DARSHITKUMAR MUKESHBHAI

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

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 NextBack

NextBack

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 NextBack

Other Engine Types Two-stroke engines Diesel engines Rotary engines Turbine engines Steam engines NextBack

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

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

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

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

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

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

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

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

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

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

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

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

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

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

The 4-Stroke Cycle Intake Compression Combustion Exhaust BackNext

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

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? BackQuiz

Lets take a quiz to see what you have learned! BackQuiz

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

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

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

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

5. 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 To BeginningLast Slide