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Four (4) Stroke Engines are described along with it’s various parts, working principles, advantages, disadvantages, etc. for basic understanding. A lot of images, diagrams are captured to visualize this engine.
A four-stroke engine is an internal combustion engine that utilises four distinct piston strokes (intake, compression, power, and exhaust) to complete one operating cycle. A complete operation in a four-stroke engine requires two revolutions (720 0 ) of the crankshaft.
What are the main parts of four-stroke engine? Piston, Crankshaft, Crankcase, Connecting Rod, Spark Plug, Piston, Cylinder Head, Cylinder Block, Inlet and Outlet Valves. Which type of engine tend to wear out fast?
A four-stroke engine is a famous type of internal combustion (IC) engine. This engine completes a power cycle in four strokes of the piston. The piston reciprocates inside the engine cylinder. This article explains the 4-stroke engine working, types, components, and applications.
Common four stroke engine components include: Piston. Connecting Rod (Con Rod) Plain Bearings. Crankshaft. Camshaft. Combustion Space (Cylinder Liner) Inlet Valves and Exhaust Valves. Pushrods. Rocker Arms. Fuel Injectors. Access the below 3D model if you would like to learn all of an engine's main components and some engine terminology.
#1. Intake Stroke. Intake stroke occurs when the air-fuel mixture is introduced to the combustion chamber. In this stroke, the piston moves from TDC (Top Dead Center – the farthest position of the piston to the crankshaft) to BDC (Bottom Dead Center – the nearest piston position to the crankshaft.)
A Four-stroke engine consist of the following parts: Cylinder: It is the heart of the engine. The piston reciprocates in the cylinder. Cylinder head: It is the top cover of the cylinder, towards TDC, which is called the cylinder head. Piston: It is the reciprocating member of the engine. It reciprocates in the cylinder.
The parts of the four-stroke engine are: Inlet valve and outlet valve : The input valve allows fresh air to enter and mix it with fuel, and the output valve simultaneously removes the spent air-fuel combination from the cylinder.
The 4-stroke engine cycle includes the intake stroke (air/fuel mixture enters the engine), compression stroke (mixture is compressed), power stroke (mixture is ignited to propel the vehicle) and exhaust stroke (expels spent gases), with the intake and exhaust valves being controlled by camshafts.
A four stroke engine delivers one power stroke for every two cycles of the piston (or four piston strokes). There is an animation to the right (Figure 1) of a four-stroke engine and further explanation of the process below.