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The expansion stroke is a phase in the four-stroke engine cycle where the combustion gases expand, pushing the piston down in the cylinder. This occurs after the power stroke, where the fuel-air mixture has been ignited. During this stroke, the piston moves from the top dead center to the bottom dead center, converting thermal energy from combustion into mechanical energy. This process is essential for generating the power needed to drive the engine.
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Working principal type description operation of shaping machine?
there are two stroke include in this forward stroke &return stroke during the forward stroke machine works means it removes the material from workpiece & during the return stroke machine remains idle
Why does the shaping tool move faster during the return stroke?
During the return stroke it does not remove any material, it is an idle stroke so to improve the cutting efficiency it will move faster during the return stroke. Pradip Kotak.
The Compression Stroke pulls the fuel-air mixture into the cylinder?
No, the intake stroke pulls fuel-air into the cylinder, the compression stroke squeezes (compresses) this mixture into a small volume.
2 stroke vs 4 stroke?
On a 2 stroke engine, each cylinder fires every time the piston comes up. On a 4 stroke engine, the cylinder only fires every OTHER time the piston comes up. 4 stroke engines have 4 strokes: Intake, compression, power, and exhaust. 2 stroke engines complete these cycles in only two strokes of the piston by use of ports in the cylinder walls. 2 stroke engines usually produce more power for a given weight/size. But, in gasoline engines, 2 stroke engines are typically less efficient (use more gas) and have much higher pollution levels (note: some newer "direct injection" 2 stroke engines do much better on pollution levels than the typical 2 stroke)
Describe the position of the intake valve and the exhaust valve during each stroke of a four stroke engine?
In a four-stroke engine, the intake valve opens in the intake stroke, allowing air-fuel mixture to enter, while the exhaust valve remains closed. During the compression stroke, both valves stay closed to build pressure. In the power stroke, the fuel ignites, pushing the piston down, with both valves still closed to retain pressure. Finally, in the exhaust stroke, the exhaust valve opens, allowing gases to escape, while the intake valve stays shut. This cycle repeats continuously, ensuring efficient engine operation.
Is expansion an suction stroke same?
No.
Does the atkinson cycle delay compression stroke in the exhaust?
The Atkinson cycle engine is designed to extend the expansion stroke relative to the compression stroke, which improves thermal efficiency by allowing for more complete combustion and energy extraction. This design effectively delays the closing of the intake valves, leading to a shorter compression stroke compared to the expansion stroke. However, it does not inherently delay the exhaust stroke; rather, it modifies the timing of intake and compression in a way that optimizes overall engine efficiency. Thus, while the Atkinson cycle alters the compression dynamics, it does not directly delay the exhaust stroke.
What is four stroke petrol?
the engine works on suction,compression,expansion and exhaust.this works done very quickly
How do you distinguish a four stroke and two stroke bike without opening the engine?
Theres an expansion chamber on the right side of 2-strokes. Its a fat pipe between the front of the engine and the exaust....
What is the correct sequence of strokes in a four-stroke engine?
Air and fuel intake, compression and ignition, combustion and expansion, exhaust
What is four stroke petrol engine?
the engine works on suction,compression,expansion and exhaust.this works done very quickly
Air and fuel intake compression and ignition combustion and expansion and exhaust are sequential steps in?
The four-stroke engine cycle.
How does the stroke increase the force of the combustion?
In a stroke engine, the stroke increases the force of combustion by creating a larger volume in which the air and fuel mixture can burn. This larger volume allows for greater expansion of the gases during combustion, which results in increased pressure and force exerted on the piston.
What is the correct sequence of steps in the four stroke engine cycle?
air and fuel intake, compression and ignition, combustion and expansion, exhaust
In which step of the four stroke engine cycle does the heat from the combustion reaction cause the pistons to move?
The heat from the combustion reaction causes the pistons to move during the power stroke in the four-stroke engine cycle. This is when the high-pressure gases from the combustion expand, pushing the piston downward.
Which stroke in the four stroke cycle begin as the compressed fuel mixture is ignited in the combustion chamber?
The stroke that begins as the compressed fuel mixture is ignited in the combustion chamber is the power stroke. This occurs after the compression stroke when the spark plug ignites the fuel-air mixture, causing a rapid expansion of gases that pushes the piston down, generating power. This downward movement of the piston converts the chemical energy of the fuel into mechanical energy.
In which step of the four stroke engine cycle does the spark plug initiate the combustion reaction?
Compression and ignition
