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What happens during the power stroke?
During the power stroke in an engine, the ignited fuel-air mixture expands rapidly, pushing the piston downward. This downward movement creates the power that drives the crankshaft, producing mechanical energy. The exhaust valve then opens to release the burnt gases, completing the power stroke cycle.
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.
Why we open the inlet valve on the exhaust stroke and the exhaust valve on power stroke?
While there may be some overlap of valve opening timing, generally speaking, the exhaust valve opens after the power stroke, and the intake valve opens after the exhaust stroke. Recap... We start the combustion cycle of a standard 4-stroke engine with the intake stroke, the intake valve is open and the vacuum created by the downward movement of the piston draws in the air/fuel mixture from the intake manifold. The intake valve closes as the piston rounds bottom dead center and the compression stroke begins on the upward movement of the piston. At or near the top of the compression stroke, the spark plug fires (both valves are closed at this point) and begins the downward power stroke. As the piston rounds bottom dead center again, the exhaust valve opens to allow the piston to push out the exhaust gasses during the upward exhaust stroke. As the piston gets to the top, the exhaust valve closes and the intake valve opens to start the process over again.
What is valve lapping?
Is the time when intake and exhaust valve remain oper during the exhaust stroke.
What is valve over lap?
Is the time when intake and exhaust valve remain oper during the exhaust stroke.
Function of valve trains?
Thats Simple (: im in a techinical H.S and im learning this the main function of the valve trains is to help push close the valves in the engine during the intake stroke and the compression stroke which helps the combustion power up (: hope that helps :D
Picture diagram of a power valve for a 1990 Yamaha yz 250?
1990 yz250 2 stroke power valve set up information, adjustment ?
Where is the glow plugs on a 2000 ford f250 power stroke?
Under the valve covers
What is the purpose of the butterfly valve inside the induction airbox of a piston engine?
The purpose of butter fly valve is to maintain one way opening during induction stroke and exhaust stroke.
What is the function of cumbustion chamber?
The combustion chamber has an exhaust valve and an intake valve. The power stroke is ignited just before TDC, in timing with the spark plug to ignite the fuel/air mixture. Hence, this forces the piston down with both valves closed. NOTE:Intake stroke (valve open to receive the f/a mixture), Compression stroke, both valves closed, Power stoke (see above), Exhaust stroke (piston upwards, with only exhaust valve open.
What happens in a powerband?
Im assuming you mean a powerband on a 2 stroke motorcycle - when you hit the a certain level of revs an extra valve opens giving you the extra power surge that you feel on the bike.
What is over lap?
Is the time when intake and exhaust valve remain oper during the exhaust stroke.
