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Name the two engine valves on a four-stroke engine?
Intake valve and exhaust valve.
Why deflected shape of piston in 2-stroke engine?
In a 2 stroke engine the piston itself is the intake/exhaust valve, instead of having separate valves as in the 4 stroke. The odd shape of the piston is the location of these valves.
Least number of valves required at the top of a four-stroke cycle engine?
Two. Intake, and exhaust.
What are the names of the strokes on a 2 stroke engine?
all strokes are the same intake, compression, power, exhaust but it all happens in 2 revolutions of the crank instead of four revolutions like 4 stroke. Also 2 stroke has no valves and four stroke has intake and exhaust valves. hope this helps
How many valves per cylinder in a four stroke engine?
Four stroke engines must have at least 2 valves: one exhaust and one intake. Most modern engines are going to 4 valves per cylinder to allow the intake and exhaust strokes to be more efficient.
Where is the camshaft located in a two cycle engine?
A two-stroke engine does not have a cam or camshaft. Seeing there is no intake/exhaust valves it would be pointless to have a camshaft.
Where are the reed valves on engine?
Reed valves are typically found in two-stroke engines, often located between the intake manifold and the crankcase. They function as one-way valves, allowing the air-fuel mixture to enter the crankcase during the intake stroke while preventing backflow during the compression stroke. In some designs, they are mounted directly on the cylinder or the intake port. Their placement helps optimize engine performance and efficiency by ensuring proper air-fuel flow.
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.
What is the difference between a 4-stroke and a 2-stroke?
A four stroke engine requires the piston to travel up and down a total of 4 times to complete one full combustion process. The 4 strokes are: intake, compression, power (ignition), exhaust. And the intake and exhaust valves are timed accordingly. A two stroke engine fires ever other stroke and uses ports for intake and exhaust (no valve train)
What is Exhaust and intake valve?
As an air/fuel mixture is drawn into the intake ports, intake valves open to allow the mixture to enter the cylinder. On the exhaust stroke of an engine, the exhaust valves open, allowing the burned air/fuel mixture to exit out the exhaust ports. Intake valves are larger than exhaust valves, and are able to be found on the "cold" or intake side of the cylinder head(s).
What is the time during the four stroke cycle when both valves are open?
During the four-stroke cycle, both the intake and exhaust valves are open simultaneously during the overlap period, which occurs at the end of the exhaust stroke and the beginning of the intake stroke. This typically happens just before the piston reaches the bottom of the exhaust stroke and just as it starts to descend for the intake stroke. The overlap allows for better scavenging of exhaust gases and aids in the intake of the fresh air-fuel mixture. The exact timing of this overlap can vary based on the engine's design and camshaft specifications.
How many intake events are there in one revolution of a four cylinder engine?
There is only one intake stroke in a four-stroke engine. The other three strokes are compression, power, and exhaust. The intake stroke is a down stroke of the piston in which fuel is drawn into the cylinder while the fuel intake valve is open. The next stroke is the compression stroke in which the valves are closed and the fuel is compressed for combustion. The following stroke is the power stroke - a downward stroke of the piston after fuel combustion that drives the crankshaft. The final stroke is the exhaust stroke, an upward stroke of the piston as the exhaust valve opens to relieve the exhaust fuel fumes.
