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When the piston reaches the bottom of its stroke also known as the bottom dead center the intake valve closes and the?
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When do the intake valves of an engine open?
A intake valve open when the piston reaches the top of the cylinder and just after the exhaust valve closes. It allow fuel and air to enter the engine cylinder.
How does the intake valve work?
The intake valve opens as the piston is going down. It lets in an air fuel mixture. The valve then shuts as the piston reaches the bottom.
Which of the following statements correctly describes the position of the intake and exhaust values during most of the power stage in a four cycle engine?
ClosedClosed.closedWhen the piston is at top dead center at the beginning of the power stroke both valves are closed, when the piston reaches dead bottom the exhaust valve opens up, when the piston reaches TDC again the intake valve opens, when the piston reaches dead bottom again both valves close to allow compression of the fuel, then at TDC the spark plug fires begins the power stroke again.They will be closed.
What happens during the intake and compression strokes of four stroke engines?
on the intake stoke, the piston is going down to the bottom of the cylinder. As it is going down the intake valve opens and allows a mixture of air and gas in the chamber. the piston ,once it reaches the bottom of the cylinder,it starts to travel upward(this is the start of the compression stroke) and compresses the air/fuel mixture,and at the same time the intake velve closes,craeting a sealed chamber. As the piston continues to go up it keeps squeezing the air and fuel and just before it tops out the spark-plug fires,igniting this mixture which drives the piston down,starting the power stroke. Power and Intake (novanet)
What is intake stroke in a four stroke cycle?
the air mixture i.e air and the fuel mixture entering the clyinder during the piston moving from top dead center to bottom dead center this is known as intake stroke
What is a timing belt and what does it do in a car?
The timing belt is a belt that connects the engines crankshaft to the camshaft. The crankshaft is turned by the engine's pistons and tuns the vehicles drive wheels. The camshaft opens and closes valves that let fuel and air into the engine and allow burned vapors to exhaust. Timing the valves to the piston position is crucial to making the engine run. In most engines the intake valve (allows air and fuel in) is timed to open as the piston is moving downward in it's movement. The intake closes as the piston reaches the bottom of movement and is about to come back up. As the piston rises, it compresses the air and fuel and nanoseconds before it reaches the top of it's travel a spark plug ignites the fuel (if it's a gasoline powered engine). The explosive force of the ignition forces the piston back down, which forces the crankshaft to turn. When the piston reaches the bottom again, another valve opens to allow the burned fuel vapors out of the engine. The piston moves back up to push the gases out. After reaching the top of travel the exhaust valve closes and the intake valve reopens. With out the timing belt, the engine would have no way of correlating the opening of the valves to the placement of the pistons.
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 does a cam do for dirt bike engines?
Opens and closes the intake and exhaust valves.
What is a cam ON A CAR?
The cam is in the engine and it is what opens and closes the intake and exaust valves
Where is the intake air temperature sending unit sensor on a 1992 geo tracker?
It is on the intake manifold closes to the TBI, it will be the black one.
What is valve lead?
In automotive applications, it is the number of degrees of the crankshaft before the top or bottom center, at which the intake or exhaust valves open or close.
Why the intake valves does not close until after bottom dead center?
The speed of the air as it rushes in allows for the air to continue rushing in for a little while after bdc.
