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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.

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Q: When do the intake valves of an engine open?
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Related questions

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).


How many times do the intake valves open per minute in a four stroke engine?

Trick Question! ...depends on the RPM the engine is running at.


What is meant by the term valve overlap?

There is a short time between the exhaust and intake stroke where all the valves are slightly open at the same time. This period of time is called valve overlap. This is because the intake valves are just starting to open as the exhaust valves are just finishing closing. This is done so flow through the engine can be maintained at engine operating speeds.


Function of valve?

The valves in a car engine are opened and closed by a cam shaft driven by the engine crankshaft. they allow the flow of gases and fuel into the engine and the burnt gases out of the engine into the exhaust system.


What describes the position of intake and exhaust valves during the most powerful stage in a four-cycle gas engine?

-intake: exhaust closed, intake open -compression: exhaust closed, intake closed -combustion: exhaust closed, intake closed -exhaust: exhaust open, intake closed


When the intake and exhaust valves are open this is known as?

overlap


What is and e valve?

There are two types of valves in an engine. The valves are located in the head. There are exhaust valves and fuel intake valves


How do you tell the differ beween the intake and the exhaust valve when adjusting on a350 engine 1988 corvette?

The intake valves are in the intake ports, the exhaust valves are in the exhaust ports.


What is function of a camshaft?

To open/close the intake/exhaust valves.


What is the function of a camshaft?

To open/close the intake/exhaust valves.


Is the Plymouth voyager 2.4L dohc an interference engine?

The intake valves can hit the exhaust valves.


Where is the intake manifold runner control on a 2002 ford f150 4.2L engine?

The intake runner control is in he intake manifold. It consists of a shaft and 3 butterfly valves for each cylinder bank. The opening of these valves are controlled by an electronic module located on the back of the engine behind the intake manifold ducting on top of the engine. Each set of butterfly valves are connected to the module by a link. When the computer notifies the module to open the butterfly valves, it rotates a small motor in the module, moves the links and opens the butterfly valves. The module is very difficult to get to and you must remove the top ducting to see the links and the butterfly valves