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Q: Should the intake and exhaust valves be close when the?
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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.

What are valves responsiable for?

Open/close intake & exhaust ports. let in fuel. let out gases after combustion.

What is Purpose of the cam shaft?

to open and close the intake and exhaust valves in accordance with piston and crankshaft position

What is a cam in a car?

the camshaft is i metal rod that has tear drop shaped lobes that control when the intake and exhaust valves open and close.

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.

What is the valve size in your set of heads?

Depends on the heads. The size is different for the exhaust valve and the intake valve, and different engines have different size valves. The valves are mechanical devices in the engine heads that open and close. The intake valve opens to let the air/gas mixture into the combustion chamber,. Both valves close the combustion chamber during the compression stroke, and the exhaust valve opens to let the burnt gas out during the exhaust stroke.

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.

How many cylinders move in the intake stage on a car engine?

All cylinders are moving at the same time weather it is on the intake or exhaust stage. The valves close and open in cycles. Click the link to learn more.

What is the purpose of a car valves and what is the difference between a 12 valve and a 16 valve engine?

Close one hole of your nose and try to breath in. Feel any difference. Coming back to the subject. By increasing the # of valves you get the below features. a) better combustion chamber shape, resulting in better combustion, resulting in better power and fuel economy. There are intake valves and exhaust valves. On the intake side, the intake valve opens which lets the fuel/air mixture into the combusion chamber. At some point (measured in degrees of crank rotation) the intake valve closes, the air/fuel mixture is compressed and ignited by the spark plug. Then the spent mixture exits the cylinder when the exhaust valve opens. Valve configuration varies somewhat, but regardless of how many valves there are there will always be at least one intake and one exhaust valve. Some cylinder heads have 2 intake and 2 exhaust valves which is what is described as the 4-valve per cylinder setup. As the first two responders pointed out, you have intake valves, which let air in a diesel, or air plus gas in a gasoline engine, into the cylinder; and exhaust valves, which let the spent gases leave the cylinder. One important thing multiple valves can do for you is to let the spark plug be put in the center of the cylinder, from where the flame front can radiate evenly through the chamber. A 16-valve engine (if it's a 4-cylinder) has two intake and two exhaust valves. A 16-valve engine could also be an 8-cylinder engine with 1 intake and 1 exhaust valve per cylinder. A 12-valve engine has two intake and one exhaust valve (if it's a 4 cylinder engine). a 12-valve engine may also be a 6-cylinder engine with 1 intake and 1 exhaust valve per cylinder. evan was here

What is a camshafts?

A straight, gear-driven shaft that contains lobes used to operate the intake and exhaust valves of a reciprocating engine. The camshaft is geared to the crankshaft in such a way that valves close and open at the correct time relative to the position of the piston in the cylinders.

What is the purpose of a camshaft?

The purpose of a camshaft is to open and close the intake and exaust valves.