A d16z6 has 16 valves 8 intake and 8 exhaust valves.
8 Intake and 8 Exhaust.
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.
Depends on engine size. Typically two valves per cylinder. One intake and one exhaust. Some higher performance applications can have four valves per cylinder.
12. one intake and one exhaust valve for ea. cylinder. The 3.8 is a V6 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
8 intake and 8 exhaust for a total of 16
60 (5 valves for each of the 12 cylinders. Three of the valves on each cylinder are for intake and two are for exhaust.)
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.
Intake valves run cooler than exhaust valves and they are made of different material, so their thermal expansion is less than the exhaust valves. Therefore, they can have a smaller valve lash clearance, since they won't 'grow' as much due to thermal expansion, and won't present the problem of slamming into the top of the piston as readily as exhaust valves with too-small valve lash clearances will. But, not all engines have dissimilar valve lash clearances on intake and exhaust. Many small single-cylinder engines have exactly the same clearance on both intake and exhaust valves.
On a V8 engine there is ( 1 intake manifold and 2 exhaust manifolds )
The only difference is the dohc engine has 2 camshafts, an intake and an exhaust camshaft. A standard 2.0 has only 1 camshaft. Many dohc engines also have 4 valves per cylinder whereas a 2.0 sohc generally has 2 valves per cylinder.