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What are the disadvantages to have a large valve overlap?
High end Rpm output tails sooner, engines idle is lumpy, emissions are higher, too much overlap can cause rough low rpm driving, more chance of detonation.
Where is the EGR valve on a 1997 Hyundai Elantra?
Does not have one. The engine uses cam overlap to achieve the effect of the EGR valve.
What does the term valve overlap mean?
Valve timing overlap is the time when both exhaust and intake valves are open most engines with catalytic converters require valve overlap in order to send a small amount of raw fuel/ air mix to the converter's. An "open cam" has valve overlap a "closed" cam does not
What is purpose of valve overlap?
It improves the efficiency of the engine by allowing better exhaust out flow and intake in flow.
When the intake and exhaust valves are both open at the same time that length of time is called?
Valve overlap.
What is valve overlap?
Valve overlap occurs in a four-stroke engine at the end of the Exhaust stroke and at the beginning of the Induction stroke; and is when both the exhaust and inlet valves are open at the same time. At the end of the Exhaust stroke, the Exhaust valve is closing and the Inlet valve is starting to open in preparation for the induction of fuel and air into the cylinder. It is common knowledge that in vehicles that cannot alter the valve timing, the Inlet valve opens approx 6 degrees before top-dead-centre and the Exhaust valve closes at 9 degrees after top-dead-centre
What does a overlap valve do?
send a small amount of raw fuel/air to the catalytic convertor,which increases the efficiency of the operating engine.
What happen if the niche of two organisms overlap?
If the niches of two organisms overlap it can cause problems. Problems could be competition between the organisms eliminating one of them.
What will cause a 1998 24 valve Ford Taurus to overheat?
what will cause a Ford Taurus 1998 24 valve to overheat
Do irrigation valve cause water hammer?
Any quick closing valve such as a solenoid can cause hydraulic shock waves
How do heart attacks affect the mitral valve?
Heart attacks that damage the structures that support the mitral valve are a common cause of mitral valve insufficiency. Myxomatous degeneration can cause a "floppy" mitral valve that leaks.
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.
