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What is valve overlap and why do 4 cycle engine usually have it?
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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 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 is purpose of valve overlap?
It improves the efficiency of the engine by allowing better exhaust out flow and intake in flow.
What engine valve is the largest?
The intake valve is usually larger.
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.
In a four stroke engine the time period when both valves are slightly open is called valve?
If the valve timing is correct and there are no damaged engine parts (or weak/faulty valve springs) that should not happen, yet however if the engine is "over-revved" the valves could "float" which is not normal operation. (If the engine is an interference engine there may possibly be engine damage.) That is normal and it is called valve overlap.
What is An overhead valve engine?
A 4-cycle engine that has the intake and exhaust valves located in the cylinder head.
What is the correct position of the intake valve and the exhaust valve during most of the power stage in a four-cycle engine?
Closed
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.
What are the weights and dimensions of the valve system in an IC Engine?
An IC engine comes in all sizes and shapes so the weights and dimensions of the valve system will differ. Most are a two-stroke or two-cycle engine.
How does an idle control valve work?
The idle control valve works by regulating the idle speed of the engine. The idle speed of the engine is usually controlled by the engine of the computer.
What are the of classifications of reciprocating internal combustion engines?
classification of the reciprocating Internal combustion engine. according to t he cycle of operation. 1 two stroke 2 four stroke according to the number of cylinders. 1 single cylinder. 2 multi cylinder. according to the type of fuel 1 petrol engine 2 diesel engine 3 gas engine according to the arrangement of the cylinder 1 horizontal engine 2 vertical engine 3 V engine 4 radial engine 5 W engine according the the speed of the engine 1 low speed engine 2 medium speed engine 3 high speed engine according to method of ignition 1 spark ignition engine 2 compression ignition engine according to the method of cooling 1 air cooled engine 2 water cooled engine according to valve arrangement 1 overhead valve engine 2 T head valve engine 3 L head valve engine 4 F head valve engine according to the cycle of combution 1 otto cycle engine 2 diesel cycle engine 3 dual cycle engine
