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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 else can I help you with?
In four-stroke engine the time period when both valves slightly open?
overlap
What is the second stroke called?
In a four-stroke engine its called the compression stroke
The first stroke of a two stroke cycle engine is?
It is called the compression stroke.
What is the name of the 4 stroke engine cycle?
'a 4 stroke engine cycle' is usually what it is called...
Will four stroke oil damage two stroke engine?
You can use four stroke oil for a (very) limited period in a two stroke engine in an emergency. However it is not formulated for two stroke engines and is not recommended.
Is two cycle oil and two stroke oil the same?
Yes. A 2 cycle engine is also called a 2 stroke engine.
Advantages of two stroke engine over a four stroke engine?
Explain the advantages of four-stroke engine over two-stroke engine
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.
When an engine has a cylinder bore that is larger than its stroke what is this called?
Oversquare
What is the difference between a 2 stroke and a 4 stroke lawn mower engine?
Four-stroke engines have a spout where you add oil to the engine. On two-stroke engines, oil has to be added to the fuel. (Four-stroke and two-stroke are also called four-cycle and two-cycle, respectively).
Which engine was invented first.Two stroke engine or four stroke?
two stroke
Why fuel consumption is less in 4 stroke engine then in 2 stroke engine?
Why the fuel consumption is less in 4 stroke engine as compared to 2 stroke engine
