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Mechanical Engineering - IC Engines and Nuclear Power Plants - Discussion

Discussion Forum : IC Engines and Nuclear Power Plants - Section 1 (Q.No. 7)
IC Engines and Nuclear Power Plants
7.
The exhaust valve in a four stroke cycle petrol engine
opens at 50° before bottom dead centre and closes at 15° after top dead centre
opens at bottom dead centre and closes at top dead centre
opens at 50° after bottom dead centre and closes at 15° before top dead centre
may open and close anywhere
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
17 comments Page 2 of 2.
Sangangouda patil said:   1 decade ago
In valve timing diagram it is a 4 stroke called exhaust stroke hence exhaust valve opens before BDC at 50 and closes after TDC 15.
Sugumaran said:   1 decade ago
What @J bhargavi baaji told above is absolutely right.
Rakesh said:   1 decade ago
Can anyone explain the total diagram?
J bhargavi baaji said:   1 decade ago
Here the angle doesn't matters. As per the value timing diagram, value open before the the cycle starts and closes after the cycle. As per the question, the value opens before the exhaust process ie before the BDC and closes after TDC.
SIT said:   1 decade ago
Valve timing diagram: opening of valves are before and after dead centers.
Viswa said:   1 decade ago
In valve timing diagram any valve open always before either bdc or tdc.
Ram said:   1 decade ago
Can anyone explain this?
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