Mechanical Engineering - IC Engines and Nuclear Power Plants - Discussion
Discussion Forum : IC Engines and Nuclear Power Plants - Section 1 (Q.No. 7)
7.
The exhaust valve in a four stroke cycle petrol engine
Discussion:
17 comments Page 2 of 2.
Vicky said:
9 years ago
How the opening and closing of an imelt valve and exhaust valve depend on the angle? Give reason with proof.
Md.RafiqueAzad said:
8 years ago
Cam profile is 60 degree so if it begins to open 50deg before BDC; it should travel not more than 120deg. i.e exhaust valve should close at 110 deg before TDC.
Swapnil said:
8 years ago
This is to increase volumetric efficiency.
Amit mj said:
7 years ago
But it will cause valve overlap, right?
Sid said:
6 years ago
Can anyone explain about this valve timing diagram?
Mohammad Safiq said:
6 years ago
In the Valve timing diagram of the four-stroke engine the last stroke is the exhaust so for the modified valve timing diagram the Valve opens before BDC.
RAJA MUTHU KUMAR said:
4 years ago
The effect of opening the exhaust valve before the piston reaches the BDC results in an overall gain in output. The effect of closing the exhaust valve after TDC is the inertia of the exhaust gases tends to scavenge the cylinder by carrying the maximum amount of gas left in the clearance volume. This will result in increased volumetric efficiency.
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