Mechanical Engineering - IC Engines and Nuclear Power Plants - Discussion

Discussion Forum : IC Engines and Nuclear Power Plants - Section 2 (Q.No. 48)
48.
The scavenging efficiency of a four stroke cycle diesel engine is
below 50%
between 50 and 85%
between 85 and 95%
between 95 and 100%
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
3 comments Page 1 of 1.

Bhargav said:   6 years ago
The correct Answer is C.

Prateek Sarkar said:   9 years ago
Scavenging efficiency is retained volume/charge volume = retained volume/ (retained + residual) volume.

Diesel engine possess piston head crowning and its inner pressure is always much higher after expansion stroke than Patm.

So when exhaust stroke starts the product of combustion is easily washed due to high positive pressure gradient. So high scavenging.

AJAY said:   1 decade ago
What is scavenging efficiency?

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