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Tech A says that compression ratio is the comparison of the volume above the piston at BDC to the volume above the piston at TDC. Tech B says that scavenging of the exhaust gases occurs once the exhaust
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Tech A says that compression ratio is the comparison of the volume above the piston at BDC to the volume above the piston at TDC. Tech B says that scavenging of the exhaust gases occurs once the exhaust valve closes. Who is correct?

User KennyV
by
8.1k points

2 Answers

0 votes

Answer:

Tech A

Step-by-step explanation:

Compression ratio of a internal combustion engine is about the cylinder. The ratio of maximum volume to minimum volume which is BDC and TDC respectively.

Therefore Tech A is correct.

Scavenging of exhaust gasses allows the exhaust valves to open for short time while intake valve is opened, there is a small overlap between the timing of opening and closing of intake and exhaust valves respectively.

Therefore Tech B is incorrect.

User Harindaka
by
8.3k points
6 votes

Answer:

Tech A

Step-by-step explanation:

Compression ratio of a internal combustion engine is about the cylinder. The ratio of maximum volume to minimum volume which is BDC and TDC respectively.

Scavenging is about replacement of gas, which is not related to compression ratio.

Therefore Tech A is correct.

User Martin Pabst
by
8.6k points
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