If the compression ratio is increased on any...

Question 1 / 270705eccefa1bacbc34ba4d47358

Question 1 of 270705eccefa1bacbc34ba4d47358

If the compression ratio is increased on any diesel engine, __________.

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Question 1 of 27070

If the compression ratio is increased on any diesel engine, __________.

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🔍 Key Concepts

• Compression ratio and how it affects peak pressure and temperature in a diesel engine • Relationship between compression ratio and thermal efficiency in internal combustion engines • Why diesel engines rely on high compression for ignition (no spark plug)

💭 Think About

• What happens to the air temperature in the cylinder when you compress it more (higher compression ratio)? • Does hotter, more compressed air generally make combustion more or less efficient in a diesel engine? • Is a diesel engine’s ability to convert heat to work helped or hurt by increasing compression ratio?

✅ Before You Answer

• Verify how thermal efficiency of an ideal diesel (or Otto) cycle changes as compression ratio increases • Check whether higher compression would logically speed up or slow down ignition and combustion in a compression-ignition engine • Confirm whether expansion ratio is directly tied to compression ratio in a fixed-stroke engine design

Question 1 of 27070

If the compression ratio is increased on any diesel engine, __________.

the expansion ratio will decrease

combustion will be slowed down

thermal efficiency will decrease

thermal efficiency will increase

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