Late fuel injection in a diesel engine is...

Late fuel injection in a diesel engine is...

Question 1 of 292185eccefa2bacbc34ba4d478d0

Late fuel injection in a diesel engine is indicated by low firing pressure with __________.

Question 1 of 29218

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Q

Late fuel injection in a diesel engine is indicated by low firing pressure with __________.

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🔍 Key Concepts

• Relationship between fuel injection timing and combustion temperature in diesel engines • How late injection affects cylinder pressure and heat release • Typical causes of high vs. low exhaust temperature in diesel operation

💭 Think About

• If fuel is injected later than normal, will more of the burning happen while the piston is going down or up? How does that affect peak firing pressure? • When combustion happens later in the stroke, what happens to how completely the fuel burns and where the heat ends up (in the cylinder vs out the exhaust)? • Which kind of knock (fuel vs mechanical) is most associated with early injection rather than late injection?

✅ Before You Answer

• Compare symptoms of early vs late injection: which one tends to raise exhaust temperature? • Think about whether incomplete combustion generally makes exhaust hotter or cooler for the same fuel amount. • Eliminate any options that are strongly tied to advanced (early) timing rather than retarded (late) timing.