🔍 Key Concepts

• Relationship between engine load, exhaust gas energy, and turbocharger speed • How a turbocharger is driven (what provides its energy) • Effect of increasing load at constant RPM on fuel burn and exhaust flow/temperature

💭 Think About

• Think about what happens to the amount of fuel injected when you increase load on a diesel engine but keep the engine RPM constant. • How does more or less exhaust gas energy affect the turbine side of the turbocharger? • If the engine is working harder at the same speed, what must happen to the air supply to maintain efficient combustion?

✅ Before You Answer

• Be clear on how a turbocharger turbine is driven by exhaust gas flow and temperature, not by the crankshaft. • Consider whether higher load at the same RPM means more, less, or the same exhaust gas energy. • Ask whether maintaining proper combustion at higher load would require more boost, less boost, or no change in boost.