Modern marine diesel engines equipped with...

Modern marine diesel engines equipped with...

Question 1 of 270705eccefa1bacbc34ba4d4737b

Modern marine diesel engines equipped with mechanical fuel injection operate on a combustion cycle which is __________.

Question 1 of 27070

Q

Modern marine diesel engines equipped with mechanical fuel injection operate on a combustion cycle which is __________.

🔍 Key Concepts

• Diesel (compression-ignition) cycle vs. Otto (spark-ignition) cycle • How fuel is injected and burns in a mechanical fuel injection marine diesel • Which parts of the cycle are closer to constant pressure and which to constant volume in real engines

💭 Think About

• First recall which ideal thermodynamic cycle most closely represents a diesel engine, and how that differs from a gasoline engine cycle. • Think about what happens inside the cylinder during fuel injection and combustion: does pressure stay nearly the same while volume changes, or does volume stay nearly the same while pressure changes, or both at different stages? • Match the real behavior of a marine diesel with the listed idealized combinations of constant pressure, constant volume, or constant temperature.

✅ Before You Answer

• Be clear on the difference between an ideal theoretical cycle and a real engine’s operating cycle. • Verify which cycle is classically associated with compression-ignition (diesel) engines in thermodynamics texts. • Check whether combustion in a diesel is modeled as heat addition at constant pressure, constant volume, or partly each.