Which area of the indicator diagram...

Question 1 of 31048snOSePCL72v6NMEUPfbf

Which area of the indicator diagram illustrated, indicates the afterburning period in a diesel engine cylinder? Illustration MO-0033

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Question 1 of 31048

Which area of the indicator diagram illustrated, indicates the afterburning period in a diesel engine cylinder? Illustration MO-0033

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🔍 Key Concepts

• Afterburning period occurs when fuel continues to burn after top dead center (TDC) during the power (expansion) stroke. • On an indicator diagram, afterburning is shown where the actual pressure curve stays higher than the normal expansion line or continues rising just after TDC. • The labels (G, H, J, K) each mark different crank-angle intervals; some are before TDC (injection/ignition delay) and some are after TDC (afterburning/expansion).

💭 Think About

• Identify which labeled interval lies clearly after TDC and corresponds to continuing combustion during the expansion stroke. • Look for the portion of the curve where pressure is still increasing or remains abnormally high after the initial peak, rather than simply following a smooth expansion line. • Compare the solid expansion curve to the dashed line: where they differ most on the after-TDC side is associated with afterburning.

✅ Before You Answer

• Confirm which labels mark time intervals after TDC rather than before TDC. • Check which labeled section aligns with the portion of the curve where pressure is sustained or slightly increased after the main peak, indicating continued combustion. • Verify that the chosen label is not associated with ignition delay or injection period, which occur before TDC.