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HCCI and PPC Exam Questions With Correct Answers.

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HCCI and PPC Exam Questions With Correct Answers. PPC - answerPartially premixed ignition benefits of HCCI - answerhigh efficiency and ultra low NOx drawbacks of HCCI - answerCombustion control and Power density benefits of PPC HCCI - answerInjection controlled, less emissions advantage HCCI ...

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  • August 28, 2024
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  • 2024/2025
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  • HCCI and PPC
  • HCCI and PPC
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Thebright
©THEBRIGHT EXAM STUDY SOLUTIONS 8/22/2024 12:54 PM



HCCI and PPC Exam Questions With
Correct Answers.

PPC - answer✔✔Partially premixed ignition

benefits of HCCI - answer✔✔high efficiency and ultra low NOx

drawbacks of HCCI - answer✔✔Combustion control and Power density

benefits of PPC HCCI - answer✔✔Injection controlled, less emissions advantage

HCCI is normally a set-up with - answer✔✔port fuel injection and high compression ratio.

PCCI is normally a set-up with - answer✔✔early direct injection forming a rather homogeneous
charge

PPC, partially premixed combustion is a bit less homogeneous than PCCI i.e. - answer✔✔later
injection

LTC is any combustion process giving - answer✔✔low NOx due to low temperature
combustion.

characteristics of PPC - answer✔✔Increased premixing through longer ignition delay, High
amounts cooled EGR are used and Very low NOx and smoke levels

Two subgroups of PPC - answer✔✔With late and early injection

Characteristics of Nissan Modulated Kinetics - answer✔✔Fast mixing due to high swirl ratio +
slow chemistry due to high EGR > yields a more homogeneous charge

Comparison with conventional diesel - answer✔✔Luminous yellow flame in conventional mode
(sootradiation), Almost blue flame in MK mode (more premixed)

load limit for Nissan MK - answer✔✔Fuel injection should be finished before autoignition,
positive ignition dwell

in Nissan MK, there is an Extended ignition delay through - answer✔✔large amounts of cooled
EGR

shorter injection through - answer✔✔Higher injection pressure-Injector with high flow number

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