Question 95Motor Plants - 1st Asst/Chief70% to pass
The rate of pressure rise during the period following fuel ignition in a diesel engine is influenced by the length of the ignition delay period and the _______________.
AI Explanation
The correct answer is B) turbulence of the air charge.
The rate of pressure rise during the period following fuel ignition in a diesel engine is influenced by the length of the ignition delay period and the turbulence of the air charge. The turbulence of the air charge affects the air-fuel mixing, which in turn influences the rate of pressure rise. More turbulent air charge leads to better air-fuel mixing and a faster rate of pressure rise.
The other options are incorrect because:
A) Volumetric efficiency is related to the engine's ability to draw in air, not the pressure rise after ignition.
C) Fuel efficiency is a measure of fuel consumption, not the pressure rise dynamics.
D) Valve overlap is a design parameter that affects the engine's breathing, not the pressure rise after ignition.
Related Questions
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