Question 98Motor Plants - Assistant Engineer70% 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 C) 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 mixing of the fuel and air, which in turn influences the rate of combustion and the rate of pressure rise. Increased turbulence leads to better fuel-air mixing, resulting in a faster rate of pressure rise. The other options, such as valve overlap (A), volumetric efficiency (B), and fuel efficiency (D), do not directly affect the rate of pressure rise in the same way as the turbulence of the air charge.
Related Questions
#96 For a given fuel, a change in the compression ratio will affect the ignition lag by which of the listed means? #97 Which area of the indicator diagram illustrated, indicates the ignition delay period in a diesel engine cylinder? Illustration MO-0033 #99 The pressure in an operating diesel engine cylinder continues to rise for a short period after the piston passes top dead center as a result of the_______________. #100 On the cylinder indicator diagram illustrated, the maximum rise in pressure occurs during the period labeled as_______________. Illustration MO-0033 #101 Which statement about diesel engine combustion is true?