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Interview Question

Graduate Engineer Trainee Interview(Student Candidate) Gurgaon, Haryana (India)

why the torque curve starts to fall after a certain RPM in

  the torque curve?
Answer

Interview Answer

3 Answers

0

because of less time for air intake.

Interview Candidate on Jun 29, 2012
2

After certain speed, volumetric efficiency of engine drops down and engine suffocates as required amount of air doesnt enters combustion chamber, hence torque curve drops.

Satyavrat mane on Oct 20, 2012
0

If a piston moves slowly
from top to bottom with
the inlet valve open, we
would expect the cylinder
to be full of charge at
atmospheric pressure.
This is 100% volumetric
efficiency. Unfortunately,
as engine speed increases
the time available to fill the
cylinder reduces. At 6000
rpm the induction stroke
takes 1/200 of a second and
this affects the volumetric
efficiency.

rahul on Nov 19, 2012

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