When does an energized diesel engine cranking motor produce peak torque?
A) At close to stall RPM
B) At the equivalent of 225 engine rpm
C) At maximum cranking motor rpm
D) After 15-seconds of cranking

Question

Quizplus · Accepted Answer

An energized diesel engine cranking motor produces peak torque at close to stall RPM because this is when the electrical current through the motor is highest, generating the maximum magnetic force needed for peak torque.

When Does an Energized Diesel Engine Cranking Motor Produce Peak