Technician A says a pulse-width modulation of 50% means the valve is energized 50% of the time and de-energized 50% of the time. Technician B says if an EPC pulse-width modulation value is 25%, that means that line pressure is increased by 25%. Who is correct?
A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question

Quizplus · Accepted Answer

Technician A is correct. A pulse-width modulation (PWM) of 50% means the signal is on (energized) for 50% of the time and off (de-energized) for the other 50%. Technician B is incorrect because a 25% PWM does not directly correlate to a 25% increase in line pressure; it depends on the system's design and calibration.

Technician a Says a Pulse-Width Modulation of 50% Means the Valve