Which type of EGR valve requires a positive exhaust system pressure to operate?
A) Negative backpressure
B) Digital
C) Linear
D) Positive backpressure

Question

Quizplus · Accepted Answer

A positive backpressure EGR valve requires a positive pressure in the exhaust system to operate. This type of valve is commonly found in newer diesel engines with diesel particulate filters (DPF) and selective catalytic reduction (SCR) systems, which require a positive pressure to function properly.

Which Type of EGR Valve Requires a Positive Exhaust System