General Studies · Emission Control Systems
How does the Exhaust Gas Recirculation (EGR) valve help control NOx formation during combustion?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1By advancing the fuel injection timing
- 2By raising the temperature of the incoming intake air
- 3By recirculating a portion of exhaust gas into the intake air-fuel mixture to lower peak combustion temperatures✓
- 4By completely blocking the exhaust flow under high loads
Correct answer
By recirculating a portion of exhaust gas into the intake air-fuel mixture to lower peak combustion temperatures
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