How does EGR valve reduce temperature?
EGR systems recycle a portion of the exhaust gas back into the combustion chamber, where it combines with fresh intake air. This lowers the amount of Oxygen and increases the water vapour content to the combustion mixture which reduces the peak combustion temperature.
What is the purpose of a EGR temperature sensor?
The EGR temperature sensor is an engine management sensor that is part of the EGR system. It works together with the EGR solenoid to control the flow of the EGR system. The sensor is installed in between the exhaust and intake manifold, and monitors the temperature of the exhaust gases.
What are the signs of an open EGR valve?
An open EGR valve allows exhaust gases getting into the engine but at the wrong time. Common warning signs to look for are: Rough idling. The engine does not kick off. Stalling and hesitation of the engine. The check engine light coming on.
Why is my intake manifold temperature sensor not working?
One reason is the Powertrain Control Modules (PCM) ability to calculate the amount of EGR flow (exhaust gas recirculation) into the engine by measuring the amount of temperature rise inside the intake manifold during EGR system operation.
How does the EGR valve work in an engine?
The working mechanism involves creating a diluted air-fuel mixture by allowing a metered amount of exhaust gas into the engine. Such a mixture lowers the combustion temperature by up to 300°F by burning more slowly. The EGR valve is the main component of the EGR system. It regulates the amount of exhaust gas passing into the engine intake manifold.
How often should I Check my EGR valve?
Most countries require a vehicle’s emission test every six months. Check the EGR system if your car fails the test. You already know that all problems occur due to two reasons – the EGR valve stuck open or it stuck closed. So, it’s possible to divide the symptoms of a bad EGR valve into two categories: