Over recent years, climate change has been a big concern in the UK. Regulations are becoming increasingly strict to combat the amount of GHG emissions emitted from road transport. Car manufacturers are having to make adaptations to the designs of their vehicles to meet the stringent limits. One method of reducing exhaust emissions is the use of after-treatment devices.
But, what is an EGR? Air from the environment, mostly a combination of Oxygen and Nitrogen, combines with fuel and ignites inside the combustion chamber, temperatures increase and produce NOx emissions. The EGR system works by returning a small portion of exhaust gas to the engine's combustion chambers through the intake manifold, lowering combustion temperatures and therefore reducing the amount of NOx emitted.
It connects the exhaust manifold to the intake manifold and is controlled by either a vacuum or a built-in electric step motor. The EGR valve connects the exhaust manifold to the intake manifold. The EGR valve is normally closed. There is no EGR flow when the engine is cold, at idle, or during hard acceleration. What code will a bad EGR valve throw? The EGR system redirects a small amount of exhaust gases back into the intake. Does removing EGR increase power?
Some of the most common reasons to remove an EGR valve are to increase horsepower, lower engine operating temperatures and improve fuel efficiency.
What happens if EGR valve is blocked? If the EGR valve is clogged or completely blocked off it can longer re-burn harmful emissions in the combustion chamber.
The NOx emissions will flow unregulated through the combustion chamber and out of the exhaust pipe. The excessive NOx emissions will show up during a smog test and cause a failure.
What happens if you remove the EGR valve? So what happens when you remove the EGR? The fuel will no longer be efficient and the emissions of your car will increase. A damaged EVR can cause different damages and problems with the slow and operation of the EGR system and it will affect performance.
Some of the symptoms that you might notice are:. When you notice any of these symptoms, it is important to take your vehicle to professionals in order to avoid more damage. EGR valve uses exhaust gas to cool the combustion chamber which makes it cooler because it does not consume much oxygen.
When your EGR valve is faulty, the emission will increase which might cause overheating. Once the engine is overheating, it is only a matter of time before it destroys the engine. The piston might seize or expand because of high temperature. It might also destroy some other components like valves and crankshaft. It is not advisable to drive with a faulty EGR, be patient and let it be fixed.
The exhaust gas is made up of emissions such as hydrocarbons, carbon monoxide, particulate matter, and nitrogen oxides. Its main function is reducing emissions. Bosch shares compound disc brake advice October 19, Autodata runs through a Jaguar E-Pace fault October 18, Autodata shares a Kia Sportage fix October 15, How to replace rear brake pads on a Hyundai i40 October 14, How to install the timing belt on a Fiat October 13, Copyright Hamerville Media Group.
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