EGR stands for Exhaust Gas Recirculation valve, this gadget is used in Ford Escape vehicles to control the re-circulation of fumes back to the engine to reduce nitrogen oxide (NOx) emissions hence improving the performance of an engine. The EGR Valve in essence, slows down the rate at which fuel and air is burned by recirculating a portion of the exhaust gas back into the combustion chamber It does this by for instance, lowering the oxygen content in the combustion chamber as well as introducing inert gases hence lowering the combustion temperatures and subsequently the rate at which NOx is formed. Depending on the years and types of models, Ford Escape used several kinds of EGR Valve including the basic Orifice jets and complex valves which respond according to coolant temperature and manifold vacuum. Contemporary EGR systems may also use backpressure transducers to further adjust the EGR flow according to total load of the engine. However, EGR Valves have been found to develop a problem of carbonization making the performance of the vehicle to deteriorate and at the same time affecting the fuel efficiency if not well serviced. In Ford Escape vehicles for instance, routine check up is recommended when it comes to the component of EGR Valve.
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