How Do You Clean An Egr Valve
What Does an EGR Valve Practise?
by Paul Novak
the powerful engine image by kuhar from <a href='http://www.fotolia.com'>Fotolia.com</a>
In the early 1970s, automobile manufacturers began equipping their vehicles with EGR (exhaust gas recirculation) valves to reduce the levels of pollutants created by their vehicles. At high temperatures, oxygen and nitrogen combine to form nitrogen oxide, which is considered ane of the main components of smog. EGR valves assist to reduce the amount of nitrogen oxide produced by car engines past lowering the temperature of the combustion process in an engine.
Basics
Nitrogen oxide is a noxious gas and is 1 of the main components plant in smog. It is produced during the combustion procedure in an motorcar when temperatures in the combustion chamber exceed 2,500 degrees.The EGR valve works to lower the combustion temperatures in an engine by introducing a controlled amount of exhaust gases into the engine cylinders. These exhaust gases cannot exist burned again and merge with the fuel and air mixture that enters into a cylinder, which chemically lowers the temperature at which the fuel and air mixture burns, reducing the production of nitrogen oxides.
Functioning
The EGR valve has an inlet tube that is continued to the engine's exhaust arrangement and an outlet tube that is connected to the intake manifold. The principal trunk of the unit contains a valve which opens nether sure weather condition to allow a sure corporeality of frazzle gas into the intake manifold, where it and so mixes with the fuel and air mixture and cools the combustion process.
Vacuum Control
EGR valves on older vehicles manufactured before 1981 are operated according to the amount of vacuum created by the engine under different operating conditions. These units have a vacuum hose fastened to them which connects to the intake manifold and provides the ported vacuum necessary to operate the valve. As the throttle is opened more than vacuum is created, which causes the valve to open and introduce frazzle gases into the intake manifold. These early EGR systems as well used a thermal switch which prevented the vacuum from operating the EGR valve until the engine reached normal operating temperature.
Electronic Control
Newer vehicles manufactured after 1981 use vacuum and electronic signals to control the operation of the EGR valve. The EGR valve is connected to a vacuum source from the engine and also has i or more than wires connecting it to the vehicle'southward computer. The computer uses sensors to monitor the performance of the engine and sends signals to solenoids within the EGR valve to more than precisely control the valve'south performance than vacuum operation lonely tin. This allows the EGR valve to operate much more efficiently and further reduce the production of nitrogen oxides.
EGR Failure
When EGR valves fail, the system is unable to properly introduce exhaust gases into the fuel and air mixture, which causes the temperature inside the combustion chambers to increase. This temperature increment can crusade pre-ignition, knocking and pinging, and over-product of nitrogen oxide. To preclude this, mod vehicles use computer controls which annotation when the EGR valve is no longer calculation exhaust gases to the fuel and air mixtures. The computer so reduces the amount of ignition accelerate, which in turn slows down the combustion procedure, only at the price of reducing performance and fuel mileage. When the EGR valve fails, a code is fix in the vehicle'southward figurer, which causes the check engine light to come up on. This lawmaking likewise allows automobile technicians to quickly determine the cause of the problem.
References
Writer Bio
Paul Novak is a freelance author specializing in Web content creation. He has owned his own business organization for seven years, and has for 10 years written on a variety of subjects from politics to the paranormal. His manufactures critical of paranormal claims have appeared in "Xproject" magazine and "Ufoevidence."
More Articles
Source: https://itstillruns.com/egr-valve-do-6696830.html
Posted by: riojasnoremse.blogspot.com
0 Response to "How Do You Clean An Egr Valve"
Post a Comment