False air

This article or the following section is not adequately provided with supporting documents ( e.g. individual evidence ). Information without sufficient evidence could be removed soon. Please help Wikipedia by researching the information and including good evidence.

As secondary air (also secondary air called) is known in the art and v. a. of process engineering, air that is added to a controlled flow of air in an uncontrolled manner, so that there is more air than specified or previously measured or the like, or that air that was controlled escapes from a process in an uncontrolled manner, with the undesirable effect that thus a mixture composition and u. U. change other process parameters.

False air is a problem in motor vehicle engines , for example , when seals between carburetors or throttle valves (e.g. paper seals , O-rings or rubber parts) and the engine fail, and when a gas-air mixture is subsequently supplied to the engine during intake that shows proportionally too much air or too little fuel for stoichiometric combustion (wrong air ratio lambda ).

This false air behavior can lead to malfunctions, poor combustion, high consumption and even complete inoperability.

In the past, a typical case of damage to highly stressed two-stroke engines was often that pistons burn out if the ingress of false air remained unnoticed for a long time and had led to combustion temperatures that were far too high.

False air can also become a problem as an uncontrolled leakage of air, e.g. B. in the operation of mills in cement works , when process air from faulty, defective or poorly maintained sealing systems escapes uncontrollably in large quantities and entrains dust . In addition to increased energy consumption and reduced performance, this can also cause environmental damage , which can even lead to the prohibition of continued operation.