Bruce Nunnally Posted February 14, 2015 Report Share Posted February 14, 2015 Water injection is spraying water into the incoming air or fuel-air mixture, or directly into the cylinder, in order to cool certain parts of the induction system where "hot points" could produce premature ignition (ref wikipedia). Often in street car systems a mix of methanol and water is used, sometimes in the form of window washer fluid, because methanol complements the fuel air mixture as well as provides a cooling effect. The process is said to yield a number of positive effects. For one, it reduces knocking. For another, it can make more out of lower-octane fuel where higher octane isn't available. It also can control the adverse effects of higher ambient temperature on the combustion process. But most of all, it increases output and reduce fuel consumption by around eight percent. BMW is using a system on an upcoming pace car; Autoblog is suggesting they are proving it out for a future production application. Read more: http://www.autoblog.com/2015/02/13/bmw-reveals-m4-safety-car-with-innovating-water-injection-system/ Quote Bruce 2016 Cadillac ATS-V gray/black Follow me on: Twitter Instagram Youtube Link to comment Share on other sites More sharing options...
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