motherearth je napisal/-a:HOW?

So—you may be wondering—just how does water improve gasoline mileage? After all, plain old H20 won't burn. However, because water doesn't burn . . . the fluid does (in effect) raise the octane of the fuel!

This higher "flash point" produces three specific benefits ( as well as some offshoots). First, because the water cools the gas-air mixture, there is greater potential for expansion (since pressure is directly proportional to temperature). Second, combustion turns the water droplets to vapor . . . which also helps create a pressure bonus ( much as the same substance drives a steam engine).

Finally—and most significantly—the conversion of water to steam consumes heat (at a rate of about 1,100 calories per gram of the liquid) at a very critical instant. This absorption of heat prevents the temperature of combustion from rushing to a sharp peak (as it does in a standard engine) and then dropping rapidly off. Instead, the car's heat increases more slowly, reaches a lower peak, and descends much more gradually. (In addition, the longer overall combustion duration creates more pressure than does a standard engine's cycle.)

SAAB je napisal/-a:Water injection benifits emmission, SAAB says
Water injection is nothing new. During WWII it was used to increase the power of aircraft piston engines. Now Saab has revived the old technology not to boost power, but to maintain full emmission control in a car engine during peak power demands of high-speed operation and acceleration bursts. It has enabled the 2.3-litre Ecopower four-cylinder engine to run at Lambda 1 under all driving conditions