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To Make A More Efficient Engine, Just Add Water

Discover how the water injection system can enhance internal combustion engine efficiency by cooling and improving fuel usage.

Credit: Kalabi Yau/Shutterstock

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The internal combustion engine has always been a work in progress. Ever since we first began putting them in cars over a century ago, engineers have come up with ever more complex ways of wringing more horsepower and greater fuel efficiency from them. One company says it’s found a surprising means of making our engines even more efficient: Just add water.

The design comes from Bosch, a German engineering firm. According to their press release, a portion of the fuel that gets injected into turbocharged engines never combusts, instead it cools the engine and prevent it from overheating. Their WaterBoost system replaces this gasoline with water via a separate injector in the intake port.

Internal combustion engines combine fuel and air inside a cylinder, where a spark plug ignites the mixture and the ensuing explosion forces a piston down, driving the crankshaft and turning the wheels. This process creates a ...

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