A new technology from Bosch is said to reduce vehicle fuel consumption by 13%. It works by spraying a fine vapor of distilled water into the intake duct in the engine. The system is used in the new BMW M4 GTS.
An advanced combustion engine currently wastes around a fifth of its fuel, which is used to cool the engine before combustion. Cooling the engine reduces engine knocking, which delivers greater power. Bosch’s new technology replaces this with water; before the fuel ignites, a fine mist of water is injected into the intake duct. The water’s high heat of vaporization provides effective cooling, meaning that fuel is only used during the combustion process.
September 7, 2016