water injection system in otto flex-fuel internal combustion engines

摘要

water injection system in internal combustion engines of the otto flex-fuel cycle. The present invention describes a water injection system in an internal combustion engine (1) cycle otto comprising a main tank (2) for storing a first fuel, a second fuel or a mixture of the first and second fuels, a tank. (3) for water storage, a fuel injection valve (9a, 9b, 9c) to inject the fuel present in the main tank (2) into the combustion chamber (10), an indirect injection valve (8) to inject water and a control unit (5) which manages the injection of one of fuel and water into the combustion chamber (10), wherein the system is employed in an engine (1) configured to operate at compression ratios between 13: 1 and 19: 1 within the combustion chamber (10), which consumes a mixture of at least two fuels, and the indirect injection valve (8) is positioned such that the phase change of the injected water occurs within combustion chamber (10), wherein the control unit (5) activates the indirect injection valve (8) for water injection in operating regimes where pre-ignition and / or detonation has been provided. Also described is a water injection method in an engine (1) comprising the water injection system and a pre-ignition and detonation prevention method in an engine (1) comprising the water injection system.