Patent ID: 7513222

Claim:
An internal combustion engine comprising: a cylinder block having surfaces defining a plurality of combustion chambers, a fuel combustion cycle of the engine to sequentially take place within each of the plurality of combustion chambers; a water injection system having an additive reservoir, a water reservoir, a pump system coupled to the water reservoir and the additive reservoir, and an injection nozzle coupled to the pump system and the combustion chamber; and a controller having a water control module with a plurality of sensor inputs, the water control module to determine water injection moments and water injection durations based on data from the plurality of sensor inputs and to control injection of water from the water reservoir into each of the plurality of combustion chambers during each fuel combustion cycle based on each water injection moment and duration, the water injection system to transfer an additive from the additive reservoir to the water reservoir based on an additive control signal from the water control module.