Fuel detonation-responsive fluid injection system for an internal combustion engine

摘要

A fluid injection system for an internal combustion engine such as a spark-ignition engine in which an injection nozzle injects a finely divided spray of fluid, such as water or a water solution, into the engine in response to a flow of atomizing air. The nozzle is connected to a fluid supply reservoir and to the outlet line of an air-injection pump that is connected to an electronic control circuit which includes a detonation sensor coupled to the intake manifold. The electronic circuit operates the pump in response to detonation of the fuel charge in the combustion chamber by virtue of its connection to the detonation sensor. As a result, the flow of atomizing air to the nozzle and therefore the rate and magnitude of water injection is responsive to fuel detonation. An inductive pickup can also be provided that is coupled to the ignition system of the engine and connected to the electronic circuit so that the pump is also operated in response to engine speed.