Abstract: A fluid injection system for an internal combustion engine, including both spark-ignition and compression-ignition engines, includes a nozzle for injecting a finely divided spray of fluid, such as water, a water solution, or other combustion enhancing fluid, into the intake air of the engine in response to a flow of atomizing air. The nozzle is connected to a fluid supply and to the outlet an air injection pump that is connected to an electric drive motor. The drive motor is controlled by an electronic control circuit to provide the atomizing air to the nozzle in response to the fuel flow to the engine and in response to one or more engine parameters including parameters provided by a temperature sensor, a throttle position sensor, and/or a detonation sensor.

Abstract: 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 an air compressor for supplying air to the nozzle at a rate in direct proportion to engine speed to induce the flow of fluid through the nozzle. A pressure responsive flow control device is provided that is responsive to engine load, as manifested by the pressure in the intake manifold for controlling the flow of air to the nozzle, and therefore the discharge of fluid from the nozzle. The pressure of air supplied by the compressor to the nozzle is varied in response to variations of the pressure in the exhaust manifold of the engine. As a result, the flow of atomizing air to the nozzle, and therefore the rate of fluid injection, is varied in response to variations in engine speed and in engine load.

Abstract: A fluid injection system for a turbocharged 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 a compressor which receives the air/fuel mixture from the carburetor and supplies the mixture to the nozzle to induce the flow of fluid through the nozzle. The compressor is driven by the flow of exhaust gases from the exhaust manifold so that the flow of atomizing air to the nozzle, and therefore the rate of fluid injection, is varied in response to variations in engine load.

Abstract: 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.

Abstract: 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 compressor for supplying air to the nozzle to induce the flow of fluid through the nozzle. A pressure responsive flow control device is provided that is responsive to engine load, as manifested by the pressure in the intake manifold, for controlling the flow of air to the nozzle, and therefore the discharge of fluid from the nozzle. As a result, the flow of atomizing air to the nozzle, and therefore the rate of fluid injection, is varied in response to variations in engine load.

Abstract: A system for injecting fluid into an internal combustion engine, in which a carburetor supplies an air/fuel mixture to the engine in response to the demand on the engine, and a nozzle receives the fluid and a portion of the mixture and injects the fluid and the mixture into the carburetor at a rate proportional to the flow rate of the mixture. A supercharger receives the mixture from the carburetor and increases the pressure and flow rate of the mixture in response to a predetermined demand on the engine before the mixture is introduced to the engine.

Abstract: A fluid injection system for an internal combustion engine such as a spark-ignition or compression-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 connected to and controlled by an electronic circuit that includes a pick-up coupled to the ignition system of the engine. The electronic circuit responds to spark plug firing rate, which is proportional to engine speed, and to the amplitude of the voltage across the spark plug gap, which is proportional to engine load, and varies, respectively, the pump stroke rate and the pump stroke length accordingly. As a result, the flow of atomizing air to the nozzle and therefore the rate and magnitude of water injection is responsive to engine speed and load.

Abstract: A fluid injection system for an internal combustion engine such as 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 an inductive pick-up coupled to the ignition system of the engine and a pressure responsive sensor that is coupled to the intake manifold. The electronic circuit thus operates the pump in response to engine speed by virtue of its connection to the ignition system through the inductive pick-up and in response to engine load by virtue of its connection to the intake manifold through the pressure responsive sensor. As a result, the flow of atomizing air to the nozzle and therefore the rate and magnitude of water injection is responsive to engine speed and engine load.

Abstract: A fluid injection system for an internal combustion engine such as a spark-ignition or compression-ignition enginein 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 connected to the intake manifold of the engine and to an electronic circuit that includes an inductive pick-up coupled to the ignition system of the engine. The pump operates in response to engine speed by virtue of its connection to the ignition system and in response to engine load by virtue of its connection to the intake manifold. As a result, the flow of atomizing air to the nozzle and therefore the rate and magnitude of water injection is responsive to engine speed and engine load.