Abstract

A combustion control system adds fluid to the air fuel mixture of the induction system of an internal combustion engine in response to the engine's need for the added fluid to improve combustion, to increase power, to improve efficiency, and to reduce emissions.The combustion control system includes a variable impedance, fluidic control mechanism which produces an impedance to flow through the mechanism which varies in relationship to the pressure differential applied across and to an acceleration of flow through the control mechanism. In one embodiment, the variable impedance flow control mechanism is a vortex chamber, and in another embodiment it is a Venturi. Both embodiments have an outlet which is connected to the induction system above the butterfly valve of the engine.A second variable impedance fluidic control mechanism controls the mixing of air with PCV gases in response to suction in the induction system of the engine; this second control has an outlet which is connected below the butterfly valve.Both variable impedance flow control mechanisms can incorporate shaped inlets for providing a swirl and a controlled choking in the inlets to the flow control mechanisms.The outlet of each variable impedance flow control mechanism also preferably has an inner surface which is configured to produce high turbulence and ultrasonic wave fronts in the fluid flow from the outlet.