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AssigneePropane Carburetion Systems, Inc.
InventorWilliam H. Batchelor
Estimating the term…
A control system for a dual fuel engine using primary diesel fuel and supplemental gas fuel such as propane or natural gas includes a control valve that controls supplemental fuel mixing with intake air by using an air deflectable member that controls the position of a valve controlling the admission of supplemental gas to the engine intake airstream. A damper is provided on the air flow responsive member to improve valve operation and a lost motion connection is provided between the air flow responsive member and the control valve element to permit independent movement of the elements. Normal flow of supplemental fuel to the control valve is further modulated in response to certain engine operating conditions using an engine condition comparator that generates a control signal used by the supplemental fuel pressure regulator to further modulate the supply of supplemental fuel to the intake airstream. The system includes a supplemental fuel shut-off system that restores full primary diesel fuel flow to the engine when the supply of supplemental fuel approaches depletion.
A supplemental gas fuel control system for a dual fuel supply system for an internal combustion engine having an air intake duct for conveying an intake airstream to the engine, an exhaust duct, and using a primary liquid fuel, the control system comprising a pressure regulator including a movable regulator valve positionable for controlling flow of supplemental gas fuel from a high pressure source to the intake airstream of the engine within said air intake duct, the position of the regulator valve normally governed by engine inlet airstream flow conditions, said flow conditions communicated normally to the pressure regulator by using an air intake duct suction pressure signal acting on a controller for the regulator valve;
In a supplemental gas fuel control system for a dual fuel supply system for an internal combustion engine having an air intake duct for conveying an intake airstream to the engine, an exhaust duct, and a primary liquid fuel supply system the control system including a pressure regulator including a regulator valve for controlling flow of supplemental gas fuel from a high pressure source to the intake airstream of the engine within said air intake duct, the improvement comprising:
A method of controlling the supply of supplemental gas fuel to an internal combustion engine including a primary liquid fuel supply, means for controlling the liquid fuel supply in response to engine speed demand, air intake and exhaust gas ducts for the engine for conveying an intake airstream and exhaust gases to and from the engine, respectively, a pressure regulator valve including a movable valve element for controlling supply of supplemental gas fuel to the engine, a gas fuel mixer valve in the intake air duct for mixing the regulated gas fuel into the intake airstream in proportion to a rate of liquid fuel supply to the engine;
Dependencies are inferred from the claim text.