Dual fuel injection structure
AssigneeEnergy Conversions, Inc.
InventorScott P. Jensen
Life of this patent
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Abstract
A fuel injection structure for dual fueled combustion engines having access to the combustion chamber of a cylinder to automatically supplement a liquid fuel with a gaseous fuel, the structure being adapted to supply the gaseous fuel by a programmed electronic control circuit which regulates the operation of fuel injection to be in accord with certain sensed engine operation parameters to determine from said parameters a desired gaseous fuel flow rate and a signal responsive to said parameters actuating a valve to control said flow.
Claims9
In an internal combustion engine having in combination therewith a cylinder having a liquid fuel inlet valve, an exhaust valve and a combustion chamber,
- a gaseous fuel inlet valve,
- a gaseous passage through said gaseous fuel inlet valve into said combustion chamber,
- a gaseous fuel line running to said passage,
- means in said passage normally closing the same,
- a programmed electronic control unit sensing the position of said engine's crankshaft during that time of that part of a compression stroke in said cylinder to indicate that said exhaust valve is closed,
- means energized by said electronic control unit upon said electronic control unit sensing a closing of said exhaust valve causing said means in said passage to open said passage into said combustion chamber to admit gaseous fuel therein, and
- a temperature responsive sensing means in connection with said gaseous fuel line downstream of said gaseous fuel inlet valve.
An internal combustion engine having in combination a cylinder having a liquid fuel inlet valve, an exhaust valve and a combustion chamber,
- a gaseous fuel inlet valve having a passage communicating with said combustion chamber,
- said cylinder embodying a fuel injector and an exhaust valve,
- said fuel injector and exhaust valve being sequentially operated by a cam actuated rocker arm,
- a programmed electronic control unit sensing the appropriate position of the engine crankshaft as to the position of the crankshaft in said combustion chamber of said cylinder to indicate the exhaust valve as closed in order to energize said gaseous inlet valve and open said gaseous passage, and
- a temperature responsive sensing means in connection with said gaseous fuel inlet valve passage.
Dependencies are inferred from the claim text.