F - Mech Eng,Light,Heat,Weapons – 02 – D
Patent
F - Mech Eng,Light,Heat,Weapons
02
D
F02D 11/08 (2006.01) F02D 41/14 (2006.01)
Patent
CA 2080909
2080909 9116531 PCTABS00008 A fuel supply control for an internal combustion engine designed to run on gaseous fuel (LPG or CNG) utilizes a feddback loop from a lambda sensor in the exhaust gases to a moving coil (82) mounted on a diaphragm (34) of a diaphragm-actuated valve (24) controlling the flow of gaseous fuel to the engine. The coil (82) is similar to the speaker coil of an audio speaker, and moves concentrically of a fixed permanent ring magnet (86) to impart a variable bias on the diaphragm (34) in accordance with the oxygen content of the exhaust gas stream as sensed by the lambda sensor, to control the fuel or air-and-fuel supply to the engine in accordance with desired engine operating parameters. The control has a sufficiently rapid and positive response that it can maintain the free oxygen content in the exhaust gases at substantially 2 % for continuous operation of a catalytic exhaust purifier at or nearly at optimum efficiency.
Bedford Timothy James
Kirkland John William
Borden Ladner Gervais Llp
Green Power International Limited
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