US3971351A — Fuel metering system

Claim 1

Independent Claim 244 words

In an internal combustion engine having an exhaust manifold, a cylinder head with intake ports, a distributor, and a fuel pump, the improvement comprising a fuel metering system including: a metering apparatus mounted with the fuel pump including: a housing having a cavity formed therein, said cavity receiving pressurized fuel from the fuel pump; a plurality of cam-actuated valving means in fluid communication with said cavity for distributing charges of fuel from said cavity at predetermined intervals; exhaust gas mixing means mounted adjacent to said housing of said metering apparatus for mixing said charges of fuel with exhaust gas from the exhaust manifold to preheat and vaporize said charges of fuel, said exhaust gas mixing means having needle valve means for adjustably regulating the relative proportions of said charges of fuel with the exhaust gas from the exhaust manifold in proper ratios thereof; fresh air mixing means mounted with said metering apparatus for mixing fresh air with said charges of fuel, said fresh air mixing means having a mixing housing having a mixing chamber formed therein for mixing said vaporized charge of fuel-exhaust gas mixture with fresh air, to provide a combustable charge of fuel directed to the intake ports with the cylinder head; and, means for promoting ease of starting of the internal combustion engine and for providing the necessary boost for the internal combustion engine under high load conditions, said starting means mounted with said metering apparatus and the internal combustion engine.

Claim 2

Dependent Claim 244 words

In an internal combustion engine having an exhaust manifold, a cylinder head with intake ports, a distributor, and a fuel pump, the improvement comprising a fuel metering system including: a metering apparatus mounted with the fuel pump including: a housing having a cavity formed therein, said cavity receiving pressurized fuel from the fuel pump; a plurality of cam-actuated valving means in fluid communication with said cavity for distributing charges of fuel from said cavity at predetermined intervals; exhaust gas mixing means mounted adjacent to said housing of said metering apparatus for mixing said charges of fuel with exhaust gas from the exhaust manifold to preheat and vaporize said charges of fuel, said exhaust gas mixing means having needle valve means for adjustably regulating the relative proportions of said charges of fuel with the exhaust gas from the exhaust manifold in proper ratios thereof; fresh air mixing means mounted with said metering apparatus for mixing fresh air with said charges of fuel, said fresh air mixing means having a mixing housing having a mixing chamber formed therein for mixing said vaporized charge of fuel-exhaust gas mixture with fresh air, to provide a combustable charge of fuel directed to the intake ports with the cylinder head; and, means for promoting ease of starting of the internal combustion engine and for providing the necessary boost for the internal combustion engine under high load conditions, said starting means mounted with said metering apparatus and the internal combustion engine.

Claim 3

Dependent Claim 107 words

The improvement of claim 1, wherein said cam-actuated valving means includes: a plurality of valving members mounted with said housing, each of said valving members being movable from a closed position to an open position and in fluid communication with said cavity; and camming means with said housing for moving said valving members from said closed position to said open position at said predetermined intervals, said camming means having a shaft mounted with said housing and operatively connected to the distributor and a lobed cam rotatively mounted on said shaft for moving said valving members from said closed position to said open position at said predetermined intervals.

Claim 4

Dependent Claim 160 words

The improvement of claim 1 wherein said cam-actuated valving means includes: a plurality of valving members mounted with said housing, each of said valving members being movable from a closed position to an open position and in fluid communication with said cavity; camming means with said housing for moving said valving members from said closed position to said open position at said predetermined intervals; each of said valving members having a valve body of a substantially truncated, conical configuration having an opening formed therein, said opening allowing fuel to flow from said cavity to said exhaust gas mixing means when said valve body is in said open position; a rocker arm mounted with said valve body adjacent the exterior of said housing, said rocker arm actuated by said camming means to rotatively move said valve body from said closed position to said open position; and, return springs to return said valve body from said open position to said closed position.

Claim 5

Dependent Claim 45 words

The improvement of claim 1, wherein said mixing housing further includes: check valve means for allowing intake fresh air into said mixing chamber when said charge of fuel-exhaust gas mixture is therein and for preventing said mixture from flowing outwardly therefrom said check valve means.

Claim 6

Dependent Claim 33 words

The improvement of claim 1, wherein said starting means includes: a chamber having means for storing and regulating the fuel flow into said metering apparatus, said first chamber mounted with said metering apparatus.

Claim 7

Dependent Claim 98 words

The improvement of claim 1, wherein said starting means includes: a housing having a first chamber having means for storing and regulating the flow of incoming fuel; said housing having a second chamber having plunger means movably mounted therewith for withdrawing fuel from said first chamber; and said housing having a third chamber to receive fuel withdrawn from said second chamber and to direct the fuel outwardly from said third chamber of said housing by positive pressure action of said plunger means within said second chamber for distributing fuel simultaneously to all cylinders of the internal combustion engine.

Claim 8

Dependent Claim 43 words

The improvement of claim 6, wherein said starting means further includes: spark advance means for appropriately advancing and retarding the spark timing of the internal combustion engine, said spark advance means being operatively connected with said plunger means to promote ease in starting.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1979-07-27	1980-01-26	1980-07-27	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1983-07-27	1984-01-26	1984-07-27	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1987-07-27	1988-01-26	1988-07-27	$7700.00	Window Closed / Lapsed

Fuel metering system

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