Patent US3575152A successfully refreshed from Google Patents.
US3575152A
Expired / Lapsed
US
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Vapor recovery using a plurality of progressively absorbent beds connected in series
Assignee: Motors Liquidation Co
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Filing: 1969-10-01
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Granted: 1971-04-20
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Expires: 1989-10-01
Abstract
Abstract A vapor recovery system for the controlled adsorption and desorption cycling of fuel vapors in an internal combustion engine comprising at least two vapor adsorbent beds connected in series to the fuel bowl of the engine carburetor and to the fuel tank with the adsorbent bed nearest to the source of fuel vapor becoming the most saturated during an adsorption cycle; and, throttle-controlled valve conduits connecting the absorbent beds to the fuel-air induction conduit of the carburetor whereby the least loaded adsorbent bed is purged during low engine loads but, as the throttle is opened to the full open position, all of the adsorbent beds will be purged.
Inventors
- 👤 Joseph T Wentworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:03
CPC Classifications
F; F02; F02M; F02M25/00; F02M25/08; F02M25/089
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
58 words
A method for the recovery of fuel vapors according to claim 1 including the steps of venting fuel vapors from said fuel bowl directly to the fuel-air induction conduit of said carburetor during engine operation and venting fuel vapors from said fuel tank directly to the fuel-air induction conduit of said carburetor during periods of high-speed engine operation.
Claim 2
Independent Claim
133 words
A method of recovering fuel vapor from an engine fuel system, said method comprising the steps of: sequentially storing fuel vapor from the engine fuel system in a plurality of adsorbent beds when the engine is not operating, releasing the stored fuel vapor during engine operation by supplying aeriform fluid to the stored fuel vapor proportionate to the air flow rate into the engine air intake with the fuel vapor release being carried out in the reverse order of sequential fuel vapor storage with the fuel vapor release responsive to air flow progressing from the least loaded adsorbent beds during low air flow to the more loaded adsorbent beds as the air flow increases, and conducting the released vapor to the engine air intake during engine operation and burning the released vapor therein.
Claim 3
Dependent Claim
159 words
A fuel vapor recovery system for an internal combustion engine having a fuel reservoir and a carburetor containing a venturi, a throttle valve restricted throat and a fuel bowl, said system comprising a plurality of fuel vapor storage means, conduit means connecting said fuel vapor storage means with said fuel reservoir and said fuel bowl when the engine is not operating to load said fuel vapor storage means in a fixed vapor storage sequence, vent means connecting said fuel vapor storage means to a source of aeriform fluid to release stored vapor, valved conduit means including distributor valve means connecting said vapor storage means to said venturi of said carburetor when the engine is operating and, linkage means connecting said distributor valve to said throttle valve whereby said distributor valve controls the release of vapor from said fuel vapor storage means in the reverse order of said fixed vapor storage sequence as a function of the throttle valVe setting.
Claim 4
Dependent Claim
139 words
A fuel vapor recovery system according to claim 4 wherein said plurality of fuel vapor storage means comprises at least a first canister and a second canister each containing a quantity of adsorbent material, said conduit means including a conduit connecting said first canister in series with said second canister, with said first canister being connected to said vent means and said second canister positioned to first receive fuel vapor from said fuel reservoir and said fuel bowl when the engine is not in operation, said distributor valve being connected to said throttle valve to control the flow of aeriform fluid through said first canister when the engine is operating at idle and to effect the flow of aeriform fluid through said first canister and said second canister when said throttle valve is opened during higher speed engine operation.
Claim 5
Dependent Claim
88 words
A fuel vapor recovery system according to claim 4 wherein said conduit means includes a pressure relief valve and a vacuum relief valve positioned between said fuel reservoir and said plurality of fuel vapor storage means and wherein said valved conduit means includes a first valve to prevent the flow of fuel vapor to said venturi when the engine is not in operation and a second valve to convey vapor from said fuel bowl to the fuel-air induction conduit of said carburetor when the engine is in operation.
Claim 6
Dependent Claim
185 words
A fuel vapor recovery system for an internal combustion engine having a fuel reservoir and a carburetor with a venturi and throttle valve restricted fuel-air induction conduit and a fuel well, said system comprising a plurality of vapor adsorption bed means, conduit means connecting said bed means in series with respect to each other and at one end to a source of aeriform fluid and at the other end to said fuel reservoir, first valve-controlled conduit means for selectively coupling said fuel well to said conduit means between said fuel reservoir and said adsorption bed means when the engine is not in operation and to said fuel-air induction conduit when the engine is in operation and, second valve-controlled conduit means including a distributor valve operatively connected to said throttle valve for selectively coupling said adsorption bed means via said conduit means to said venturi in accordance with the setting of said throttle valve when the engine is in operation and to block the flow of vapor from said adsorption bed means and said fuel reservoir to said venturi when the engine is not in operation.
Claim 7
Dependent Claim
144 words
A fuel vapor recovery system according to claim 7 wherein said plurality of adsorption bed means includes a first bed means, a second bed means and a third bed means, said conduit means connecting said first bed means at one end to a source of aeriform fluid and, at the other end, to said second bed means, said second bed means to said third bed means and said third bed means to said fuel reservoir, said second valve-controlled conduit means including a first conduit connecting said distributor valve to said conduit means between said first bed means and said second bed means, a second conduit connecting said distributor valve to said conduit means between said second bed means and said third bed means and a third conduit connecting said distributor valve to said conduit means between said third bed means and said fuel reservoir.
Claim 8
Dependent Claim
32 words
A fuel vapor recovery system according to claim 8 wherein said conduit means includes a pressure relief valve and a vacuum relief valve positioned between said fuel reservoir and said third conduit.
Claim 9
Dependent Claim
97 words
A fuel vapor recovery system according to claim 9 further including third valve-controlled conduit means connected to said conduit means between said vapor adsorption bed means and said fuel reservoir and to said second valve-controlled conduit means between said distributor valve and said venturi, said third valve-controlled conduit means including a control valve means to route vapor from said fuel reservoir to said vapor adsorption bed means when the engine iS not in operation and to route vapor from said fuel reservoir to said venturi when the engine is in operation bypassing said vapor adsorption bed means.
References Cited (Backward Citations)
US3352294A
Cited
US3515107A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |