US4620510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for improving the efficiency of internal combustion engines and fluid pumping devices
Assignee: FUELING ADVANCED TECHNOLOGY Inc
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Filing: 1983-10-24
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Granted: 1986-11-04
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Expires: 2003-10-24
Abstract
Abstract This invention is directed to a novel camshaft for engine timing. The cam positions of the camshaft include secondary lobes in conjunction with normal primary lobes. The secondary lobes are positioned so that they precede their associated primary lobe during camshaft rotation. The secondary lobes cause an associated valve to open slightly and close completely prior to the normally expected valve opening caused by the primary lobe. This slight opening and closing creates a shock wave that aids the atomizing air and fuel mixing in the intake system prior to normal intake valve opening and enhances the scavenging of combustion gases during the exhaust cycle.
Inventors
- 👤 James J. Feuling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:05
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/02; F01L1/04; F01L1/08; F02; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F02B2075/027; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2101
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
108 words
An improved method of scavenging exhaust gases from an internal combustion engine, following the power cycle said engine comprising at least one cylinder with intake and exhaust valve means and exhaust conduit means comprising the steps of: creating a sonic shock wave in said exhaust conduit means intermediate the last one half of said power cycle prior to the normal opening of said exhaust valve means during a predetermined engine timing sequence; opening said exhaust valve means according to its normal predetermined engine timing sequence; and producing a negative sonic shock wave from said sonic shock wave which reaches said exhaust valve means during its normal open condition.
Claim 2
Dependent Claim
108 words
An improved method of scavenging exhaust gases from an internal combustion engine, following the power cycle said engine comprising at least one cylinder with intake and exhaust valve means and exhaust conduit means comprising the steps of: creating a sonic shock wave in said exhaust conduit means intermediate the last one half of said power cycle prior to the normal opening of said exhaust valve means during a predetermined engine timing sequence; opening said exhaust valve means according to its normal predetermined engine timing sequence; and producing a negative sonic shock wave from said sonic shock wave which reaches said exhaust valve means during its normal open condition.
Claim 3
Dependent Claim
40 words
The method as defined in claim 1 wherein said sonic shock wave is created by a first opening of said exhaust valve means prior to said opening of said exhaust valve means according to its normal predetermined engine timing sequence.
Claim 4
Dependent Claim
123 words
An improved method of mixing the incoming gases of combustion into the cylinder of an internal combustion engine and removing the combusted gases therefrom during an exhaust cycle, said engine having at least one cylinder with intake and exhaust valve means and an intake conduit means comprising the steps of: creating a positive sonic shock wave in said intake conduit means during the first one quarter of said exhaust cycle prior to the opening of said intake valve means during a predetermined engine timing sequence; and opening said intake valve means according to its normal predetermined engine timing sequence, said positive sonic shock wave acting to atomize fuel remaining in said intake conduit means prior to the normal opening of the intake valve.
Claim 5
Dependent Claim
123 words
An improved method of mixing the incoming gases of combustion into the cylinder of an internal combustion engine and removing the combusted gases therefrom during an exhaust cycle, said engine having at least one cylinder with intake and exhaust valve means and an intake conduit means comprising the steps of: creating a positive sonic shock wave in said intake conduit means during the first one quarter of said exhaust cycle prior to the opening of said intake valve means during a predetermined engine timing sequence; and opening said intake valve means according to its normal predetermined engine timing sequence, said positive sonic shock wave acting to atomize fuel remaining in said intake conduit means prior to the normal opening of the intake valve.
Claim 6
Dependent Claim
42 words
The method as defined in claim 3 wherein said sonic shock wave is created by a first opening and closing of said intake valve means prior to said opening of said intake valve means according to its normal predetermined engine timing sequence.
Claim 7
Independent Claim
218 words
A method for improving the efficiency of an internal combustion engine having power and exhaust operational cycles at least one cylinder with intake and exhaust valve means and intake and exhaust conduit means comprising the steps of: creating a first positive sonic shock wave in said intake conduit means during the first one quarter of said exhaust cycle prior to the normal opening of said intake valve means according to a predetermined engine timing sequence; opening said intake valve means according to said predetermined engine timing sequence; creating a second sonic shock wave in said exhaust conduit means during the last one half of said power cycle prior to the opening of said exhaust valve means according to a predetermined engine timing sequence; and opening said exhaust valve means according to said predetermined engine timing sequence; said first sonic shock wave causes droplets of fuel collected in the intake conduit means to be atomized prior to the air and fuel mixture being pulled through said intake conduit into one of said at least one cylinder and a second negative sonic shock wave produced by said second sonic shock wave reaches said exhaust valve means during its normal predetermined opening, causing the gases of combustion to be aided in their removal from said cylinder into said exhaust conduit means.
Claim 8
Independent Claim
218 words
A method for improving the efficiency of an internal combustion engine having power and exhaust operational cycles at least one cylinder with intake and exhaust valve means and intake and exhaust conduit means comprising the steps of: creating a first positive sonic shock wave in said intake conduit means during the first one quarter of said exhaust cycle prior to the normal opening of said intake valve means according to a predetermined engine timing sequence; opening said intake valve means according to said predetermined engine timing sequence; creating a second sonic shock wave in said exhaust conduit means during the last one half of said power cycle prior to the opening of said exhaust valve means according to a predetermined engine timing sequence; and opening said exhaust valve means according to said predetermined engine timing sequence; said first sonic shock wave causes droplets of fuel collected in the intake conduit means to be atomized prior to the air and fuel mixture being pulled through said intake conduit into one of said at least one cylinder and a second negative sonic shock wave produced by said second sonic shock wave reaches said exhaust valve means during its normal predetermined opening, causing the gases of combustion to be aided in their removal from said cylinder into said exhaust conduit means.
Claim 9
Dependent Claim
40 words
The method as defined in claim 5 wherein said first sonic shock wave is created by an opening of said intake valve means prior to said opening of said intake valve means according to said normal predetermined engine timing sequence.
Claim 10
Dependent Claim
40 words
The method as defined in claim 5 wherein said second sonic shock wave is created by an opening of said exhaust valve means prior to said opening of said exhaust valve means according to said normal predetermined engine timing sequence.
Claim 11
Dependent Claim
73 words
The method as defined in claim 5 wherein said first sonic shock wave is created by an opening of said intake valve means prior to said opening of said intake valve means according to said normal predetermined engine timing sequence and said second sonic shock wave is created by an opening of said exhaust valve means prior to said opening of said exhaust valve means according to said normal predetermined engine timing sequence.
Claim 12
Dependent Claim
35 words
The method as defined in claim 5 wherein said first positive sonic shock wave is initiated substantially at the same time as the opening of said exhaust valve according to its predetermined engine timing sequence.
Claim 13
Dependent Claim
147 words
Means for improving the operating efficiency of an internal combustion engine having power and exhaust cycles comprising: at least one cylinder; intake and exhaust conduits; intake and exhaust valve means associated with said cylinder and said conduits for controlling the flow of a fuel and air mixture into said cylinder and removal of the exhaust gases therefrom; a timing means for operating said valve means at a predetermined time between open and closed positions; and means for creating a positive sonic shock wave in said exhaust conduit during the last one half of said power cycle prior to the normal opening of said exhaust valve by said timing means, whereby said positive sonic wave travels the length of the exhaust conduit and returns to said exhaust valve means as a negative shock wave during the time said timing means operates said exhaust valve in an open condition.
Claim 14
Dependent Claim
147 words
Means for improving the operating efficiency of an internal combustion engine having power and exhaust cycles comprising: at least one cylinder; intake and exhaust conduits; intake and exhaust valve means associated with said cylinder and said conduits for controlling the flow of a fuel and air mixture into said cylinder and removal of the exhaust gases therefrom; a timing means for operating said valve means at a predetermined time between open and closed positions; and means for creating a positive sonic shock wave in said exhaust conduit during the last one half of said power cycle prior to the normal opening of said exhaust valve by said timing means, whereby said positive sonic wave travels the length of the exhaust conduit and returns to said exhaust valve means as a negative shock wave during the time said timing means operates said exhaust valve in an open condition.
Claim 15
Dependent Claim
63 words
The invention as defined in claim 10 additionally comprises means for creating a positive sonic shock wave in said intake conduit means during the first one quarter of the exhaust cycle prior to the opening of said intake valve by said timing means, whereby said positive sonic wave travels in said intake conduit, thereby acting to atomize fuel remaining in said intake conduit.
Claim 16
Dependent Claim
76 words
The invention as defined in claim 10 wherein said timing means comprises a camshaft having separately positioned primary lobes for operating said intake and exhaust valve means at a predetermined time and the exhaust cam lobe includes a secondary lobe positioned adjacent thereto for operating said exhaust valve means during the last one half of the power cycle prior to operation by the primary lobe, whereby said positive sonic wave is created in said exhaust conduit.
Claim 17
Dependent Claim
35 words
The invention as defined in claim 12 wherein said primary lobe causes said exhaust valve means to open to a greater degree and stay open for a longer span of time than said secondary lobe.
Claim 18
Dependent Claim
79 words
The invention as defined in claim 11 wherein said timing means comprises a camshaft having separately positioned primary lobes for operating said intake and exhaust valve means at a predetermined time and the intake lobe includes a secondary lobe positioned adjacent thereto for opening and closing said intake valve means during the first one quarter of the exhaust cycle prior to opening and closing by said primary lobe, whereby said positive sonic wave is created in said intake conduit.
Claim 19
Dependent Claim
92 words
The invention as defined in claim 11 wherein said timing means comprises a camshaft having separately positioned primary lobes for operating said intake and exhaust valve means at a predetermined time and the exhaust and intake cam lobes include a secondary lobe positioned adjacent thereto for operating said exhaust and intake valve means during the last one half of the power cycle and the first one quarter of the exhaust cycle respectively prior to operation by the primary lobe, whereby said positive sonic waves are created in said exhaust and intake conduits.
Claim 20
Dependent Claim
34 words
The invention as defined in claim 15 wherein said primary lobes causes said valve means to open to a greater degree and stay open for a longer span of time than said secondary lobes.
Claim 21
Dependent Claim
122 words
Means for improving the operating efficiency of an internal combustion engine having at least one cylinder comprising: intake and exhaust conduits; intake and exhaust valve means associated with said at least one cylinder and said conduits for controlling the flow of a fuel and air mixture into said cylinder and removal of the exhaust gases therefrom; a timing means for operating said valve means at a predetermined time between open and closed positions; and means for creating a positive sonic shock wave in said intake conduit prior to the normal opening of said intake valve means, whereby said positive sonic wave travels into the intake conduit acting to atomize fuel droplets therein and on the under side of said intake valve means.
Claim 22
Dependent Claim
122 words
Means for improving the operating efficiency of an internal combustion engine having at least one cylinder comprising: intake and exhaust conduits; intake and exhaust valve means associated with said at least one cylinder and said conduits for controlling the flow of a fuel and air mixture into said cylinder and removal of the exhaust gases therefrom; a timing means for operating said valve means at a predetermined time between open and closed positions; and means for creating a positive sonic shock wave in said intake conduit prior to the normal opening of said intake valve means, whereby said positive sonic wave travels into the intake conduit acting to atomize fuel droplets therein and on the under side of said intake valve means.
Claim 23
Dependent Claim
83 words
The invention as defined in claim 16 wherein said timing means comprises a camshaft having separately positioned primary lobes for operating said intake and exhaust valve means at a predetermined time and the intake cam lobe includes a secondary lobe positioned adjacent thereto for operating said intake valve means open substantially simultaneously with the opening of the exhaust valve and then closing said intake valve prior to operation by the primary lobe, whereby said positive sonic wave is created in said intake conduit.
Claim 24
Dependent Claim
35 words
The invention as defined in claim 18 wherein said primary lobe causes said intake valve means to open to a greater degree and stay open for a longer span of time then said secondary lobe.
Claim 25
Dependent Claim
43 words
The invention as defined in claim 12 wherein a secondary lobe is associated with said intake primary lobe which operates said intake valve to partially open and then closes at a time slightly after said exhaust valve is opened by said primary lobe.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-11-03 | 1990-05-05 | 1990-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-03 | 1994-05-05 | 1994-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-03 | 1998-05-05 | 1998-11-04 | $7700.00 | Window Closed / Lapsed |