US4197140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for cleaning internal combustion engine cylinders
Assignee: Individual
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Filing: 1978-11-13
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Granted: 1980-04-08
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Expires: 1998-11-13
Abstract
Abstract An improved process for cleaning internal combustion cylinders including disconnecting the ignition mechanisms of preselected cylinders, introducing a combustible cleaning solvent mixture into the fuel intake, running the engine for a period of time, then repeating the process until each cylinder has been treated while its associated ignition mechanism is inoperative and finally running the engine to combust and exhaust all of the cleaning solvent mixture.
Inventors
- 👤 John C. Swan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:12
CPC Classifications
F; F02; F02B; F02B77/00; F02B77/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
260 words
A method for cleaning the interior of internal combustion engine cylinders comprising: rendering the ignition mechanisms of a first predetermined group of cylinders inoperative, said first group numbering one-half of the total number of cylinders and has its members arranged so as to provide for a minimum of disruptive forces and torques upon the engine block caused by the operation of the engine with the ignition mechanisms of said first group of cylinders being inoperative; operating the engine at a relatively constant engine speed of approximately 2500 revolutions per minute; introducing a combustible solvent mixture directly into the carburetor of the engine, said mixture being comprised of kerosene and acetone with the percentage by volume of kerosene in said mixture being between fifty and sixty-seven percent, and the amount of said mixture introduced equaling approximately one-half cup times the total number of cylinders in the engine; causing the engine to continue to operate at said relatively constant engine speed for a period of time of approximately ten minutes; terminating the operation of the engine; reactivating the ignition mechanisms of said first group of cylinders; rendering the ignition mechanisms of a second predetermined group of cylinders inoperative, said second group of cylinders numbering one-half the total number of cylinders and excluding all members of said first group; repeating said engine operation, introduction, continued operation, termination and reactivation steps; causing the engine to be in its normal operating condition; and operating the engine for at least twenty minutes so as to eliminate any of said combustible solvent mixture remaining in the cylinders.
Claim 2
Independent Claim
260 words
A method for cleaning the interior of internal combustion engine cylinders comprising: rendering the ignition mechanisms of a first predetermined group of cylinders inoperative, said first group numbering one-half of the total number of cylinders and has its members arranged so as to provide for a minimum of disruptive forces and torques upon the engine block caused by the operation of the engine with the ignition mechanisms of said first group of cylinders being inoperative; operating the engine at a relatively constant engine speed of approximately 2500 revolutions per minute; introducing a combustible solvent mixture directly into the carburetor of the engine, said mixture being comprised of kerosene and acetone with the percentage by volume of kerosene in said mixture being between fifty and sixty-seven percent, and the amount of said mixture introduced equaling approximately one-half cup times the total number of cylinders in the engine; causing the engine to continue to operate at said relatively constant engine speed for a period of time of approximately ten minutes; terminating the operation of the engine; reactivating the ignition mechanisms of said first group of cylinders; rendering the ignition mechanisms of a second predetermined group of cylinders inoperative, said second group of cylinders numbering one-half the total number of cylinders and excluding all members of said first group; repeating said engine operation, introduction, continued operation, termination and reactivation steps; causing the engine to be in its normal operating condition; and operating the engine for at least twenty minutes so as to eliminate any of said combustible solvent mixture remaining in the cylinders.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-08 | 1983-10-08 | 1984-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-08 | 1987-10-08 | 1988-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-08 | 1991-10-08 | 1992-04-08 | $7700.00 | Window Closed / Lapsed |