US3898965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Auxiliary fluid injection system for internal combustion engine
Assignee: Individual
•
Filing: 1973-08-20
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Granted: 1975-08-12
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Expires: 1993-08-20
Abstract
Abstract A four cycle internal combustion engine is provided with a system for introducing fluid under pressure to a lower region of the combustion chamber, especially during the intake stroke of the piston. The normal gasoline and air charge enters the upper portion of the combustion chamber through a conventional intake valve, and this charge is ignited by suitable means following the compression stroke. The auxiliary fluid is introduced to the lower chamber through a conical baffle extending downwardly from the head of the cylinder, and this baffle cooperates with a conically shaped recess or cavity in the head of the piston to define the lower region of the combustion chamber. An auxiliary intake valve is provided in the cylinder head so that this auxiliary fluid may be so introduced at the proper time during the cycle of operation of the engine. Preferably, such auxiliary fluid is introduced in inverse proportion to the volume rate of flow of conventional gasoline and air charge. The ratio permits the use of an auxiliary fluid such as air to assure complete combustion of the gasoline vapor thereby improving the pollution control particularly during that phase of operation when the engine had been throttled back, as for example when a vehicle powered by such an engine is coasting downhill.
Inventors
- 👤 Francis A Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:31
CPC Classifications
F; F02; F02B; F02B17/00; F02B47/00; F02B1/00; F02B1/02; F02B1/04; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
243 words
An internal combustion engine comprising: a. at least one cylinder, b. a cylinder head for said cylinder including an annular baffle extending downwardly from the remainder of said head into said cylinder, c. a piston slidably received in said cylinder and having a recess in its upper portion to receive said baffle when said piston is in its top dead center position; said cylinder, cylinder head, baffle and piston, when said piston is in its top dead center position defining an annular combustion chamber surrounding the outside of said baffle; and said baffle and said piston, when said piston is in its top dead center position, defining an auxiliary chamber surrounded by said baffle and generally isolated from said combustion chamber; the length of that portion of said baffle which is received in said piston recess when said piston is in its top dead center position being greater than one-half of the stroke of said piston, d. an intake valve means communicating directly with said combustion chamber for introducing a fuel and air charge to said combustion chamber, e. an exhaust valve means communicating directly with said combustion chamber for carrying away spent gases of combustion from said combustion chamber, f. a passageway for delivering an auxiliary fluid to said auxiliary chamber, and g. an auxiliary valve means in said cylinder head between said passageway and said auxiliary chamber for controlling the flow of auxiliary fluid from said passageway to said auxiliary chamber.
Claim 2
Dependent Claim
243 words
An internal combustion engine comprising: a. at least one cylinder, b. a cylinder head for said cylinder including an annular baffle extending downwardly from the remainder of said head into said cylinder, c. a piston slidably received in said cylinder and having a recess in its upper portion to receive said baffle when said piston is in its top dead center position; said cylinder, cylinder head, baffle and piston, when said piston is in its top dead center position defining an annular combustion chamber surrounding the outside of said baffle; and said baffle and said piston, when said piston is in its top dead center position, defining an auxiliary chamber surrounded by said baffle and generally isolated from said combustion chamber; the length of that portion of said baffle which is received in said piston recess when said piston is in its top dead center position being greater than one-half of the stroke of said piston, d. an intake valve means communicating directly with said combustion chamber for introducing a fuel and air charge to said combustion chamber, e. an exhaust valve means communicating directly with said combustion chamber for carrying away spent gases of combustion from said combustion chamber, f. a passageway for delivering an auxiliary fluid to said auxiliary chamber, and g. an auxiliary valve means in said cylinder head between said passageway and said auxiliary chamber for controlling the flow of auxiliary fluid from said passageway to said auxiliary chamber.
Claim 3
Dependent Claim
44 words
The combination of claim 1 further characterized in that said depending baffle more particularly comprises a hollow conically shaped member of annular cross section open at its lower smaller end and defining a valve seat in its upper end for said auxiliary valve means.
Claim 4
Dependent Claim
49 words
The combination of claim 1 further characterized in that said recess in said piston upper surface more particularly comprises a generally conically shaped cavity for receiving said depending baffle, said baffle having an open lower end which is of circular cross section to be received in said conical cavity.
Claim 5
Dependent Claim
42 words
The combination of claim 3 wherein said baffle comprises a hollow conical member of annular cross section and defining said circular open end at its smaller end, said baffle having a valve seat in its upper end for said auxiliary valve means.
Claim 6
Dependent Claim
67 words
The combination of claim 4 further characterized by biasing means for urging said auxiliary valve means toward a closed position wherein said valve means is seated on said valve seat in the upper end of said conical baffle, and means for adjusting the biasing force of said valve biasing means so that said valve remains closed except during a portion of the intake stroke of said piston.
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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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |