Patent US3874357A successfully refreshed from Google Patents.
US3874357A
Expired / Lapsed
US
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Method for the improvement of mixture formation in the cylinder of an internal combustion engine and internal combustion engine operated in accordance with this method
Assignee: Individual
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Filing: 1972-02-29
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Granted: 1975-04-01
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Expires: 1992-02-29
Abstract
Abstract Disclosed is an internal combustion engine, and in particular a diesel engine, wherein the fuel-air mixture provided to the cylinder is improved by splitting the airstream directed to the cylinder into at least two partial streams and thereafter reuniting the partial streams at an angle relative to one another whereby turbulence is provided to provide a more uniform mixture of air and fuel.
Inventors
- 👤 Hans List
- 👤 Erich Schreiber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:55
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/24; F02F1/42; F02F1/4228; F02B; F02B2275/00; F02B2275/14; F02B3/00; F02B3/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
186 words
An internal combustion engine with interior mixture formation, particUlarly a diesel engine, comprising at least one intake valve arranged eccentrically in relation to the cylinder axis for each cylinder, an inlet port extending from one side of the cylinder head to said intake valve, said inlet port having an elongated supply portion extending from said side of the cylinder head toward the intake valve and a portion adjacent the said supply portion and wound spirally around the intake valve and sloping towards the same, a port tongue formed in said inlet port and extending from said supply portion into said spiral-shaped port portion, said port tongue defining a sharp edge for the current of combustion air in said inlet port, a valve guide bearing extending through said spiral-shaped port portion, said port tongue extending from the valve guide bearing to the outside diameter of the inlet port approximately along a straight line and in tangential relationship to the valve guide bearing and at an acute angle of less than 60* relative to a plane containing the axes of the intake valve and of the associated cylinder.
Claim 2
Dependent Claim
186 words
An internal combustion engine with interior mixture formation, particUlarly a diesel engine, comprising at least one intake valve arranged eccentrically in relation to the cylinder axis for each cylinder, an inlet port extending from one side of the cylinder head to said intake valve, said inlet port having an elongated supply portion extending from said side of the cylinder head toward the intake valve and a portion adjacent the said supply portion and wound spirally around the intake valve and sloping towards the same, a port tongue formed in said inlet port and extending from said supply portion into said spiral-shaped port portion, said port tongue defining a sharp edge for the current of combustion air in said inlet port, a valve guide bearing extending through said spiral-shaped port portion, said port tongue extending from the valve guide bearing to the outside diameter of the inlet port approximately along a straight line and in tangential relationship to the valve guide bearing and at an acute angle of less than 60* relative to a plane containing the axes of the intake valve and of the associated cylinder.
Claim 3
Dependent Claim
60 words
An internal combustion engine according to claim 1, wherein the spiral-shaped port portion comprises an upper boundary wall and a sidewall, said upper boundary wall forming an angle Beta of about 30* to 60* with the axis of said intake valve and the sidewall forming an angle gamma of about 20* to 50* with the axis of the intake valve.
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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |