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US3583373A
Expired / Lapsed
US
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Mixture-inducing internal combustion engine with vortexing charge in the combustion space
Assignee: Daimler Benz AG
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Filing: 1969-05-16
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Granted: 1971-06-08
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Expires: 1989-05-16
Abstract
Abstract An internal combustion engine with externally applied ignition and suspended valves in which a vortexing movement is imparted to the in-flowing charge and in which a piston combustion space has such a shape that the contact lines of the flame front, as it travels from the area of the ignition source to the circumferential areas of the piston, at least approximates to the contour lines of the recess.
Inventors
- 👤 Horst Hardenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:25
CPC Classifications
F; F02; F02B; F02B23/00; F02B23/08; F02F; F02F1/00; F02F1/24; F02F1/26; F02F1/36; F02F1/365; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
151 words
A mixture-inducing internal combustion engine with externally applied ignition and suspended valves, which includes means for imparting to the charge flowing into the working cylinder during the suction stroke a swirling movement about an axis extending generally in the direction of the cylinder axis and an ignition source arranged eccentrically to the cylinder center, and in which the piston top is provided with a substantially flat-walled recess, characterized in that the recess forms a piston combustion space receiving nearly the entire compression volume in the piston top dead center position, and in that the depth of the recess decreases in the direction of the flame propagation, taking place from the ignition source in the direction of movement of the charge swirl, up to the outer circumference of the recess in such a manner that the lines of contact of the flame front are at least approximately contour lines of the recess.
Claim 2
Dependent Claim
151 words
A mixture-inducing internal combustion engine with externally applied ignition and suspended valves, which includes means for imparting to the charge flowing into the working cylinder during the suction stroke a swirling movement about an axis extending generally in the direction of the cylinder axis and an ignition source arranged eccentrically to the cylinder center, and in which the piston top is provided with a substantially flat-walled recess, characterized in that the recess forms a piston combustion space receiving nearly the entire compression volume in the piston top dead center position, and in that the depth of the recess decreases in the direction of the flame propagation, taking place from the ignition source in the direction of movement of the charge swirl, up to the outer circumference of the recess in such a manner that the lines of contact of the flame front are at least approximately contour lines of the recess.
Claim 3
Dependent Claim
25 words
An internal combustion engine according to claim 1, characterized in that the relatively flat wall portions of the recess have relatively large radii of curvature.
Claim 4
Dependent Claim
45 words
An internal combustion engine according to claim 2 characterized in that said wall portion define at least those areas of the recess traversed by the flame front in its travel from the ignition source toward the outer circumference in the direction of the charge swirl.
Claim 5
Dependent Claim
26 words
An internal combustion engine according to claim 1, characterized in that the greatest depth of said recess is located within the area underneath the ignition source.--
Claim 6
Dependent Claim
70 words
An internal combustion engine according to Claim 3, characterized in that the combustion space formed by said recess is irregularly curved and asymmetrical to the cylinder axis, with the wall portions thereof from the area underneath the ignition source to the nearest circumference of the recess having generally smaller radii of curvatures than the wall portion of the recess from said area to the diametrically opposite circumference of the recess.
Claim 7
Dependent Claim
83 words
An internal combustion engine according to claim 1, characterized in that the combustion space formed by said recess is irregularly curved and asymmetrical to the cylinder axis, with the wall portions thereof from the area underneath the ignition source to the nearest circumference of the recess having generally smaller radii of curvatures than the wall portion of the recess having generally smaller radii of curvatures than the wall portions of the recess from said area to the diametrically opposite circumference of the recess.
Claim 8
Dependent Claim
26 words
An internal combustion engine according to claim 1, characterized in that the outer rim of the recess forms simultaneously the circumferential rim of the piston top.
Claim 9
Dependent Claim
28 words
An internal combustion engine according to claim 7, characterized in that the outer rim of the recess is disposed at least partially in a common piston cross plane.
Claim 10
Dependent Claim
28 words
An internal combustion engine according to claim 1, characterized in that the outer rim of the recess is disposed at least partially in a common piston cross plane.
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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |