US3965872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Main combustion chamber of swirl chamber type diesel engine
Assignee: Toyota Motor Corp
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Filing: 1975-01-03
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Granted: 1976-06-29
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Expires: 1995-01-03
Abstract
Abstract A main combustion chamber that permits efficient combustion throughout the entire rotation range comprising a groove extending diametrically from an edge portion of the top surface of a piston and a pair of twin-leaved recesses branched from amidst the groove, each one of the pair of twin-leaved recesses have an edge portion that is circular or otherwise. Both the groove and the recesses are formed in the top surface of a piston of a swirl chamber type diesel engine.
Inventors
- 👤 Kaoru Taira
- 👤 Hirotoshi Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:28
CPC Classifications
F; F02; F02F; F02F3/00; F02F3/26; F02B; F02B23/00; F02B23/02; F02B23/04; F02B3/00; F02B3/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
92 words
In a swirl chamber type diesel engine comprising a piston, a main combustion chamber comprising a straight inclined groove formed in the top surface of said piston, said straight groove extends diametrically from an edge portion of said surface and becoming shallower as the groove extends inward from said edge portion, said main combustion chamber further comprising a pair of twin-leaved recesses, each one of said pair of twin-leaved recesses extending from substantially the mid portion of a respective one of the pair of opposing straight sides of said straight inclined groove.
Claim 2
Dependent Claim
92 words
In a swirl chamber type diesel engine comprising a piston, a main combustion chamber comprising a straight inclined groove formed in the top surface of said piston, said straight groove extends diametrically from an edge portion of said surface and becoming shallower as the groove extends inward from said edge portion, said main combustion chamber further comprising a pair of twin-leaved recesses, each one of said pair of twin-leaved recesses extending from substantially the mid portion of a respective one of the pair of opposing straight sides of said straight inclined groove.
Claim 3
Dependent Claim
24 words
In a diesel engine as claimed in claim 1 wherein: each one of said pair of twin-leaved recesses has a substantially circular edge portion.
Claim 4
Dependent Claim
30 words
In a diesel engine as claimed in claim 1, wherein: said straight groove extends diametrically from said edge portion to a point beyond the center of the piston top surface.
References Cited (Backward Citations)
US3105470A
Cited
US3196857A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |