US4098246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine with an auxiliary combustion chamber
Assignee: Toyota Motor Corp
•
Filing: 1976-12-09
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Granted: 1978-07-04
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Expires: 1996-12-09
Abstract
Abstract Disclosed is an internal combustion engine with an auxiliary combustion chamber having an exhaust gas recirculating device for recirculating the exhaust gas from the exhaust system into the intake system. The auxiliary combustion chamber is connected only to the main combustion chamber via at least two connecting passages. The connecting passages are arranged so that the combustible mixture introduced into the auxiliary combustion chamber from the main combustion chamber via one of said connecting passages strengthens the swirl motion of the mixture created by the combustible mixture introduced into the auxiliary combustion chamber from the main combustion chamber via the other connecting passage.
Inventors
- 👤 Masaaki Noguchi
- 👤 Shougo Sanda
- 👤 Norihiko Nakamura
- 👤 Takashi Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:16
CPC Classifications
F; F02; F02B; F02B19/00; F02B19/12; F02M; F02M26/00; F02M26/13; F02M26/41; F02M26/52; F02M26/55; F02M26/56; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
198 words
An internal combustion engine having an intake system, an exhaust system, and an exhaust gas recirculating system for recirculating the exhaust gas from the exhaust system into the intake system, comprising: a cylinder comprising a cylinder block and a cylinder head; a piston reciprocally movable in said cylinder; a main combustion chamber formed in said cylinder between said cylinder head and said piston, said cylinder head having therein a bore which has an inner wall defining an auxiliary combustion chamber; a first connecting passage communicating said auxiliary combustion chamber with said main combustion chamber and opening into said auxiliary combustion chamber tangentially to the inner wall of said auxiliary combustion chamber for generating a swirl motion of a combustible mixture containing the recirculated exhaust gas therein in said auxiliary combustion chamber; a second connecting passage communicating said auxiliary combustion chamber with said main combustion chamber and opening into the auxiliary combustion chamber towards said inner wall of the auxiliary combustion chamber to which said first connecting passage opens tangentially for strengthening said swirl motion, and; a spark plug having a spark gap located in an auxiliary chamber region consisting of said auxiliary combustion chamber and said connecting passages.
Claim 2
Dependent Claim
198 words
An internal combustion engine having an intake system, an exhaust system, and an exhaust gas recirculating system for recirculating the exhaust gas from the exhaust system into the intake system, comprising: a cylinder comprising a cylinder block and a cylinder head; a piston reciprocally movable in said cylinder; a main combustion chamber formed in said cylinder between said cylinder head and said piston, said cylinder head having therein a bore which has an inner wall defining an auxiliary combustion chamber; a first connecting passage communicating said auxiliary combustion chamber with said main combustion chamber and opening into said auxiliary combustion chamber tangentially to the inner wall of said auxiliary combustion chamber for generating a swirl motion of a combustible mixture containing the recirculated exhaust gas therein in said auxiliary combustion chamber; a second connecting passage communicating said auxiliary combustion chamber with said main combustion chamber and opening into the auxiliary combustion chamber towards said inner wall of the auxiliary combustion chamber to which said first connecting passage opens tangentially for strengthening said swirl motion, and; a spark plug having a spark gap located in an auxiliary chamber region consisting of said auxiliary combustion chamber and said connecting passages.
Claim 3
Dependent Claim
53 words
An internal combustion engine as claimed in claim 1, wherein the cross-sectional area of each of said first and said second connecting passages is proportional to the respective volume of the mixture in the main combustion chamber burned by the torches injected from said first connecting passage and said second connecting passage, respectively.
Claim 4
Dependent Claim
64 words
An internal combustion engine as claimed in claim 2, wherein the opening of said first connecting passage is directed to the peripheral portion in the main combustion chamber, while the opening of said second connecting passage is directed to the central portion in the main combustion chamber, the cross-sectional area of said first connecting passage being smaller than that of said second connecting passage.
Claim 5
Dependent Claim
24 words
An internal combustion engine as claimed in claim 3, wherein the spark gap of the spark plug is located in said first connecting passage.
Claim 6
Dependent Claim
24 words
An internal combustion engine as claimed in calim 3, wherein the spark gap of the spark plug is located in said second connecting passage.
Claim 7
Dependent Claim
31 words
An internal combustion engine as claimed in claim 5, wherein a dam is formed on the inner wall of the auxiliary combustion chamber near the spark gap of the spark plug.
Claim 8
Dependent Claim
64 words
An internal combustion engine as claimed in claim 2, wherein the opening of said first connecting passage is directed to the central portion in the main combustion chamber, while the opening of said second connecting passage is directed to the peripheral portion in the main combustion chamber, the cross-sectional area of said first connecting passage being larger than those of said second connecting passage.
Claim 9
Dependent Claim
24 words
An internal combustion engine as claimed in claim 7, wherein the spark gap of the spark plug is located in said first connecting passage.
Claim 10
Dependent Claim
24 words
An internal combustion engine as claimed in claim 7, wherein the spark gap of the spark plug is located in said second connecting passage.
Claim 11
Dependent Claim
27 words
An internal combustion engine as claimed in claim 2, wherein the cross-sectional area of said first connecting passage is equal to those of said second connecting passage.
Claim 12
Dependent Claim
24 words
An internal combustion engine as claimed in claim 10, wherein the spark gap of the spark plug is located in said first connecting passage.
Claim 13
Dependent Claim
24 words
An internal combustion engine as claimed in claim 10, wherein the spark gap of the spark plug is located in said second connecting passage.
Claim 14
Dependent Claim
55 words
An internal combustion engine as claimed in claim 1, wherein a third connecting passage is further provided for communicating said auxiliary combustion chamber with said main combustion chamber, said third connecting passage opening into the auxiliary combustion chamber towards the inner wall of the auxiliary combustion chamber to which said first connecting passage opens tangentially.
Claim 15
Dependent Claim
24 words
An internal cobmustion engine as claimed in claim 13, wherein the spark gap of the spark plug is located in said first connecting passage.
Claim 16
Dependent Claim
24 words
An internal combustion engine as claimed in claim 13, wherein the spark gap of the spark plug is located in said second connecting passage.
Claim 17
Dependent Claim
58 words
An internal combustion engine as claimed in claim 1, wherein a plurality of connecting passages are further provided for communicating said auxiliary combustion chamber with said main combustion chamber, said plurality of the connecting passages opening into the auxiliary combustion chamber towards the inner wall of the auxiliary combustion chamber to which said first connecting passage opens tangentially.
Claim 18
Dependent Claim
37 words
An internal combustion engine as claimed in claim 1, wherein the value of the volume of the auxiliary combustion chamber/the total cross-sectional area of the connecting passages is within the range of 3 cm through 20 cm.
Claim 19
Dependent Claim
24 words
An internal combustion engine as claimed in claim 17, wherein the cross-sectional area of the connecting passage is larger than 3.14 mm 3 .
Claim 20
Dependent Claim
26 words
An internal combustion engine as claimed in claim 1, wherein said auxiliary combustion chamber is formed in an auxiliary chamber component press-fitted into the cylinder head.
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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) | 1981-07-03 | 1982-01-02 | 1982-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-03 | 1986-01-02 | 1986-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-03 | 1990-01-02 | 1990-07-04 | $7700.00 | Window Closed / Lapsed |