Patent US4834667A successfully refreshed from Google Patents.
US4401072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion chamber of a compression-ignition type internal combustion engine
Assignee: Toyota Motor Corp
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Filing: 1981-01-22
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Granted: 1983-08-30
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Expires: 2001-01-22
Abstract
Abstract A compression-ignition type internal combustion engine comprising a combustion chamber and an accumulation chamber which are interconnected to each other via an accumulation valve. The opening operation of the accumulation valve is controlled so that the accumulation valve remains opened during the compression stroke. In the first half of the compression stroke, a jet of air is spouted into the combustion chamber from the accumulation chamber to create a strong swirl motion in the combustion chamber. In the latter half of the compression stroke, the air in the combustion chamber flows into the accumulation chamber where the air is accumulated under high pressure, which air is then spouted from the accumulation chamber into the combustion chamber at the next cycle.
Inventors
- 👤 Sumio Ito
- 👤 Teruo Kumai
- 👤 Hisashi Oki
- 👤 Toshio Tanahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:55
CPC Classifications
F; F02; F02B; F02B31/00; F02B19/00; F02B19/02; F02B2275/00; F02B2275/14; F02B2275/40; F02B3/00; F02B3/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
190 words
A compression-ignition type internal combustion engine comprising: a cylinder block having a cylinder bore therein; a cylinder head mounted on said cylinder block and having a cavity therein; a piston reciprocally movable in said cylinder bore; a combustion chamber formed between said cylinder head and said piston, said cavity having a port connected to said combustion chamber; an intake valve movably mounted on said cylinder head for leading air into said combustion chamber; an exhaust valve movably mounted on said cylinder head for discharging exhaust gas into the atmosphere; a fuel supply means arranged in said combustion chamber; an auxiliary fuel injector arranged in said cavity; and a valve means for opening said port of the cavity during the compression stroke to spout a jet of gas under pressure into said combustion chamber from said cavity during the first half of the compression stroke, wherein said valve means is opened at a crank angle near a crank angle at which said intake valve is closed, said valve means being closed at a crank angle near a crank angle at which the injecting operation of said fuel supply means is started.
Claim 2
Dependent Claim
190 words
A compression-ignition type internal combustion engine comprising: a cylinder block having a cylinder bore therein; a cylinder head mounted on said cylinder block and having a cavity therein; a piston reciprocally movable in said cylinder bore; a combustion chamber formed between said cylinder head and said piston, said cavity having a port connected to said combustion chamber; an intake valve movably mounted on said cylinder head for leading air into said combustion chamber; an exhaust valve movably mounted on said cylinder head for discharging exhaust gas into the atmosphere; a fuel supply means arranged in said combustion chamber; an auxiliary fuel injector arranged in said cavity; and a valve means for opening said port of the cavity during the compression stroke to spout a jet of gas under pressure into said combustion chamber from said cavity during the first half of the compression stroke, wherein said valve means is opened at a crank angle near a crank angle at which said intake valve is closed, said valve means being closed at a crank angle near a crank angle at which the injecting operation of said fuel supply means is started.
Claim 3
Dependent Claim
175 words
A compression-ignition type internal combustion engine comprising: a cylinder block having a cylinder bore therein; a cylinder head mounted on said cylinder block and having a cavity therein; a piston reciprocally movable in said cylinder bore; a combustion chamber formed between said cylinder head and said piston, said cavity having a port connected to said combustion chamber; an intake valve movably mounted on said cylinder head for leading air into said combustion chamber; an exhaust valve movably mounted on said cylinder head for discharging exhaust gas into the atmosphere; a fuel injector arranged in said combustion chamber; an auxiliary fuel injector arranged in said cavity; and a valve means for opening said port of the cavity during the compression stroke to spout a jet of gas under pressure into said combustion chamber from said cavity during the first half of the compression stroke, wherein said piston has a spherical recess formed in an upper portion thereof, said fuel injector having a fuel injector nozzle which is directed tangentially to an inner wall of said recess.
Claim 4
Dependent Claim
175 words
A compression-ignition type internal combustion engine comprising: a cylinder block having a cylinder bore therein; a cylinder head mounted on said cylinder block and having a cavity therein; a piston reciprocally movable in said cylinder bore; a combustion chamber formed between said cylinder head and said piston, said cavity having a port connected to said combustion chamber; an intake valve movably mounted on said cylinder head for leading air into said combustion chamber; an exhaust valve movably mounted on said cylinder head for discharging exhaust gas into the atmosphere; a fuel injector arranged in said combustion chamber; an auxiliary fuel injector arranged in said cavity; and a valve means for opening said port of the cavity during the compression stroke to spout a jet of gas under pressure into said combustion chamber from said cavity during the first half of the compression stroke, wherein said piston has a spherical recess formed in an upper portion thereof, said fuel injector having a fuel injector nozzle which is directed tangentially to an inner wall of said recess.
Claim 5
Dependent Claim
165 words
A compression-ignition type internal combustion engine comprising: a cylinder block having a cylinder bore therein; a cylinder head mounted on said cylinder block and having a cavity therein; a piston reciprocally movable in said cylinder bore; a combustion chamber formed between said cylinder head and said piston, said cavity having a port connected to said combustion chamber; an intake valve movably mounted on said cylinder head for leading air into said combustion chamber; an exhaust valve movably mounted on said cylinder head for discharging exhaust gas into the atmosphere; a fuel supply means arranged in said combustion chamber; an auxiliary fuel injector arranged in said cavity; and a valve means for opening said port of the cavity during the compression stroke to spout a jet of gas under pressure into said combustion chamber from said cavity during the first half of the compression stroke, wherein the injecting operation of said auxiliary fuel injector is started after the injecting operation of said fuel injector is started.
Claim 6
Dependent Claim
165 words
A compression-ignition type internal combustion engine comprising: a cylinder block having a cylinder bore therein; a cylinder head mounted on said cylinder block and having a cavity therein; a piston reciprocally movable in said cylinder bore; a combustion chamber formed between said cylinder head and said piston, said cavity having a port connected to said combustion chamber; an intake valve movably mounted on said cylinder head for leading air into said combustion chamber; an exhaust valve movably mounted on said cylinder head for discharging exhaust gas into the atmosphere; a fuel supply means arranged in said combustion chamber; an auxiliary fuel injector arranged in said cavity; and a valve means for opening said port of the cavity during the compression stroke to spout a jet of gas under pressure into said combustion chamber from said cavity during the first half of the compression stroke, wherein the injecting operation of said auxiliary fuel injector is started after the injecting operation of said fuel injector is started.
Claim 7
Dependent Claim
178 words
A compression-ignition type internal combustion engine comprising: a cylinder block having a cylinder bore therein; a cylinder head mounted on said cylinder block and having a cavity therein; a piston reciprocally movable in said cylinder bore; a combustion chamber formed between said cylinder head and said piston, said cavity having a port connected to said combustion chamber; an intake valve movably mounted on said cylinder head for leading air into said combustion chamber; an exhaust valve movably mounted on said cylinder head for discharging exhaust gas into the atmosphere; a fuel supply means arranged in said combustion chamber; an auxiliary fuel injector arranged in said cavity; and a valve means for opening said port of the cavity during the compression stroke to spout a jet of gas under pressure into said combustion chamber from said cavity during the first half of the compression stroke, wherein said combustion chamber comprises a main chamber and a vortex chamber which are interconnected to each other via a connecting passage, said cavity being connected to said vortex chamber via a gas passage.
Claim 8
Dependent Claim
178 words
A compression-ignition type internal combustion engine comprising: a cylinder block having a cylinder bore therein; a cylinder head mounted on said cylinder block and having a cavity therein; a piston reciprocally movable in said cylinder bore; a combustion chamber formed between said cylinder head and said piston, said cavity having a port connected to said combustion chamber; an intake valve movably mounted on said cylinder head for leading air into said combustion chamber; an exhaust valve movably mounted on said cylinder head for discharging exhaust gas into the atmosphere; a fuel supply means arranged in said combustion chamber; an auxiliary fuel injector arranged in said cavity; and a valve means for opening said port of the cavity during the compression stroke to spout a jet of gas under pressure into said combustion chamber from said cavity during the first half of the compression stroke, wherein said combustion chamber comprises a main chamber and a vortex chamber which are interconnected to each other via a connecting passage, said cavity being connected to said vortex chamber via a gas passage.
Claim 9
Dependent Claim
171 words
A compression-ignition type internal combustion engine comprising: a cylinder block having a cylinder bore therein; a cylinder head mounted on said cylinder block and having a cavity therein; a piston reciprocally movably in said cylinder bore; a combustion chamber formed between said cylinder head and said piston, said cavity having a port connected to said combustion chamber; an intake valve movably mounted on said cylinder head for leading air into said combustion chamber; an exhaust valve movably mounted on said cylinder head for discharging exhaust gas into the atmosphere; a fuel supply means arranged in said combustion chamber; an auxiliary fuel injector arranged in said cavity; and a valve means for opening said port of the cavity during the compression stroke to spout a jet of gas under pressure into said combustion chamber from said cavity during the first half of the compression stroke, wherein said engine comprises a common connecting passage and a plurality of cylinders each having one of said cavities which is connected to said common connecting passage.
Claim 10
Dependent Claim
171 words
A compression-ignition type internal combustion engine comprising: a cylinder block having a cylinder bore therein; a cylinder head mounted on said cylinder block and having a cavity therein; a piston reciprocally movably in said cylinder bore; a combustion chamber formed between said cylinder head and said piston, said cavity having a port connected to said combustion chamber; an intake valve movably mounted on said cylinder head for leading air into said combustion chamber; an exhaust valve movably mounted on said cylinder head for discharging exhaust gas into the atmosphere; a fuel supply means arranged in said combustion chamber; an auxiliary fuel injector arranged in said cavity; and a valve means for opening said port of the cavity during the compression stroke to spout a jet of gas under pressure into said combustion chamber from said cavity during the first half of the compression stroke, wherein said engine comprises a common connecting passage and a plurality of cylinders each having one of said cavities which is connected to said common connecting passage.
Claim 11
Dependent Claim
34 words
A compression-ignition type internal combustion engine as claimed in claim 1, wherein said engine further comprises guide means for guiding said jet of air to create a strong swirl motion in said combustion chamber.
Claim 12
Dependent Claim
19 words
A compression-ignition type internal combustion engine as claimed in claim 6, wherein said guide means comprises a guide passage.
Claim 13
Dependent Claim
27 words
A compression-ignition type internal combustion engine as claimed in claim 7, wherein said guide passage is a groove formed in an inner wall of said cylinder head.
Claim 14
Dependent Claim
59 words
A compression-ignition type internal combustion engine as claimed in claim 8, wherein said valve means comprises a poppet valve having a valve head which is directly exposed to said combustion chamber, said groove being formed by a pair of vertical walls and a semi-cylindrical wall located at a position closely adjacent to the peripheral edge of said valve head.
Claim 15
Dependent Claim
23 words
A compression-ignition type internal combustion engine as claimed in claim 8, wherein said groove extends to the circumferential direction of said combustion chamber.
Claim 16
Dependent Claim
25 words
A compression-ignition type internal combustion engine as claimed in claim 1, wherein said fuel supply means comprises a fuel injector arranged in said combustion chamber.
Claim 17
Dependent Claim
23 words
A compression-ignition type internal combustion engine as claimed in claim 11, wherein said engine further comprises a glow plug arranged in said cavity.
Claim 18
Dependent Claim
25 words
A compression-ignition type internal combustion engine as claimed in claim 4, wherein said fuel supply means comprises a fuel injector arranged in said vortex chamber.
Claim 19
Dependent Claim
35 words
A compression-ignition type internal combustion engine as claimed in claim 4, wherein said fuel supply means comprises a fuel injector arranged in said main chamber and an auxiliary fuel injector arranged in said vortex chamber.
Claim 20
Dependent Claim
41 words
A compression-ignition type internal combustion engine as claimed in claim 4, wherein said connecting passage is tangentially connected to an inner wall of said vortex chamber and has an opening which is directed towards a circumferential direction of said vortex chamber.
Claim 21
Dependent Claim
45 words
A compression-ignition type internal combustion engine as claimed in claim 15, wherein said gas passage is tangentially connected to the inner wall of the vortex chamber and has an opening directed to the circumferential direction towards which the opening of said connecting passage is directed.
Claim 22
Dependent Claim
36 words
A compression-ignition type internal combustion engine as claimed in claim 5, wherein said fuel supply means comprises a fuel injector arranged in said combustion chamber, and an auxiliary fuel injector arranged in said common connecting passage.
Claim 23
Dependent Claim
42 words
A compression-ignition type internal combustion engine as claimed in claim 17, wherein a perforated tube extending over the entire length of said common connecting passage is arranged in said common connecting passage, said auxiliary fuel injector being arranged in said perforated tube.
Claim 24
Dependent Claim
25 words
A compression-ignition type internal combustion engine as claimed in claim 6, wherein said engine further comprises a glow plug arranged in said common connecting passage.
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) | 1986-08-29 | 1987-02-28 | 1987-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-29 | 1991-02-28 | 1991-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-29 | 1995-02-28 | 1995-08-30 | $7700.00 | Window Closed / Lapsed |