US4366788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine
Assignee: Nissan Motor Co Ltd
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Filing: 1980-09-30
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Granted: 1983-01-04
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Expires: 2000-09-30
Abstract
Abstract A split engine is disclosed which includes first and second groups of cylinders and an intake passage having its downstream portion divided into first and second branches leading respectively to the first and second groups of cylinders. At low load conditions, the second intake passage branch is disconnected from the intake passage and supplied with exhaust gases. A passage is provided which has its one end opening into the crankcase and the other end opening into the first intake passage branch for introducing blow-by gases into the first intake passage branch.
Inventors
- 👤 Toshiaki Tanaka
- 👤 Kazuya Kunii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:13
CPC Classifications
F; F02; F02D; F02D21/00; F02D21/06; F02D21/08; F01; F01M; F01M13/00; F01M13/02; F02D17/00; F02D17/02; F02M; F02M26/00; F02M26/13; F02M26/42; F02M26/43; F02M1/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
164 words
An internal combustion engine comprising: (a) a crankcase; (b) an exhaust passage; (c) first and second cylinder units each including at least one cylinder; (d) an intake passage having therein a throttle valve, said intake passage being divided downstream of said throttle valve into first and second branches respectively communicating with said first and second cylinder units, said intake passage second branch having a stop valve near its entrance; (e) an EGR passage connected from said exhaust passage to said intake passage second branch for recirculating engine exhaust gases into said intake passage second branch, said EGR passage having therein an EGR valve; (f) means for disabling said second cylinder unit, closing said stop valve, and opening said EGR valve when the engine load is below a predetermined value; and (g) a venting passage opening at its one end into said crankcase and at the other end only into said intake passage first branch for introducing blow-by gases only into said first cylinder unit.
Claim 2
Dependent Claim
164 words
An internal combustion engine comprising: (a) a crankcase; (b) an exhaust passage; (c) first and second cylinder units each including at least one cylinder; (d) an intake passage having therein a throttle valve, said intake passage being divided downstream of said throttle valve into first and second branches respectively communicating with said first and second cylinder units, said intake passage second branch having a stop valve near its entrance; (e) an EGR passage connected from said exhaust passage to said intake passage second branch for recirculating engine exhaust gases into said intake passage second branch, said EGR passage having therein an EGR valve; (f) means for disabling said second cylinder unit, closing said stop valve, and opening said EGR valve when the engine load is below a predetermined value; and (g) a venting passage opening at its one end into said crankcase and at the other end only into said intake passage first branch for introducing blow-by gases only into said first cylinder unit.
Claim 3
Dependent Claim
29 words
The internal combustion engine of claim 1, wherein said venting passage is provided therein with a check valve for blocking fluid flow therethrough from said intake passage first branch.
References Cited (Backward Citations)
FR2252024A5
Cited
GB1510459A
Cited
DE2628091A1
Cited
US4106471A
Cited
US4130102A
Cited
US4201180A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-03 | 1986-07-05 | 1987-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-03 | 1990-07-05 | 1991-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-03 | 1994-07-05 | 1995-01-04 | $7700.00 | Window Closed / Lapsed |