US5038739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control arrangement for multi-cylinder two cycle engine
Assignee: Nissan Motor Co Ltd
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Filing: 1990-08-24
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Granted: 1991-08-13
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Expires: 2010-08-24
Abstract
Abstract A multi-cylinder 2 cycle engine having n cylinders has fuel injected and ignited at (n-1)×360/n crank angle intervals. This induces the situation wherein combustions occur in each cylinder at n-1 cycle intervals. This provides at least one piston stroke for each cylinder during in which no combustion takes place and fresh air is pumped through the combustion chamber in a manner to scavenge residual combustion gases therefrom.
Inventors
- 👤 Mitsunori Ishii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:13
CPC Classifications
F; F02; F02D; F02D17/00; F02D17/02; F02B; F02B29/00; F02D41/00; F02D41/008; F02D41/0087; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F02B2075/028; F02D2400/00; F02D2400/04; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
93 words
In a multi-cylinder two cycle internal combustion engine having n cylinders an engine load sensor; an engine speed sensor; fuel injection control means, said fuel injection control means being responsive to said engine load sensor and said engine speed sensor and arranged to detect the engine operating in a low load-low speed zone, said fuel injection means including circuitry for injecting fuel into any given cylinder at (n-1)×360/n crank angle intervals and so that combustions in said any given cylinder occur at n-1 cycles, during said low speed low load mode of operation.
Claim 2
Dependent Claim
93 words
In a multi-cylinder two cycle internal combustion engine having n cylinders an engine load sensor; an engine speed sensor; fuel injection control means, said fuel injection control means being responsive to said engine load sensor and said engine speed sensor and arranged to detect the engine operating in a low load-low speed zone, said fuel injection means including circuitry for injecting fuel into any given cylinder at (n-1)×360/n crank angle intervals and so that combustions in said any given cylinder occur at n-1 cycles, during said low speed low load mode of operation.
Claim 3
Dependent Claim
27 words
A multi-cylinder two cycle internal combustion engine as claimed in claim 1 wherein said engine has a poppet type inlet valve and a poppet type exhaust valve.
Claim 4
Dependent Claim
33 words
A multi-cylinder two cycle internal combustion engine as claimed in claim 1 wherein said fuel injection control means controls a fuel injector which injects fuel directly into a combustion chamber of the engine.
Claim 5
Dependent Claim
76 words
In a method of operating a two cycle internal combustion engine having n cylinders, the steps of: sensing engine load; sending engine speed; detecting the engine operating in a predetermined engine speed-load zone; controlling the fuel injection so that fuel is injected into a cylinder at (n-1)×360/n crank angle intervals and so that combustions in said any given cylinder occur at n-1 cycles, when said engine is detected as operating in said predetermined engine speed-load zone.
Claim 6
Dependent Claim
76 words
In a method of operating a two cycle internal combustion engine having n cylinders, the steps of: sensing engine load; sending engine speed; detecting the engine operating in a predetermined engine speed-load zone; controlling the fuel injection so that fuel is injected into a cylinder at (n-1)×360/n crank angle intervals and so that combustions in said any given cylinder occur at n-1 cycles, when said engine is detected as operating in said predetermined engine speed-load zone.
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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) | 1994-08-12 | 1995-02-11 | 1995-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-12 | 1999-02-11 | 1999-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-12 | 2003-02-11 | 2003-08-13 | $7700.00 | Window Closed / Lapsed |