US5027768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection control system for diesel engine
Assignee: Nissan Motor Co Ltd
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Filing: 1990-06-25
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Granted: 1991-07-02
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Expires: 2010-06-25
Abstract
Abstract In a system for controlling an injection timing are detected an oxygen concentration in an exhaust gas, and a specific gravity of a fuel. A smoke concentration is calculated based on the oxygen concentration and the fuel specific gravity. The fuel injection amount is corrected based on this smoke concentration.
Inventors
- 👤 Shogo Saegusa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:22
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/30; F02D41/38; F02D19/00; F02D19/06; F02D19/0602; F02D19/0607; F02D19/061; F02D19/0626; F02D19/0634; F02D19/0639; F02D19/0649; F02D41/40; F02D41/401; F02B; F02B3/00; F02B3/06; F02D2200/00; F02D2200/02; F02D2200/06; F02D2200/0611; F02D2250/00; F02D2250/32; F02D2250/38; F02D41/0025; F02D41/406; F02D41/408; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/30; Y02T10/40
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
146 words
A system for controlling an injection quantity, comprising: means for detecting an engine operating condition and generating an engine operating condition indicative signal indicative of said engine operating condition detected; means for calculating a fuel injection amount based on said engine operating condition indicative signal and generating a fuel injection amount indicative signal indicative of said fuel injection amount calculated; means for detecting an oxygen concentration in an exhaust gas and generating an oxygen concentration indicative signal indicative of said oxygen concentration detected; means for detecting a specific gravity of a fuel and generating a specific gravity indicative signal indicative of said specific gravity detected; means for calculating a smoke concentration based on said oxygen concentration indicative signal and said specific gravity indicative signal and generating a smoke concentration indicative signal; and means for correcting said fuel injection amount based on said smoke concentration indicative signal.
Claim 2
Independent Claim
146 words
A system for controlling an injection quantity, comprising: means for detecting an engine operating condition and generating an engine operating condition indicative signal indicative of said engine operating condition detected; means for calculating a fuel injection amount based on said engine operating condition indicative signal and generating a fuel injection amount indicative signal indicative of said fuel injection amount calculated; means for detecting an oxygen concentration in an exhaust gas and generating an oxygen concentration indicative signal indicative of said oxygen concentration detected; means for detecting a specific gravity of a fuel and generating a specific gravity indicative signal indicative of said specific gravity detected; means for calculating a smoke concentration based on said oxygen concentration indicative signal and said specific gravity indicative signal and generating a smoke concentration indicative signal; and means for correcting said fuel injection amount based on said smoke concentration indicative signal.
Claim 3
Independent Claim
143 words
A method of controlling a fuel injection in a diesel engine, the method comprising the steps of: detecting an engine operating condition and generating an engine operating condition indicative signal indicative of said engine operating condition detected; calculating a fuel injection amount based on said engine operating condition indicative signal and generating a fuel injection amount indicative signal indicative of said fuel injection amount calculated; detecting an oxygen concentration in an exhaust gas and generating an oxygen concentration indicative signal indicative of said oxygen concentration detected; detecting a specific gravity of a fuel and generating a specific gravity indicative signal indicative of said specific gravity detected; calculating a smoke concentration based on said oxygen concentration indicative signal and said specific gravity indicative signal and generating a smoke concentration indicative signal; and correcting said fuel injection amount based on said smoke concentration indicative signal.
Claim 4
Independent Claim
143 words
A method of controlling a fuel injection in a diesel engine, the method comprising the steps of: detecting an engine operating condition and generating an engine operating condition indicative signal indicative of said engine operating condition detected; calculating a fuel injection amount based on said engine operating condition indicative signal and generating a fuel injection amount indicative signal indicative of said fuel injection amount calculated; detecting an oxygen concentration in an exhaust gas and generating an oxygen concentration indicative signal indicative of said oxygen concentration detected; detecting a specific gravity of a fuel and generating a specific gravity indicative signal indicative of said specific gravity detected; calculating a smoke concentration based on said oxygen concentration indicative signal and said specific gravity indicative signal and generating a smoke concentration indicative signal; and correcting said fuel injection amount based on said smoke concentration indicative signal.
Claim 5
Dependent Claim
182 words
In a diesel engine: means for injecting a fuel to the engine; means for detecting an engine operating condition and generating an engine operating condition indicative signal indicative of said engine operating condition detected; means for calculating a fuel injection amount based on said engine operating condition indicative signal and generating a fuel injection amount indicative signal indicative of said fuel injection amount calculated; means for detecting an oxygen concentration in an exhaust gas and generating an oxygen concentration indicative signal indicative of said oxygen concentration detected; means for detecting a specific gravity of a fuel and generating a specific gravity indicative signal indicative of said specific gravity detected; means for calculating a smoke concentration based on said oxygen concentration indicative signal and said specific gravity indicative signal and generating a smoke concentration indicative signal; means for correcting said fuel injection amount based on said smoke concentration indicative signal and generating a fuel injection amount correcting signal indicative of said fuel injection amount corrected; and means for effecting operation of said fuel injecting means based on said fuel injection amount correcting signal.
Claim 6
Dependent Claim
182 words
In a diesel engine: means for injecting a fuel to the engine; means for detecting an engine operating condition and generating an engine operating condition indicative signal indicative of said engine operating condition detected; means for calculating a fuel injection amount based on said engine operating condition indicative signal and generating a fuel injection amount indicative signal indicative of said fuel injection amount calculated; means for detecting an oxygen concentration in an exhaust gas and generating an oxygen concentration indicative signal indicative of said oxygen concentration detected; means for detecting a specific gravity of a fuel and generating a specific gravity indicative signal indicative of said specific gravity detected; means for calculating a smoke concentration based on said oxygen concentration indicative signal and said specific gravity indicative signal and generating a smoke concentration indicative signal; means for correcting said fuel injection amount based on said smoke concentration indicative signal and generating a fuel injection amount correcting signal indicative of said fuel injection amount corrected; and means for effecting operation of said fuel injecting means based on said fuel injection amount correcting signal.
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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) | 1994-07-01 | 1994-12-31 | 1995-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-01 | 1998-12-31 | 1999-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-01 | 2002-12-31 | 2003-07-02 | $7700.00 | Window Closed / Lapsed |