Patent US4385600A successfully refreshed from Google Patents.
US4385600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Split type internal combustion engine
Assignee: Nissan Motor Co Ltd
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Filing: 1980-04-15
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Granted: 1983-05-31
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Expires: 2000-04-15
Abstract
Abstract An internal combustion engine is disclosed which includes first and second cylinder units each having at least one cylinder, and a control unit responsive to engine load for rendering the first and second cylinder units active at high load conditions and rendering the second cylinder unit inactive when the engine load is below a predetermined value. A rapid acceleration detector is provided which is responsive to rapid engine acceleration for causing the control unit to render the first and second cylinder units active regardless of the engine load.
Inventors
- 👤 Fukashi Sugasawa
- 👤 Haruhiko Iizuka
- 👤 Yukihiro Etoh
- 👤 Toshiaki Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:34
CPC Classifications
F; F02; F02D; F02D17/00; F02D17/02; F02D41/00; F02D41/008; F02D41/0087
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
102 words
An internal combustion engine comprising: (a) first and second cylinder units, each including at least one cylinder; (b) an induction passage leading to said first and second cylinder units, said induction passage having therein a throttle valve; (c) a control means responsive to engine load conditions for disabling said second cylinder unit when the engine load is below a predetermined value; and (d) means for providing a command signal to cause said control means to hold said second cylinder unit active regardless of engine load conditions when the rate of change of opening of said throttle valve is above a predetermined value.
Claim 2
Dependent Claim
102 words
An internal combustion engine comprising: (a) first and second cylinder units, each including at least one cylinder; (b) an induction passage leading to said first and second cylinder units, said induction passage having therein a throttle valve; (c) a control means responsive to engine load conditions for disabling said second cylinder unit when the engine load is below a predetermined value; and (d) means for providing a command signal to cause said control means to hold said second cylinder unit active regardless of engine load conditions when the rate of change of opening of said throttle valve is above a predetermined value.
Claim 3
Dependent Claim
109 words
An internal combustion engine comprising: (a) first and second cylinder units each including at least one cylinder; (b) an induction passage leading to said first and second cylinder units, said induction passage having therein a throttle valve drivingly associated with an accelerator pedal; (c) a control means, responsive to engine load conditions, for disabling said second cylinder unit when the engine load is below a predetermined value; and (d) means for providing a command signal to cause said control means to hold said second cylinder unit active regardless of engine load conditions when the rate of change in the depression of said accelerator pedal is above a predetermined value.
Claim 4
Dependent Claim
109 words
An internal combustion engine comprising: (a) first and second cylinder units each including at least one cylinder; (b) an induction passage leading to said first and second cylinder units, said induction passage having therein a throttle valve drivingly associated with an accelerator pedal; (c) a control means, responsive to engine load conditions, for disabling said second cylinder unit when the engine load is below a predetermined value; and (d) means for providing a command signal to cause said control means to hold said second cylinder unit active regardless of engine load conditions when the rate of change in the depression of said accelerator pedal is above a predetermined value.
Claim 5
Dependent Claim
59 words
The engine of claim 1, wherein said means comprises a sensor adapted to provide a signal indicative of the degree of opening of said throttle valve, a circuit for differentiating the signal from said sensor, and a comparator operable to provide the command signal to said control means when the output of said circuit is above a predetermined value.
Claim 6
Dependent Claim
57 words
The engine of claim 2, wherein said means comprises a sensor adapted to provide a signal indicative of the depression of said accelerator pedal, a circuit for differentiating the signal from said sensor, and a comparator operable to provide the command signal to said control unit when the output of said circuit is above a predetermined value.
References Cited (Backward Citations)
GB579554A
Cited
GB649292A
Cited
FR1108703A
Cited
GB812862A
Cited
GB1319671A
Cited
US4076003A
Cited
GB1537300A
Cited
US4080947A
Cited
DE2612172A1
Cited
US4153033A
Cited
US4144863A
Cited
AU508395B2
Cited
US4146006A
Cited
US4143635A
Cited
GB2001131A
Cited
US4274382A
Cited
US4263782A
Cited
US4296719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-30 | 1986-11-29 | 1987-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-30 | 1990-11-29 | 1991-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-30 | 1994-11-29 | 1995-05-31 | $7700.00 | Window Closed / Lapsed |