Patent US2689296A successfully refreshed from Google Patents.
Patent US4369752A successfully refreshed from Google Patents.
US4369752A
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Exhaust gas purification control apparatus for internal combustion engine
Assignee: Nissan Motor Co Ltd
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Filing: 1980-09-24
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Granted: 1983-01-25
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Expires: 2000-09-24
Abstract
Abstract An exhaust gas purification control apparatus for an internal combustion engine wherein vacuum signals applied to air fuel mixture control, exhaust gas recirculation control, and ignition timing control are modified by a vacuum signal modifier. The vacuum signal modifier is operative in response to a pressure signal applied thereto. This pressure signal is produced by a pressure signal control device by diluting a venturi vacuum with air.
Inventors
- 👤 Kosuke Ito
- 👤 Hiroshi Iida
- 👤 Masanori Harada
- 👤 Masato Hatakenaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:15
CPC Classifications
F; F02; F02D; F02D37/00; F02D37/02; F02M; F02M26/00; F02M26/52; F02M26/55; F02M26/56; F02M7/00; F02M7/12; F02M7/18; F02M7/20; F02P; F02P5/00; F02P5/04; F02P5/05; F02P5/10; F02P5/103; F02M2026/001; F02M2026/004
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
89 words
An exhaust gas purification control apparatus for an internal combustion engine comprising: (a) an air-fuel mixture control responsive to a first vacuum signal; (b) an exhaust gas recirculation control responsive to a second vacuum signal; (c) an ignition timing control responsive to a third vacuum signal; (d) a vacuum signal modifier for controlling at least two of said first, second, and third vacuum signals in response to a pressure signal applied thereto; and (e) a pressure control device for controlling said pressure signal applied to said vacuum signal modifier.
Claim 2
Dependent Claim
89 words
An exhaust gas purification control apparatus for an internal combustion engine comprising: (a) an air-fuel mixture control responsive to a first vacuum signal; (b) an exhaust gas recirculation control responsive to a second vacuum signal; (c) an ignition timing control responsive to a third vacuum signal; (d) a vacuum signal modifier for controlling at least two of said first, second, and third vacuum signals in response to a pressure signal applied thereto; and (e) a pressure control device for controlling said pressure signal applied to said vacuum signal modifier.
Claim 3
Dependent Claim
18 words
An apparatus as claimed in claim 1, wherein said pressure control device comprises a fluid restricting flow orifice.
Claim 4
Dependent Claim
23 words
An apparatus as claimed in claim 2, wherein said fluid restricting flow orifice of said pressure control device is a variable flow orifice.
Claim 5
Dependent Claim
22 words
An apparatus as claimed in claim 2, wherein said fluid restricting flow orifice of said pressure control device is a fixed orifice.
References Cited (Backward Citations)
GB1305235A
Cited
US3800766A
Cited
US4002154A
Cited
GB1527935A
Cited
US4193381A
Cited
US4117814A
Cited
JPS54130725A
Cited
GB2023728B
Cited
EP0009344A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-24 | 1986-07-26 | 1987-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-24 | 1990-07-26 | 1991-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-24 | 1994-07-26 | 1995-01-25 | $7700.00 | Window Closed / Lapsed |