Patent US4938188A successfully refreshed from Google Patents.
US4938188A
Expired / Lapsed
US
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Engine control apparatus
Assignee: Honda Motor Co Ltd
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Filing: 1989-07-31
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Granted: 1990-07-03
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Expires: 2009-07-31
Abstract
Abstract An engine control apparatus wherein an engine output can be adjusted in accordance with an allowable revolution speed of the engine at each valve timing so that while the engine can operate at a revolution speed of up to the highest allowable speed range when operating at a valve timing at which the allowable revolution in speed is high, it can nevertheless operate advantageously without experiencing damage to the timing belt and valve jump even when operated at a valve timing having a lower allowable revolution speed range.
Inventors
- 👤 Yasunari Seki
- 👤 Isao Yahata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:23
CPC Classifications
F; F02; F02D; F02D43/00; F01; F01L; F01L1/00; F01L1/26; F01L1/267; F02D13/00; F02D13/02; F02D13/0203; F02D13/0207; F02D13/0211; F02D13/0261; F02D13/0265; F02D31/00; F02D31/001; F02D31/007; F02D31/009; F02B; F02B2275/00; F02B2275/18; F02D41/00; F02D41/0002; F02D2041/001; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
97 words
An engine control apparatus comprising: a valve-timing changing means for changing at least one of a valve opening-closing timing and a valve-lift amount for a valve on at least one of an intake side and an exhaust side; a reduction means for reducing engine output when revolution speed of said engine has reached a predetermined upper-limit revolution speed during acceleration of the engine; and a revolution speed change means for changing said predetermined upper-limit revolution speed in accordance with at least one of a changed valve opening-closing timing and valve-lift amount effected by said valve-timing changing means.
Claim 2
Dependent Claim
97 words
An engine control apparatus comprising: a valve-timing changing means for changing at least one of a valve opening-closing timing and a valve-lift amount for a valve on at least one of an intake side and an exhaust side; a reduction means for reducing engine output when revolution speed of said engine has reached a predetermined upper-limit revolution speed during acceleration of the engine; and a revolution speed change means for changing said predetermined upper-limit revolution speed in accordance with at least one of a changed valve opening-closing timing and valve-lift amount effected by said valve-timing changing means.
Claim 3
Dependent Claim
33 words
An engine control apparatus according to claim 1, wherein said valve-timing changing means is a changeover means for step-wise changing of at least one of said valve opening-closing timing and said valve-lift amount.
Claim 4
Dependent Claim
20 words
An engine control apparatus according to claim 1, wherein said reduction means is for stopping fuel supply to said engine.
References Cited (Backward Citations)
US3735742A
Cited
US4494506A
Cited
US4651684A
Cited
JPS5990718A
Cited
US4534323A
Cited
US4638781A
Cited
US4727831A
Cited
US4788946A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-02 | 1994-01-01 | 1994-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-02 | 1998-01-01 | 1998-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-02 | 2002-01-01 | 2002-07-03 | $7700.00 | Window Closed / Lapsed |