Patent US3407278A successfully refreshed from Google Patents.
US5201790A
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Fuel control apparatus of an engine
Assignee: Mazda Motor Corp
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Filing: 1991-02-04
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Granted: 1993-04-13
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Expires: 2011-02-04
Abstract
Abstract A fuel control apparatus of an engine comprises fuel control means for controlling fuel supply means in such a manner that an amount of fuel supplied to the engine corresponds to an intake pressure on the basis of a signal outputted from intake pressure detecting means for detecting the intake pressure of an intake passageway, exhaust resistance changing means for changing an exhaust resistance of an exhaust passageway correspondingly to the operating condition of the engine, and correction means for correcting a supply amount of the fuel to be controlled by the fuel control means when the exhaust resistance of the exhaust passageway is changed by the exhaust resistance changing means.
Inventors
- 👤 Manabu Mukai
- 👤 Shigeo Kato
- 👤 Shinichi Wakutani
- 👤 Shoji Imai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:24
CPC Classifications
F; F02; F02B; F02B37/00; F02B37/007; F01; F01N; F01N1/00; F01N1/16; F01N1/166; F01N13/00; F01N13/011; F02D; F02D37/00; F02D41/00; F02D41/0002; F02D41/0007; F02D43/00; F01N13/08; F01N13/10; F01N13/107; F01N2410/00; F01N2410/10; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
174 words
A fuel control apparatus of an engine comprising; fuel supply means for supplying fuel to the engine; intake pressure detecting means for detecting an intake pressure of an intake passageway through which intake air is fed into the engine; fuel control means for controlling the fuel supply means so that an amount of the fuel supplied to the engine corresponds to the intake pressure on the basis of a signal outputted from the intake pressure detecting means; exhaust resistance changing means for changing an exhaust resistance of an exhaust passageway through which gas is exhausted from the engine according to the operating condition of the engine; and correction means for correcting a supply amount of the fuel to be controlled by the fuel control means when the exhaust resistance of the exhaust passageway is changed by the exhaust resistance changing means; wherein the correction means performs correction in such a manner that the amount of fuel supplied from the fuel supply means is increased when the exhaust resistance of the exhaust passageway is reduced.
Claim 2
Dependent Claim
174 words
A fuel control apparatus of an engine comprising; fuel supply means for supplying fuel to the engine; intake pressure detecting means for detecting an intake pressure of an intake passageway through which intake air is fed into the engine; fuel control means for controlling the fuel supply means so that an amount of the fuel supplied to the engine corresponds to the intake pressure on the basis of a signal outputted from the intake pressure detecting means; exhaust resistance changing means for changing an exhaust resistance of an exhaust passageway through which gas is exhausted from the engine according to the operating condition of the engine; and correction means for correcting a supply amount of the fuel to be controlled by the fuel control means when the exhaust resistance of the exhaust passageway is changed by the exhaust resistance changing means; wherein the correction means performs correction in such a manner that the amount of fuel supplied from the fuel supply means is increased when the exhaust resistance of the exhaust passageway is reduced.
Claim 3
Dependent Claim
65 words
A fuel control apparatus of an engine according to claim 1, wherein the exhaust resistance changing means comprises; primary and secondary turbosuperchargers which are provided in parallel with each other in the exhaust passageway of the engine, and an exhaust cutoff valve provided in an exhaust passageway through which the exhaust gas is fed into the secondary turbosupercharger for opening and closing the exhaust passageway.
Claim 4
Dependent Claim
80 words
A fuel control apparatus of an engine according to claim 1, wherein the exhaust resistance changing means is a variable silencer provided in the exhaust passageway of the engine, the variable silencer including; short and long exhaust passageways provided in parallel with each other and having passageway lengths which are different from each other for exhausting the air from a silencer body, and a switching valve provided in the short exhaust passageway for opening and closing the short exhaust passageway.
Claim 5
Dependent Claim
57 words
A fuel control apparatus of an engine according to claim 1, wherein the fuel control means controls the fuel supply means in such a manner that the fuel is supplied from the fuel supply means to the engine when the exhaust resistance changing means is operated so as to reduce the exhaust resistance of the exhaust passageway.
Claim 6
Dependent Claim
65 words
A fuel control apparatus of an engine according to claim 1, wherein the exhaust resistance changing means includes primary and secondary turbosuperchargers which are provided in parallel with each other in the exhaust passageway of the engine, and an exhaust cutoff valve provided in an exhaust passageway through which the exhaust gas is fed into the secondary turbosupercharger for opening and closing the exhaust passageway.
Claim 7
Dependent Claim
80 words
A fuel control apparatus of an engine according to claim 1, wherein the exhaust resistance changing means is a variable silencer provided in the exhaust passageway of the engine, the variable silencer including short and long exhaust passageways provided in parallel with each other and having passageway lengths which are different from each other for exhausting the air from a silencer body and a switching valve provided in the short exhaust passageway for opening and closing the short exhaust passageway.
Claim 8
Dependent Claim
57 words
A fuel control apparatus of an engine according to claim 1, wherein the fuel control means controls the fuel supply means in such a manner that the fuel is supplied from the fuel supply means to the engine when the exhaust resistance changing means is operated so as to reduce the exhaust resistance of the exhaust passageway.
Claim 9
Dependent Claim
57 words
A fuel control apparatus of an engine according to claim 2, wherein the fuel control means controls the fuel supply means in such a manner that the fuel is supplied from the fuel supply means to the engine when the exhaust resistance changing means is operated so as to reduce the exhaust resistance of the exhaust passageway.
Claim 10
Dependent Claim
55 words
A fuel control apparatus of an engine according to claim 2, wherein the exhaust resistance changing means further includes exhaust passageway control means for closing the exhaust cutoff valve when the intake air flow to the engine is small and opening the exhaust cutoff valve when the intake air flow to the engine is great.
Claim 11
Dependent Claim
57 words
A fuel control apparatus of an engine according to claim 3, wherein the fuel control means controls the fuel supply means in such a manner that the fuel is supplied from the fuel supply means to the engine when the exhaust resistance changing means is operated so as to reduce the exhaust resistance of the exhaust passageway.
Claim 12
Dependent Claim
55 words
A fuel control apparatus of an engine according to claim 5, wherein the exhaust resistance changing means further includes exhaust passageway control means for closing the exhaust cutoff valve when the intake air flow to the engine is small and opening the exhaust cutoff valve when the intake air flow to the engine is great.
Claim 13
Dependent Claim
55 words
A fuel control apparatus of an engine according to claim 8, wherein the exhaust resistance changing means further includes exhaust passageway control means for closing the exhaust cutoff valve when the intake air flow to the engine is small and opening the exhaust cutoff valve when the intake air flow to the engine is great.
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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) | 1996-04-12 | 1996-10-12 | 1997-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-12 | 2000-10-12 | 2001-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-12 | 2004-10-12 | 2005-04-13 | $7700.00 | Window Closed / Lapsed |