US4510902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel supply control in deceleration of an internal combustion engine for vehicles
Assignee: Mazda Motor Corp
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Filing: 1983-04-04
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Granted: 1985-04-16
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Expires: 2003-04-04
Abstract
Abstract A vehicle including an internal combustion engine having a fuel supply system for providing a supply of fuel, a deceleration detecting device for detecting that the engine is in deceleration, a heater having heat exchanger for bringing air in the vehicle into a heat exchange relationship with engine cooling medium so that the air in the vehicle is heated by the engine cooling medium, a heater operation detecting device for detecting that the heater is in operation, a fuel supply control device responsive to outputs of the deceleration detecting device and the heater operation detecting device for interrupting the supply of fuel when the engine is in deceleration and the heater is not in operation.
Inventors
- 👤 Tsuyoshi Tsuchida
- 👤 Yoshinobu Kido
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:59
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/04; F02D41/12; F02D41/123; F02M; F02M3/00; F02M3/02; F02M3/04; F02M3/045
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
117 words
A motor vehicle including an internal combustion engine having a fuel supply system for providing a supply of fuel, deceleration detecting means for detecting that the engine is in deceleration, heating means having heat exchanging means for bringing air in the vehicle into a heat exchange relationship with an engine cooling medium so that said air in the vehicle is heated by the engine cooling medium, heater operation detecting means for detecting that the heating means is in operation, fuel supply control means responsive to outputs of said deceleration detecting means and said heater operation detecting means for interrupting the supply of fuel when the engine is in deceleration and the heating means is not in operation.
Claim 2
Dependent Claim
117 words
A motor vehicle including an internal combustion engine having a fuel supply system for providing a supply of fuel, deceleration detecting means for detecting that the engine is in deceleration, heating means having heat exchanging means for bringing air in the vehicle into a heat exchange relationship with an engine cooling medium so that said air in the vehicle is heated by the engine cooling medium, heater operation detecting means for detecting that the heating means is in operation, fuel supply control means responsive to outputs of said deceleration detecting means and said heater operation detecting means for interrupting the supply of fuel when the engine is in deceleration and the heating means is not in operation.
Claim 3
Dependent Claim
71 words
A motor vehicle in accordance with claim 1 in which the engine is further provided with engine temperature detecting means for producing an engine temperature signal which is applied to the fuel supply control means, said fuel supply control means including means for interrupting the supply of fuel when the engine is in deceleration and the heating means is not in operation and the engine temperature is above a predetermined value.
Claim 4
Dependent Claim
167 words
A motor vehicle including an internal combustion engine having a fuel supply system for providing a supply of fuel, engine temperature detecting means, deceleration detecting means for detecting that the engine is in deceleration, heating means having heat exchanging means for bringing air in the vehicle into a heat exchange relationship with an engine cooling medium so that said air in the vehicle is heated by the engine cooling medium, heater operation detecting means for detecting that the heating means is in operation, fuel supply control means responsive to outputs of said engine temperature detecting means, said deceleration detecting means and said heater operation detecting means for interrupting the supply of fuel when the engine is in deceleration, the heating means is in operation and the engine temperature is above a first predetermined value, annd also when the engine is in deceleration, the heating means is not in operation and the engine temperature is above a second predetermined value which is lower than the first predetermined value.
Claim 5
Dependent Claim
167 words
A motor vehicle including an internal combustion engine having a fuel supply system for providing a supply of fuel, engine temperature detecting means, deceleration detecting means for detecting that the engine is in deceleration, heating means having heat exchanging means for bringing air in the vehicle into a heat exchange relationship with an engine cooling medium so that said air in the vehicle is heated by the engine cooling medium, heater operation detecting means for detecting that the heating means is in operation, fuel supply control means responsive to outputs of said engine temperature detecting means, said deceleration detecting means and said heater operation detecting means for interrupting the supply of fuel when the engine is in deceleration, the heating means is in operation and the engine temperature is above a first predetermined value, annd also when the engine is in deceleration, the heating means is not in operation and the engine temperature is above a second predetermined value which is lower than the first predetermined value.
Claim 6
Dependent Claim
58 words
A motor vehicle in accordance with claim 3 in which said fuel supply control means includes comparing means for comparing the output from the engine temperature detecting means with a reference signal so as to interrupt the fuel supply when the engine temperature is above the second predetermined value in deceleration with the heating means not in operation.
Claim 7
Dependent Claim
180 words
A motor vehicle including an internal combustion engine having a fuel supply system for providing a supply of fuel, engine temperature detecting means, engine speed detecting means, deceleration detecting means for detecting that the engine is in deceleration, heating means having heat exchanging means for bringing air in the vheicle into a heat exchange relationship with an engine cooling medium so that said air in the vehicle is heated by the engine cooling medium, heater operation detecting means for detecting that the heating means is in operation, fuel supply control means responsive to outputs of said engine temperature detecting means, said engine speed detecting means, said deceleration detecting means and said heater operation detecting means for interrupting the supply of fuel when the engine is in deceleration and the engine speed is greater than a first predetermined value, and also when the engine is in deceleration and the engine speed is greater than a second predetermined value which is larger than the first predetermined value and the heater means is in operation with the engine temperature below a predetermined value.
Claim 8
Dependent Claim
180 words
A motor vehicle including an internal combustion engine having a fuel supply system for providing a supply of fuel, engine temperature detecting means, engine speed detecting means, deceleration detecting means for detecting that the engine is in deceleration, heating means having heat exchanging means for bringing air in the vheicle into a heat exchange relationship with an engine cooling medium so that said air in the vehicle is heated by the engine cooling medium, heater operation detecting means for detecting that the heating means is in operation, fuel supply control means responsive to outputs of said engine temperature detecting means, said engine speed detecting means, said deceleration detecting means and said heater operation detecting means for interrupting the supply of fuel when the engine is in deceleration and the engine speed is greater than a first predetermined value, and also when the engine is in deceleration and the engine speed is greater than a second predetermined value which is larger than the first predetermined value and the heater means is in operation with the engine temperature below a predetermined value.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-15 | 1988-10-15 | 1989-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-15 | 1992-10-15 | 1993-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-15 | 1996-10-15 | 1997-04-16 | $7700.00 | Window Closed / Lapsed |