US5542395A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature-compensated engine fuel delivery
Assignee: TI Group Automotive Systems LLC
•
Filing: 1993-11-15
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Granted: 1996-08-06
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Expires: 2013-11-15
Abstract
Abstract A fuel delivery system for an internal combustion engine that includes a fuel pump responsive to application of electrical power for delivering fuel under pressure to the engine. A pressure sensor supplies a pressure signal as a function of fuel pump output pressure. Electrical circuitry is responsive to the pressure signal for applying electrical power to the pump. A temperature sensor is operatively coupled to the circuitry for automatically varying the pump power signal to increase fuel pump output pressure when temperature at the temperature sensor exceeds preselected threshold temperature.
Inventors
- 👤 Charles H. Tuckey
- 👤 Kirk D. Doane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:42
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/30; F02D41/3082; F02D2200/00; F02D2200/02; F02D2200/06; F02D2200/0606; F02D2250/00; F02D2250/02; F02D41/38; F02D41/3809; F02M; F02M37/00; F02M37/04; F02M37/08; F02M2037/085; F02M2037/087
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
160 words
A fuel delivery system for an internal combustion engine that comprises: a fuel supply with a fuel pump responsive to application of electrical power for supplying fuel under pressure, fuel delivery means at the engine, a non-return fuel line between said pump and said fuel delivery means, and means for applying electrical power to said pump comprising: a fuel pressure sensor for providing an electrical pressure signal as a function of fuel pump outlet pressure, circuit means responsive to said electrical pressure signal for applying electrical power to said pump, and a temperature sensor responsive to fuel temperature and operatively coupled to said circuit means for automatically varying power applied to said pump to maintain a preselected constant fuel pressure characteristic at the engine when temperature at said temperature sensor is below a preselected threshold temperature, and to increase pump output pressure as a preselected function of temperature at said temperature sensor when said temperature exceeds said preselected threshold temperature.
Claim 2
Dependent Claim
160 words
A fuel delivery system for an internal combustion engine that comprises: a fuel supply with a fuel pump responsive to application of electrical power for supplying fuel under pressure, fuel delivery means at the engine, a non-return fuel line between said pump and said fuel delivery means, and means for applying electrical power to said pump comprising: a fuel pressure sensor for providing an electrical pressure signal as a function of fuel pump outlet pressure, circuit means responsive to said electrical pressure signal for applying electrical power to said pump, and a temperature sensor responsive to fuel temperature and operatively coupled to said circuit means for automatically varying power applied to said pump to maintain a preselected constant fuel pressure characteristic at the engine when temperature at said temperature sensor is below a preselected threshold temperature, and to increase pump output pressure as a preselected function of temperature at said temperature sensor when said temperature exceeds said preselected threshold temperature.
Claim 3
Dependent Claim
15 words
The system set forth in claim 1 wherein said preselected function is a step function.
Claim 4
Dependent Claim
15 words
The system set forth in claim 2 wherein said threshold temperature is about 200° F.
Claim 5
Dependent Claim
19 words
The system set forth in claim 1 wherein said increase in pump output pressure is about 15 to 20%.
Claim 6
Dependent Claim
15 words
The system set forth in claim 1 wherein said preselected function is a linear function.
Claim 7
Dependent Claim
15 words
The system set forth in claim 5 wherein said temperature threshold is about 100° F.
Claim 8
Dependent Claim
38 words
The system set forth in claim 6 wherein said temperature sensor is operatively coupled to said circuit means to increase pump output pressure linearly for a temperature of about 100° F. to a temperature of about 250° F.
Claim 9
Dependent Claim
25 words
The system set forth in claim 7 wherein said increase in pump output pressure between 100° F. to 250° F. is about 15 to 20%
Claim 10
Dependent Claim
55 words
The system set forth in claim 1 wherein said fuel delivery means includes an engine fuel rail coupled to said pump by said non-return fuel line, both said temperature sensor and said pressure sensor being disposed on said fuel rail so as to be responsive respectively to temperature and pressure of fuel at said rail.
Claim 11
Dependent Claim
32 words
The system set forth in claim 9 wherein the engine further includes an engine air intake manifold, and wherein said pressure sensor receives a reference input from said engine air intake manifold.
Claim 12
Dependent Claim
37 words
The system set forth in claim 1 wherein said pressure sensor is integral with said temperature sensor for directly modifying said electrical signal generated at said pressure sensor as a function of temperature above said threshold temperature.
Claim 13
Dependent Claim
52 words
The system set forth in claim 1 wherein said temperature sensor provides an electrical temperature signal as a function of temperature, and wherein said circuit means includes means responsive to said temperature signal for modifying said electrical pressure signal from said pressure sensor as a function of temperature above said threshold temperature.
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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) | 1999-08-06 | 2000-02-05 | 2000-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-08-06 | 2004-02-05 | 2004-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-08-06 | 2008-02-05 | 2008-08-06 | $7700.00 | Window Closed / Lapsed |