US3913547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel control systems
Assignee: Lucas Electrical Co Ltd
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Filing: 1974-02-19
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Granted: 1975-10-21
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Expires: 1994-02-19
Abstract
Abstract An engine fuel control system including a mass flow measuring device which measures the mass flow of air to the engine and a pump which is driven by a motor at a speed dependent on the electrical output of the measuring device. The pump delivers fuel to nozzles in the engine air inlet manifold downstream of the throttle valve.
Inventors
- 👤 Philip Rossell Wentworth
- 👤 John Anthony Jeyes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:25
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/18
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
124 words
In a fuel control system for an engine of a vehicle having an induction manifold, the improvement comprising a mass flow measuring device for producing a continuous electrical signal representative of the mass flow of air in the induction manifold of a vehicle engine, a pump for feeding fuel to the engine at a rate dependent upon the speed of operation of the pump, a motor for continuously driving the pump, the speed of the motor being variable in accordance with said electrical signal, said motor being a synchronous a.c. motor, and a variable frequency oscillator connected to said mass flow measuring device and to said motor to drive the latter, said oscillator having a frequency which is determined by said continuous electrical signal.
Claim 2
Dependent Claim
124 words
In a fuel control system for an engine of a vehicle having an induction manifold, the improvement comprising a mass flow measuring device for producing a continuous electrical signal representative of the mass flow of air in the induction manifold of a vehicle engine, a pump for feeding fuel to the engine at a rate dependent upon the speed of operation of the pump, a motor for continuously driving the pump, the speed of the motor being variable in accordance with said electrical signal, said motor being a synchronous a.c. motor, and a variable frequency oscillator connected to said mass flow measuring device and to said motor to drive the latter, said oscillator having a frequency which is determined by said continuous electrical signal.
Claim 3
Dependent Claim
34 words
An engine fuel control system as claimed in claim 1 further comprising a device for independently varying the frequency of said variable frequency oscillator in accordance with at least one additional engine operating parameter.
Claim 4
Dependent Claim
18 words
An engine fuel control system as claimed in claim 1 in which said pump is a gear pump.
Claim 5
Dependent Claim
62 words
An engine fuel control system as claimed in claim 1 in which the induction manifold of the engine has a butterfly-type throttle valve therein having a hollow spindle formed with apertures perpendicular to the general plane of the butterfly valve, said hollow spindle being connected to the pump so that fuel is discharged in use into the induction manifold through said apertures.
Claim 6
Dependent Claim
125 words
In a fuel control system for an engine of a vehicle having an induction manifold, the improvement comprising a mass flow measuring device for producing a continuous electrical signal representative of the mass flow of air in the induction manifold of a vehicle engine, a pump for feeding fuel to the engine at a Rate dependent upon the speed of operation of the pump, a motor for continuously driving the pump, the speed of the motor being variable in accordance with said electrical signal, said motor being a d.c. motor, and a comparator connected to said mass flow measuring device and to said motor such that said continuous electrical signal is supplied to the comparator which controls the speed of the motor in response thereto.
Claim 7
Dependent Claim
125 words
In a fuel control system for an engine of a vehicle having an induction manifold, the improvement comprising a mass flow measuring device for producing a continuous electrical signal representative of the mass flow of air in the induction manifold of a vehicle engine, a pump for feeding fuel to the engine at a Rate dependent upon the speed of operation of the pump, a motor for continuously driving the pump, the speed of the motor being variable in accordance with said electrical signal, said motor being a d.c. motor, and a comparator connected to said mass flow measuring device and to said motor such that said continuous electrical signal is supplied to the comparator which controls the speed of the motor in response thereto.
Claim 8
Dependent Claim
18 words
An engine fuel control system as claimed in claim 5 in which said pump is a gear pump.
Claim 9
Dependent Claim
62 words
An engine fuel control system as claimed in claim 5 in which the induction manifold of the engine has a butterfly-type throttle valve therein having a hollow spindle formed with apertures perpendicular to the general plane of the butterfly valve, said hollow spindle being connected to the pump so that fuel is discharged in use into the induction manifold through said apertures.
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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |