US4096830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for electrically energized engine fuel
Assignee: Honeywell International Inc
•
Filing: 1975-11-06
•
Granted: 1978-06-27
•
Expires: 1995-11-06
Abstract
Abstract A control system for a positive displacement, electrically actuated fuel pump receives one trigger pulse per engine cycle during normal operating conditions and a plurality of pulses per cycle during starting conditions from a computer circuit forming part of a fuel injection system. A control circuit generates one driving pulse for the fuel pump for each trigger pulse as long as the period between the pulses remains sufficient for the pump to complete its cycle and deletes control pulses to the pump when the engine speed is excessively high. A variable displacement electric pump is controlled to provide the engine with a fuel flow proportional to its operating rate by a variable on-time switching system controlled by an engine speed sensor and/or load sensor.
Inventors
- 👤 E. David Long
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:57
CPC Classifications
F; F02; F02M; F02M51/00; F02M51/06; F02M51/061; F02M51/0625; F02M51/0635; F02M51/0639; F02D; F02D21/00; F02D21/06; F02D21/08; F02D41/00; F02D41/30; F02D41/32; F02M37/00; F02M37/04; F02M37/08; F02M51/005; F02M51/08; F02M55/00; F02M55/04; F02M61/00; F02M61/16; F02M61/165; F02M69/00; F02M69/04; F04; F04B; F04B11/00; F04B11/0008; F04B11/0033; F04B17/00; F04B17/03; F04B17/04; F04B17/046; F04B53/00; F04B53/10; F04B53/102; F04B53/1035; F04B9/00; F04B9/02; F04B9/06
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
138 words
A control system for a fuel pump for a spark ignited, internal combustion engine having a fuel injection system, said fuel pump being a solenoid actuated, positive variable displacement piston pump; said control system comprising: means connected to the engine for generating an electric signal which varies as engine speed; and means controlled by said electric signal for generating one trigger pulse per engine cycle to said pump for energizing the solenoid of the pump to reset the piston once per engine cycle to provide a fuel flow at a rate which is a function of said signal, said means for generating one trigger pulse comprising counter means for generating said pulse, gate means for permitting delivery of said pulse to said solenoid once per engine cycle and pulse forming means for changing the duration of said pulse.
Claim 2
Dependent Claim
138 words
A control system for a fuel pump for a spark ignited, internal combustion engine having a fuel injection system, said fuel pump being a solenoid actuated, positive variable displacement piston pump; said control system comprising: means connected to the engine for generating an electric signal which varies as engine speed; and means controlled by said electric signal for generating one trigger pulse per engine cycle to said pump for energizing the solenoid of the pump to reset the piston once per engine cycle to provide a fuel flow at a rate which is a function of said signal, said means for generating one trigger pulse comprising counter means for generating said pulse, gate means for permitting delivery of said pulse to said solenoid once per engine cycle and pulse forming means for changing the duration of said pulse.
Claim 3
Dependent Claim
31 words
The control system of claim 1 and further comprising: means for increasing the operating rate of the fuel pump during starting of the engine relative to its rate under non-starting conditions.
Claim 4
Dependent Claim
69 words
The control system of claim 1, wherein said internal combustion engine has a starter switch and said control system includes means responsive to actuation of said starter switch for generating a plurality of trigger pulses, and delivering said plurality of pulses sequentially to said pump once per engine cycle for energizing the solenoid of said pump to reset the piston a plurality of times per engine cycle during starting.
Claim 5
Dependent Claim
17 words
The control system of claim 1 wherein the pulses have a frequency directly proportional to engine speed.
Claim 6
Dependent Claim
22 words
The system of claim 4 wherein the means for energizing the pump under control of said electric signal comprises a pulse generator.
Claim 7
Dependent Claim
36 words
The system of claim 1 wherein said means for controlling the rate of operation of the fuel pump comprises an electric power supply operative to supply the pump with actuating pulses proportional to said electric signal.
Claim 8
Dependent Claim
24 words
The system of claim 6 and further comprising means for deleting said actuating pulses to said pump when engine speed exceeds a predetermined value.
Claim 9
Dependent Claim
138 words
A control system for a fuel pump for a spark ignited, internal combustion engine having a fuel injection system, said fuel pump being a solenoid actuated, positive variable displacement piston pump; said control system comprising: means connected to the engine for generating an electric signal which varies as engine load; and means controlled by said electric signal for generating one trigger pulse per engine cycle to said pump for energizing the solenoid of the pump to reset the piston once per engine cycle to provide a fuel flow at a rate which is a function of said signal, said means for generating one trigger pulse comprising counter means for generating said pulse, gate means for permitting delivery of said pulse to said solenoid once per engine cycle and pulse forming means for changing the duration of said pulse.
Claim 10
Dependent Claim
138 words
A control system for a fuel pump for a spark ignited, internal combustion engine having a fuel injection system, said fuel pump being a solenoid actuated, positive variable displacement piston pump; said control system comprising: means connected to the engine for generating an electric signal which varies as engine load; and means controlled by said electric signal for generating one trigger pulse per engine cycle to said pump for energizing the solenoid of the pump to reset the piston once per engine cycle to provide a fuel flow at a rate which is a function of said signal, said means for generating one trigger pulse comprising counter means for generating said pulse, gate means for permitting delivery of said pulse to said solenoid once per engine cycle and pulse forming means for changing the duration of said pulse.
Claim 11
Dependent Claim
47 words
The control system of claim 8 wherein the fuel pump is of the positive, variable displacement type and said means for controlling the rate of operation of the fuel pump comprises an electric power supply operative to supply the pump with a current proportional to said signal.
Claim 12
Dependent Claim
29 words
The control system of claim 8 including means for increasing the operating rate of the fuel pump during starting of the engine relative to its rate under non-starting conditions.
Claim 13
Dependent Claim
17 words
The control system of claim 8 wherein said pulses have a frequency directly proportional to engine speed.
Claim 14
Dependent Claim
34 words
The control system of claim 11 wherein the fuel pump is of the positive, variable displacement type and the means for energizing the pump under control of said electric signal comprises a pulse generator.
Claim 15
Dependent Claim
190 words
A control system for a fuel pump for a spark ignited, internal combustion engine having a fuel injection system, said fuel pump being a solenoid actuated, positive variable displacement piston pump; said control system comprising: means connected to the engine for generating an electric signal which varies as engine speed; and means controlled by said electric signal for generating one trigger pulse per engine cycle to said pump for energizing the solenoid of the pump to reset the piston once per engine cycle to provide a fuel flow at a rate which is a function of said signal, said means for generating one trigger pulse comprising counter means for generating said pulse, gate means for permitting delivery of said pulse to said solenoid once per engine cycle and pulse forming means for changing the duration of said pulse, said means for controlling the rate of operation of the fuel pump comprising an electric power supply operative to supply the pump with actuating pulses proportional to said electric signal, and said control system further comprising means for deleting said actuating pulses to said pump when engine speed exceeds a predetermined value.
Claim 16
Dependent Claim
190 words
A control system for a fuel pump for a spark ignited, internal combustion engine having a fuel injection system, said fuel pump being a solenoid actuated, positive variable displacement piston pump; said control system comprising: means connected to the engine for generating an electric signal which varies as engine speed; and means controlled by said electric signal for generating one trigger pulse per engine cycle to said pump for energizing the solenoid of the pump to reset the piston once per engine cycle to provide a fuel flow at a rate which is a function of said signal, said means for generating one trigger pulse comprising counter means for generating said pulse, gate means for permitting delivery of said pulse to said solenoid once per engine cycle and pulse forming means for changing the duration of said pulse, said means for controlling the rate of operation of the fuel pump comprising an electric power supply operative to supply the pump with actuating pulses proportional to said electric signal, and said control system further comprising means for deleting said actuating pulses to said pump when engine speed exceeds a predetermined value.
Claim 17
Dependent Claim
49 words
The system of claim 13, wherein said means for generating one trigger pulse per engine cycle includes counter means for generating said pulse, gate means for permitting delivery of said pulse to said solenoid once per engine cycle and pulse forming means for changing the duration of said pulse.
Claim 18
Dependent Claim
36 words
The system of claim 13 wherein said means for controlling the rate of operation of the fuel pump comprises an electric power supply operative to supply the pump with actuating pulses proportional to said electric signal.
Claim 19
Dependent Claim
17 words
The control system of claim 13 wherein the pulses have a frequency directly proportional to engine speed.
Claim 20
Dependent Claim
22 words
The system of claim 16 whrein the means for energizing the pump under control of said electric signal comprises a pulse generator.
References Cited (Backward Citations)
GB568216A
Cited
US2966902A
Cited
FR1228832A
Cited
US3465732A
Cited
US3669081A
Cited
US3693603A
Cited
US3886921A
Cited
US3822677A
Cited
US3867918A
Cited
GB1414172A
Cited
US3889648A
Cited
US3994272A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-26 | 1981-12-26 | 1982-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-26 | 1985-12-26 | 1986-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-26 | 1989-12-26 | 1990-06-27 | $7700.00 | Window Closed / Lapsed |