US3612008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum-responsive voltage generator for a fuel injection system
Assignee: Carter Automotive Co Inc
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Filing: 1970-02-16
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Granted: 1971-10-12
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Expires: 1990-02-16
Abstract
Abstract An arrangement for generating an irregularly varying voltage for an automobile fuel injection system includes a potentiometer having a plurality of voltage input taps connected to taps on a voltage divider, and an output tap movable along the potentiometer by a vacuum motor which responds to the pressure in the intake manifold of the automobile engine. The voltage input taps are elongated and are adjustable longitudinally and angularly to provide the required voltage distribution on the potentiometer.
Inventors
- 👤 Richard B Beishir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:39
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; H; H01; H01C; H01C10/00; H01C10/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
149 words
In a fuel injection system for an automobile internal combustion engine including a potentiometer controlling the rate of fuel injection; means for applying voltage to the potentiometer, the potentiometer having a movable output tap, and vacuum sensing means connected to the intake manifold of the engine for moving the output tap in accordance with the pressure in the intake manifold; electronic control circuit means having its input connected to the movable tap of the potentiometer and its output connected to a plurality of electronically operated fuel injection valves; the improvement consisting in that the potentiometer includes an elongated resistive member having a series of input taps spaced longitudinally therealong; means for mounting each input tap for longitudinal adjustment and independent transverse adjustment toward and away from the path of the output tap, said means for applying voltage being connected to each input tap for applying independently adjustable voltages thereto.
Claim 2
Dependent Claim
149 words
In a fuel injection system for an automobile internal combustion engine including a potentiometer controlling the rate of fuel injection; means for applying voltage to the potentiometer, the potentiometer having a movable output tap, and vacuum sensing means connected to the intake manifold of the engine for moving the output tap in accordance with the pressure in the intake manifold; electronic control circuit means having its input connected to the movable tap of the potentiometer and its output connected to a plurality of electronically operated fuel injection valves; the improvement consisting in that the potentiometer includes an elongated resistive member having a series of input taps spaced longitudinally therealong; means for mounting each input tap for longitudinal adjustment and independent transverse adjustment toward and away from the path of the output tap, said means for applying voltage being connected to each input tap for applying independently adjustable voltages thereto.
Claim 3
Dependent Claim
41 words
Apparatus according to claim 1 wherein said input taps have an elongated substantially linear contact with said resistive member and each of said input taps is adjusted transversely by rotating the line of contact of each tap on the resistive member.
Claim 4
Dependent Claim
209 words
In a fuel injection system for an automobile internal combustion engine including a potentiometer controlling the rate of fuel injection; means for applying voltage to the potentiometer, the potentiometer having a movable output tap, and vacuum sensing means connected to the intake manifold of the engine for moving the output tap in accordance with the pressure in the intake manifold; electronic control circuit means having its input connected to the movable tap of the potentiometer and its output connected to a plurality of electronically operated fuel injection valves; the improvement consisting in that the potentiometer includes an elongated flat resistive strip having resistive material on at least one surface thereof; a row of input taps on one side of the resistive strip spaced longitudinally therealong, the path of the movable tap being parallel to and near one edge of said resistive strip, said means for applying voltage being connected to the input taps for applying progressively increasing adjustable voltages thereto, each of said input taps having an elongated narrow edge in contact with said surface of the resistive strip; and means for mounting said input taps for limited longitudinal adjustment along the resistive strip and for rotation of the elongated edge of each input taP on the resistive strip.
Claim 5
Dependent Claim
209 words
In a fuel injection system for an automobile internal combustion engine including a potentiometer controlling the rate of fuel injection; means for applying voltage to the potentiometer, the potentiometer having a movable output tap, and vacuum sensing means connected to the intake manifold of the engine for moving the output tap in accordance with the pressure in the intake manifold; electronic control circuit means having its input connected to the movable tap of the potentiometer and its output connected to a plurality of electronically operated fuel injection valves; the improvement consisting in that the potentiometer includes an elongated flat resistive strip having resistive material on at least one surface thereof; a row of input taps on one side of the resistive strip spaced longitudinally therealong, the path of the movable tap being parallel to and near one edge of said resistive strip, said means for applying voltage being connected to the input taps for applying progressively increasing adjustable voltages thereto, each of said input taps having an elongated narrow edge in contact with said surface of the resistive strip; and means for mounting said input taps for limited longitudinal adjustment along the resistive strip and for rotation of the elongated edge of each input taP on the resistive strip.
Claim 6
Dependent Claim
32 words
Apparatus according to claim 3, wherein each input tap is turnable for setting the line of contact thereof with the resistive strip to any angle between a longitudinal and a transverse position.
Claim 7
Dependent Claim
60 words
Apparatus according to claim 4, wherein the input taps have an inverted T-shape consisting of a stem perpendicular to the surface of the resistive strip and a blade at the end of the stem having an elongated edge in contact with the surface of the resistive strip, said stem being rotatable on its axis for turning the elongated edge thereof.
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) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |