US3620202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel supply devices for cold starting of internal combustion engines
Assignee: Zenith Carburetter Co Ltd
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Filing: 1969-12-08
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Granted: 1971-11-16
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Expires: 1989-12-08
Abstract
Abstract A fuel supply device for supplying fuel to provide a coldstarting mixture in an internal combustion engine in which fuel is expelled from a chamber into the engine induction system by movement of a movable wall of the chamber which movement is caused by means dependent on the initiation of an engine-starting operation, the volume of the chamber being controlled by thermostatic means dependent on engine temperature so that the quantity of fuel available is greater when the engine temperature at starting is lower. Fuel is fed automatically into the chamber as its volume increases due to fall of temperature, and the outlet from the chamber is closed by a valve when its volume is reduced to a minimum.
Inventors
- 👤 Gray E D Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:42
CPC Classifications
F; F02; F02M; F02M1/00; F02M1/16; F02B; F02B1/00; F02B1/02; F02B1/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
199 words
A fuel supply device for supplying fuel to an internal combustion engine for starting the engine from cold, comprising a fuel chamber bounded on one side by a movable wall biassing means acting on said movable wall to provide a continuously acting force tending to enlarge the volume of said fuel chamber, stop means opposing movement of said movable wall by said biassing means, thermostatically controlled means operative to adjust the position of said stop means so as to permit movement of said movable wall by said biassing means with decrease of temperature to enlarge the volume of said fuel chamber, means to supply fuel to said chamber automatically as its volume increases, through a nonreturn valve, passage means to connect said chamber to the induction system of an engine, means dependent on the initiation of an engine starting operation to produce a thrust on said movable wall acting to move it so as to reduce the volume of said chamber and expel fuel therefrom into the engine induction system, and valve means operated by movement of said movable wall and acting to close said passage means when said movable wall, during its fuel-expelling movement, reaches a predetermined position.
Claim 2
Dependent Claim
199 words
A fuel supply device for supplying fuel to an internal combustion engine for starting the engine from cold, comprising a fuel chamber bounded on one side by a movable wall biassing means acting on said movable wall to provide a continuously acting force tending to enlarge the volume of said fuel chamber, stop means opposing movement of said movable wall by said biassing means, thermostatically controlled means operative to adjust the position of said stop means so as to permit movement of said movable wall by said biassing means with decrease of temperature to enlarge the volume of said fuel chamber, means to supply fuel to said chamber automatically as its volume increases, through a nonreturn valve, passage means to connect said chamber to the induction system of an engine, means dependent on the initiation of an engine starting operation to produce a thrust on said movable wall acting to move it so as to reduce the volume of said chamber and expel fuel therefrom into the engine induction system, and valve means operated by movement of said movable wall and acting to close said passage means when said movable wall, during its fuel-expelling movement, reaches a predetermined position.
Claim 3
Dependent Claim
39 words
A fuel supply device according to claim 1, wherein a control orifice is provided in the passage means which connect the said chamber to the engine induction system to control the rate of flow of fuel from said chamber.
Claim 4
Dependent Claim
39 words
A fuel supply device according to claim 2, wherein a profiled needle carried by the movable wall, cooperates with the control orifice to vary the rate of flow of fuel through the control orifice as the movable wall moves.
Claim 5
Dependent Claim
60 words
A fuel supply device according to claim 1, wherein the movable wall separates the said chamber from a second chamber adapted to be connected to the engine fuel supply system on the downstream side of the fuel pump of said system so that the pressure of fuel delivered by the fuel pump provides the thrust to move the movable wall.
Claim 6
Dependent Claim
16 words
A fuel supply device according to claim 1, wherein the movable wall is a flexible diaphragm.
Claim 7
Dependent Claim
70 words
A fuel supply system according to claim 1, wherein the valve means acting to close said passage means comprise a resilient-sealing member carried by the movable wall and including a conical portion adapted to enter and close the end of said passage means opening into the chamber from which said passage means lead, and a lip to engage the wall of said chamber around said end of the passage means.
Claim 8
Dependent Claim
34 words
A fuel supply system according to claim 1, wherein a rod extending through and fixed to the movable wall cooperates with a stop the position of which is determined by the thermostatically controlled means.
Claim 9
Dependent Claim
54 words
A fuel supply device according to claim 7, wherein a profiled needle is carried by the rod and cooperates with a control orifice in the passage means which connects said fuel chamber to the engine induction system to vary the rate of flow of fuel through the control orifice as the movable wall moves.
Claim 10
Dependent Claim
26 words
A fuel supply system according to claim 6 wherein the resIlient sealing member is mounted on a rod extending through and fixed to the movable wall.
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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |