US3924593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection apparatus for internal combustion engines
Assignee: GKN Automotive Ltd
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Filing: 1974-01-31
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Granted: 1975-12-09
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Expires: 1994-01-31
Abstract
Abstract A fuel injection apparatus in which the setting of a metering means is controlled by a conical cam movable axially and rotationally respectively by an evacuated bellows sensing absolute air pressure in an inlet duct of the apparatus and by the rotational output element of an addition mechanism receiving mechanical inputs from two temperature sensing elements, one sensing the temperature of the inlet air and the other sensing a further selected temperature parameter, the addition mechanism comprising two sleeves which are rotationally coupled but relatively axially slidable in response to inputs from the temperature sensing elements, one sleeve being connected to the body of the apparatus through a helical slot and pin connection, and the other sleeve being connected to an output element for rotating the bellows through a helical slot and pin connection.
Inventors
- 👤 Brian Colin Pagdin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:26
CPC Classifications
F; F02; F02M; F02M69/00; F02M69/12; F02M69/125; F02D; F02D41/00; F02D41/02; F02D41/14; F02D41/1438; F02D41/1444; F02D41/1446
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
326 words
In fuel injection apparatus for an internal combustion engine such apparatus comprising a body affording an air inlet duct, a fuel pump means for establishing flow of fuel to an outlet means, the outlet means being connected or adapted for connection to one or more fuel injectors, metering means operative between the pump and the outlet means and adapted to be driven in timed relation with the crankshaft or other rotary output member of the engine for delivering a measured quantity of fuel to the outlet means in each cycle of operation of the engine, and sensing means for controlling operation of the metering means and sensing parameters selected to provide a proper air to fuel ratio for a range of engine loads and a range of external conditions of operation, such sensing means comprising a plurality of sensing elements each providing a mechanical output, and mechanical addition means having input elements corresponding in number to the said sensing elements, an output element, and means for algebraically adding displacements imparted to said input elements and applying the resultant to the said output element, the improvement wherein said mechanical addition means comprises: a. sleeves movable relatively to each other lengthwise of an axis, each sleeve having an axially extending slot slidably receiving an axially extending limb of the other sleeve for coupling said elements to each other for rotation in unison about said axis b. means for generating an increment of rotation in response to movement of each of said sleeves lengthwise of said axis c. means for connecting one of said sleeves to said body and the other said sleeve to said metering means whereby the algebraic sum of said increments of rotation is transmitted to said metering means d. each of said sensing elements comprising a mounting part and a output part movable relatively to the mounting part lengthwise of said axis with said output part associated operatively with a respective one of said sleeves.
Claim 2
Dependent Claim
326 words
In fuel injection apparatus for an internal combustion engine such apparatus comprising a body affording an air inlet duct, a fuel pump means for establishing flow of fuel to an outlet means, the outlet means being connected or adapted for connection to one or more fuel injectors, metering means operative between the pump and the outlet means and adapted to be driven in timed relation with the crankshaft or other rotary output member of the engine for delivering a measured quantity of fuel to the outlet means in each cycle of operation of the engine, and sensing means for controlling operation of the metering means and sensing parameters selected to provide a proper air to fuel ratio for a range of engine loads and a range of external conditions of operation, such sensing means comprising a plurality of sensing elements each providing a mechanical output, and mechanical addition means having input elements corresponding in number to the said sensing elements, an output element, and means for algebraically adding displacements imparted to said input elements and applying the resultant to the said output element, the improvement wherein said mechanical addition means comprises: a. sleeves movable relatively to each other lengthwise of an axis, each sleeve having an axially extending slot slidably receiving an axially extending limb of the other sleeve for coupling said elements to each other for rotation in unison about said axis b. means for generating an increment of rotation in response to movement of each of said sleeves lengthwise of said axis c. means for connecting one of said sleeves to said body and the other said sleeve to said metering means whereby the algebraic sum of said increments of rotation is transmitted to said metering means d. each of said sensing elements comprising a mounting part and a output part movable relatively to the mounting part lengthwise of said axis with said output part associated operatively with a respective one of said sleeves.
Claim 3
Dependent Claim
89 words
The improvement according to claim 1 wherein: a. The means for generating said increment of rotation in response to axial displacement of one of said sleeves comprises means for establishing a helical slot and pin connection between said sleeve and said body, b. The means for generating said increment of rotation in response to axial displacement of the other of said sleeves comprises means for establishing helical slot and pin connection between said sleeve and the output element rotatable about said axis and operatively connected to said metering means.
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) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |