US4762095A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for actuating a fuel-exchange poppet valve of a reciprocating internal-combustion engine
Assignee: Dr Ing HCF Porsche AG
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Filing: 1987-05-18
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Granted: 1988-08-09
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Expires: 2007-05-18
Abstract
Abstract A fuel-exchange poppet valve of a reciprocating internal-combustion engine is actuated by two electromagnets that, in an alternating way, are energized periodically to attract an armature disk arranged between them. The armature disk is fastened at an armature that is coupled to a one-armed fuel-exchange poppet valve control lever. The control lever is pivotally moved back and forth against the spring tension of a torsional bar spring to open and close a poppet valve.
Inventors
- 👤 Hans Mezger
- 👤 Reinhard Konneker
- 👤 Hans-Joachim Esch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:35
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/12; F01L1/14; F01L1/16; F01L9/00; F01L9/20; F01L1/46; F01L1/462; F01L9/21; F01L2009/2105; F01L2009/2109
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
140 words
A device for actuating a fuel-exchange poppet valve of a reciprocating combustion engine, comprising: a pivotable valve control lever having a first movable portion engageable with a poppet valve shaft of a poppet valve to move the poppet valve between open and closed positions in response to pivotal movement of the valve control lever about its bearing center; movable armature means connected to a second portion of the valve control lever; electromagnetic means for selectively moving the armature means to thereby forcibly pivotably move the valve control lever between respective open and closed positions of the poppet valve; and torsion bar spring means connected to the valve control lever for resiliently resisting movement of the valve control lever from an unstressed position of the torsion bar spring means toward both the respective open and closed positions of the poppet valve.
Claim 2
Independent Claim
140 words
A device for actuating a fuel-exchange poppet valve of a reciprocating combustion engine, comprising: a pivotable valve control lever having a first movable portion engageable with a poppet valve shaft of a poppet valve to move the poppet valve between open and closed positions in response to pivotal movement of the valve control lever about its bearing center; movable armature means connected to a second portion of the valve control lever; electromagnetic means for selectively moving the armature means to thereby forcibly pivotably move the valve control lever between respective open and closed positions of the poppet valve; and torsion bar spring means connected to the valve control lever for resiliently resisting movement of the valve control lever from an unstressed position of the torsion bar spring means toward both the respective open and closed positions of the poppet valve.
Claim 3
Dependent Claim
100 words
A device according to claim 1, wherein the first movable portion of the valve control lever is at a free end of the valve control lever, wherein the armature means is pivotally connected to the second portion of the valve control lever by means of an armature pivotal connection disposed between the free end and a bearing center pivotal connection of the valve control lever at its opposite end, and wherein the torsion bar spring means has one portion fixed to the pivotal bearing center of the valve control lever and another portion fixed to a fixed vehicle engine part.
Claim 4
Dependent Claim
41 words
A device according to claim 2, wherein the distance between the coupling joint of the armature to the longitudinal axis of the poppet valve is shorter than the distance between the coupling joint and the bearing center of the valve lever.
Claim 5
Dependent Claim
30 words
A device according to claim 2, wherein the valve lever is formed as a fork means that extends from its free end to slightly beyond the joint armature privotal connection.
Claim 6
Dependent Claim
27 words
A device according to claim 4, wherein the fork means is applied at the poppet valve rigidly in its opening direction and elastically in its closing direction.
Claim 7
Dependent Claim
66 words
A device according to claim 5, wherein the fork means, in closing direction of the poppet valve, rests against a sliding sleeve that is guided longitudinally on the poppet valve shaft, said sliding sleeve, being supported by means of a coil spring at a holding sleeve fastened on the poppet valve shaft, said sliding sleeve and said holding sleeve being a short distance from one another.
Claim 8
Dependent Claim
21 words
A device according to claim 2, wherein the closing movement of the poppet valve is dampened by a hydraulic damping device.
Claim 9
Dependent Claim
41 words
A device according to claim 7, wherein the damping device includes a damping sleeve that is fastened at an end face on the poppet valve shaft, an oil-filled damping cylinder equipped with damping disks, an oil inlet bore, and throttling gaps.
Claim 10
Dependent Claim
34 words
A device according to claim 2, wherein the valve control lever is formed as a bearing tube on its bearing center end, said bearing tube being disposed in bearing blocks at both its sides.
Claim 11
Dependent Claim
40 words
A device according to claim 9, wherein the torsion bar spring projects with one of its ends through the bearing tube and is connected with the bearing tube in the area of one bearing block in a torsionally fixed way.
Claim 12
Dependent Claim
44 words
A device according to claim 10, wherein the torsion bar spring with its other end remote from the valve control lever is clamped into a holding bush in a torsionally fixed way, said holding bush being flanged onto a cylinder head of an engine.
Claim 13
Dependent Claim
23 words
A device according to claim 11, wherein a rotating position of the holding bush can be adjusted by a swiveling in elongated holes.
Claim 14
Dependent Claim
21 words
A device according to claim 2, wherein said valve control lever is developed for a simultaneous actuating of two poppet valves.
Claim 15
Dependent Claim
20 words
A device according to claim 4, wherein said valve control lever is developed for simultaneous actuating of two poppet valves.
Claim 16
Dependent Claim
20 words
A device according to claim 7, wherein said valve control lever is developed for simultaneous actuating of two poppet valves.
Claim 17
Dependent Claim
20 words
A device according to claim 12, wherein said valve control lever is developed for simultaneous actuating of two poppet valves.
Claim 18
Independent Claim
260 words
A device for actuating a fuel-exchange poppet valve of a reciprocating combustion engine, comprising: a pivotable valve control lever having a first movable portion engageable with a poppet valve shaft of a poppet valve to move the poppet valve between open and closed positions in response to pivotal movement of the valve control lever about its bearing center; movable armature means connected to a second portion of the valve control lever; electromagnetic means for selectively moving the armature means to thereby forcibly pivotably move the valve control lever between the respective open and closed positions of the poppet valve; and torsion bar spring means connected to the valve control lever for resiliently resisting movement of the valve control lever toward the respective open and closed positions of the poppet valve; wherein the first movable portion of the valve control lever is at a free end of the valve control lever, wherein the armature means is pivotally connected to the second position of the valve control lever by means of an armature pivotal connection disposed between the free end and a bearing center pivotal connection of the valve control lever at its opposite end, and wherein the torsion bar spring means has one portion fixed to the pivotal bearing center of the valve control lever and another portion fixed to a fixed vehicle engine part; and wherein the distance between the coupling joint of the armature to the longitudinal axis of the poppet valve is shorter than the distance between the coupling joint and the bearing center of the valve lever.
Claim 19
Independent Claim
260 words
A device for actuating a fuel-exchange poppet valve of a reciprocating combustion engine, comprising: a pivotable valve control lever having a first movable portion engageable with a poppet valve shaft of a poppet valve to move the poppet valve between open and closed positions in response to pivotal movement of the valve control lever about its bearing center; movable armature means connected to a second portion of the valve control lever; electromagnetic means for selectively moving the armature means to thereby forcibly pivotably move the valve control lever between the respective open and closed positions of the poppet valve; and torsion bar spring means connected to the valve control lever for resiliently resisting movement of the valve control lever toward the respective open and closed positions of the poppet valve; wherein the first movable portion of the valve control lever is at a free end of the valve control lever, wherein the armature means is pivotally connected to the second position of the valve control lever by means of an armature pivotal connection disposed between the free end and a bearing center pivotal connection of the valve control lever at its opposite end, and wherein the torsion bar spring means has one portion fixed to the pivotal bearing center of the valve control lever and another portion fixed to a fixed vehicle engine part; and wherein the distance between the coupling joint of the armature to the longitudinal axis of the poppet valve is shorter than the distance between the coupling joint and the bearing center of the valve lever.
Claim 20
Independent Claim
274 words
A device for actuating a fuel-exchange poppet valve of a reciprocating combustion engine, comprising: a pivotable valve control lever having a first movable portion engageable with a poppet valve shaft of a poppet valve to move the poppet valve between open and closed positions in response to pivotal movement of the valve control lever about its bearing center; movable armature means connected to a second portion of the valve control lever; electromagnetic means for selectively moving the armature means to thereby forcibly pivotably move the valve control lever between respective open and closed positions of the poppet valve; and torsion bar spring means connected to the valve control lever for resiliently resisting movement of the valve control lever toward the respective open and closed positions of the poppet valve; wherein the first movable portion of the valve control lever is at a free end of the valve control lever, wherein the armature means is pivotally connected to the second position of the valve control lever by means of an armature pivotal connection disposed between the free end and a bearing center pivotal connection of the valve control lever at its opposite end, and wherein the torsion bar spring means has one portion fixed to the pivotal bearing center of the valve control lever and another portion fixed to a fixed vehicle engine part; wherein the closing movement of the poppet valve is dampened by a hydraulic damping device; and wherein the damping device includes a damping sleeve that is fastened at an end face on the poppet valve shaft, an oil-filled damping cylinder equipped with damping disks, an oil inlet bore, and throttling gaps.
Claim 21
Independent Claim
274 words
A device for actuating a fuel-exchange poppet valve of a reciprocating combustion engine, comprising: a pivotable valve control lever having a first movable portion engageable with a poppet valve shaft of a poppet valve to move the poppet valve between open and closed positions in response to pivotal movement of the valve control lever about its bearing center; movable armature means connected to a second portion of the valve control lever; electromagnetic means for selectively moving the armature means to thereby forcibly pivotably move the valve control lever between respective open and closed positions of the poppet valve; and torsion bar spring means connected to the valve control lever for resiliently resisting movement of the valve control lever toward the respective open and closed positions of the poppet valve; wherein the first movable portion of the valve control lever is at a free end of the valve control lever, wherein the armature means is pivotally connected to the second position of the valve control lever by means of an armature pivotal connection disposed between the free end and a bearing center pivotal connection of the valve control lever at its opposite end, and wherein the torsion bar spring means has one portion fixed to the pivotal bearing center of the valve control lever and another portion fixed to a fixed vehicle engine part; wherein the closing movement of the poppet valve is dampened by a hydraulic damping device; and wherein the damping device includes a damping sleeve that is fastened at an end face on the poppet valve shaft, an oil-filled damping cylinder equipped with damping disks, an oil inlet bore, and throttling gaps.
References Cited (Backward Citations)
US1549636A
Cited
GB288749A
Cited
US2041539A
Cited
US2401480A
Cited
US2534621A
Cited
US2819705A
Cited
DE1120804B
Cited
US3358659A
Cited
US3633556A
Cited
US3683874A
Cited
DE2057667A1
Cited
US3882833A
Cited
FR2377525A1
Cited
US4269388A
Cited
JPS59103907A
Cited
EP0118591A1
Cited
GB2137420A
Cited
US4593658A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-09 | 1992-02-08 | 1992-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-09 | 1996-02-08 | 1996-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-09 | 2000-02-08 | 2000-08-09 | $7700.00 | Window Closed / Lapsed |