Patent US4332227A successfully refreshed from Google Patents.
US4332227A
Expired / Lapsed
US
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Injection timing device for internal combustion engines
Assignee: Robert Bosch GmbH
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Filing: 1981-04-27
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Granted: 1982-06-01
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Expires: 2001-04-27
Abstract
Abstract An injection timing device is proposed for internal combustion engines, by means of which the mutual rotary position of the output shaft with respect to the input shaft can be varied in dependence on the speed and on at least one further operating parameter. The timing device comprises flyweights, operating in dependence on the speed against the force of resetting springs, and hydraulically operated control elements which engage the flyweights, these control elements, which are effective radially toward the outside, being accommodated within the timing element. By changing the position of the control elements, the radial position of the flyweights, which otherwise is determined only by centrifugal force, can be additionally varied in dependence on at least one further operating parameter of the engine, preferably the load, in order to correct the instant of injection.
Inventors
- 👤 Otto Bauer
- 👤 Leonhard Eberl
- 👤 Gerhard Geyer
- 👤 Max Straubel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:09
CPC Classifications
F; F16; F16D; F16D3/00; F16D3/02; F16D3/10; F02; F02D; F02D1/00; F02D1/16; F02D1/18; F02D1/183
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
163 words
Injection timing device for diesel combustion engines provided with flyweights which operate in dependence on the engine speed against the force of resetting springs, said device further including an adjusting gear system for connecting an input shaft with an output shaft, said shafts further having a mutually variable rotary position, each said flyweight being directly coupled with one hydraulically operable control element, and said control element arranged to directly change the position of said flyweight, under the force of the pressure of the hydraulic medium which is variable in dependence on at least one operating parameter of the engine, further wherein said hydraulic control elements are mounted within said timing device perpendicular to the longitudinal axis of said input shaft so that they directly engage the flyweights and act radially outwardly resulting from increasing pressure on said control elements and further wherein said control elements move simultaneously with said flyweights to modify the position of said flyweights to correct the instant of injection.
Claim 2
Dependent Claim
163 words
Injection timing device for diesel combustion engines provided with flyweights which operate in dependence on the engine speed against the force of resetting springs, said device further including an adjusting gear system for connecting an input shaft with an output shaft, said shafts further having a mutually variable rotary position, each said flyweight being directly coupled with one hydraulically operable control element, and said control element arranged to directly change the position of said flyweight, under the force of the pressure of the hydraulic medium which is variable in dependence on at least one operating parameter of the engine, further wherein said hydraulic control elements are mounted within said timing device perpendicular to the longitudinal axis of said input shaft so that they directly engage the flyweights and act radially outwardly resulting from increasing pressure on said control elements and further wherein said control elements move simultaneously with said flyweights to modify the position of said flyweights to correct the instant of injection.
Claim 3
Dependent Claim
42 words
Injection timing device according to claim 1, further wherein said control elements include servo pistons which are guided in a piston carrier provided with associated cylinder bores and said piston carrier being supported on a guide member connected to the output shaft.
Claim 4
Dependent Claim
28 words
Injection timing device according to claim 2, further wherein said flyweights are each provided with bore means and one piston carrier is arranged in each said bore means.
Claim 5
Dependent Claim
34 words
Injection timing device according to claim 3, further wherein said piston carrier includes radially outwardly oriented, hollow-cylindrical arms said arms including an outer surface which serves as a sliding guide means for the flyweights.
Claim 6
Dependent Claim
40 words
Injection timing device according to claim 2, further wherein said guide member includes means for supporting said piston carrier and said cylinder bores are formed by a transverse bore which extends crosswise through the longitudinal axis of said timing device.
Claim 7
Dependent Claim
36 words
Injection timing device according to claim 5, further wherein the said means in said guide member and a section provided on said piston carrier which receives said cylinder bores are axially offset relative to one another.
Claim 8
Dependent Claim
37 words
Injection timing device according to claim 1, further wherein said control elements include pistons which are connected fixedly with a piston carrier supported on a guide member, said guide member further being connected to said output shaft.
Claim 9
Dependent Claim
32 words
Injection timing device according to claim 4, further wherein said flyweights are provided with cylinder bores which extend from the center of the longitudinal axis of said timing device radially outwardly thereof.
Claim 10
Dependent Claim
68 words
Injection timing device according to claim 1, further wherein said adjusting gear mechanism further includes a pair of eccentrics comprising an adjusting eccentric and a compensating eccentric, said pair of eccentrics being disposed in a bearing member firmly connected to one of said shafts, and further wherein said adjusting eccentrics are coupled by means of transmitting members to said flyweights as well as to said hydraulic control elements.
Claim 11
Dependent Claim
42 words
Injection timing device according to claim 9, further wherein said transmitting members which serve as the coupling means between said control elements and said adjusting eccentrics, are provided with connecting pins arranged in parallel to the longitudinal axis of the timing device.
Claim 12
Dependent Claim
26 words
Injection timing device according to claim 10, further wherein one of said connecting pins is connected, via a fishplate, with a second of said connecting pins.
Claim 13
Dependent Claim
50 words
Injection timing device according to claim 1, further wherein said hydraulic medium is fed to pressure chambers associated with said control elements by means of a conduit which projects into said timing device and is mounted in the axial center of the latter by means of a fluid-tight ball-and-socket joint.
Claim 14
Dependent Claim
47 words
Injection timing device according to claim 1, further wherein said pressure of said hydraulic medium fed to the control elements is determinable by a control device arranged outside of the timing device in dependence on the load (Q) and/or on further operating parameters (T) of the engine.
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) | 1985-05-31 | 1985-11-30 | 1986-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-31 | 1989-11-30 | 1990-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-31 | 1993-11-30 | 1994-06-01 | $7700.00 | Window Closed / Lapsed |