Patent US2903246A successfully refreshed from Google Patents.
US5113812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve control apparatus with magnet valve for internal combustion engines
Assignee: Robert Bosch GmbH
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Filing: 1990-07-28
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Granted: 1992-05-19
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Expires: 2010-07-28
Abstract
Abstract A hydraulic drive control device for internal combustion engines, having a reservoir magnet valve for controlling a volume of oil in a stroke transmission chamber, in order to control a timing cross section of the engine valve, wherein the magnet valve is closed when without current, and the valve member, embodied as a reservoir piston, is loaded by a reservoir spring acting as a closing spring.
Inventors
- 👤 Helmut Rembold
- 👤 Ernst Linder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:12
CPC Classifications
F; F01; F01L; F01L9/00; F01L9/10; F01L9/11; F01L9/12; F01L9/14; F01L1/00; F01L1/34; F01L1/344; F01L1/3442; F01L2001/34423; F01L2001/34446
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
195 words
A valve control device for controlling a closing and opening time of an engine valve of an internal combustion engine, the valve being actuated by a valve control cam of a camshaft via an axially displaceable valve shaft, comprising a stroke transmission chamber disposed between the valve control cam and the valve shaft, a fluid flow conduit connected with said stroke transmission chamber by which said stroke transmission chamber is filled with fluid for varying its effective axial length between the valve control cam and the valve shaft, a magnet control valve, said fluid flow conduit is controllable by said magnet control valve, for draining and delivering the fluid, to said stroke transmission chamber, said conduit discharges on one end into a fluid reservoir in said magnet control valve, said fluid reservoir is integrated with a reservoir piston in said magnet control valve, said reservoir piston acts in an opening direction beyond a position that uncovers a flow opening from said fluid flow conduit, said reservoir piston of said magnet control valve (31) is closed when without current, and said reservoir piston (41) is loaded by a reservoir spring (45) acting as a closing spring.
Claim 2
Dependent Claim
195 words
A valve control device for controlling a closing and opening time of an engine valve of an internal combustion engine, the valve being actuated by a valve control cam of a camshaft via an axially displaceable valve shaft, comprising a stroke transmission chamber disposed between the valve control cam and the valve shaft, a fluid flow conduit connected with said stroke transmission chamber by which said stroke transmission chamber is filled with fluid for varying its effective axial length between the valve control cam and the valve shaft, a magnet control valve, said fluid flow conduit is controllable by said magnet control valve, for draining and delivering the fluid, to said stroke transmission chamber, said conduit discharges on one end into a fluid reservoir in said magnet control valve, said fluid reservoir is integrated with a reservoir piston in said magnet control valve, said reservoir piston acts in an opening direction beyond a position that uncovers a flow opening from said fluid flow conduit, said reservoir piston of said magnet control valve (31) is closed when without current, and said reservoir piston (41) is loaded by a reservoir spring (45) acting as a closing spring.
Claim 3
Dependent Claim
99 words
A valve control device as defined by claim 1, in which said reservoir piston (41) is embodied as cup-shaped and has a cup bottom oriented toward the reservoir chamber (43), an edge (54) of said cup bottom cooperates with a valve seat (55) which exist between a valve inlet chamber (42) and the reservoir chamber (43), and said cup bottom is radially guided on an inner wall of the magnet control valve housing (40), and that a central tang (47), structurally connected to the housing, plunges as a magnet yoke into a cup opening of the reservoir piston (41).
Claim 4
Dependent Claim
39 words
A valve control device as defined by claim 2, in which a magnet coil (52) is disposed in an annular chamber of a magnet chamber (44) formed between the tang (47) and an inner wall of the housing (40).
Claim 5
Dependent Claim
27 words
A valve control device as defined by claim 2, in which a central bore (50) for relieving the magnet chamber (44) is present in the tang (47).
Claim 6
Dependent Claim
27 words
A valve control device as defined by claim 3, in which a central bore (50) for relieving the magnet chamber (44) is present in the tang (47).
Claim 7
Dependent Claim
31 words
A valve control device as defined by claim 2, in which a throttle opening (46) is present in the cup which divides the magnet chamber (44) from the reservoir chamber (43).
Claim 8
Dependent Claim
31 words
A valve control device as defined by claim 3, in which a throttle opening (46) is present in the cup which divides the magnet chamber (44) from the reservoir chamber (43).
Claim 9
Dependent Claim
31 words
A valve control device as defined by claim 4, in which a throttle opening (46) is present in the cup which divides the magnet chamber (44) from the reservoir chamber (43).
Claim 10
Dependent Claim
31 words
A valve control device as defined by claim 5, in which a throttle opening (46) is present in the cup which divides the magnet chamber (44) from the reservoir chamber (43).
Claim 11
Dependent Claim
41 words
A valve control device as defined by claim 2, in which the reservoir chamber (43) communicates with a crank case of said internal combustion engine via a throttle bore (56) and a check valve (38) opening toward the reservoir chamber (43).
Claim 12
Dependent Claim
41 words
A valve control device as defined by claim 3, in which the reservoir chamber (43) communicates with a crank case of said internal combustion engine via a throttle bore (56) and a check valve (38) opening toward the reservoir chamber (43).
Claim 13
Dependent Claim
41 words
A valve control device as defined by claim 4, in which the reservoir chamber (43) communicates with a crank case of said internal combustion engine via a throttle bore (56) and a check valve (38) opening toward the reservoir chamber (43).
Claim 14
Dependent Claim
41 words
A valve control device as defined by claim 5, in which the reservoir chamber (43) communicates with a crank case of said internal combustion engine via a throttle bore (56) and a check valve (38) opening toward the reservoir chamber (43).
Claim 15
Dependent Claim
41 words
A valve control device as defined by claim 6, in which the reservoir chamber (43) communicates with a crank case of said internal combustion engine via a throttle bore (56) and a check valve (38) opening toward the reservoir chamber (43).
Claim 16
Dependent Claim
42 words
A valve control device as defined by claim 2, in which the central tang (47) serves as a stroke stop of the reservoir piston (41), and that a reservoir spring (47) plunges partway into a blind bore (49) of the tang (47).
Claim 17
Dependent Claim
42 words
A valve control device as defined by claim 3, in which the central tang (47) serves as a stroke stop of the reservoir piston (41), and that a reservoir spring (47) plunges partway into a blind bore (49) of the tang (47).
Claim 18
Dependent Claim
42 words
A valve control device as defined by claim 4, in which the central tang (47) serves as a stroke stop of the reservoir piston (41), and that a reservoir spring (47) plunges partway into a blind bore (49) of the tang (47).
Claim 19
Dependent Claim
42 words
A valve control device as defined by claim 5, in which the central tang (47) serves as a stroke stop of the reservoir piston (41), and that a reservoir spring (47) plunges partway into a blind bore (49) of the tang (47).
Claim 20
Dependent Claim
42 words
A valve control device as defined by claim 6, in which the central tang (47) serves as a stroke stop of the reservoir piston (41), and that a reservoir spring (47) plunges partway into a blind bore (49) of the tang (47).
Claim 21
Dependent Claim
42 words
A valve control device as defined by claim 10, in which the central tang (47) serves as a stroke stop of the reservoir piston (41), and that a reservoir spring (47) plunges partway into a blind bore (49) of the tang (47).
Claim 22
Dependent Claim
35 words
A valve control device as defined by claim 3, in which a supply of current to the magnet coil (52) can be interrupted after the reservoir piston (41) has been lifted from the seat (54).
Claim 23
Dependent Claim
35 words
A valve control device as defined by claim 4, in which a supply of current to the magnet coil (52) can be interrupted after the reservoir piston (41) has been lifted from the seat (54).
Claim 24
Dependent Claim
35 words
A valve control device as defined by claim 5, in which a supply of current to the magnet coil (52) can be interrupted after the reservoir piston (41) has been lifted from the seat (54).
Claim 25
Dependent Claim
35 words
A valve control device as defined by claim 6, in which a supply of current to the magnet coil (52) can be interrupted after the reservoir piston (41) has been lifted from the seat (54).
Claim 26
Dependent Claim
35 words
A valve control device as defined by claim 10, in which a supply of current to the magnet coil (52) can be interrupted after the reservoir piston (41) has been lifted from the seat (54).
Claim 27
Dependent Claim
35 words
A valve control device as defined by claim 15, in which a supply of current to the magnet coil (52) can be interrupted after the reservoir piston (41) has been lifted from the seat (54).
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-05-19 | 1995-11-18 | 1996-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-19 | 1999-11-18 | 2000-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-19 | 2003-11-18 | 2004-05-19 | $7700.00 | Window Closed / Lapsed |