US4889084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve control device with magnetic valve for internal combustion engines
Assignee: Robert Bosch GmbH
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Filing: 1989-02-17
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Granted: 1989-12-26
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Expires: 2009-02-17
Abstract
Abstract A hydraulic valve control device for internal combustion engines having a magnetic valve for controlling the opening and closing time of an inlet or outlet valve in which the fluid pressed out of the stroke transmission chamber by the engine valve springs is stored in a reservoir chamber integrated with the magnetic valve; the reservoir chamber, by displacing the valve member backward, functions as a reservoir piston in the opening direction. A spring acting upon the valve member in the closing direction of the magnetic valve presses the fluid back into the stroke transmission chamber, which now is expanding one again. The magnetic valve communicates with the stroke transmission chamber through the shortest possible fluid conduit.
Inventors
- 👤 Helmut Rembold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:10
CPC Classifications
F; F01; F01L; F01L13/00; F01L13/0015; F01L13/0031; 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: 31
Claim 1
Independent Claim
154 words
A valve control device for controlling the opening and closing time of a cylinder valve (10) of an internal combustion engine, the cylinder valve being actuated by a valve control cam (14) of a camshaft (13) via an axially displaceable valve tappet (12), a stroke transmission chamber (29) disposed between the valve control cam and the valve tappet and a conduit for varying the axial length of said stroke transmission chamber between the valve control cam and the valve tappet said conduit is controllable by a magnetic valve (31) for draining out and supplying fluid, said conduit discharging at one end in a fluid reservoir (36), said fluid reservoir (36) is integrated with the magnetic valve (31) and by deflection of a valve member (38) of said magnetic valve (31) develops into a reservoir piston in the opening direction past a position that opens up a flow opening (37) to said fluid reservoir (36).
Claim 2
Dependent Claim
154 words
A valve control device for controlling the opening and closing time of a cylinder valve (10) of an internal combustion engine, the cylinder valve being actuated by a valve control cam (14) of a camshaft (13) via an axially displaceable valve tappet (12), a stroke transmission chamber (29) disposed between the valve control cam and the valve tappet and a conduit for varying the axial length of said stroke transmission chamber between the valve control cam and the valve tappet said conduit is controllable by a magnetic valve (31) for draining out and supplying fluid, said conduit discharging at one end in a fluid reservoir (36), said fluid reservoir (36) is integrated with the magnetic valve (31) and by deflection of a valve member (38) of said magnetic valve (31) develops into a reservoir piston in the opening direction past a position that opens up a flow opening (37) to said fluid reservoir (36).
Claim 3
Dependent Claim
29 words
A valve control device as defined by claim 1, in which said magnetic valve (31) is connected with a fluid line (30) directly to the stroke transmission chamber (29).
Claim 4
Dependent Claim
57 words
A valve control device as defined by claim 1, which includes a first spring (43) acting in an open direction and engages said valve member (38) connected to an armature (39) of an electromagnet (40), said first spring presses the valve member (38) against a stop (46), in a position that opens up the flow opening (37).
Claim 5
Dependent Claim
57 words
A valve control device as defined by claim 2, which includes a first spring (43) acting in an open direction and engages said valve member (38) connected to an armature (39) of an electromagnet (40), said first spring presses the valve member (38) against a stop (46), in a position that opens up the flow opening (37).
Claim 6
Dependent Claim
86 words
A valve control device as defined by claim 3, in which said stop (46) is resiliently embodied and is loaded by a second spring (47), acting in a closing direction of said valve member (38) and supported on the control valve housing (42), the force of which said second spring is greater than that of the first spring, so that said valve member (38), upon overcoming the second spring (47), as the reservoir piston, deflects in an opening direction and thereby forms the reservoir chamber (36).
Claim 7
Dependent Claim
86 words
A valve control device as defined by claim 4, in which said stop (46) is resiliently embodied and is loaded by a second spring (47), acting in a closing direction of said valve member (38) and supported on the control valve housing (42), the force of which said second spring is greater than that of the first spring, so that said valve member (38), upon overcoming the second spring (47), as the reservoir piston, deflects in an opening direction and thereby forms the reservoir chamber (36).
Claim 8
Dependent Claim
98 words
A valve control device as defined by claim 1, in which for pressure equalization upon the movements of the valve member (38), a magnet armature chamber (49) communicates, via a bore (50) in a wall of a control valve housing (42), with a crankcase, and that the reservoir chamber case, and that the reservoir chamber (36) likewise communicates with the crankcase, via a throttle bore (51) in the control valve housing (42) and a pressure maintenance valve (52) opening toward the crankcase, in order to prevent the pressure in the reservoir chamber (36) from exceeding a maximum value.
Claim 9
Dependent Claim
98 words
A valve control device as defined by claim 2, in which for pressure equalization upon the movements of the valve member (38), a magnet armature chamber (49) communicates, via a bore (50) in a wall of a control valve housing (42), with a crankcase, and that the reservoir chamber case, and that the reservoir chamber (36) likewise communicates with the crankcase, via a throttle bore (51) in the control valve housing (42) and a pressure maintenance valve (52) opening toward the crankcase, in order to prevent the pressure in the reservoir chamber (36) from exceeding a maximum value.
Claim 10
Dependent Claim
98 words
A valve control device as defined by claim 3, in which for pressure equalization upon the movements of the valve member (38), a magnet armature chamber (49) communicates, via a bore (50) in a wall of a control valve housing (42), with a crankcase, and that the reservoir chamber case, and that the reservoir chamber (36) likewise communicates with the crankcase, via a throttle bore (51) in the control valve housing (42) and a pressure maintenance valve (52) opening toward the crankcase, in order to prevent the pressure in the reservoir chamber (36) from exceeding a maximum value.
Claim 11
Dependent Claim
98 words
A valve control device as defined by claim 4, in which for pressure equalization upon the movements of the valve member (38), a magnet armature chamber (49) communicates, via a bore (50) in a wall of a control valve housing (42), with a crankcase, and that the reservoir chamber case, and that the reservoir chamber (36) likewise communicates with the crankcase, via a throttle bore (51) in the control valve housing (42) and a pressure maintenance valve (52) opening toward the crankcase, in order to prevent the pressure in the reservoir chamber (36) from exceeding a maximum value.
Claim 12
Dependent Claim
74 words
A valve control device as defined by claim 7, in which a pressure equalization between the reservoir chamber (36) and the magnet armature chamber (49) is attained via a throttle bore (51a) in the valve member (38), and that the magnet armature chamber (49) communicates with the crankcase via suitable lines, via a pressure maintenance valve (54) opening toward the crankcase and via a check valve (55) opening toward the magnet armature chamber (49).
Claim 13
Dependent Claim
74 words
A valve control device as defined by claim 8, in which a pressure equalization between the reservoir chamber (36) and the magnet armature chamber (49) is attained via a throttle bore (51a) in the valve member (38), and that the magnet armature chamber (49) communicates with the crankcase via suitable lines, via a pressure maintenance valve (54) opening toward the crankcase and via a check valve (55) opening toward the magnet armature chamber (49).
Claim 14
Dependent Claim
74 words
A valve control device as defined by claim 9, in which a pressure equalization between the reservoir chamber (36) and the magnet armature chamber (49) is attained via a throttle bore (51a) in the valve member (38), and that the magnet armature chamber (49) communicates with the crankcase via suitable lines, via a pressure maintenance valve (54) opening toward the crankcase and via a check valve (55) opening toward the magnet armature chamber (49).
Claim 15
Dependent Claim
74 words
A valve control device as defined by claim 10, in which a pressure equalization between the reservoir chamber (36) and the magnet armature chamber (49) is attained via a throttle bore (51a) in the valve member (38), and that the magnet armature chamber (49) communicates with the crankcase via suitable lines, via a pressure maintenance valve (54) opening toward the crankcase and via a check valve (55) opening toward the magnet armature chamber (49).
Claim 16
Dependent Claim
60 words
A valve control device as defined by claim 1, in which said valve member (38') is embodied as a hollow cylinder, having a reservoir piston (56) that is radially tightly guided and axially displaceable in the valve member (38'), which piston is acted upon by the fluid flowing out of the stroke transmission chamber (29) into the reservoir chamber (36).
Claim 17
Dependent Claim
60 words
A valve control device as defined by claim 2, in which said valve member (38') is embodied as a hollow cylinder, having a reservoir piston (56) that is radially tightly guided and axially displaceable in the valve member (38'), which piston is acted upon by the fluid flowing out of the stroke transmission chamber (29) into the reservoir chamber (36).
Claim 18
Dependent Claim
60 words
A valve control device as defined by claim 3, in which said valve member (38') is embodied as a hollow cylinder, having a reservoir piston (56) that is radially tightly guided and axially displaceable in the valve member (38'), which piston is acted upon by the fluid flowing out of the stroke transmission chamber (29) into the reservoir chamber (36).
Claim 19
Dependent Claim
23 words
A valve control device as defined by claim 15, in which an upper portion of the control valve housing (42) forms a stop.
Claim 20
Dependent Claim
45 words
A valve control device as defined by claim 15, in which said reservoir piston (56) is loaded by a spring (58) that is supported in the valve member (38') and presses the reservoir piston (56) against a stop (59) disposed on the valve member (38').
Claim 21
Dependent Claim
45 words
A valve control device as defined by claim 18, in which said reservoir piston (56) is loaded by a spring (58) that is supported in the valve member (38') and presses the reservoir piston (56) against a stop (59) disposed on the valve member (38').
Claim 22
Dependent Claim
48 words
A valve control device as defined by claim 15, in which said valve member (38') has a recess (62) on the side of the magnet armature (39) through which the piston spring chamber (61) communicates with the crankcase via a recess (63) in the magnetic valve housing (42).
Claim 23
Dependent Claim
48 words
A valve control device as defined by claim 18, in which said valve member (38') has a recess (62) on the side of the magnet armature (39) through which the piston spring chamber (61) communicates with the crankcase via a recess (63) in the magnetic valve housing (42).
Claim 24
Dependent Claim
34 words
A valve control device as defined by claim 15, in which said reservoir chamber (36) communicates with the crankcase via a throttle bore 51 and a pressure maintenance valve (52) opening toward the crankcase.
Claim 25
Dependent Claim
34 words
A valve control device as defined by claim 18, in which said reservoir chamber (36) communicates with the crankcase via a throttle bore (51) and a pressure maintenance valve (52) opening toward the crankcase.
Claim 26
Dependent Claim
34 words
A valve control device as defined by claim 19, in which said reservoir chamber (36) communicates with the crankcase via a throttle bore (51) and a pressure maintenance valve (52) opening toward the crankcase.
Claim 27
Dependent Claim
34 words
A valve control device as defined by claim 21, in which said reservoir chamber (36) communicates with the crankcase via a throttle bore (51) and a pressure maintenance valve (52) opening toward the crankcase.
Claim 28
Dependent Claim
72 words
A valve control device as defined by claim 15, which includes a throttle bore in the reservoir piston (56), said throttle bore effects a pressure equalization between the reservoir chamber (36) and the piston spring chamber (61), and that the piston spring chamber (61) communicates with the crankcase via suitable lines, via a pressure maintenance valve opening toward the crankcase and via a check valve opening toward the piston spring chamber (61).
Claim 29
Dependent Claim
72 words
A valve control device as defined by claim 18, which includes a throttle bore in the reservoir piston (56), said throttle bore effects a pressure equalization between the reservoir chamber (36) and the piston spring chamber (61), and that the piston spring chamber (61) communicates with the crankcase via suitable lines, via a pressure maintenance valve opening toward the crankcase and via a check valve opening toward the piston spring chamber (61).
Claim 30
Dependent Claim
72 words
A valve control device as defined by claim 19, which includes a throttle bore in the reservoir piston (56), said throttle bore effects a pressure equalization between the reservoir chamber (36) and the piston spring chamber (61), and that the piston spring chamber (61) communicates with the crankcase via suitable lines, via a pressure maintenance valve opening toward the crankcase and via a check valve opening toward the piston spring chamber (61).
Claim 31
Dependent Claim
72 words
A valve control device as defined by claim 21, which includes a throttle bore in the reservoir piston (56), said throttle bore effects a pressure equalization between the reservoir chamber (36) and the piston spring chamber (61), and that the piston spring chamber (61) communicates with the crankcase via suitable lines, via a pressure maintenance valve opening toward the crankcase and via a check valve opening toward the piston spring chamber (61).
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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) | 1992-12-25 | 1993-06-26 | 1993-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-25 | 1997-06-26 | 1997-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-25 | 2001-06-26 | 2001-12-26 | $7700.00 | Window Closed / Lapsed |