EP1706604A1 - Device from changing the control times of gas exchange valves in an internal combustion engine in particular a rotating piston adjustment device for angular adjustment of a camshaft relative to a crankshaft - Google Patents
Device from changing the control times of gas exchange valves in an internal combustion engine in particular a rotating piston adjustment device for angular adjustment of a camshaft relative to a crankshaftInfo
- Publication number
- EP1706604A1 EP1706604A1 EP04765996A EP04765996A EP1706604A1 EP 1706604 A1 EP1706604 A1 EP 1706604A1 EP 04765996 A EP04765996 A EP 04765996A EP 04765996 A EP04765996 A EP 04765996A EP 1706604 A1 EP1706604 A1 EP 1706604A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- impeller
- pressure medium
- drive wheel
- locking element
- combustion engine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 26
- 239000000463 material Substances 0.000 claims description 6
- 230000004888 barrier function Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims 1
- 230000002093 peripheral effect Effects 0.000 abstract description 4
- 230000007246 mechanism Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 238000009420 retrofitting Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
Definitions
- a rotary piston adjusting device for adjusting the angle of rotation of a camshaft relative to a crankshaft
- the invention relates to a device for changing the timing of gas exchange valves of an internal combustion engine according to the precharacterizing features of claim 1, and it can be realized particularly advantageously on a rotary piston adjusting device for adjusting the angle of rotation of a camshaft relative to a crankshaft.
- a generic device for changing the timing of gas exchange valves of an internal combustion engine which is attached to the drive end of a camshaft mounted in the cylinder head of an internal combustion engine and is designed in principle as a hydraulic actuator that can be controlled as a function of various operating parameters of the internal combustion engine
- This device essentially consists of a drive wheel which is in drive connection with the crankshaft of the internal combustion engine and an impeller which is connected in a rotationally fixed manner to the camshaft of the internal combustion engine, which are in power transmission connection with one another and transmit the torque of the crankshaft to the camshaft of the internal combustion engine.
- the drive wheel has a hollow cylindrical peripheral wall and two side walls.
- the impeller has on the circumference of its wheel hub five vanes which extend radially into the work spaces and which divide the work spaces into an A pressure chamber and a B pressure chamber, which, with optional or simultaneous pressurization with a hydraulic pressure medium, pivots or fixes the impeller against the drive wheel and thus the camshaft relative to the crankshaft.
- the impeller can be mechanically coupled to the drive wheel by means of a separate locking element in a preferred base position within its adjustment range, in particular when the internal combustion engine is restarted until the required one is built up Pressure medium pressure to avoid a rattling of the impeller on the boundary walls of the drive wheel resulting from the alternating torques of the camshaft.
- This locking element which is designed as a sleeve-like cylindrical pin, is arranged in a continuous axial bore in the wheel hub of the impeller and, by means of a spring element designed as a compression coil spring, which is supported on the one hand on the rear side of the locking element and on the other hand on a counterholder also inserted into the axial bore Locking position within a receptacle in the side wall of the drive wheel facing away from the camshaft.
- the inclusion of the locking element is connected to one of the A pressure chambers of the device via a pressure medium feed groove incorporated into the side surface facing away from the inner side of the camshaft, so that when the A pressure chambers are pressurized, the locking element is hydraulically moved into an unlocking position within the axial bore in the wheel hub of the Impeller is movable.
- a disadvantage of this known device is that the locking element for mechanically coupling the impeller to the drive wheel in its unlocked position also outside the base position of the impeller. gelrades via the pressure medium feed groove for receiving it in the side wall of the drive wheel is constantly in pressure medium connection with the corresponding A pressure chamber of the device, so that when the A pressure chambers are pressurized, the pressure medium pressure present and the pressure peaks of the pressure medium occurring also on the locking element or act on the entire locking mechanism.
- the pressurized locking element is supported on its counter-holder arranged in the axial bore of the wheel hub, and the counter-holder, which is usually made of plastic, is supported on the side wall of the drive wheel that closes the axial bore, the pressure medium pressure permanently acting on the locking element leads through the constant rotation between the relative values Impeller and the drive wheel thus increased wear on the counter holder and on the side wall of the drive wheel.
- this wear adversely affects the function of the locking mechanism and can lead to the failure of the function over the life of the device.
- the invention is therefore based on the object of designing a device for changing the control times of gas exchange valves of an internal combustion engine, in particular a rotary piston adjusting device for adjusting the angle of rotation of a camshaft relative to a crankshaft, in which this results from the constant pressure medium connection of the locking element with one of the pressure chambers of the device or the adverse effects resulting from the permanent pressurization of the locking element on the entire locking mechanism can be avoided in a simple manner.
- this object is achieved in a device according to the preamble of claim 1 such that within the pressure medium incorporated into the inner surface of the respective side wall of the drive wheel Feed groove a local lock is arranged through which the pressure medium supply for receiving the locking element is permanently interrupted when the impeller is pivoted out of the base position.
- a bypass is additionally arranged in the side surface of the wheel hub of the impeller opposite the pressure medium supply groove in such a way that only when the impeller is pivoted into the base position can the local lock be bridged and a pressure medium supply for receiving the locking element is possible.
- the locking element is designed in a known manner as a sleeve-like cylinder pin, which is arranged in a continuous axial bore in the wheel hub of the impeller and by a spring element designed as a compression coil spring, which is located on the one hand on the back of the locking element and on the other hand also in the axial bore supports the counterholder used, is displaceable in its locking position in the receptacle in one of the side walls of the drive wheel.
- the receptacle of the locking element is accordingly also formed in a known manner as a local depression in the inner surface of the side wall opposite the locking element, which has a preferably square-shaped contour that is larger than the cross-sectional area of the locking element by a defined clearance and in which the preferably has an arcuate course Pressure medium supply groove opens.
- the receptacle of the locking element designed in this way and its pressure medium supply groove are preferably arranged in the side wall facing away from the inner surface of the camshafts and are produced without cutting by stamping into this side wall, the local barrier in the pressure medium supply groove being preferred is formed as a material web remaining during embossing.
- stamping it is also possible to produce the receptacle of the locking element and its pressure medium supply groove by milling into the corresponding side wall of the drive wheel, and also to form the local lock in the pressure medium supply groove as a remaining material web.
- the bypass for the local lock in the pressure medium supply groove also in the side face of the wheel hub of the impeller facing away from the camshaft to be arranged and designed as an elongated hole-like depression. It has proven to be particularly advantageous to mold this slot-like depression in the usually powder-metallurgical manufacture of the wheel hub of the impeller into the corresponding side surface of the wheel hub, that is to say to design the press mold for the wheel hub of the impeller in such a way that no reworking of the bypass forming part is carried out Deepening are more necessary.
- the slot-like depression forming the bypass is subsequently machined into the corresponding side surface by machining processes, such as milling the wheel hub of the impeller.
- machining processes such as milling the wheel hub of the impeller.
- it is also advantageous when dimensioning the bypass if it is at least twice as long as that Width of the material web forming the local barrier is formed in the pressure medium feed groove, the width and depth of which have approximately the same width and depth as the pressure medium supply groove in the side wall of the drive wheel.
- the hydraulic pressure medium When pressure is applied to those pressure chambers of the device, one of which is also connected to the pressure medium supply groove for receiving the locking element, such as when the internal combustion engine is restarted, the hydraulic pressure medium thus initially reaches the local lock in the pressure medium supply groove and then flows within the bypass in the wheel hub of the impeller over the local lock into the receptacle of the locking element and then shifts the locking element into its unlocked position within the axial bore in the wheel hub of the impeller.
- the now unlocked impeller then pivots out of its base position due to the further pressurization of the pressure chambers, so that the bypass in its wheel hub also moves away from its bridging position to the local lock in the pressure medium supply groove and a further pressure medium supply for receiving the locking element by the is now interrupted at the local lock flat side surface of the wheel hub of the impeller.
- the device designed according to the invention for changing the control times of gas exchange valves of an internal combustion engine in particular a rotary piston adjusting device for adjusting the angle of rotation of a camshaft relative to a crankshaft, thus has the advantage over the devices known from the prior art that the locking element ent for the mechanical coupling of the impeller to the drive wheel outside the base position of the impeller by the arrangement of a simple local lock in the pressure medium feed groove for its reception in the side wall of the drive wheel is no longer in pressure medium connection with the corresponding pressure-loaded pressure chamber of the device.
- FIG. 1 shows a cross section through a device designed according to the invention for changing the control times of gas exchange valves of an internal combustion engine
- FIG. 2 shows the section A-A according to FIG. 1 through the device designed according to the invention with the impeller pivoted in the base position;
- FIG. 3 is an enlarged view of section DD of Figure 2;
- FIG. 4 shows the section AA according to FIG. 1 through the device designed according to the invention with the impeller pivoted out of the base position by approximately 5 °;
- Figure 5 is an enlarged view of section E-E of Figure 4.
- FIG. 6 shows a plan view of the inner surface of the side wall of the drive wheel facing away from the camshaft of the device designed according to the invention
- FIG. 7 shows a plan view of the side surface of the wheel hub of the impeller facing away from the camshaft of the device designed according to the invention.
- FIG. 1 clearly shows a device 1 for changing the timing of gas exchange valves of an internal combustion engine, which is designed as a rotary piston adjusting device for adjusting the angle of rotation of a camshaft, not shown, in relation to a crankshaft of an internal combustion engine, also not shown.
- This device 1 is fastened to the drive-side end of the camshaft mounted in the cylinder head of the internal combustion engine, which is also not shown, and is in principle designed as a hydraulic actuator which is controlled as a function of various operating parameters of the internal combustion engine by the hydraulic valve designated by 22 in FIG.
- the device 1 essentially consists of a drive wheel 2 which is in drive connection with the crankshaft and an impeller 3 which is connected in a rotationally fixed manner to the camshaft, the impeller 3 being pivotable in the drive wheel 2 is stored and is in power transmission connection with this.
- the drive wheel 2 has a cavity formed by a hollow cylindrical peripheral wall 4 and two side walls 5, 6, in which five evenly circumferentially distributed hydraulic working spaces 9 are formed by five radial boundary walls 7 and 8 directed towards the longitudinal center axis of the device 1.
- the impeller 3 accordingly has on the circumference of its wheel hub 10 five evenly circumferentially distributed vanes 11, each extending into a working space 9 of the drive wheel 2, which subdivide the working spaces 9 into an A-pressure chamber 12 and a B-pressure chamber 13, which optionally or simultaneous pressurization with a hydraulic pressure medium cause a pivoting movement or fixation of the impeller 3 relative to the drive wheel 2 and thus a rotation angle adjustment or a hydraulic clamping of the camshaft relative to the crankshaft.
- the device 1 for avoiding a rattling of the impeller 3 resulting from the alternating torques of the camshaft has a separate locking element 14 with which the impeller 3 in a pressure drop when the pressure falls below a pressure required for adjustment preferred base position within its adjustment range with the drive wheel 2 can be mechanically coupled.
- This locking element 14 which is designed as a sleeve-like cylindrical pin, is arranged in a through axial bore 15 in the wheel hub 10 of the impeller 3 and by a spring element 16 designed as a compression coil spring, which is located on the one hand on the rear side of the locking element 14 and on the other hand on a counter-holder also inserted into the axial bore 15 17 supports, in a locking position indicated in Figure 1 within a receptacle 19 in the side facing away from the camshaft 5 of the drive wheel 2 displaceable.
- the receptacle 19 is, as can be seen in FIGS.
- the device 1 additionally has a clearly shown in FIG. 6 within the pressure medium supply groove 18 incorporated into the inner surface of the side wall 5 of the drive wheel 2 local lock 20 is arranged, the receptacle 19 of the locking element 14 and its pressure medium supply groove 18 being produced by stamping into the inner surface of the side wall and the local lock 20 being designed as a web of material remaining during stamping.
- FIG. 5 clearly shows that the local lock 20 within the pressure medium supply groove 18 with the impeller 3 pivoted out of the basic position permanently interrupts the pressure medium supply for receiving 19 the locking element 14 and the pressure medium pressure therefore has no negative effects on the locking element 14 can exercise.
- FIG. 7 Bypass 21 shown is arranged, with which a bridging of the local lock 20 and thus a pressure medium supply for receiving 19 of the locking element 14 is possible only when the impeller 3 is pivoted into the base position.
- This bypass 21 for the local lock 20 is clearly shown in FIG.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10355502A DE10355502A1 (en) | 2003-11-27 | 2003-11-27 | System for controlling timing of IC engine especially radial piston type engine has a camshaft mounted wheel with hydraulic ducts inside an outer drive wheel connected to the crankshaft |
PCT/EP2004/011850 WO2005061860A1 (en) | 2003-11-27 | 2004-10-20 | Device from changing the control times of gas exchange valves in an internal combustion engine in particular a rotating piston adjustment device for angular adjustment of a camshaft relative to a crankshaft |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1706604A1 true EP1706604A1 (en) | 2006-10-04 |
EP1706604B1 EP1706604B1 (en) | 2008-01-16 |
Family
ID=34609352
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04765996A Active EP1706604B1 (en) | 2003-11-27 | 2004-10-20 | Device from changing the control times of gas exchange valves in an internal combustion engine in particular a rotating piston adjustment device for angular adjustment of a camshaft relative to a crankshaft |
Country Status (6)
Country | Link |
---|---|
US (1) | US7290513B2 (en) |
EP (1) | EP1706604B1 (en) |
JP (1) | JP2007512459A (en) |
KR (1) | KR101108374B1 (en) |
DE (2) | DE10355502A1 (en) |
WO (1) | WO2005061860A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004027950A1 (en) * | 2004-06-08 | 2006-02-16 | Ina-Schaeffler Kg | Vane-type camshaft adjuster |
DE102005048732A1 (en) | 2005-10-12 | 2007-04-19 | Schaeffler Kg | Hydraulic directional valve |
JP5382427B2 (en) * | 2008-09-04 | 2014-01-08 | アイシン精機株式会社 | Valve timing control device |
DE102009038415A1 (en) | 2009-08-21 | 2011-02-24 | Schaeffler Technologies Gmbh & Co. Kg | Hydraulic control valve e.g. proportional control valve, for controlling hydraulic camshaft adjuster in internal combustion engine, has transmission element pivotably supported at side surfaces of control pistons and control elements |
DE102010013928A1 (en) | 2010-04-06 | 2011-10-06 | Schaeffler Technologies Gmbh & Co. Kg | Rotor assembly for cam shaft adjuster of cam shaft adjustable system, has short axial channel connected with oil distribution chamber between inner circumference of hub part and central screw, where channel is connected with one of channels |
JP5722743B2 (en) * | 2011-10-14 | 2015-05-27 | 日立オートモティブシステムズ株式会社 | Valve timing control device for internal combustion engine |
KR20170029403A (en) * | 2013-09-25 | 2017-03-15 | 아니선 에코테크 피 리미티드 | Self cooled engine |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3342292B2 (en) * | 1995-10-31 | 2002-11-05 | 三洋電機株式会社 | Semiconductor device |
US5989444A (en) * | 1998-02-13 | 1999-11-23 | Zywno; Marek | Fluid bearings and vacuum chucks and methods for producing same |
JP2000179310A (en) * | 1998-12-11 | 2000-06-27 | Toyota Motor Corp | Valve timing control device for internal combustion engine |
JP2001317314A (en) * | 2000-02-28 | 2001-11-16 | Aisin Seiki Co Ltd | Timing control device for opening and closing valve |
JP2001355462A (en) * | 2000-06-09 | 2001-12-26 | Denso Corp | Variable valve timing control device for internal combustion engine |
DE10101328A1 (en) * | 2000-06-16 | 2001-12-20 | Porsche Ag | Device for the relative rotation angle adjustment of a camshaft of an internal combustion engine to a drive wheel |
JP4257477B2 (en) * | 2000-06-23 | 2009-04-22 | 株式会社デンソー | Valve timing adjustment device |
JP2002195015A (en) * | 2000-12-25 | 2002-07-10 | Mitsubishi Electric Corp | Valve timing adjusting device |
US6460496B2 (en) * | 2000-12-25 | 2002-10-08 | Mitsubishi Denki Kabushiki Kaisha | Valve timing control device |
DE10150856B4 (en) | 2001-10-15 | 2005-08-11 | Ina-Schaeffler Kg | Device for changing the timing of gas exchange valves of an internal combustion engine, in particular rotary piston adjusting device for adjusting the rotational angle of a camshaft relative to a crankshaft |
DE10246838A1 (en) | 2002-10-08 | 2004-04-29 | Daimlerchrysler Ag | Locking device for a camshaft adjuster |
DE10253883B4 (en) * | 2002-11-11 | 2006-09-21 | Hydraulik-Ring Gmbh | Adjustment device for camshafts, in particular of motor vehicles |
-
2003
- 2003-11-27 DE DE10355502A patent/DE10355502A1/en not_active Withdrawn
-
2004
- 2004-10-20 DE DE502004005999T patent/DE502004005999D1/en active Active
- 2004-10-20 KR KR1020067010278A patent/KR101108374B1/en active IP Right Grant
- 2004-10-20 JP JP2006540208A patent/JP2007512459A/en active Pending
- 2004-10-20 US US10/575,143 patent/US7290513B2/en active Active
- 2004-10-20 EP EP04765996A patent/EP1706604B1/en active Active
- 2004-10-20 WO PCT/EP2004/011850 patent/WO2005061860A1/en active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO2005061860A1 * |
Also Published As
Publication number | Publication date |
---|---|
US7290513B2 (en) | 2007-11-06 |
DE10355502A1 (en) | 2005-06-23 |
KR20060107794A (en) | 2006-10-16 |
JP2007512459A (en) | 2007-05-17 |
KR101108374B1 (en) | 2012-01-30 |
WO2005061860A1 (en) | 2005-07-07 |
US20070039580A1 (en) | 2007-02-22 |
DE502004005999D1 (en) | 2008-03-06 |
EP1706604B1 (en) | 2008-01-16 |
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