CN102165148A - Electrohydraulic valve controller - Google Patents
Electrohydraulic valve controller Download PDFInfo
- Publication number
- CN102165148A CN102165148A CN2009801378683A CN200980137868A CN102165148A CN 102165148 A CN102165148 A CN 102165148A CN 2009801378683 A CN2009801378683 A CN 2009801378683A CN 200980137868 A CN200980137868 A CN 200980137868A CN 102165148 A CN102165148 A CN 102165148A
- Authority
- CN
- China
- Prior art keywords
- hydrovalve
- control apparatus
- valve control
- hydraulic
- release chamber
- 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 claims abstract description 14
- 230000002000 scavenging effect Effects 0.000 claims description 16
- 208000006011 Stroke Diseases 0.000 description 7
- 238000010586 diagram Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
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
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
- F01L9/11—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column
- F01L9/12—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column with a liquid chamber between a piston actuated by a cam and a piston acting on a valve stem
- F01L9/14—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column with a liquid chamber between a piston actuated by a cam and a piston acting on a valve stem the volume of the chamber being variable, e.g. for varying the lift or the timing of a valve
-
- 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
- F01L2001/34423—Details relating to the hydraulic feeding circuit
- F01L2001/34446—Fluid accumulators for the feeding circuit
-
- 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
- F01L2800/00—Methods of operation using a variable valve timing mechanism
- F01L2800/12—Fail safe operation
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
The invention relates to an electrohydraulic valve controller (1) for the variable actuation of a gas exchange valve (2) of an internal combustion engine, comprising a hydraulic valve (13), and for the purpose of emergency running properties, a further hydraulic valve (19).
Description
Technical field
The present invention relates to a kind of electro-hydraulic valve control apparatus of operating internal-combustion engines scavenging air valve changeably that is used for.This valve control apparatus comprises:
● by the active piston of camshaft actuated,
● drive the relay piston of scavenging air valve,
● the pressure chamber that defines by active piston and relay piston, have the volume that can change,
● be connected the release chamber on the hydraulic medium supplier of internal-combustion engine,
● the pilot line that the pressure chamber is connected with the release chamber and be arranged in this pilot line can be automatically controlled hydrovalve, this hydrovalve discharges or the hydraulic medium stream of blocking-up by described pilot line,
● with pressure chamber bypass line that is connected with the release chamber and the safety check that is arranged in this bypass line, this safety check discharges by described bypass line and flows to the hydraulic medium in the pressure chamber, and blocking-up is flowed to the hydraulic medium in the release chamber by described bypass line.
Background technique
EP 0 931 912 A2 that such valve control apparatus forms by being considered as classifying and learning.The control time of scavenging air valve and the variability of range are obtained by following mode, promptly, the partial volume that act as the pressure chamber of so-called hydraulic connecting rod can infinitely be adjusted in the release chamber when hydrovalve is opened, and therewith correspondingly, the cam stroke of being scheduled to by camshaft is not fully, either partially or fully be delivered on the scavenging air valve.Therefore, the prime responsibility of the functional reliability of valve control apparatus is born by hydrovalve, and the switching function of hydrovalve must guarantee under all operating conditionss of internal-combustion engine accurately and can reproduce.
Yet, because the no longer closed shut-down that can be accompanied by one or more affiliated scavenging air valve of hydrovalve, and the fault that can not get rid of hydrovalve forever fully, so the valve control apparatus that is proposed in the document of quoting lacks the emergency operating performance that can make internal-combustion engine continue operation at least limitedly.
Summary of the invention
The invention task
Therefore, task of the present invention promptly, is improved the valve control apparatus of the described type of beginning as follows based on following aspect, that is, make this valve control apparatus also have enough emergency operating performances under the situation of hydrovalve fault.Can be understood as at this: when emergency operating, can produce equally the enough valve strokes of the successful ventilation of internal-combustion engine.
Summary of the invention
The solution of this task is obtained by the described feature of claim 1, and favourable improvement project of the present invention and design proposal can be learnt by dependent claims.Therefore, valve control apparatus should comprise other hydrovalve, described other hydrovalve is arranged in pilot line between hydrovalve and the release chamber, and this other hydrovalve is blocked when the hydrovalve mistake is opened by the hydraulic medium stream of pilot line in the release chamber.By this measure, when hydrovalve is in (for example because the mechanical failure on current interruptions or the hydrovalve) when opening lastingly, in the pressure chamber, can be formed for equally stroke is delivered to enough pressure on the scavenging air valve, method is: described other hydrovalve is closed during emergency operating, and and then stops the release of pressure chamber.
For situation useful in meaning of the present invention, that is, the mode that hydrovalve is opened with no current is constructed, and can do following setting, that is, other hydrovalve is equally can mode automatically controlled and that no current is opened constructing.The major advantage of this design is the suitable energy balance of valve control apparatus, because so described other hydrovalve can only be switched on during emergency operating.Yet, however, there is following feasible program equally, that is, it is closed and/or replace electronic control to this other hydrovalve that other hydrovalve is embodied as no current, can select hydraulic pressure, pneumatic or mechanical control.
In addition, hydrovalve should be configured to compare with described other hydrovalve obviously and open and close quickly.Because can abandon the normal function of valve control apparatus during the limited in time emergency operating,, and therefore can be configured to relatively slowly that open and close and valve with low cost so described other hydrovalve can keep lasting closure.
Description of drawings
Other features of the present invention are by following explanation and therein the picture of the embodiment of the invention is shown simplifiedly and obtains.The hydraulic pressure that unique accompanying drawing shows according to electric hydaulic valve control apparatus of the present invention opens and closes schematic diagram.
Embodiment
Disclose by hydraulic pressure switching schematic diagram in the accompanying drawings and be used for the chief component of the foundation electric hydaulic valve control apparatus 1 of the present invention of operating internal-combustion engines scavenging air valve 2 changeably.Shown is active piston 3 and relay piston 7, this active piston 3 drives by the cam 5 of Lever type cam pack 4 by camshaft 6, this relay piston 7 drives a pair of scavenging air valve that works comparably 2 by valve bridge 8 against the power of the valve spring 9 that works to closing direction, that is to say intake valve or exhaust valve.Active piston 3 and relay piston 7 define the pressure chamber 10 of hydraulic pressure, and this pressure chamber 10 is connected with the release chamber 12 of hydraulic pressure by pilot line 11.The hydrovalve 13 that is arranged in the pilot line 11, constructs with the structure of mode that can be automatically controlled and no current opening type according to the switching symbol of being drawn is responsible for: discharge or the hydraulic medium stream of pilot line 11 is passed in blocking-up, and therewith correspondingly, pressure chamber 10 has the volume that can change during operation active piston 3.The amplitude of the stepless variable of consequent valve operation is within the following boundary: boundary is that when being in closed position during the whole stroke stage of hydrovalve 13 at active piston 3, the maximum of scavenging air valve 2 is opened stroke on the one hand; Boundary is on the other hand, the most mostly is in when opening attitude when hydrovalve 13 is promoted to up to active piston 3 at least, and scavenging air valve 2 cuts off fully.
Be connected by safety check 15 on the hydraulic medium supplier 14 of internal-combustion engine, and be connected the spring-loaded accumulator 16 that the release chamber 12 on the feeding lubricating device of internal-combustion engine has known configurations at present, and the purpose for compensating the pressure chamber's 10 hydraulic medium losses that caused by leakage is connected with pressure chamber 10 by bypass line 17.At this, the effect that is arranged in the safety check 18 in the bypass line 17 is, discharge to pass the hydraulic medium stream of bypass line 17 in the pressure chamber 10, and the hydraulic medium stream of bypass line 17 in the release chamber 12 passed in blocking-up.
At following situation, promptly, hydrovalve 13 keeps opening mistakenly (as above-mentioned during internal combustion engine operation, particularly the interruption of power supply of hydrovalve 13 is thought of as reason to this) and this can cause scavenging air valve 2 to be stopped work fully, correspondingly, the internal combustion engine operation performance is unacceptable, valve control apparatus 1 comprises other hydrovalve 19 according to the present invention ground, this other hydrovalve 19 is arranged in pilot line 11 between hydrovalve 13 and the release chamber 12, and, open during that is to say valve control apparatus 1 failure-free operation normally.Yet described other hydrovalve 19 makes the emergency operating of internal-combustion engine become possibility.This emergency operating is introduced thus, promptly, to be in hydrovalve 13 backs that mistake opens closed detecting for described other hydrovalve 19, thereby make that the hydraulic medium pressure of formation no longer can be unloaded in the release chamber 12 pressure chamber 10 in, and make scavenging air valve 2 apertures sufficiently open.Then under pressure chamber's 10 complete incompressible and leak free theoretical case, be delivered on the scavenging air valve 2 fully and be coincident with above-mentioned maximum by active piston 3 predetermined strokes and open stroke.
To open and close symbol according to it is that the requirement of the transfer speed of the other hydrovalve of opening with no current 19 that can be automatically controlled can be set to be starkly lower than the requirement to hydrovalve 13 equally.Its reason is that other hydrovalve 19 only needs to be transformed into closed position from opening attitude once when emergency operating begins.Therewith correspondingly, compare with the hydrovalve 13 of obviously faster switching, described other hydrovalve 19 can be implemented basically more inexpensively.
Reference numeral
1 valve control apparatus
2 scavenging air valves
3 active pistons
4 cam packs
5 cams
6 camshafts
7 relay pistons
8 valve bridges
9 valve springs
10 pressure chambers
11 pilot line
13 hydrovalves
14 hydraulic medium supplieies
15 safety check
16 accumulators
17 bypass lines
18 safety check
19 other hydrovalves
Claims (4)
1. be used for the electro-hydraulic valve control apparatus (1) of the scavenging air valve of operating internal-combustion engines (2) changeably, comprise
● by the active piston (3) of camshaft (6) driving,
● drive the relay piston (7) of scavenging air valve (2),
● by described active piston (3) and described relay piston (7) pressure chamber (10) that define, that have the volume that can change,
● be connected the release chamber (12) on the hydraulic medium supplier (14) of described internal-combustion engine,
● the pilot line (11) that described pressure chamber (10) are connected with described release chamber (12) and be arranged in the automatically controlled hydrovalve (13) of energy in the described pilot line (11), described hydrovalve discharges or blocks the hydraulic medium that passes through described pilot line (11) and flow
● the bypass line (17) that described pressure chamber (10) are connected with described release chamber (12) and be arranged in safety check (18) in the described bypass line (17), described safety check discharges by described bypass line (17) and flows to the hydraulic medium in the pressure chamber (10), and blocking-up is flowed to the hydraulic medium in the described release chamber (12) by described bypass line (17)
● it is characterized in that, described valve control apparatus (1) comprises other hydrovalve (19), described other hydrovalve is arranged in described pilot line (11) between described hydrovalve (13) and the described release chamber (12), and described other hydrovalve is blocked when mistake is opened by the hydraulic medium stream of described pilot line (11) in the described release chamber (12) at described hydrovalve (13).
2. by the described electro-hydraulic valve control apparatus of claim 1 (1), it is characterized in that the mode that described hydrovalve (13) is opened with no current is constructed.
3. by the described electro-hydraulic valve control apparatus of claim 2 (1), it is characterized in that described other hydrovalve (19) is equally mode automatically controlled and that no current is opened constructing.
4. by the described electro-hydraulic valve control apparatus of claim 1 (1), it is characterized in that described hydrovalve (13) is constructed to such an extent that compare with described other hydrovalve (19) obviously and open and close quickly.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008049181A DE102008049181A1 (en) | 2008-09-26 | 2008-09-26 | Electrohydraulic valve control |
| DE102008049181.0 | 2008-09-26 | ||
| PCT/EP2009/061895 WO2010034643A1 (en) | 2008-09-26 | 2009-09-15 | Electrohydraulic valve controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102165148A true CN102165148A (en) | 2011-08-24 |
| CN102165148B CN102165148B (en) | 2013-07-17 |
Family
ID=41353850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009801378683A Expired - Fee Related CN102165148B (en) | 2008-09-26 | 2009-09-15 | Electrohydraulic valve controller |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20110277712A1 (en) |
| EP (1) | EP2329116B1 (en) |
| KR (1) | KR101581068B1 (en) |
| CN (1) | CN102165148B (en) |
| DE (1) | DE102008049181A1 (en) |
| WO (1) | WO2010034643A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106661973A (en) * | 2014-04-29 | 2017-05-10 | 福特汽车萨纳伊股份有限公司 | Valve timing system |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010022346A1 (en) | 2010-06-01 | 2011-12-01 | Schaeffler Technologies Gmbh & Co. Kg | Electrohydraulic valve control |
| US8701607B2 (en) * | 2011-08-25 | 2014-04-22 | Chrysler Group Llc | System and method for engine valve lift strategy |
| DE102012221354A1 (en) | 2012-11-22 | 2013-01-24 | Schaeffler Technologies AG & Co. KG | Hydraulic unit for cylinder head of internal combustion engine with hydraulically variable gas exchange valve train, has hydraulic connection, which is provided between high pressure chamber and medium-pressure chamber |
| DE102013100632A1 (en) * | 2013-01-22 | 2014-07-24 | Lsp Innovative Automotive Systems Gmbh | Variable electrohydraulic valve control |
| DE102015216866A1 (en) | 2015-09-03 | 2017-03-09 | Schaeffler Technologies AG & Co. KG | Electrohydraulic valve control with variable valve lift and heat engine |
| DE102016218918B4 (en) * | 2016-09-29 | 2018-09-13 | Schaeffler Technologies AG & Co. KG | Internal combustion engine with hydraulically variable gas exchange valve drive |
| US10233795B2 (en) * | 2017-02-15 | 2019-03-19 | Schaeffler Technologies AG & Co. KG | Bypass valve for pressure oscillation control |
| DE102017005069A1 (en) | 2017-05-22 | 2018-11-22 | Bernd Niethammer | Device for adjusting the stroke of a valve of internal combustion engines |
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| JPH094424A (en) * | 1995-06-19 | 1997-01-07 | Nissan Motor Co Ltd | Variable valve gear for internal combustion engine |
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| US20030213442A1 (en) * | 2002-05-14 | 2003-11-20 | Cornell Sean O. | Engine valve actuation system |
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2008
- 2008-09-26 DE DE102008049181A patent/DE102008049181A1/en not_active Withdrawn
-
2009
- 2009-09-15 CN CN2009801378683A patent/CN102165148B/en not_active Expired - Fee Related
- 2009-09-15 KR KR1020117006852A patent/KR101581068B1/en active IP Right Grant
- 2009-09-15 US US13/121,257 patent/US20110277712A1/en not_active Abandoned
- 2009-09-15 WO PCT/EP2009/061895 patent/WO2010034643A1/en active Application Filing
- 2009-09-15 EP EP09782988.1A patent/EP2329116B1/en not_active Not-in-force
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| JPH094424A (en) * | 1995-06-19 | 1997-01-07 | Nissan Motor Co Ltd | Variable valve gear for internal combustion engine |
| KR20010031821A (en) * | 1997-11-04 | 2001-04-16 | 디이젤 엔진 리타더스, 인코포레이티드 | Lost motion valve actuation system |
| EP0931912A2 (en) * | 1998-01-23 | 1999-07-28 | C.R.F. Società Consortile per Azioni | Internal combustion engine with variable hydraulic valve actuating system |
| DE10048263A1 (en) * | 2000-01-14 | 2001-07-19 | Continental Teves Ag & Co Ohg | Method for operating an internal combustion engine |
| US20030213442A1 (en) * | 2002-05-14 | 2003-11-20 | Cornell Sean O. | Engine valve actuation system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106661973A (en) * | 2014-04-29 | 2017-05-10 | 福特汽车萨纳伊股份有限公司 | Valve timing system |
| CN106661973B (en) * | 2014-04-29 | 2019-04-12 | 福特汽车萨纳伊股份有限公司 | Valve timing system |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102008049181A1 (en) | 2010-04-01 |
| KR101581068B1 (en) | 2015-12-29 |
| US20110277712A1 (en) | 2011-11-17 |
| KR20110059627A (en) | 2011-06-02 |
| EP2329116B1 (en) | 2014-12-17 |
| WO2010034643A1 (en) | 2010-04-01 |
| CN102165148B (en) | 2013-07-17 |
| EP2329116A1 (en) | 2011-06-08 |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
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