EP2877717A1 - Verfahren zum betrieb einer brennkraftmaschine mit elektrohydraulischer ventilsteuerung - Google Patents
Verfahren zum betrieb einer brennkraftmaschine mit elektrohydraulischer ventilsteuerungInfo
- Publication number
- EP2877717A1 EP2877717A1 EP13758723.4A EP13758723A EP2877717A1 EP 2877717 A1 EP2877717 A1 EP 2877717A1 EP 13758723 A EP13758723 A EP 13758723A EP 2877717 A1 EP2877717 A1 EP 2877717A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- hydraulic
- internal combustion
- combustion engine
- gas exchange
- 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
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
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
- F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
-
- 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
-
- 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
Definitions
- the invention relates to a method according to the preamble of claim 1.
- WO 201 1/069836 A1 discloses a generic method for operating an internal combustion engine.
- a gas exchange valve lift required for the charge cycle is to be regulated within a minimum lift height and a maximum closing time.
- a hydraulic valve is switched so that only a partial volume is filled in a pressure chamber with pressure medium and thus the gas exchange valve is only partially actuated.
- the object of the invention is the advantageous development of the generic method for improving the starting behavior and in particular the cold start behavior of an internal combustion engine.
- the proposed method is provided for operating an internal combustion engine with an electro-hydraulic valve control for the variable-stroke drive of a spring-loaded in the closing direction gas exchange valve.
- the electro-hydraulic valve control includes a camshaft and arranged in the drive sense between the camshaft and the gas exchange valve Hydraulic icsystem.
- the hydraulic system is connected to a pressure medium supply of the internal combustion engine. From a cam of the camshaft, a first hydraulic piston is driven.
- the gas exchange valve is driven in the opening direction by a second hydraulic piston. Between the hydraulic piston, a pressure chamber is provided.
- a control channel connects the pressure chamber to a pressure relief chamber.
- an electrically controlled hydraulic valve is arranged, which allows a pressure medium flow through the control channel in the open position of the hydraulic valve and locks in the closed position.
- the hydraulic valve is controlled by an electronic control means as a function of operating parameters of the internal combustion engine.
- the hydraulic valve is closed and reopened at least once between two immediately successive strokes of the first hydraulic piston.
- the closed during a stroke of the first hydraulic piston hydraulic valve can be opened again before a maximum lift of the gas exchange valve.
- the refilling of the pressure chamber is improved with pressure medium.
- the hydraulic system is heated by converting electrical energy of the electrically controlled hydraulic valve into heat and supplying it to the valve piston, the valve seat of the hydraulic valve and the pressure medium.
- FIG. 2 shows a sequence of the behavior of the valve drive over a crankshaft angle shown in detail in a start-up manner
- Figure 3 is a sequence similar to the sequence of Figure 2 in a later
- FIG. 1 shows a basic illustration of a known electrohydraulic valve control system 1.
- the valve control 1 is used for variable-stroke drive of a force-loaded in the closing direction by a valve spring 2 gas exchange valve 3 of an internal combustion engine 4.
- the cam 5 On the camshaft 6, the cam 5 is arranged, which drives the first hydraulic piston 8 by means of the bucket tappet 7.
- the second hydraulic piston 9 drives the gas exchange valve 3 in the form of an inlet or outlet valve in its opening direction.
- the pressure relief chamber 1 1 is connected by means of the control channel 12 to the pressure chamber 10 and contains the spring-loaded accumulator 13.
- the arranged in the drive sense between the camshaft 6 and the Gaswech- selventil 3 hydraulic system is connected to the pressure medium supply 14 of the internal combustion engine 4 and here at the lubricant circuit ,
- the electrically controlled hydraulic valve 15 is arranged in the design of a 2/2-way switching valve.
- the hydraulic valve 15 is open in the non-energized state and allows a pressure medium flow through the control channel 12 to. In the energized state, the hydraulic valve 15 locks the control channel 12.
- the electrical control of the hydraulic valve 15 takes place in Dependent on Betnebsparametern the internal combustion engine 4 by means of the electronic drive means 16.
- the drive means 16 may be integrated in the engine control unit.
- the known operation of the valve control 1 can be summarized to the effect that the pressure medium located in the pressure chamber 10 acts as a hydraulic linkage.
- the predetermined by the cam 5 stroke of the first hydraulic piston 8 is transmitted with closed hydraulic valve 15 by means of the second hydraulic piston 9 to the gas exchange valve 3.
- FIGS. 2 and 3 show the sequences 20, 21 shown in FIGS. 2 and 3 in detail above the crankshaft angle ⁇ . These each show the course 22 of the stroke of the first hydraulic piston 8 and the courses 23, 24 of the stroke of the gas exchange valve 3 and the courses of the energizations 28, 29, 30 of the hydraulic valve 15 during a starting phase of the internal combustion engine 4.
- FIG. 2 shows the sequence 20, which is applied during the first crankshaft revolutions during cold start of the internal combustion engine 4.
- the hydraulic valve 15 is closed by means of the current supply 28 between two immediately successive Hubverêtn 22, 23 and is subsequently in the angular range .DELTA. ⁇ -, reopened.
- the hydraulic valve 15 is closed by means of the current 29.
- the energization is switched off and the hydraulic valve 15 is opened again, so that the gas exchange valve 3 remains open only over a shortened angle range.
- pressure changes in the pressure chamber 10 this is at least partially emptied and in the angular range ⁇ 2 , in the base circle of the cam 5 to the renewed Current supply 28 of the hydraulic valve 15 extends, filled with still open hydraulic valve 15 due to the pressure changes occurring again.
- FIG. 3 shows the sequence 21 which, as an alternative to the sequence 20 or after the execution of a predetermined number of sequences 20 of FIG. 2, is carried out over a predetermined number of camshaft revolutions.
- the sequence 21 has a prolonged energization 30 during the entire stroke of the first hydraulic piston 8.
- the gas exchange valve 3 remains open longer and it is consistently each of two energys 28, 30 limited angle ranges ⁇ - ⁇ for refilling the pressure chamber 10 a.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012212989.8A DE102012212989A1 (de) | 2012-07-24 | 2012-07-24 | Verfahren zum Betrieb einer Brennkraftmaschine mit elektrohydraulischer Ventilsteuerung |
| PCT/DE2013/200072 WO2014015869A1 (de) | 2012-07-24 | 2013-07-24 | Verfahren zum betrieb einer brennkraftmaschine mit elektrohydraulischer ventilsteuerung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2877717A1 true EP2877717A1 (de) | 2015-06-03 |
| EP2877717B1 EP2877717B1 (de) | 2016-06-08 |
Family
ID=49117605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13758723.4A Active EP2877717B1 (de) | 2012-07-24 | 2013-07-24 | Verfahren zum betrieb einer brennkraftmaschine mit elektrohydraulischer ventilsteuerung |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US9435231B2 (de) |
| EP (1) | EP2877717B1 (de) |
| CN (1) | CN104619960B (de) |
| DE (1) | DE102012212989A1 (de) |
| WO (1) | WO2014015869A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9464590B2 (en) | 2014-04-16 | 2016-10-11 | Fca Us Llc | Variable stroke direct injection fuel pump system |
| CN109653829B (zh) * | 2018-12-26 | 2020-10-23 | 王自勤 | 一种气门滞后角的电液调控方法及装置 |
| EP3715594B1 (de) * | 2019-03-29 | 2021-10-27 | ABB Schweiz AG | Ventiltrieb mit hydraulischem verzögerungselement für einen verbrennungsmotor |
| US11566545B2 (en) | 2019-05-02 | 2023-01-31 | Caterpillar Inc. | Cam actuated gas admission valve with electro-hydraulic trim control |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4664070A (en) | 1985-12-18 | 1987-05-12 | The Jacobs Manufacturing Company | Hydro-mechanical overhead for internal combustion engine |
| US5537976A (en) | 1995-08-08 | 1996-07-23 | Diesel Engine Retarders, Inc. | Four-cycle internal combustion engines with two-cycle compression release braking |
| ITTO20020149A1 (it) | 2002-02-21 | 2003-08-21 | C R F Societa Con Sortile Per | Motore pluricilindrico a combustione interna con dispositivo idraulico a controllo elettronico per l'azionamento variabile delle valvole, in |
| ITTO20020234A1 (it) * | 2002-03-15 | 2003-09-15 | Fiat Ricerche | Motore pluricilindrico a combustione interna con dispositivo idraulico a controllo elettronico per l'azionamento variabile delle valvole e d |
| ITTO20020568A1 (it) | 2002-07-01 | 2004-01-02 | Fiat Ricerche | Motore a combustione interna con sistema idraulico a controllo elettronico per l'azionamento delle valvole e mezzi per compensare i cambiame |
| ITTO20020571A1 (it) | 2002-07-01 | 2004-01-02 | Fiat Ricerche | Motore a combustione interna con due valvole di aspirazione per ciascun cilindro e sistema a controllo elettronico per azionare le due valvo |
| DE602004004997T2 (de) | 2004-01-16 | 2007-11-08 | C.R.F. S.C.P.A. | Brennkraftmaschine mit einer einzigen obenliegenden Nockenwelle zur mechanischen Steuerung der Auslassventile und zur elektrohydraulischen Steuerung der Einlassventile |
| CN201100150Y (zh) * | 2007-09-08 | 2008-08-13 | 冯子光 | 一种发动机的气门驱动配气装置 |
| CN101509404B (zh) * | 2008-02-15 | 2011-05-18 | 蔡学功 | 可变气门系统 |
| ATE520866T1 (de) * | 2008-11-07 | 2011-09-15 | Fiat Ricerche | Dieselmotor mit nocken zum betätigen von einlassventilen, welche einen hauptnocken und einen hilfsnocken, die miteinander verbunden sind,aufweisen |
| EP2204566B1 (de) | 2008-12-29 | 2011-06-29 | Fiat Group Automobiles S.p.A. | Adaptives Steuersystem des Luft-Kraftstoff-Verhältnisses einer Brennkraftmaschine mit einem variablen Ventilsteuerungssystem |
| ATE534806T1 (de) * | 2009-06-30 | 2011-12-15 | Fiat Ricerche | Hydraulisches system unter elektronischer kontrolle zur variablen betätigung der ventile einer brennkraftmaschine, mit schneller befüllung der hochdrukteils des systems |
| EP2510201B1 (de) | 2009-12-08 | 2015-01-07 | Schaeffler Technologies GmbH & Co. KG | Brennkraftmaschine mit elektrohydraulischer ventilsteuerung und verfahren zum betrieb der brennkraftmaschine |
| DE102011051487B4 (de) * | 2010-11-12 | 2017-01-12 | Hyundai Motor Co. | Elektrohydraulische Ventilsteuerung |
-
2012
- 2012-07-24 DE DE102012212989.8A patent/DE102012212989A1/de not_active Ceased
-
2013
- 2013-07-24 WO PCT/DE2013/200072 patent/WO2014015869A1/de not_active Ceased
- 2013-07-24 US US14/416,422 patent/US9435231B2/en active Active
- 2013-07-24 CN CN201380038669.3A patent/CN104619960B/zh active Active
- 2013-07-24 EP EP13758723.4A patent/EP2877717B1/de active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2014015869A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2877717B1 (de) | 2016-06-08 |
| CN104619960B (zh) | 2017-06-27 |
| DE102012212989A1 (de) | 2014-01-30 |
| CN104619960A (zh) | 2015-05-13 |
| WO2014015869A1 (de) | 2014-01-30 |
| US20150176439A1 (en) | 2015-06-25 |
| US9435231B2 (en) | 2016-09-06 |
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