EP1029156A1 - Procede de commande d'une valve d'echange gazeux de moteurs a combustion interne - Google Patents

Procede de commande d'une valve d'echange gazeux de moteurs a combustion interne

Info

Publication number
EP1029156A1
EP1029156A1 EP99913074A EP99913074A EP1029156A1 EP 1029156 A1 EP1029156 A1 EP 1029156A1 EP 99913074 A EP99913074 A EP 99913074A EP 99913074 A EP99913074 A EP 99913074A EP 1029156 A1 EP1029156 A1 EP 1029156A1
Authority
EP
European Patent Office
Prior art keywords
pressure
internal combustion
valve
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.)
Withdrawn
Application number
EP99913074A
Other languages
German (de)
English (en)
Inventor
Udo Diehl
Karsten Mischker
Rainer Walter
Stefan Franzl
Volker Beuche
Stefan Reimer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1029156A1 publication Critical patent/EP1029156A1/fr
Withdrawn legal-status Critical Current

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
    • 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

Definitions

  • the invention is based on a method for controlling a gas exchange valve for internal combustion engines according to the preamble of claim 1.
  • the gas exchange valve has an axially displaceable valve member which has a valve sealing surface at its end near the combustion chamber, with which it is used to control an inlet or outlet cross section on the combustion chamber of the internal combustion engine with a stationary one Valve seat interacts.
  • the valve member of the gas exchange valve has a working piston which, with its axial end faces, delimits two hydraulic work spaces, of which an upper hydraulic work space remote from the combustion chamber can be alternately filled and relieved of pressure, and which thus counteracts the valve member of the gas exchange valve against one on the underside of the piston attacking constant closing force operated in the opening or closing direction.
  • the constant closing force on the valve member piston is guaranteed by the constant connection of the lower combustion chamber near the combustion chamber with a high-pressure medium source.
  • the known valve control device has the disadvantage that it is operated with a constant pressure medium supply pressure.
  • This supply pressure must be chosen at least so high that the necessary valve actuator dynamics are still reliably achieved both at the highest speed and load of the internal combustion engine and at low temperatures and thus a low viscosity of the hydraulic medium.
  • these operating states on the internal combustion engine to be supplied occur only briefly in real driving operation, so that an unnecessarily high pressure medium supply pressure must be maintained over the longest period of time.
  • this pressure directly affects the power requirement of the overall vehicle system, it also affects the overall efficiency of the internal combustion engine to be supplied.
  • the inventive method for controlling a gas exchange valve for internal combustion engines with the characterizing features of claim 1 has the advantage that the supply pressure of the valve control device is only brought to the maximum required for the extreme boundary conditions if such a high supply pressure due to the current operating parameters supplying internal combustion engine is actually necessary.
  • the supply pressure of the pressure medium provided for actuating the gas exchange valve member is advantageously changed and set as a function of the current operating parameters of the internal combustion engine to be supplied during its operation. In this way it is possible to close the valve control device with a reduced pressure over wide operating cycles of the internal combustion engine to be supplied operate that is sufficient for the normal everyday operation of vehicle internal combustion engines.
  • Supply pressure levels are alternatively possible through two strategies, wherein in a first strategy the valve control system pressure is changed continuously depending on the operating parameters of the internal combustion engine, such as temperature, speed and load. It is particularly advantageous to set the supply pressure level using a map stored in an electrical control unit.
  • a second alternative strategy for the variable control of the supply pressure level is the gradual switching between different pressure levels depending on the temperature, the speed and the load on the internal combustion engine to be supplied.
  • the number of pressure stages is initially variable, but an optimal design must be adapted to the respective internal combustion engine. It is particularly advantageous to provide two pressure levels, a first of which covers the lower to middle operating state of the internal combustion engine and a second of which provides the high pressure level for the demanding operating states. In order to avoid switching back and forth too often between adjacent pressure levels, a hysteresis function is provided in their border areas.
  • a controllable high-pressure pump is advantageously used, which can be driven directly by the internal combustion engine and at a speed synchronous with this, so that the
  • Delivery volume of the pump already increases automatically with the speed of the internal combustion engine.
  • it is also possible to regulate the high-pressure pump on the suction side for example by means of an adjustable suction throttle, or on the pressure side by means of corresponding pressure valves.
  • the valve control device advantageously has a hydraulic actuator in which a piston connected to the gas exchange valve delimits at least one hydraulic working space. This hydraulic one
  • the work space can be filled and relieved alternately with a pressure medium under high pressure, filling and relieving the work space by means of control valves in an inlet or in a relief line depending on operating parameters the internal combustion engine.
  • the actuating force acting on the piston of the hydraulic actuator on the part of the hydraulic working space is opposed by a constant counterforce directed in the closing direction of the gas exchange valve member.
  • This constant clamping force can be provided hydraulically or mechanically.
  • the mechanical provision takes place via springs, while the hydraulic counterforce is built up by the provision of a second hydraulic working space, which acts on the actuating piston of the gas exchange valve element opposite the first hydraulic working space.
  • this second hydraulic working chamber acting in the closing direction is advantageously continuously connected to the high-pressure medium supply line, so that the high pressure of the hydraulic actuating medium is constantly present in this chamber.
  • FIG. 1 shows a device for actuating a gas exchange valve for internal combustion engines, in which the hydraulic actuating piston of the The gas exchange valve member delimits, with its end faces, two opposing hydraulic working spaces, the hydraulic pressure medium being provided by a controllable high-pressure pump.
  • a piston-shaped valve member 3 of the gas exchange valve is guided axially displaceably in a housing 1.
  • the gas exchange valve member 3 has at its lower end facing the combustion chamber a valve plate 5, the upper end face of which forms a valve sealing surface 7. With this valve sealing surface 7, the valve member 3 interacts with a fixed valve seat 9 on the housing 1 and thus controls an inlet or outlet cross section on the combustion chamber of the internal combustion engine to be supplied, which is not shown in detail.
  • the valve member 3 At its upper end remote from the combustion chamber, the valve member 3 has a hydraulic adjusting piston 11 which is enlarged in cross section and which is guided with its cylindrical outer circumferential wall surface in a sealingly slidable manner in a cylinder 13.
  • the piston 11 delimits a lower hydraulic working space 17 with its lower combustion chamber facing ring end face 15 and an upper hydraulic working space 21 with its entire upper piston end face 19.
  • the hydraulic working pressure applied in the lower working chamber 17 acts on the piston 11 via the lower ring end face 15 in the closing direction of the
  • Valve member 3 while the pressure in the upper working chamber 21 acts on the piston 11 via the upper piston end face 19 in the opening direction of the valve member 3.
  • the hydraulic pressure medium actuating the hydraulic valve actuator is provided via a controllable high-pressure pump 23, which draws in the pressure medium, preferably hydraulic or engine oil, from a reservoir 25 and via a
  • Pressure medium supply line 27 to the cylinder 13 promotes.
  • the main branch of the pressure medium supply line 27 opens into the upper hydraulic working chamber 21, a branch line 29 leading away from the pressure medium supply line 27, which in turn opens into the lower hydraulic working chamber 17.
  • an electrical control valve 31 is inserted into the pressure medium supply line 27 downstream of the branching into the branch line 29 and shortly before the confluence with the upper working space 21.
  • a first check valve 33 is inserted in the flow direction before branching into the branch line 29 in the pressure medium supply line 27 to maintain a standing pressure.
  • a relief line 35 also leads from the upper working space 21, which opens into the storage container 25 and into which an electrical control valve 37 is also inserted, via which the relief line 35 can be opened or closed.
  • a second check valve 39 is provided in the relief line 35 downstream of the control valve 37.
  • an electrical control unit 41 which processes various current operating parameters of the internal combustion engine to be supplied, such as the temperature, speed and load, as input variables. Depending on these current input variables, it is then preferred controlled, the controllable high-pressure pump 23 and the electrical control valves 31 and 37 are controlled.
  • the described actuating device for a gas exchange valve for internal combustion engines works in the following manner.
  • the high-pressure pump 23 is also preferably driven at a speed which is synchronous with the internal combustion engine and thus conveys the pressure medium from the reservoir 25 under pressure into the
  • Pressure medium supply line 27 The pressurized pressure medium passes via the branch line 29 into the lower working chamber 17 which is permanently connected to the pressure medium supply line 27. There, the high pressure acts on the piston 11 via the ring face 15 in the closing direction of the
  • Valve member 3 so that it is held with its valve sealing surface 7 in contact with the stationary valve seat 9.
  • the check valve 33 arranged in the pressure medium supply line 27 ensures the maintenance of a certain standing pressure in the branch line 29 and the lower working chamber 17, so that the valve member 3 is held in the closed position even when the internal combustion engine is switched off.
  • the control valve 31 arranged in the pressure medium supply line 27 holds in the starting position, that is to say when the gas exchange valve is closed, the mouth of the
  • valve member opening positions can be variably set and maintained by appropriately actuating the control valves 31 and 37.
  • the opening of the gas exchange valve is ended by the control valves 31 and 37 being activated again via the electrical control device 41 in such a way that the confluence of the pressure medium supply line in the upper working space 21 is closed and the relief line 35 is opened again from the latter.
  • the high pressure in the upper working chamber 21 relaxes in the storage container 25 and the closing force acting in the lower working chamber 17 via the annular end face 15 on the piston 11 of the valve member 3 displaces the valve member 3 again in sealing contact with its valve sealing surface 7 on the valve seat 9.
  • the high pressure pump 23 is controlled so that the Supply pressure of the pressure medium is set as a function of current operating parameters of the internal combustion engine to be supplied during its operation.
  • the high-pressure pump can be operated at engine-synchronous speed, for example throttled on the suction side.
  • the control of the various pressure levels can be infinitely variable and is preferably likewise carried out under characteristic control by the electrical control unit 41. Another variant of the division of the supply pressure of the valve control device during the operation of the
  • the internal combustion engine represents the gradual setting of different supply pressure levels.
  • several pressure levels are provided, preferably two supply pressure level levels being sufficient.
  • a first lower pressure level level covers the operating range of the internal combustion engine, in which it is operated at low or medium speed, load and temperature.
  • the second pressure level is only set on the high-pressure pump 23 when the internal combustion engine is operated in extreme operating conditions. These extreme operating conditions are, for example, a very low ambient temperature, high speeds and high loads.
  • high restoring moments act on the valve member 3 of the gas exchange valve, which also require high adjustment pressures of the hydraulic pressure medium.
  • a hysteresis function is interposed between these border areas between the pressure levels. This hysteresis function causes, for example, a
  • valve actuator it is thus possible for the valve actuator to achieve significant energy savings in the most frequently used operating range of the internal combustion engine to be supplied. This energy saving is achieved by a corresponding reduction in the

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

L'invention concerne un procédé de commande d'une valve d'échange gazeux de moteurs à combustion interne comprenant un obturateur mobile (3). Cet obturateur présente, à son extrémité proche de la chambre de combustion, une surface d'étanchéité (7) par laquelle il coopère avec un siège de valve (9) en vue de commander une section d'admission ou une section d'échappement de la chambre de combustion du moteur à combustion interne. Et l'obturateur présente, à son extrémité éloignée de la chambre de combustion, un piston (11) qui délimite au moins une chambre de travail hydraulique (21). Le remplissage de cette chambre de travail (21) en agent de pression hydraulique et l'évacuation alternés de ce dernier permettent le déplacement de l'obturateur (3) dans un sens d'ouverture et dans un sens de fermeture. La pression d'alimentation appliquée pour actionner l'obturateur d'échange gazeux (3) de l'agent de pression est réglée en fonction des paramètres d'exploitation actuels du moteur à combustion interne à alimenter.
EP99913074A 1998-06-12 1999-02-16 Procede de commande d'une valve d'echange gazeux de moteurs a combustion interne Withdrawn EP1029156A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19826045 1998-06-12
DE19826045A DE19826045A1 (de) 1998-06-12 1998-06-12 Verfahren zur Steuerung eines Gaswechselventils für Brennkraftmaschinen
PCT/DE1999/000424 WO1999066178A1 (fr) 1998-06-12 1999-02-16 Procede de commande d'une valve d'echange gazeux de moteurs a combustion interne

Publications (1)

Publication Number Publication Date
EP1029156A1 true EP1029156A1 (fr) 2000-08-23

Family

ID=7870582

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99913074A Withdrawn EP1029156A1 (fr) 1998-06-12 1999-02-16 Procede de commande d'une valve d'echange gazeux de moteurs a combustion interne

Country Status (5)

Country Link
US (1) US6321702B1 (fr)
EP (1) EP1029156A1 (fr)
JP (1) JP2002518625A (fr)
DE (1) DE19826045A1 (fr)
WO (1) WO1999066178A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10024268B4 (de) * 2000-05-17 2012-11-29 Robert Bosch Gmbh Vorrichtung zur Benzindirekteinspritzung in einer Kolbenbrennkraftmaschine
US6739293B2 (en) * 2000-12-04 2004-05-25 Sturman Industries, Inc. Hydraulic valve actuation systems and methods
DE10113722A1 (de) 2001-03-21 2002-09-26 Mahle Ventiltrieb Gmbh Hydraulischer Stellantrieb zum Betätigen eines Gaswechselventils eines Verbrennungsmotors
DE10134644A1 (de) * 2001-07-17 2003-02-06 Bosch Gmbh Robert Elektrohydraulische Ventilsteuerung
DE10138881A1 (de) * 2001-08-08 2003-02-27 Bosch Gmbh Robert Verfahren zum Betreiben einer elektrohydraulischen Ventilsteuerung einer Brennkraftmaschine, Computerprogramm sowie Steuer- und Regelgerät zum Betreiben einer Brennkraftmaschine
DE10140528A1 (de) * 2001-08-17 2003-02-27 Bosch Gmbh Robert Vorrichtung zur Steuerung von Gaswechselventilen
US7201121B2 (en) * 2002-02-04 2007-04-10 Caterpillar Inc Combustion engine including fluidically-driven engine valve actuator
DE102004030306A1 (de) * 2004-06-23 2006-01-12 Robert Bosch Gmbh Verfahren zur Erfassung mindestens einer Ventilhubposition bei einer Brennkraftmaschine mit variabler Ventilsteuerung
DE102004050225A1 (de) 2004-10-15 2006-04-20 Robert Bosch Gmbh Verfahren zum Betreiben einer Brennkraftmaschine
US7261070B2 (en) * 2005-03-01 2007-08-28 Jones James W Linear fluid engine
US7555998B2 (en) * 2005-12-01 2009-07-07 Jacobs Vehicle Systems, Inc. System and method for hydraulic valve actuation
FI124245B (en) * 2012-02-16 2014-05-15 Wärtsilä Finland Oy Hydraulic valve arrangement for controlled actuation of the gas exchange valve of the reciprocating internal combustion engine
CN108301892A (zh) * 2018-01-05 2018-07-20 陕西科技大学 内燃机的可变进排气门系统及控制方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05202714A (ja) * 1992-01-30 1993-08-10 Toyota Motor Corp 内燃機関の油圧式弁駆動装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4009695A (en) * 1972-11-14 1977-03-01 Ule Louis A Programmed valve system for internal combustion engine
GB8729657D0 (en) * 1987-12-19 1988-02-03 Lucas Ind Plc Valve actuation system
DE3836725C1 (fr) * 1988-10-28 1989-12-21 Daimler-Benz Aktiengesellschaft, 7000 Stuttgart, De
US4930465A (en) * 1989-10-03 1990-06-05 Siemens-Bendix Automotive Electronics L.P. Solenoid control of engine valves with accumulator pressure recovery
JPH05202712A (ja) * 1992-01-30 1993-08-10 Toyota Motor Corp 内燃機関の油圧式弁駆動装置
WO1996012109A1 (fr) * 1994-02-18 1996-04-25 Nigel Eric Rose Moteurs hydrauliques et mecanismes de moteur
US5419301A (en) 1994-04-14 1995-05-30 Ford Motor Company Adaptive control of camless valvetrain
US5572961A (en) * 1995-04-05 1996-11-12 Ford Motor Company Balancing valve motion in an electrohydraulic camless valvetrain

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05202714A (ja) * 1992-01-30 1993-08-10 Toyota Motor Corp 内燃機関の油圧式弁駆動装置

Also Published As

Publication number Publication date
DE19826045A1 (de) 2000-01-13
WO1999066178A1 (fr) 1999-12-23
US6321702B1 (en) 2001-11-27
JP2002518625A (ja) 2002-06-25

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