EP1250519B1 - Ventilabstimmung mit hilfe der abgaswerte und der lambdasonde für einen verbrennungsmotor - Google Patents

Ventilabstimmung mit hilfe der abgaswerte und der lambdasonde für einen verbrennungsmotor Download PDF

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Publication number
EP1250519B1
EP1250519B1 EP00992089A EP00992089A EP1250519B1 EP 1250519 B1 EP1250519 B1 EP 1250519B1 EP 00992089 A EP00992089 A EP 00992089A EP 00992089 A EP00992089 A EP 00992089A EP 1250519 B1 EP1250519 B1 EP 1250519B1
Authority
EP
European Patent Office
Prior art keywords
valve
exhaust gas
valves
engine
internal combustion
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.)
Expired - Lifetime
Application number
EP00992089A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1250519A2 (de
Inventor
Jochen Burgdorf
Bernhard Giers
Peter Volz
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.)
Continental Teves AG and Co OHG
Original Assignee
Continental Teves AG and Co OHG
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
Priority claimed from DE10048263A external-priority patent/DE10048263A1/de
Application filed by Continental Teves AG and Co OHG filed Critical Continental Teves AG and Co OHG
Publication of EP1250519A2 publication Critical patent/EP1250519A2/de
Application granted granted Critical
Publication of EP1250519B1 publication Critical patent/EP1250519B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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

Definitions

  • the invention relates to a method for operating an internal combustion engine according to the preamble of patent claim 1.
  • the gas exchange valves are selectively adjustable by a cylinder selectively to a desired valve opening characteristic, for which the solenoid valves are actuated by means of electrical pulses of variable duration at different times selected.
  • the object of the present invention is to develop a method for operating a multi-cylinder internal combustion engine with which the cylinder fillings of all engine cylinders can be adjusted taking into account minimum exhaust gas values.
  • FIG. 1 discloses a schematic diagram of an electro-hydraulic valve actuation system, with a valve train arranged in the cylinder head 1 of an internal combustion engine, consisting of a camshaft 2, a plunger assembly 3 and a gas exchange valve 5 extending into the intake passage 4 of the internal combustion engine as an intake valve.
  • the gas exchange valve 5 is not actuated directly by the plunger assembly 3, but by means of a pressure medium volume provided by the engine oil pump 6 with respect to the movement sequence, for which purpose a solenoid valve 7 is inserted into the cylinder head 1 in order to be able to vary the pressure medium volume clamped between the tappet assembly 3 and the gas exchange valve 5.
  • valve actuation system Since it is a multi-cylinder internal combustion engine, according to the number of gas exchange valves and the already mentioned above other components of the electro-hydraulic valve actuation system are several times available.
  • the valve actuation system also has per engine cylinder to a buffer 8, which takes in case of need excess pressure fluid volume that is not needed to control the valve actuation system accommodates.
  • an injection valve 20 is arranged, which can also be operated as the solenoid valve 7 by means of variable drive voltage and / or variable drive current for balancing all engine cylinders to uniform injection quantities.
  • FIG. 2 shows, by way of example, the valve lift curves which can be set in principle with the presented variable valve actuation system according to FIG. 1 and are also plotted for reduced valve opening clearances of 40 degrees, 80 degrees and 120 degrees camshaft angle starting from a maximum camshaft angle illustrated on the abscissa.
  • the possible valve lift for each camshaft angle is plotted, which inevitably has the smallest camshaft angle of 40 degrees and the smallest valve lift of about 3.8 mm.
  • FIG. 3 shows the individual method steps for equalizing the valve lifts and thus the valve opening times for all the gas exchange valves 5 of a multi-cylinder internal combustion engine, which is preferably connected to the from Fig. 1 known electro-hydraulic valve actuation system is equipped.
  • the system-related uncertainties and tolerances in the control of the electromagnetic valves 7 and in the valve drive can be compensated such that each valve operating system is selectively tuned to an optimal exhaust emission while the internal combustion engine is running, the control parameters obtained for the Solenoid valves 7 are stored in a data memory.
  • the internal combustion engine is preferably operated in the speed band in which unacceptable deviations of the exhaust emission of the individual engine cylinders result from each other.
  • the exhaust emission is detected in a known per se via a lambda control circuit.
  • the drive voltage or drive currents of each solenoid valve 7 are then varied according to the program flowchart and cylinder-selectively stored in the data memory and detected as a function of the engine speed parameter. Based on the parameter map thus defined from cylinder to cylinder, the entire actuation of the electromagnetic valves 7 takes place.
  • each operation of the internal combustion engine is carried out for the purpose of control and thus concretely for the adjustment of the gas exchange valves 5 with each other an initialization of the solenoid valves 7 all engine cylinders according to a first operation step 9.
  • a second operation step 10 the worst exhaust value is initiated and the number of iteration steps and the iteration increment established.
  • a third operation step according to the diamond 11 it is determined whether the engine speed is in a predetermined speed band. If this condition is not met, a renewed interrogation of the engine speed from the engine control unit takes place via a loop 11a.
  • step 16 it is checked whether all iteration steps have been completed. Unless all the iteration steps have been completed, the loop 16a is used to repeat the valve adjustment procedure beginning at the rhombus 2. If, however, all the iteration steps have been completed, the next solenoid valve 7 is detected according to the field 17. In step 18, it is checked whether the electromagnetic valves 7 of all engine cylinders are adapted. In the case of a negative then carried over the loop 18a a repetition of the flowchart starting with the operation step 10. However, is the adaptation of all engine cylinders completed, then the valve balancing method explained herewith is terminated with the step 19.
  • values for different speed ranges can be determined and stored in a data memory of the engine management or engine control unit.
  • a characteristic field or a parameter set for a mathematical description can be determined.
  • the algorithm can be used in one measurement run.
  • the algorithm can also be used in the normal operating mode of the internal combustion engine, for example to optimize the parameters, e.g. to counteract the influence of the aging of components.
  • the operation step 2 of FIG. 3 would then have to be modified and the engine speed indicated as an index in the map.
  • valve control method in which the exhaust gas emissions are measured for each engine cylinder and then alternately the drive voltage or the drive current with the aim of optimized exhaust gas values is varied as a function of engine crank angle for each solenoid valve 7 and the optimal trigger point T is determined.
  • the determined during the process optimum switching points of the solenoid valves 7 are thus detected individually for each engine cylinder and stored as a function of engine speed as a parameter field in the data memory of the engine control unit. Based on this set parameter field thus takes place a cylinder-selective valve control, which ultimately leads to the same valve strokes of the gas exchange valves 5 in the present example.
  • the valve lifts the solenoid valves 7 but need not necessarily be the same, but can be varied to meet the task rather needs and thus desired.
  • the tolerances of the injection quantity can be adjusted by cylinder-selective control of the injectors 20.
  • the invention is not limited to the structural embodiment of Figure 1, but also suitable for alternative valve train designs, for example, provide a direct electromagnetic actuation of the gas exchange valves and having either a Saugrohr- or direct injection.

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)
EP00992089A 2000-01-14 2000-12-23 Ventilabstimmung mit hilfe der abgaswerte und der lambdasonde für einen verbrennungsmotor Expired - Lifetime EP1250519B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10001196 2000-01-14
DE10001196 2000-01-14
DE10048263A DE10048263A1 (de) 2000-01-14 2000-09-29 Verfahren zum Betrieb eines Verbrennungsmotors
DE10048263 2000-09-29
PCT/EP2000/013254 WO2001051775A2 (de) 2000-01-14 2000-12-23 Ventilabstimmug mit hilfe der abgaswerte und der lambdasonde für einen verbren nungsmotor

Publications (2)

Publication Number Publication Date
EP1250519A2 EP1250519A2 (de) 2002-10-23
EP1250519B1 true EP1250519B1 (de) 2006-03-15

Family

ID=26003842

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00992089A Expired - Lifetime EP1250519B1 (de) 2000-01-14 2000-12-23 Ventilabstimmung mit hilfe der abgaswerte und der lambdasonde für einen verbrennungsmotor

Country Status (5)

Country Link
US (1) US6745122B2 (enExample)
EP (1) EP1250519B1 (enExample)
JP (1) JP2003519743A (enExample)
DE (1) DE50012416D1 (enExample)
WO (1) WO2001051775A2 (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009042544A1 (de) 2009-09-22 2011-03-31 Schaeffler Technologies Gmbh & Co. Kg Elektrohydraulischer Ventiltrieb

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10046221A1 (de) * 2000-09-19 2002-10-02 Bayerische Motoren Werke Ag Verfahren und Vorrichtung zur Steuerung der zylinderselektiven Füllung bei Verbrennungsmotoren mit variablem Ventiltrieb
ITTO20010660A1 (it) * 2001-07-06 2003-01-06 Fiat Ricerche Motore diesel pluricilindrico con azionamento variabile delle valvole.
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
US7007644B2 (en) 2003-12-04 2006-03-07 Mack Trucks, Inc. System and method for preventing piston-valve collision on a non-freewheeling internal combustion engine
EP2067968B1 (en) * 2007-12-04 2011-05-11 C.R.F. Società Consortile per Azioni Multi-cylinder internal combustion engine with independent cylinders
US20090308340A1 (en) * 2008-06-11 2009-12-17 Gm Global Technology Operations, Inc. Cam-Driven Hydraulic Lost-Motion Mechanisms for Overhead Cam and Overhead Valve Valvetrains
DE102008049181A1 (de) * 2008-09-26 2010-04-01 Schaeffler Kg Elektrohydraulische Ventilsteuerung
EP2204566B1 (en) * 2008-12-29 2011-06-29 Fiat Group Automobiles S.p.A. Adaptive control system of the air-fuel ratio of an internal combustione engine with a variable valve timing system
US8469333B2 (en) * 2010-03-13 2013-06-25 Synapse Engineering, Inc. Counter-biased valve and actuator assembly
DE102011011337B3 (de) 2011-02-16 2012-02-16 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Verfahren zur Zylindergleichstellung einer Mehrzylinder-Verbrennungskraftmaschine
US8977478B2 (en) 2011-10-28 2015-03-10 Chrysler Group Llc Method of setting a control parameter for emissions robustness

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JPH0635812B2 (ja) * 1988-10-31 1994-05-11 いすゞ自動車株式会社 電磁力駆動バルブ制御装置
JPH0621530B2 (ja) * 1988-12-29 1994-03-23 いすゞ自動車株式会社 バルブ駆動装置
JPH03164537A (ja) * 1989-11-21 1991-07-16 Mitsubishi Electric Corp 内燃機関のバルブタイミング制御装置
US5377654A (en) * 1992-11-12 1995-01-03 Ford Motor Company System using time resolved air/fuel sensor to equalize cylinder to cylinder air/fuel ratios with variable valve control
US5419301A (en) * 1994-04-14 1995-05-30 Ford Motor Company Adaptive control of camless valvetrain
DE19534878B4 (de) * 1995-09-20 2007-05-03 Fev Motorentechnik Gmbh Verfahren zur automatischen Kalibrierung eines Winkelmarkengebers an der Kurbelwelle einer Kolbenbrennkraftmaschine
JP3075177B2 (ja) * 1996-05-22 2000-08-07 トヨタ自動車株式会社 内燃機関のバルブタイミング制御装置
JP3347950B2 (ja) * 1996-08-28 2002-11-20 株式会社ユニシアジェックス 排気バルブのタイミング制御装置
JPH10205314A (ja) * 1996-12-13 1998-08-04 Fev Motorentechnik Gmbh & Co Kg ガス交換弁の電磁弁駆動部を制御する方法
JP3400752B2 (ja) * 1999-09-06 2003-04-28 三菱電機株式会社 内燃機関用制御装置
JP3873663B2 (ja) * 2001-05-31 2007-01-24 日産自動車株式会社 可変バルブタイミング装置の制御装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009042544A1 (de) 2009-09-22 2011-03-31 Schaeffler Technologies Gmbh & Co. Kg Elektrohydraulischer Ventiltrieb

Also Published As

Publication number Publication date
US20030000488A1 (en) 2003-01-02
US6745122B2 (en) 2004-06-01
WO2001051775A3 (de) 2002-04-11
JP2003519743A (ja) 2003-06-24
DE50012416D1 (de) 2006-05-11
WO2001051775A2 (de) 2001-07-19
EP1250519A2 (de) 2002-10-23

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