WO2003019003A1 - Procede de demarrage d'un moteur a combustion interne multicylindrique - Google Patents

Procede de demarrage d'un moteur a combustion interne multicylindrique Download PDF

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Publication number
WO2003019003A1
WO2003019003A1 PCT/DE2002/002121 DE0202121W WO03019003A1 WO 2003019003 A1 WO2003019003 A1 WO 2003019003A1 DE 0202121 W DE0202121 W DE 0202121W WO 03019003 A1 WO03019003 A1 WO 03019003A1
Authority
WO
WIPO (PCT)
Prior art keywords
valves
internal combustion
combustion engine
starting
crankshaft
Prior art date
Application number
PCT/DE2002/002121
Other languages
German (de)
English (en)
Inventor
Hermann Gaessler
Udo Diehl
Karsten Mischker
Rainer Walter
Bernd Rosenau
Stefan Franzl
Jürgen Schiemann
Christian Grosse
Volker Beuche
Stefan Reimer
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 WO2003019003A1 publication Critical patent/WO2003019003A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N19/00—Starting aids for combustion engines, not otherwise provided for
    • F02N19/004—Aiding engine start by using decompression means or variable valve actuation
    • 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
    • F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
    • 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
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L2003/25—Valve configurations in relation to engine
    • 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

Definitions

  • the invention relates to a method for starting a multi-cylinder internal combustion engine.
  • the suction, compression, work and exhaust work cycles are controlled by opening and closing the intake and exhaust valves.
  • several pistons occupy the same position due to the improved mesh compensation. This means that, for example, in a 4-cylinder in-line engine, cylinders 1 and 4 are simultaneously in UT and _in TDC. The same applies to cylinders 2 and 3.
  • cylinders 1 and 4 and 2 and 3 work out of phase by 360 °.
  • the object of the invention is achieved in that the position of the pistons and the rotational speed of the crankshaft is recorded, the valve lift and / or the control times of the intake valves are calculated as a function of the rotational speed of the crankshaft, the intake valves of those cylinders whose pistons are at top dead center are opened, the inlet valves are closed after the intake stroke has ended, the fuel / air mixture is ignited after the compression stroke has ended and the exhaust valves are opened after the work stroke has ended.
  • the method according to the invention which uses the rotational speed of the crankshaft to calculate an optimal valve lift, improves the mixture formation during the intake stroke, so that a better starting behavior can be achieved. If the valve lift is small, the flow rate of the intake air is higher in the intake stroke, so that there is better swirling and mixing with the fuel. This effect leads to an increased ignitability of the fuel-air mixture. Since in modern internal combustion engines .a detecting the rotational speed of the crankshaft is present in any case, the author's invention resulting from -the realization TATIONS 'for. Starting the engine has no significant cost.
  • the control of the inlet valves and the outlet valves takes place electro-hydraulically and / or that the pressure in the hydraulic part of the electro-hydraulic control is also controlled in order to control the intake valves and the exhaust valves.
  • This measure further improves the control of the intake and exhaust valves depending on the speed of the crankshaft. For example, by reducing the pressure, the smallest valve lifts can be controlled with extremely low rotational speeds of the crankshaft with sufficient accuracy, which is of considerable importance in the practical implementation of the method according to the invention. At high speeds and correspondingly large valve strokes, it is advisable to raise the pressure in the hydraulic part of the electrohydraulic control so that quick control movements of the inlet valves and the outlet valves are possible.
  • the intake valves and the exhaust valves can also be controlled electromagnetically.
  • the transition from the operation of the internal combustion engine to the normal ignition sequence can take place either as a function of a specific speed or a specific number of revolutions of the crankshaft.
  • the method according to the invention is suitable both for gasoline engines and for diesel engines.
  • Figure 1 the crankshaft of a 4-cylinder in-line engine in a schematic representation
  • FIG. 2 is a block diagram of an electro-hydraulic. controlled starter valve
  • crankshaft 1 of a 4-cylinder in-line engine is shown schematically.
  • the crankshaft 1 is supported in three bearings 3 and has the crank pins I, II, III and IV. From Figure 1 it can be seen that the crank pins I and IV, and II and III extend in the same direction.
  • the pistons (not shown), which are connected to the crank pins I and IV via connecting rods, also not shown, have the same position. The same applies to the pistons, also not shown, which are connected to the crank pins II and III.
  • the method for starting a multi-cylinder internal combustion engine can also be used for engines with a different number of cylinders or another
  • V engines, W engines Arrangement of the cylinders (V engines, W engines) can be achieved.
  • the method according to the invention can also be used for engine types in which pistons of different cylinders do not assume the same position (radial engines). In this case, each cylinder that has reached TDC is activated so that an intake stroke takes place.
  • the fastest possible torque build-up and thus an improved starting behavior can also be achieved.
  • an inlet valve 5 is shown, which is controlled by a double-acting hydraulic cylinder 7.
  • the working spaces 9 and 11 of the hydraulic cylinder 7 are supplied with hydraulic fluid under pressure via hydraulic lines 13 and a pump 15.
  • the delivery flow of the pump 15 is controlled by a first switching valve 17 and a second switching valve 19.
  • the first switching valve 17 and the second switching valve 19 are designed as solenoid valves.
  • other types can also be used to carry out the method according to the invention.
  • valve lift and the dynamics of opening or closing the inlet valve 5 can be within wide limits Requirements of the internal combustion engine (not shown) are adapted. Depending on the operating conditions and ambient conditions of the internal combustion engine, this allows optimal control of the inlet valve 5, which contributes to a further improved starting behavior of the internal combustion engine. The same applies in a corresponding manner to the exhaust valves (not shown) of the internal combustion engine (also not shown).
  • the first switching valve 17, the second switching valve 19 and the pump 15 are controlled by a control device, which is not shown in FIG. 2.

Landscapes

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

Abstract

L'invention concerne un procédé de démarrage d'un moteur à combustion interne multicylindrique dépourvu d'arbres à cames. Selon ce procédé, les soupapes d'admission sont ouvertes dès que le premier PMH a été atteint pour permettre l'admission d'air de combustion. Il est possible d'améliorer la carburation lors de la course d'admission si la commande de levée des soupapes d'admission s'effectue en fonction du nombre de tours du moteur. Ainsi, ce procédé permet d'obtenir dans l'ensemble un meilleur comportement au démarrage du moteur à combustion interne que les procédés selon l'art antérieur.
PCT/DE2002/002121 2001-08-16 2002-06-11 Procede de demarrage d'un moteur a combustion interne multicylindrique WO2003019003A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10140063.2 2001-08-16
DE10140063A DE10140063A1 (de) 2001-08-16 2001-08-16 Verfahren zum Starten einer Mehrzylinderbrennkraftmaschine

Publications (1)

Publication Number Publication Date
WO2003019003A1 true WO2003019003A1 (fr) 2003-03-06

Family

ID=7695526

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2002/002121 WO2003019003A1 (fr) 2001-08-16 2002-06-11 Procede de demarrage d'un moteur a combustion interne multicylindrique

Country Status (2)

Country Link
DE (1) DE10140063A1 (fr)
WO (1) WO2003019003A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1577544A3 (fr) * 2004-03-19 2007-02-14 Ford Global Technologies, LLC Démarrage d'un moteur avec des valves électromécaniques
US7280909B2 (en) 2004-03-19 2007-10-09 Ford Global Technologies Llc Valve control for an engine with electromechanically actuated valves
US7334549B2 (en) 2004-03-19 2008-02-26 Ford Global Technologies, Llc Multi-stroke cylinder operation in an internal combustion engine
US7367921B2 (en) 2004-03-19 2008-05-06 Ford Global Technologies, Llc Electromechanically actuated valve control for an internal combustion engine
US7650745B2 (en) 2004-03-19 2010-01-26 Ford Global Technologies, Llc Method to reduce engine emissions for an engine capable of multi-stroke operation and having a catalyst

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5251590A (en) * 1992-06-01 1993-10-12 Caterpillar Inc. Method and apparatus for starting an engine utilizing unit valve actuation
DE19742969A1 (de) 1997-09-29 1999-04-08 Siemens Ag Verfahren zum Starten einer Mehrzylinderbrennkraftmaschine
DE19850142C1 (de) * 1998-10-30 2000-05-25 Isad Electronic Sys Gmbh & Co Verbrennungsmotor, insbesondere für ein Kraftfahrzeug, sowie Verfahren zum Starten desselben
JP2001159353A (ja) * 1999-12-01 2001-06-12 Nissan Motor Co Ltd 可変動弁エンジンの始動装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3730001A1 (de) * 1987-09-08 1989-03-30 Gerhard Werner Kappelmeier Ventilbetaetigungsmechanismus fuer eine verbrennungskraftmaschine
DE19851214C1 (de) * 1998-11-06 1999-11-04 Daimler Chrysler Ag Verfahren zum Betrieb der Brennkraftmaschine eines Kraftfahrzeugs

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5251590A (en) * 1992-06-01 1993-10-12 Caterpillar Inc. Method and apparatus for starting an engine utilizing unit valve actuation
DE19742969A1 (de) 1997-09-29 1999-04-08 Siemens Ag Verfahren zum Starten einer Mehrzylinderbrennkraftmaschine
DE19850142C1 (de) * 1998-10-30 2000-05-25 Isad Electronic Sys Gmbh & Co Verbrennungsmotor, insbesondere für ein Kraftfahrzeug, sowie Verfahren zum Starten desselben
JP2001159353A (ja) * 1999-12-01 2001-06-12 Nissan Motor Co Ltd 可変動弁エンジンの始動装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 23 10 February 2001 (2001-02-10) *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1577544A3 (fr) * 2004-03-19 2007-02-14 Ford Global Technologies, LLC Démarrage d'un moteur avec des valves électromécaniques
US7280909B2 (en) 2004-03-19 2007-10-09 Ford Global Technologies Llc Valve control for an engine with electromechanically actuated valves
US7334549B2 (en) 2004-03-19 2008-02-26 Ford Global Technologies, Llc Multi-stroke cylinder operation in an internal combustion engine
US7367921B2 (en) 2004-03-19 2008-05-06 Ford Global Technologies, Llc Electromechanically actuated valve control for an internal combustion engine
US7650745B2 (en) 2004-03-19 2010-01-26 Ford Global Technologies, Llc Method to reduce engine emissions for an engine capable of multi-stroke operation and having a catalyst
US8191355B2 (en) 2004-03-19 2012-06-05 Ford Global Technologies, Llc Method to reduce engine emissions for an engine capable of multi-stroke operation and having a catalyst

Also Published As

Publication number Publication date
DE10140063A1 (de) 2003-06-12

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