EP0167886A1 - Procédé de démarrage d'un moteur à combustion interne - Google Patents

Procédé de démarrage d'un moteur à combustion interne Download PDF

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Publication number
EP0167886A1
EP0167886A1 EP85107506A EP85107506A EP0167886A1 EP 0167886 A1 EP0167886 A1 EP 0167886A1 EP 85107506 A EP85107506 A EP 85107506A EP 85107506 A EP85107506 A EP 85107506A EP 0167886 A1 EP0167886 A1 EP 0167886A1
Authority
EP
European Patent Office
Prior art keywords
starting
opening
advance
valve
combustion engine
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.)
Ceased
Application number
EP85107506A
Other languages
German (de)
English (en)
French (fr)
Inventor
Dieter Grabbe
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.)
MAN Energy Solutions France SAS
Original Assignee
Societe dEtudes de Machines Thermiques SEMT SA
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 Societe dEtudes de Machines Thermiques SEMT SA filed Critical Societe dEtudes de Machines Thermiques SEMT SA
Publication of EP0167886A1 publication Critical patent/EP0167886A1/fr
Ceased legal-status Critical Current

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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
    • F02N9/00—Starting of engines by supplying auxiliary pressure fluid to their working chambers
    • F02N9/04—Starting of engines by supplying auxiliary pressure fluid to their working chambers the pressure fluid being generated otherwise, e.g. by compressing air
    • 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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • 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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/04—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for starting by means of fluid pressure

Definitions

  • the present invention relates to a method for starting an internal combustion engine.
  • the starting of high-power internal combustion engines is obtained by the introduction of compressed air into the cylinders during the downward stroke of the pistons corresponding to the combustion phase of the cycle. This compressed air repels the pistons in turn and causes the rotation of the crankshaft and consequently the compression of the air admitted into the other cylinders.
  • the starting air the pressure of which is about 30 bars
  • the control of which is controlled by the angular position of the shafts at cams.
  • the object of the present invention is to delay the opening of the exhaust valves so as to make the best use of the energy contained in the compressed air.
  • the subject of the present invention is a method for starting an internal combustion engine, in particular a diesel engine, having an advance at the opening of the exhaust valves at the end of the gas expansion stroke, and of which at least a cylinder is provided with a starting valve connected to a source of pressurized fluid and controlled by a control circuit so as to introduce the starting fluid into the cylinders concerned when the pistons are in the phase of the cycle corresponding to the combustion, characterized in that the advance at opening of the exhaust valve or valves of each cylinder equipped with a start-up valve is temporarily reduced to improve the use of the energy contained in the start-up.
  • the presence of this decrease in the opening advance to the duration of the starting sequence and the opening opening of the exhaust valves is reduced by at least 1/3 of the angle of rotation of the corresponding crankshaft to this advance.
  • the present invention also relates to a motor applying the method according to the invention.
  • Figure 1 shows an opening diagram of an exhaust valve in normal operation.
  • Figure 2 shows a diagram of the opening of an exhaust valve during start-up.
  • curve 1 represents the opening of an exhaust valve in normal operation, and it is plotted on the abscissa, an angle representing the angle of rotation of the crankshaft and on the ordinate, a height H representing the valve lift relative to its seat.
  • the point AOE represents the instant of opening of the exhaust valve
  • the point PMB represents the bottom dead center
  • the point TDC represents the top dead center.
  • the distance from point AOE to point PMB represents, in degrees of angle, the advance to the opening of this exhaust valve.
  • the point RFE represents the instant of closure of the valve and the height h represents the maximum lift height of the valve.
  • curve 2 represents the opening of an exhaust valve of a cylinder provided with a starting valve during the starting phase, and the coordinates as well as the characteristic points are, of course, identical to those in Figure 1.
  • curve 2 The essential difference of curve 2 compared to curve 1 lies in the portion 21 where the opening of the exhaust valve is delayed.
  • the portion 22 represents the return of the valve to its normal operating state according to the curve 1 of FIG. 1.
  • the part of the curve 2, located beyond the portion 22, remains similar to that of the curve 1. It it should be noted however that, depending on the device adopted to delay opening, there may appear a slight varia tion in the maximum lift height h of the valve and / or the RFE closing instant between curve 1 and 2. This is not detrimental to the proper functioning of the engine, in particular during starting.
  • the portion 21 of the curve 2 represents at least 1/3 of the angle of rotation of the crankshaft corresponding to this advance.
  • This delay in opening the exhaust valve can be obtained by known means such as, for example, an eccentric mounted on the axis of rotation of a rocker arm, thus allowing the introduction of additional play in the kinematic chain for controlling the valves, or a device moving an intermediate piece between a pusher and the corresponding cam, making it possible to delay the action of the cam on the pusher.
  • This process allows easy starting of all engines, regardless of their number of cylinders, in particular of certain engines that have become transparent as a result of the particular timing of their intake and exhaust cams and their number of cylinders, such as by for example, five-cylinder in-line or ten-cylinder vee engines with starting on a single line of cylinders.
EP85107506A 1984-06-19 1985-06-18 Procédé de démarrage d'un moteur à combustion interne Ceased EP0167886A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8409583 1984-06-19
FR8409583A FR2566050B1 (fr) 1984-06-19 1984-06-19 Procede de demarrage d'un moteur a combustion interne

Publications (1)

Publication Number Publication Date
EP0167886A1 true EP0167886A1 (fr) 1986-01-15

Family

ID=9305191

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85107506A Ceased EP0167886A1 (fr) 1984-06-19 1985-06-18 Procédé de démarrage d'un moteur à combustion interne

Country Status (7)

Country Link
US (1) US4635595A (da)
EP (1) EP0167886A1 (da)
JP (1) JPS6111456A (da)
DK (1) DK274585A (da)
FI (1) FI852410L (da)
FR (1) FR2566050B1 (da)
NO (1) NO852420L (da)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993024741A1 (en) * 1992-06-01 1993-12-09 Caterpillar Inc. A method and apparatus for starting an engine utilizing unit valve actuation
EP1048844A1 (de) * 1999-04-30 2000-11-02 Wärtsilä NSD Schweiz AG Verfahren und Vorrichtung zum Starten, Bremsen und Umsteuern eines Zweitakt-dieselmotors

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6125808A (en) * 1999-04-07 2000-10-03 Timewell; Richard R. Apparatus and method for starting an internal combustion engine
DE10260748A1 (de) * 2002-12-23 2004-07-01 Robert Bosch Gmbh Verfahren zum Betreiben einer Brennkraftmaschine
EP1653078A1 (de) * 2004-10-26 2006-05-03 Wärtsilä Schweiz AG Dieselmaschine, insbesondere Groossdieselmotor, mit einem elektronischen Steuerungssystem und ein Verfahren zum Starten der Dieselmaschine
JP4819703B2 (ja) * 2007-01-12 2011-11-24 アスモ株式会社 車両用ワイパ装置
DK178404B1 (en) * 2014-07-17 2016-02-08 Man Diesel & Turbo Deutschland Large slow-running turbocharged two-stroke self-igniting internal combustion engine with a starting air system
CN104533564A (zh) * 2014-12-19 2015-04-22 朱譞晟 一种双重阿特金森循环内燃机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH125795A (fr) * 1927-01-06 1928-05-16 Harry Bentley Moteur à combustion interne.
US2266077A (en) * 1938-10-03 1941-12-16 Henry A Roan Internal combustion engine
FR2465071A1 (fr) * 1979-09-14 1981-03-20 Schwermasch Liebknecht Veb K Commande a soupape pour le demarrage de moteurs diesel a quatre temps

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1939350A (en) * 1924-09-09 1933-12-12 Jendrassik George Internal combustion engine
US2260983A (en) * 1939-03-22 1941-10-28 Clinton L Walker Control means for internal combustion engines
US3032965A (en) * 1960-07-11 1962-05-08 Roger P Wistner Engine starting apparatus
US3626918A (en) * 1969-07-18 1971-12-14 Trw Inc Starting system for diesel engines
SE421082B (sv) * 1978-04-11 1981-11-23 Nordstjernan Rederi Ab Anordning vid pneumatiska startventiler for dieselmotorer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH125795A (fr) * 1927-01-06 1928-05-16 Harry Bentley Moteur à combustion interne.
US2266077A (en) * 1938-10-03 1941-12-16 Henry A Roan Internal combustion engine
FR2465071A1 (fr) * 1979-09-14 1981-03-20 Schwermasch Liebknecht Veb K Commande a soupape pour le demarrage de moteurs diesel a quatre temps

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993024741A1 (en) * 1992-06-01 1993-12-09 Caterpillar Inc. A method and apparatus for starting an engine utilizing unit valve actuation
EP1048844A1 (de) * 1999-04-30 2000-11-02 Wärtsilä NSD Schweiz AG Verfahren und Vorrichtung zum Starten, Bremsen und Umsteuern eines Zweitakt-dieselmotors

Also Published As

Publication number Publication date
US4635595A (en) 1987-01-13
FR2566050B1 (fr) 1988-09-16
FI852410L (fi) 1985-12-20
JPS6111456A (ja) 1986-01-18
DK274585D0 (da) 1985-06-18
NO852420L (no) 1985-12-20
FR2566050A1 (fr) 1985-12-20
FI852410A0 (fi) 1985-06-18
DK274585A (da) 1985-12-20

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19860715

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Effective date: 19880905

RIN1 Information on inventor provided before grant (corrected)

Inventor name: GRABBE, DIETER