EP0320536A1 - Kompressionsmotorbremse - Google Patents

Kompressionsmotorbremse Download PDF

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Publication number
EP0320536A1
EP0320536A1 EP87202525A EP87202525A EP0320536A1 EP 0320536 A1 EP0320536 A1 EP 0320536A1 EP 87202525 A EP87202525 A EP 87202525A EP 87202525 A EP87202525 A EP 87202525A EP 0320536 A1 EP0320536 A1 EP 0320536A1
Authority
EP
European Patent Office
Prior art keywords
valve
exhaust
internal combustion
exhaust 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
EP87202525A
Other languages
English (en)
French (fr)
Inventor
Jan Kruithof
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.)
Van Doorne's Bedrijfswagenfabriek DAF BV
Original Assignee
Van Doorne's Bedrijfswagenfabriek DAF BV
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 Van Doorne's Bedrijfswagenfabriek DAF BV filed Critical Van Doorne's Bedrijfswagenfabriek DAF BV
Priority to EP87202525A priority Critical patent/EP0320536A1/de
Publication of EP0320536A1 publication Critical patent/EP0320536A1/de
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
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/04—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning exhaust conduits
    • F02D9/06—Exhaust brakes
    • 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
    • F01L13/06—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for braking

Definitions

  • the invention relates to an internal combustion engine, comprising cylinders with pistons and in- and exhaust valves, an exhaust system, an engine brake that is provided with means for destroying the compression energy at the end of the compression stroke.
  • This type of internal combustion engine is generally known.
  • Another method comprises closing a valve of the exhaust system, resulting in higher pressure than usual in the cylinder during the exhaust stroke (exhaust throttling).
  • the braking action of an internal combustion engine is partly con­stituted as a result of loss due to friction and partly as a re­sult of indicated energy.
  • the above-stated pre-exhaust has the disadvantage that a compli­cated engine structure is required, since one must be able to interrupt the pre-exhaust during normal engine operation, for which purpose special profiles and/or operational mechanisms are required.
  • the energy absorbed by the engine should be disposed of to the en­vironment, preferably by a temperature increase of the exhaust gas.
  • the fuel consumption of the normal operating engine should not increase.
  • the invention aims to remove the above-indicated drawbacks and to increase the average effective brake action in internal combustion engines within the scope of the stated secondary terms, in parti­cular in super-charged engines.
  • the invention is characterized in that the en­gine brake comprises means for closing a brake valve in the ex­haust system in order to create a pressure increase in the cylin­der, means for opening the exhaust valve during the inlet stroke of the piston synchronously to the number of revolutions per mi­nute of the engine to such an extent that exhaust gas flows back through said cylinder exhaust valve of the exhaust system to the cylinder.
  • ABS anti-blocking system
  • Said means for destroying the increased compression energy after the decompression stroke can e.g. consist of opening the outlet at the top dead centre.
  • the partly shown cylinder 2 in which a piston 1 is mounted has a head 2 with inlet valve 3 and an exhaust valve 4, both provided with a valve spring 5, and a valve stem 6.
  • the exhaust valve 4 is operated by a valve rocker 7 that is operable by a cam, a hydrau­lic or an electromagnetic system.
  • the cylinder head furthermore comprises an inlet system 8 and an exhaust system 9 in which a brake valve 10 has been mounted.
  • the exhaust valve 4 is opened via a valve rocker by a cam shaft (not shown). This can take place indirect through a bar system or direct from the cam system. The opening of the exhaust valve 4 can take place at any desired time.
  • the rigidity of the exhaust valve spring is such that the valve opens spontaneously under the in­fluence of a pressure build-up in the exhaust system 9 by means of the operable brake valve 10.
  • the exhaust valve opens at the bottom dead centre of the piston under the influence of gas forces. This can to a limited extent be arranged by the choice of the closing force and the rigidity of the valve spring. The further course of the cycle in the internal combustion engine is equal to that of the embodiment of figure 1. Closing the brake valve can be performed manually, hydraulically, electrically or pneumatically (not shown).
  • an exhaust valve 4 is applied that has in its closed position a permanent (small) opening (negative valve clearance).
  • the clearance amounts to some tenths of millimeters. This con­struction provides the possibility of both an increased charge during the inlet stroke and a decompression during the compression stroke.
  • the adjustment means is e.g. operable by an eccentric cam (not shown) mounted on the shaft of the valve rocker.
  • this valve will be opened when nearing the end of the compression stroke by e.g. an hydraulic coupling between the exhaust valve and a cam suited for this purpose. If no cams with a suitable time adjustment are available, an extra cam per cylinder is required.
  • the special valve operation (not shown) is interrupted during normal operation of the engine.

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)
EP87202525A 1987-12-15 1987-12-15 Kompressionsmotorbremse Ceased EP0320536A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP87202525A EP0320536A1 (de) 1987-12-15 1987-12-15 Kompressionsmotorbremse

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP87202525A EP0320536A1 (de) 1987-12-15 1987-12-15 Kompressionsmotorbremse

Publications (1)

Publication Number Publication Date
EP0320536A1 true EP0320536A1 (de) 1989-06-21

Family

ID=8197722

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87202525A Ceased EP0320536A1 (de) 1987-12-15 1987-12-15 Kompressionsmotorbremse

Country Status (1)

Country Link
EP (1) EP0320536A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3922884A1 (de) * 1989-07-12 1991-01-24 Man Nutzfahrzeuge Ag Motorbremse fuer luftverdichtende brennkraftmaschinen
WO1996005415A1 (de) * 1994-08-08 1996-02-22 Fev Motorentechnik Gmbh & Co. Kommanditgesellschaft Motorbremsvorrichtung für einen nutzfahrzeugmotor
EP0736672A2 (de) * 1995-04-04 1996-10-09 Steyr Nutzfahrzeuge Ag Verfahren zur Motorbremsung mit einem 4-Takt-Verbrennungsmotor
EP0822321A1 (de) * 1996-04-16 1998-02-04 Daimler-Benz Aktiengesellschaft Verfahren zum Abbremsen einer Viertakt-Brennkraftmaschine, insbesondere für den Antrieb eines Fahrzeuges
DE19852552A1 (de) * 1998-11-13 2000-05-25 Daimler Chrysler Ag Verfahren zum Betrieb eines im Viertakt arbeitenden Verbrennungsmotors
DE10250771B4 (de) * 2002-10-30 2014-09-11 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Motorbremseinrichtung und Verfahren zu deren Steuerung

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE335332C (de) * 1916-04-18 1921-03-31 Last Automobilfabrik A G Deuts Auspuff- und Bremssteuerung fuer Explosionskraftmaschinen
CH118905A (de) * 1926-02-11 1927-02-16 Franz Brozincevic & Cie Zum Bremsen benutzbarer Viertaktmotor für Fahrzeuge.
CH306146A (de) * 1952-09-24 1955-03-31 Saurer Ag Adolph Verfahren zur Motorbremsung von Kraftfahrzeugen mit Viertakt-Kolbenbrennkraftmaschine und Brennkraftmaschine zur Durchführung des Verfahrens.
US3234923A (en) * 1962-06-18 1966-02-15 Caterpillar Tractor Co Method and braking system for internal combustion engines
DE2832526A1 (de) * 1978-07-25 1980-02-07 Maschf Augsburg Nuernberg Ag Viertakt-brennkraftmaschine mit motor-auspuffbremse
GB2162580A (en) * 1984-08-03 1986-02-05 Daimler Benz Ag Control of exhaust valves and exhaust brake of an internal combustion engine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE335332C (de) * 1916-04-18 1921-03-31 Last Automobilfabrik A G Deuts Auspuff- und Bremssteuerung fuer Explosionskraftmaschinen
CH118905A (de) * 1926-02-11 1927-02-16 Franz Brozincevic & Cie Zum Bremsen benutzbarer Viertaktmotor für Fahrzeuge.
CH306146A (de) * 1952-09-24 1955-03-31 Saurer Ag Adolph Verfahren zur Motorbremsung von Kraftfahrzeugen mit Viertakt-Kolbenbrennkraftmaschine und Brennkraftmaschine zur Durchführung des Verfahrens.
US3234923A (en) * 1962-06-18 1966-02-15 Caterpillar Tractor Co Method and braking system for internal combustion engines
DE2832526A1 (de) * 1978-07-25 1980-02-07 Maschf Augsburg Nuernberg Ag Viertakt-brennkraftmaschine mit motor-auspuffbremse
GB2162580A (en) * 1984-08-03 1986-02-05 Daimler Benz Ag Control of exhaust valves and exhaust brake of an internal combustion engine

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3922884A1 (de) * 1989-07-12 1991-01-24 Man Nutzfahrzeuge Ag Motorbremse fuer luftverdichtende brennkraftmaschinen
WO1996005415A1 (de) * 1994-08-08 1996-02-22 Fev Motorentechnik Gmbh & Co. Kommanditgesellschaft Motorbremsvorrichtung für einen nutzfahrzeugmotor
US5730102A (en) * 1994-08-08 1998-03-24 Fev Motorentechnik Gmbh & Co. Kommanditgesellschaft Engine brake device for a commercial vehicle
EP0736672A2 (de) * 1995-04-04 1996-10-09 Steyr Nutzfahrzeuge Ag Verfahren zur Motorbremsung mit einem 4-Takt-Verbrennungsmotor
EP0736672A3 (de) * 1995-04-04 1997-03-19 Steyr Nutzfahrzeuge Verfahren zur Motorbremsung mit einem 4-Takt-Verbrennungsmotor
EP0822321A1 (de) * 1996-04-16 1998-02-04 Daimler-Benz Aktiengesellschaft Verfahren zum Abbremsen einer Viertakt-Brennkraftmaschine, insbesondere für den Antrieb eines Fahrzeuges
DE19852552A1 (de) * 1998-11-13 2000-05-25 Daimler Chrysler Ag Verfahren zum Betrieb eines im Viertakt arbeitenden Verbrennungsmotors
DE19852552C2 (de) * 1998-11-13 2000-10-05 Daimler Chrysler Ag Verfahren zum Betrieb eines im Viertakt arbeitenden Verbrennungsmotors
DE10250771B4 (de) * 2002-10-30 2014-09-11 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Motorbremseinrichtung und Verfahren zu deren Steuerung

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