EP0370218A1 - Moteur à combustion interne à quatre temps - Google Patents

Moteur à combustion interne à quatre temps Download PDF

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Publication number
EP0370218A1
EP0370218A1 EP89118790A EP89118790A EP0370218A1 EP 0370218 A1 EP0370218 A1 EP 0370218A1 EP 89118790 A EP89118790 A EP 89118790A EP 89118790 A EP89118790 A EP 89118790A EP 0370218 A1 EP0370218 A1 EP 0370218A1
Authority
EP
European Patent Office
Prior art keywords
combustion engine
internal combustion
braking
valves
valve
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.)
Granted
Application number
EP89118790A
Other languages
German (de)
English (en)
Other versions
EP0370218B1 (fr
Inventor
Eckhard Weiss
Horst Bergmann
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.)
Daimler Benz AG
Original Assignee
Daimler Benz AG
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 Daimler Benz AG filed Critical Daimler Benz AG
Publication of EP0370218A1 publication Critical patent/EP0370218A1/fr
Application granted granted Critical
Publication of EP0370218B1 publication Critical patent/EP0370218B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/04—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation using engine as brake
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four

Definitions

  • the invention relates to a four-stroke internal combustion engine according to the preamble of claim 1.
  • a four-stroke internal combustion engine in which braking is brought about by the fact that compressed air from the cylinder chamber is passed through additional exhaust valves, which are actuated by an adjusting device, into the exhaust port of the internal combustion engine during the entire braking process and that the exhaust gases of the internal combustion engine are throttled by a throttle valve which can be adjusted by means of an actuating device in the outlet duct of the internal combustion engine, the adjusting device and the actuating device being actuated by a directional control valve which can be adjusted as a function of the brake pedal.
  • the additional exhaust valves and the exhaust throttle valve can be actuated in any sequence and combination by actuating the brake pedal.
  • the object of the invention is to design an internal combustion engine of the generic type so that safe engine operation is ensured in the entire speed range without disadvantage for the braking process of the vehicle.
  • a speed switch is provided in the control circuit of the engine brake, which, when the engine speed falls below a lower limit, either only prevents the opening of the additional exhaust valves or additionally also closes the exhaust gas throttle valve.
  • the effect of the engine brake is at least partially canceled and the engine is reliably prevented from dying.
  • FIG. 1 shows schematically a 6-cylinder in-line internal combustion engine 1 with its exhaust port 2.
  • a throttle valve 3 is provided, which can be adjusted via an actuator 4.
  • engine braking is achieved in a known manner by opening an additional exhaust valve 5 for each of the cylinders 6 of the internal combustion engine 1.
  • These additional exhaust valves 5 each have their own actuating device 7.
  • the actuating device 4 of the throttle valve 3 can be controlled via a control line 10 and the actuating devices 7 of the additional outlet valves 5 via a control line 11 by means of a directional valve 9 which is acted upon by an auxiliary line through a supply line 8.
  • the directional control valve 9 - provided the speed switch 13 arranged in the control path of the valve is in its closed position - changes into its working position and guides the auxiliary person, who can be compressed air or compressed oil, for example, via the supply line 8 and the control lines 10 and 11 to the actuators 4 and 7 respectively.
  • the throttle valve 3 moves into its closed position and the additional exhaust valves 5 open in order to discharge compressed air from the cylinders 6 into the exhaust port 2 of the internal combustion engine 1. In this way, one finds Engine braking instead.
  • an adjusting device 16 is actuated via the directional valve 9 and a control line 15, which interrupts the fuel delivery to the injection pump 17.
  • a speed sensor 14 arranged on the internal combustion engine 1 detects that the speed drops into the idling range by falling below a lower speed limit, the speed switch 13 is brought into its open position and thus interrupts the actuation of the directional control valve 9 regardless of the position of the brake switch 12.
  • the directional control valve 9 returns to its rest position, so that the pressure in the control lines 10, 11 and 15 is reduced and the throttle valve 3 is opened or the additional exhaust valves 5 are closed.
  • fuel is again supplied to the injection pump 17. This prevents the internal combustion engine 1 from dying due to a lack of ignition due to open additional exhaust valves or due to excessive exhaust gas back pressure.
  • the operating behavior of the internal combustion engine 1 in the idling range thus corresponds exactly to the operating behavior without engine braking.
  • the engine brake is only available again when the speed of the internal combustion engine 1 has exceeded the limit value again.
  • FIG. 2 corresponds in principle to that described in FIG. 1. Matching parts are provided with the same reference numerals.
  • the Actuators 7 of the additional exhaust valves 5 in this embodiment are not actuated together with the actuation device 4 of the throttle valve 3, but are actuated separately from them via a separate directional valve 18, which is supplied with the auxiliary force - compressed oil or compressed air - via the feed line 19.
  • the speed switch 13 is opened, ie when the speed falls below the limit and the transition to the idling range, only the directional valve 15 for the additional exhaust valves 5, but not the directional valve 9 for the throttle valve 3, returns to its rest position.
  • the braking effect is maintained by the exhaust gas throttle valve 3 in the idling range of the internal combustion engine 1 when the brake pedal 12 is actuated.
  • the internal combustion engine 1 is prevented from dying by the fact that the additional exhaust valves 5 are always in the closed position in this engine operating range.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Valve Device For Special Equipments (AREA)
EP89118790A 1988-11-23 1989-10-10 Moteur à combustion interne à quatre temps Expired - Lifetime EP0370218B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3839449A DE3839449A1 (de) 1988-11-23 1988-11-23 Viertakt-brennkraftmaschine
DE3839449 1988-11-23

Publications (2)

Publication Number Publication Date
EP0370218A1 true EP0370218A1 (fr) 1990-05-30
EP0370218B1 EP0370218B1 (fr) 1993-05-26

Family

ID=6367665

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89118790A Expired - Lifetime EP0370218B1 (fr) 1988-11-23 1989-10-10 Moteur à combustion interne à quatre temps

Country Status (4)

Country Link
US (1) US5036811A (fr)
EP (1) EP0370218B1 (fr)
JP (1) JPH02181012A (fr)
DE (2) DE3839449A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4038334C1 (fr) * 1990-12-01 1991-11-28 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De
US5540201A (en) 1994-07-29 1996-07-30 Caterpillar Inc. Engine compression braking apparatus and method
US5647318A (en) 1994-07-29 1997-07-15 Caterpillar Inc. Engine compression braking apparatus and method
US5526784A (en) 1994-08-04 1996-06-18 Caterpillar Inc. Simultaneous exhaust valve opening braking system
DE19844571C2 (de) * 1998-09-29 2000-08-03 Daimler Chrysler Ag Motorbremsverfahren für eine aufgeladene Brennkraftmaschine
US7926464B2 (en) * 2008-02-29 2011-04-19 Caterpillar Inc. Power source braking system to prevent engine stalls
NL2007584C2 (nl) * 2011-10-12 2012-12-05 Thermass Innovations B V Plunjerpomp/-motor.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4223649A (en) * 1976-06-01 1980-09-23 Robinson Charles E Motor brake control system
EP0193142A1 (fr) * 1985-02-27 1986-09-03 Klöckner-Humboldt-Deutz Aktiengesellschaft Dispositif de frein moteur pour moteur à combustion interne
DE3529767A1 (de) * 1975-09-06 1987-02-26 Kloeckner Humboldt Deutz Ag Motorbremsvorrichtung fuer eine brennkraftmaschine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB859800A (en) * 1958-02-21 1961-01-25 Magneti Marelli Spa Electro pneumatic servocontrol device for the exhaust brake of internal combustion engines of vehicles
DE1207704B (de) * 1961-02-21 1965-12-23 Om Societa Per Azioni Vorrichtung zum drehzahlabhaengigen selbsttaetigen Aus- bzw. Wiedereinschalten einerMotorbremse
JPS5833239Y2 (ja) * 1977-06-25 1983-07-25 株式会社ボッシュオートモーティブ システム デイ−ゼルエンジンのスト−ル防止装置
JPS57171011A (en) * 1981-04-13 1982-10-21 Mitsubishi Motors Corp Braking device for multicylinder four stroke cycle internal combustion engine
DE3428626A1 (de) * 1984-08-03 1986-02-13 Daimler-Benz Ag, 7000 Stuttgart Viertakt-brennkraftmaschine
DE3428627A1 (de) * 1984-08-03 1986-02-13 Daimler-Benz Ag, 7000 Stuttgart Viertakt-brennkraftmaschine
DE3712020A1 (de) * 1987-04-09 1988-10-27 Schaeffler Waelzlager Kg Ventilsteuereinrichtung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3529767A1 (de) * 1975-09-06 1987-02-26 Kloeckner Humboldt Deutz Ag Motorbremsvorrichtung fuer eine brennkraftmaschine
US4223649A (en) * 1976-06-01 1980-09-23 Robinson Charles E Motor brake control system
EP0193142A1 (fr) * 1985-02-27 1986-09-03 Klöckner-Humboldt-Deutz Aktiengesellschaft Dispositif de frein moteur pour moteur à combustion interne

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 9, no. 215 (M-409)(1938) 3 September 1985, & JP-A-60 75727 (AKIRA SUZUKI) 30 April 1985, *

Also Published As

Publication number Publication date
US5036811A (en) 1991-08-06
DE58904491D1 (de) 1993-07-01
DE3839449A1 (de) 1990-05-31
EP0370218B1 (fr) 1993-05-26
JPH02181012A (ja) 1990-07-13
JPH0432206B2 (fr) 1992-05-28

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