EP1482136B1 - Entlüftungsvorrichtung für eine Brennkraftmaschine - Google Patents

Entlüftungsvorrichtung für eine Brennkraftmaschine Download PDF

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Publication number
EP1482136B1
EP1482136B1 EP04253174A EP04253174A EP1482136B1 EP 1482136 B1 EP1482136 B1 EP 1482136B1 EP 04253174 A EP04253174 A EP 04253174A EP 04253174 A EP04253174 A EP 04253174A EP 1482136 B1 EP1482136 B1 EP 1482136B1
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EP
European Patent Office
Prior art keywords
cylinder head
partition plate
engine
breather
communication passage
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
EP04253174A
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English (en)
French (fr)
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EP1482136A1 (de
Inventor
Hasnan Abdul c/o Yamaha Engine Developments Co. Ltd. . Co Ltd Kahar
Yoshiyuki c/o Yamaha Engine Developments Co. Ltd. Kawagoe
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Petroliam Nasional Bhd Petronas
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Petroliam Nasional Bhd Petronas
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Publication of EP1482136A1 publication Critical patent/EP1482136A1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M13/0416—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil arranged in valve-covers

Definitions

  • the present invention relates to a breather device in an engine.
  • the device is for preventing oil mist being mixed with blow-by gas in a cam chamber between a cylinder head and a cylinder head cover when the blow-by gas having reached the cam chamber is sucked into an intake pipe communicating with a cylinder.
  • US4597372 A discloses an oil separator for blow-by gas in a multi-cylinder internal combustion engine having rotating cams, the oil separator comprising a baffle having a side wall and a bottom wall amongst other features.
  • a breather device in an engine is disclosed in JP-A-2002-129929 .
  • the engine comprises a cylinder head, a cylinder head cover attached to an upper side of the cylinder head to form a cam chamber in conjunction with the cylinder head, a camshaft disposed in the cam chamber and supported on an upper side of the cylinder head for rotation about an axis extending generally horizontally, a partition plate attached to a lower side of the cylinder head cover to form a breather chamber in conjunction with the cylinder head cover, a communication passage formed through the partition plate for communication of the side of the cylinder head and the breather chamber to each other, and a gas passage for communication of an intake passage communicated to a cylinder and the breather chamber to each other.
  • Lubricating oil is stored in the cam chamber.
  • blow-by gas having reached from the cylinder side to the cylinder head side in the cam chamber is sucked through the communication passage, the breather chamber and the gas passage in sequence into the intake passage, and then sucked into the cylinder and burned therein.
  • the cylinder head side opening of the communication passage opens in a tangential direction of the camshaft.
  • part of oil mist splashed up by the rotating camshaft in its tangential direction may enter the communication passage through the opening and reach the breather chamber.
  • the prior art is not necessarily sufficient to prevent oil mist from being mixed with blow-by gas.
  • baffle plate in the vicinity of the lower section of the opening of the communication passage to prevent oil mist from directly entering the opening. To do this, however, a space to additionally provide a baffle plate is needed in the cam chamber. This is not preferable because the engine may be increased in size for the baffle plate.
  • the present invention has been made in view of the above circumstances and it is, therefore, an object of examples of the present invention to allow blow-by gas existing between a cylinder head and a cylinder head cover to be sucked into an intake passage communicated to a cylinder and burned in the cylinder without mixing oil mist with the blow-by gas so that oil will not be uselessly consumed.
  • Another object of examples of the present invention is to accomplish the above abject without increasing the size of the engine.
  • the breather device in an engine of an aspect of the present invention which has been made to seek accomplish the above objects, is constituted as follows.
  • the reference numerals attached to the terms in this section should not be taken as limiting the technical scope of the present invention within the content of the described embodiments of the invention, or limiting in any other way.
  • a breather device in an engine comprising: a cylinder head 7; a cylinder head cover 9 attached to an upper side of the cylinder head 7 to form a cam chamber 8 in conjunction with the cylinder head 7; camshafts 14 and 15 disposed in the cam chamber 8 and supported on an upper side of the cylinder head 7 for rotation R about axes 11 and 12, respectively, extending generally horizontally; a partition plate 40 attached to a lower side of the cylinder head cover 9 to form a breather chamber 39 in conjunction with the cylinder head cover 9; a communication passage 41 formed through the partition plate 40 for communicating the side of the cylinder head 7 and the breather chamber 39 to each other; and a gas passage 42 for communicating an intake passage 30 communicated to a cylinder 6 and the breather chamber 39 to each other, wherein the communication passage 41 has a lower opening 49 on the side of the cylinder head 7 which opens in a direction along the axes of the camshafts 14 and 15.
  • the communication passage 41 has a bottom surface extending obliquely downward from the side of the breather chamber 39 to a lower edge of the lower opening 49.
  • the lower opening 49 is overlapped with the rotation locus 52 of cam noses 18 of the camshafts 14 and 15 as viewed in a direction along the axes 11 and 12 of the camshafts 14 and 15 (see Fig. 6 ).
  • the partition plate 40 has a main partition plate 46 attached to a lower side of the cylinder head cover 9, and a baffle plate 48 attached to the main partition plate 46 in an overlapping manner and that the communication passage 41 is formed between the main partition plate 46 and the baffle plate 48 and has an upper opening 50 on the side of the breather chamber 39 which is formed through the part of the main partition plate 46 above the baffle plate 48.
  • the lower sides of opening edges of the upper opening 50 and the upper side of the baffle plate 48 are separated from each other to form a space 53 therebetween.
  • the upper sides of opening edges of the upper opening 50 are gradually tilted downward from the region horizontally surrounding the upper opening 50 to the upper opening 50.
  • the device further comprise a pair of first and second vertical plates 58 and 59 extending vertically and located at positions separated from each other for partitioning the breather chamber 39 into a space 56 on the side of the communication passage 41 and a space 57 on the side of the gas passage 42, the first vertical plate 58 protruded upward from the partition plate 40 and the second vertical plate 59 protruded downward from a ceiling surface of the cylinder head cover 9.
  • the device further comprises a drain hole 60 formed through the part of the partition plate 40 under a space between the first and second vertical plates 58 and 59 and extending to the side of the cylinder head 7.
  • the first vertical plate 58 protruded upward from the partition plate 40 has a notch 61 formed at a lower end of a side thereof.
  • a broad aspect of the invention provides apparatus for returning blow-by gas from a cam chamber to a cylinder in an engine, the apparatus being adapted to reduce the amount of lubricant returned to the cylinder with the blow-by gas.
  • the apparatus comprises a communication passage, the arrangement being such that the lubricant is substantially prevented from entering the communication passage.
  • the apparatus includes a communication passage having a lower surface which is configured such that lubricant deposited on the lower surface is returned to the cylinder head side in the cam chamber.
  • a further broad aspect of the invention provides a breather device for an engine, the device comprising a breather chamber and a communication passage for connecting a cylinder head of the engine and the breather chamber, wherein the communication passage has a lower opening on the side of the cylinder head, the arrangement being such that the lower opening opens in a direction along the axis of a camshaft of the engine.
  • the engine 1 has an engine body 2 supported by a vehicle body.
  • the engine body 2 has a crankcase 5 for supporting a crankshaft 4 for rotation about an axis 3 extending generally horizontally, cylinders 6 extending upward from the crankcase 5, a cylinder head 7 attached to an upper side of the cylinders 6, a cylinder head cover 9 attached to an upper side of the cylinder head 7 to form a cam chamber 8 in conjunction with the cylinder head 7, and a valve mechanism 10 housed in the cam chamber 8.
  • the valve mechanism 10 is lubricated by oil stored in the cam chamber 8 and oil supplied by a separately provided oil pump.
  • the valve mechanism 10 has intake and exhaust camshafts 14 and 15 disposed in the cam chamber 8 and supported on an upper side of the cylinder head 7 by bearings 13 for rotation indicated by R about axes 11 and 12, respectively, extending parallel to the axis 3 of the crankshaft 4, and chain entraining means 16 for operatively connecting the camshafts 14 and 15 with the crankshaft 4.
  • Each of the camshafts 14 and 15 has a shaft member 17 supported by the bearing 13 and cam noses 18 formed integrally with the shaft member 17.
  • Designated by reference numeral 19 is a spark plug.
  • the engine 1 has an intake system member 23 disposed on one side of the engine body 2 and connected to one side of the cylinder head 7 and an exhaust system member 24 disposed on the other side of the engine body 2 and connected to the other side of the cylinder head 7.
  • the intake system member 23 has an intake manifold 26 extending from the cylinder head 7, a surge tank 27 connected to the extending end of the intake manifold 26, an intake pipe 28 extending from the surge tank 27, and a throttle valve 29 interposed in the intake pipe 28 at a position intermediate the length thereof.
  • the inside of the intake system member 23 constitutes an intake passage 30 for communicating the atmosphere side to the cylinders 6 via an air cleaner (not shown).
  • the engine 1 is provided with a breather device 37.
  • the breather device 37 returns blow-by gas 33 having reached the cam chamber 8 from the crankcase 5 and the cylinders 6 as a result of operation of the engine 1 into the cylinders 6 for combustion.
  • the breather device 37 has a metal partition plate 40 attached to a lower side of the cylinder head 7 by fixing members 38 to form a breather chamber 39 in conjunction with the cylinder head 7, a communication passage 41 formed through the partition plate 40 for communicating the cylinder head 7 side and the breather chamber 39 in the cam chamber 8 to each other, and a gas passage 42 for communicating the intake passage 30 of the intake system member 23 communicated to the cylinders 6 and the breather chamber 39 to each other.
  • the axial direction of the camshafts 14 and 15 is herein defined as longitudinal direction and the left-hand side of Fig. 3 and Fig. 4 (indicated by the arrow Fr) is herein defined as front side.
  • the breather chambers 39, the partition plates 40, the communication passages 41, and the gas passages 42 comprise a pair of first and second breather chambers 39a and 39b, a pair of first and second partition plates 40a and 40b, a pair of first and second communication passages 41a and 41b, and a pair of first and second gas passages 42a and 42b, respectively, on the left and right.
  • the first breather chamber 39a, the first partition plate 40a, the first communication passage 41a and the first gas passage 42a are located above the intake camshaft 14, and the second breather chamber 39b, the second partition plate 40b, the second communication passage 41b and the second gas passage 42b are located above the exhaust camshaft 15.
  • the first communication passage 41a is formed through one side end portion (which will be hereinafter referred to as "rear end portion") of the first partition plate 40a and the second communication passage 41b is formed through the other side end portion (which will be hereinafter referred to as "front end portion") of the second partition plate 40b
  • the first gas passage 42a communicates the other side end of the first breather chamber 39a and the intake passage 30 in the intake pipe 28 upstream of the throttle valve 29 to each other.
  • the second gas passage 42b communicates the one side end of the second breather chamber 39b and the intake passage 30 in the surge tank 27 downstream of the throttle valve 29 to each other.
  • a one-way valve 43 which allows gas flow from the second breather chamber 39b to the intake passage 30 only is interposed in the second gas passage 42b at a position intermediate the length thereof.
  • the partition plate 40 has a main partition plate 46 extending generally horizontally and attached to a lower side of the cylinder head 7 by fixing members 38 and a baffle plate 48 attached to a lower side of the main partition plate 46 by securing means 47 in an overlapping manner and protruded downward from the main partition plate 46.
  • the baffle plate 48 is of U-shaped cross-section as viewed in a direction along the axes of the camshafts 14 and 15 (see, in particular, Fig. 6 ). An upper end portion of the peripheral edges of the baffle plate 48 is joined to the lower side of the main partition plate 46 and secured thereto.
  • the securing means 47 which is by means of spot welding in the example shown in the drawing, may be a fastening member or a rivet.
  • the main partition plate 46 and the baffle plate 48 may be integrally formed by pressing a metal plate material.
  • the communication passage 41 has a lower opening 49 as the cylinder head 7 side end formed among the lower side of the main partition plate 46 and the peripheral edges of the baffle plate 48, and an upper opening 50 as the breather chamber 39 side end, which is located entirely at the part of the main partition plate 46 above the baffle plate 48.
  • the lower opening 49 and the upper opening 50 which have rectangular shapes, may have circular shapes.
  • the lower opening 49 opens in a direction along the axes of the camshafts 14 and 15.
  • the communication passage 41 has a bottom surface which linearly extends obliquely downward from the breather chamber 39 side to the lower edge of the lower opening 49 at a descending angle of about 15 to 30°.
  • the baffle plate 48 of the partition plate 40 is located above the cam noses 18.
  • the minimum gap between the rotation locus 52 of the cam noses 18 and the lower side of the baffle plate 48 in the vertical direction is about 5 mm.
  • the lower opening 49 is overlapped with the locus 52 of the cam noses 18.
  • the downward protruded end of the baffle plate 48 is located in the vicinity of the shaft member 17.
  • the lower sides of the edges of the upper opening 50 and the upper side of the baffle plate 48 are vertically separated to form a space 53 with a thickness of at least a few mm therebetween.
  • the upper sides of the edges of the upper opening 50 are gradually tilted downward from the region horizontally surrounding the upper opening 50 to the upper opening 50 at an angle of about 5 to 20°.
  • a pair of first and second vertical plates 58 and 59 extend generally vertically and are opposed to each other at longitudinally spaced positions to form a space 56 on the side of the communication passage 41 and a space 57 on the side of the gas passage 42.
  • the first vertical plate 58 is made of a metal plate and protruded upward from the partition plate 40 with its lower end secured to the main partition plate 46 of the partition plate 40 by spot welding.
  • a gas passage is formed between the ceiling surface of the cylinder head cover 9 and the protruded end of the first vertical plate 58.
  • the second vertical plate 59 is protruded downward integrally from the ceiling surface of the cylinder head cover 9.
  • a gas passage is formed between the upper surface of the main partition plate 46 of the partition plate 40 and the protruded end of the second vertical plate 59.
  • the second vertical plate 59 may be separate from the cylinder head cover 9.
  • the first vertical plate 58 is located on the side of the first communication passage 41a and the second vertical plate 59 is located on the side of the first gas passage 42a.
  • the first vertical plate 58 is located on the side of the second gas passage 42b and the vertical plate 59 is located on the side of the second communication passage 41b.
  • a drain hole 60 extending vertically to the side of the cylinder head 7 is formed through the part of the main partition plate 46 of the partition plate 40 under the space between the first and second vertical plates 58 and 59.
  • the first vertical plate 58 has notches 61 on both sides of the lower end thereof.
  • the opening of the throttle valve 29 is increased to supply a large amount of air-fuel mixture 35 into the cylinders 6 while the engine 1 is being driven, the engine 1 is rotated at a high speed and the negative pressure is increased in the intake passage 30 upstream and downstream of the throttle valve 29 in the intake system member 23. Then, by the negative pressure, the blow-by gas 33 on the side of the cylinder head 7 in the cam chamber 8 is sucked through the communication passage 41, the breather chamber 39 and the gas passage 42 in sequence into the intake passage 30 as indicated by solid line arrows. The blow-by gas 33 is then sucked into the cylinders 6 together with the air-fuel mixture 35 and burned therein.
  • the engine 1 When the opening of the throttle valve 29 is decreased to reduce the amount of the air-fuel mixture 35 to be supplied into the cylinders 6, the engine 1 is rotated at a low speed and the negative pressure is decreased in the intake passage 30 upstream of the throttle valve 29 in the intake system member 23.
  • the negative pressure in the intake passage 30 in the surge tank 27 downstream of the throttle valve 29 is maintained at a high level since the opening of the throttle valve 29 is decreased.
  • the lower opening 49 of the communication passage 41 on the side of the cylinder head 7 opens in a direction along the axes of the camshafts 14 and 15 as shown, in particular, in Fig. 1 and Fig. 7 .
  • the blow-by gas 33 existing on the side of the cylinder head 7 in the cam chamber 8 is sucked through the communication passage 41 into the breather chamber 39 by the negative pressure in the intake passage 30. Then, the blow-by gas 33 is sucked through the gas passage 42 and the intake passage 30 into the cylinders 6 and burned therein.
  • the bottom surface of the communication passage 41 extends obliquely downward from the side of the breather chamber 39 to the lower edges of the lower opening 49.
  • the lower opening 49 is overlapped with the rotation locus 52 of the cam noses 18 of the camshafts 14 and 15 as viewed in a direction along the axes 11 and 12 of the camshafts 14 and 15.
  • the partition plate 40 has the main partition plate 46 attached to the lower side of the cylinder head cover 9 and the baffle plate 48 attached to the main partition plate 46 in an overlapping manner, and the communication passage 41 is formed between the main partition plate 46 and the baffle plate 48 and has the lower opening 49 formed among the lower side of the main partition plate 46 and the peripheral edges of the baffle plate 48 and the upper opening 50 at the breather chamber 39 side end of the communication passage 41 formed through the part of the main partition plate 46 above the baffle plate 48.
  • the baffle plate 48 prevents oil mist splashed up by the camshafts 14 and 15 in their tangential directions from directly reaching the breather chamber 39 through the upper opening 50.
  • the baffle plate 48 is located above the cam noses 18 of the camshafts 14 and 15.
  • the lower sides of the edges of the upper opening 50 and the upper side of the baffle plate 48 are separated to form the space 53 therebetween.
  • the upper sides of the edges of the upper opening 50 are gradually tilted downward from the region horizontally surrounding the upper opening 50 to the upper opening 50.
  • the paired first and second vertical plates 58 and 59 extend vertically to form the space 56 on the side of the communication passage 41 and the space 57 on the side of the gas passage 42 and are located at positions separated from each other.
  • the first vertical plate 58 is protruded upward from the partition plate 40, and the second vertical plate 59 is protruded downward from the ceiling surface of the cylinder head cover 9.
  • oil mist passes through the communication passage 41 and reaches the space 56 on the side of the communication passage 41 in the breather chamber 39 together with the blow-by gas 33, and then flows into the space 57 on the side of the gas passage 42.
  • the oil mist is guided by the first vertical plate 58 and the second vertical plate 59 together with the blow-by gas 33 and its flowing direction is changed from upward to downward.
  • the oil mist adheres to the inner surfaces of the breather chamber 39 or the surfaces of the first and second vertical plates 58 and 59 by inertial force and is prevented from traveling to the intake passage 30 together with the blow-by gas 33.
  • the drain hole 60 extending to the cylinder head 7 side is formed through the part of the partition plate 40 under the space between the first and second vertical plates 58 and 59.
  • the notches 61 are formed in both sides of the lower end of the first vertical plate 58 protruded upward from the partition plate 40.
  • the oil can flow into the drain hole 60 smoothly through the notch 61 without being blocked by the first vertical plate 58 and is returned to the cylinder head 7 side in the cam chamber 8 through the drain hole 60.
  • the one-way valve 43 and the second gas passage 42b can be omitted.
  • the breather chamber 39 may be communicated to the intake passage 30 downstream of the throttle valve 29 such as the intake passage in the surge tank 27 by the first gas passage 42a.
  • An aspect of the present invention provides a breather device in an engine comprising: a cylinder head; a cylinder head cover attached to an upper side of the cylinder head to form a cam chamber in conjunction with the cylinder head; camshafts disposed in the cam chamber and supported on an upper side of the cylinder head for rotation about axes, respectively, extending generally horizontally; a partition plate attached to a lower side of the cylinder head cover to form a breather chamber in conjunction with the cylinder head cover; a communication passage formed through the partition plate for communicating the side of the cylinder head and the breather chamber to each other; and a gas passage for communicating an intake passage communicated to a cylinder and the breather chamber to each other, wherein the communication passage has a lower opening on the side of the cylinder head which opens in a direction along the axes of the camshafts.
  • the blow-by gas existing on the side of the cylinder head in the cam chamber is sucked through the communication passage into the breather chamber by the negative pressure in the intake passage. Then, the blow-by gas is sucked through the gas passage and the intake passage into the cylinders and burned therein.
  • the lower opening of the communication passage opens in a direction along the axes of the camshafts.
  • oil mist splashed up by the camshafts is prevented from entering the lower opening of the communication passage. Namely, the oil mist is prevented from being mixed with the blow-by gas directed to the breather chamber through the communication passage, so that the oil mist is prevented from being sucked together with the blow-by gas into the cylinders and burned therein. As a result, useless consumption of oil can be prevented.
  • the communication passage has a bottom surface extending obliquely downward from the side of the breather chamber to a lower edge of the lower opening.
  • the oil mist is prevented from reaching the breather chamber. Namely, the oil mist is prevented from being sucked into the cylinders through the breather chamber together with the blow-by gas, and useless consumption of oil can be prevented.
  • the lower opening is overlapped with the rotation locus of cam noses of the camshafts as viewed in a direction along the axes of the camshafts.
  • the partition plate has a main partition plate attached to a lower side of the cylinder head cover, and a baffle plate attached to the main partition plate in an overlapping manner, and the communication passage is formed between the main partition plate and the baffle plate and has an upper opening on the side of the breather chamber which is formed through the part of the main partition plate above the baffle plate.
  • the baffle plate prevents oil mist splashed up by the camshafts in their tangential directions from directly reaching the breather chamber through the upper opening.
  • the lower sides of opening edges of the upper opening and the upper side of the baffle plate are separated from each other to form a space therebetween.
  • the upper sides of opening edges of the upper opening are gradually tilted downward from the region horizontally surrounding the upper opening to the upper opening.
  • the device further comprises a pair of first and second vertical plates extending vertically and located at positions separated from each other for partitioning the breather chamber into a space on the side of the communication passage and a space on the side of the gas passage, the first vertical plate protruded upward from the partition plate and the second vertical plate protruded downward from a ceiling surface of the cylinder head cover.
  • oil mist passes through the communication passage and reaches the space on the side of the communication passage in the breather chamber together with the blow -by gas, and then flows into the space on the side of the gas passage.
  • the oil mist is guided by the first vertical plate and the second vertical plate together with the blow-by gas and its flowing direction is changed from upward to downward.
  • the oil mist adheres to the inner surfaces of the breather chamber or the surfaces of the first and second vertical plates by inertial force and is prevented from traveling to the intake passage together with the blow-by gas.
  • the device further comprises a drain hole formed through the part of the partition plate under a space between the first and second vertical plates and extending to the side of the cylinder head.
  • the first vertical plate protruded upward from the partition plate has a notch formed at a lower end of a side thereof.
  • the oil can flow into the drain hole smoothly through the notch without being blocked by the first vertical plate and is returned to the cylinder head side in the cam chamber through the drain hole.
  • an engine 1 comprises: a cylinder head 7; a cylinder head cover 9 attached to an upper side of the cylinder head 7 to form a cam chamber 8 in conjunction with the cylinder head 7; a camshaft 14 disposed in the cam chamber 8 and supported on an upper side of the cylinder head 7 for rotation R about an axis 11 extending generally horizontally; a partition plate 40 attached to a lower side of the cylinder head cover 9 to form a breather chamber 39 in conjunction with the cylinder head cover 9; a communication passage 41 formed through the partition plate 40 for communicating the side of the cylinder head 7 and the breather chamber 39 to each other; and a gas passage 42 for communicating an intake passage 30 communicated to a cylinder 6 and the breather chamber 39 to each other.
  • the communication passage 41 has a lower opening 49 on the side of the cylinder head 7 which opens in a direction along the axis of the camshaft 14.
  • Such an arrangement can allow blow-by gas existing between a cylinder head and a cylinder head cover to be sucked into an intake passage communicated to a cylinder and burned in the cylinder without mixing oil mist with the blow-by gas so that oil will not be uselessly consumed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)

Claims (9)

  1. Entlüftungsvorrichtung (37) für einen Motor mit
    einem Zylinderkopf (7);
    einer Zylinderkopfhaube (9), die an einer Oberseite des Zylinderkopfes (7) angebracht ist, um eine Nockenkammer (8) in Verbindung mit dem Zylinderkopf (7) zu bilden;
    einer Kurbelwelle (14, 15), die in der Nockenkammer (8) angeordnet und an einer Oberseite des Zylinderkopfes zwecks Drehung um eine sich im Großen und Ganzen horizontal erstreckende Achse (11, 12) abgestützt ist;
    einer Trennplatte (40), die an einer Unterseite der Zylinderkopfhaube (9) angebracht ist, um eine Entlüftungskammer (39) in Verbindung mit der Zylinderkopfhaube (9) zu bilden;
    einem Verbindungsgang (41), der durch die Trennplatte (40) hindurch gebildet ist, um die Seite des Zylinderkopfes (7) und die Entlüftungskammer (39) miteinander zu verbinden; und
    einem Gasdurchgang (42) zum Verbinden eines mit einem Zylinder (6) verbundenen Einlasskanals (30) mit der Entlüftungskammer (39),
    dadurch gekennzeichnet, dass der Verbindungsgang (41) eine untere Öffnung (49) auf der Seite des Zylinderkopfes (7) hat, die sich in einer Richtung entlang der Achse der Nockenwelle (14, 15) öffnet.
  2. Entlüftungsvorrichtung (37) in einem Motor nach Anspruch 1, bei der der Verbindungsgang (41) eine untere Fläche hat, die sich schräg nach unten von der Seite der Entlüftungskammer aus zu einer unteren Kante der unteren Öffnung erstreckt.
  3. Entlüftungsvorrichtung in einem Motor nach Anspruch 1 oder 2, bei der die untere Öffnung (49) mit der Rotationsbahnkurve (52) einer Nockennase (18) der Nockenwelle (14, 15) bei einer Blickrichtung entlang der Achse (11, 12) der Nockenwelle (14, 15) überlappt ist.
  4. Entlüftungsvorrichtung (37) in einem Motor nach irgend einem der Ansprüche 1 bis 3, bei der die Trennplatte (40) eine Haupttrennplatte (46), die an einer Unterseite der Zylinderkopfhaube (9) angebracht ist, und eine Ablenkplatte (48) hat, die an der Haupttrennplatte (40) mit Überlappung angebracht ist, und bei der der Verbindungsgang (41) zwischen der Haupttrennplatte (46) und der Ablenkplatte (48) gebildet ist und eine obere Öffnung (50) auf der Seite der Entlüftungskammer (39) hat, die durch den Teil der Haupttrennplatte (46) über der Ablenkplatte (48) hindurch gebildet ist.
  5. Entlüftungsvorrichtung (37) in einem Motor nach Anspruch 4, bei der die unteren Seiten der Öffnungskanten der oberen Öffnung (50) und die Oberseite der Ablenkplatte (48) voneinander getrennt sind, um einen Raum (53) dazwischen zu bilden.
  6. Entlüftungsvorrichtung (37) in einem Motor nach Anspruch 5, bei der die oberen Seiten der Öffnungskanten der oberen Öffnung (50) sanft nach unten von dem die obere Öffnung (50) horizontal umgebenden Bereich bis zu der oberen Öffnung (50) geneigt sind.
  7. Entlüftungsvorrichtung (37) in einem Motor nach irgend einem der Ansprüche 1 bis 6, ferner mit einem Paar erster (58) und zweiter (59) vertikaler Platten, die sich im Wesentlichen vertikal erstrecken und an voneinander getrennten Stellen angeordnet sind, um die Entlüftungskammer (38) in einen Raum (53) auf der Seite des Verbindungsganges (41) und einen Raum (53) auf der Seite des Gasdurchganges (42) zu teilen, wobei die erste vertikale Platte (58) nach oben von der Trennplatte (40) vorsteht und die zweite vertikale Platte (59) nach unten von einer Deckenfläche der Zylinderkopfhaube (9) vorsteht.
  8. Entlüftungsvorrichtung (37) in einem Motor nach Anspruch 7, ferner mit einem Abflussloch (60), das durch den Teil der Trennplatte (40) unter einem Raum (53) zwischen der ersten (58) und der zweiten (59) vertikalen Platte gebildet ist und sich zu der Seite des Zylinderkopfes (7) erstreckt.
  9. Entlüftungsvorrichtung (37) in einem Motor nach Anspruch 8, bei der die erste vertikale Platte (58), die von der Trennplatte (46) nach oben vorsteht, eine Kerbe (61) hat, die an einem unteren Ende einer Seite von ihr gebildet ist.
EP04253174A 2003-05-28 2004-05-28 Entlüftungsvorrichtung für eine Brennkraftmaschine Expired - Lifetime EP1482136B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003150309A JP2004353505A (ja) 2003-05-28 2003-05-28 エンジンにおけるブリーザ装置
JP2003150309 2003-05-28

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EP1482136A1 EP1482136A1 (de) 2004-12-01
EP1482136B1 true EP1482136B1 (de) 2012-03-28

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JP (1) JP2004353505A (de)
CN (1) CN100451302C (de)
GB (1) GB2402435B (de)
MY (1) MY136461A (de)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4661733B2 (ja) * 2006-08-22 2011-03-30 マツダ株式会社 エンジンのオイルセパレータ装置
US8011338B2 (en) 2008-09-11 2011-09-06 Ford Global Technologies, Llc Camcover oil separator
JP5330050B2 (ja) * 2009-03-26 2013-10-30 本田技研工業株式会社 ４ストロークサイクル内燃機関
JP5032641B2 (ja) * 2010-09-06 2012-09-26 本田技研工業株式会社 車両用エンジン
JP5613594B2 (ja) * 2011-03-03 2014-10-29 株式会社クボタ 頭上カム式エンジン
JP5740290B2 (ja) * 2011-11-25 2015-06-24 本田技研工業株式会社 内燃機関の油路構造
JP5994362B2 (ja) * 2012-04-27 2016-09-21 トヨタ自動車株式会社 エンジンのオイル分離装置
CN104594975B (zh) * 2014-12-05 2017-12-26 重庆龙卓机械制造有限责任公司 水平轴立式汽油机单向呼吸系统
CN104594974B (zh) * 2014-12-05 2018-06-12 重庆龙卓机械制造有限责任公司 水平轴立式汽油机
JP6412425B2 (ja) * 2014-12-18 2018-10-24 株式会社マーレ フィルターシステムズ 内燃機関のオイルセパレータの入口構造
CN114991986B (zh) * 2021-03-01 2024-05-07 比亚迪股份有限公司 气缸盖罩以及发动机
JP2023135844A (ja) * 2022-03-16 2023-09-29 本田技研工業株式会社 内燃機関のブリーザ構造

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59167906U (ja) * 1983-04-26 1984-11-10 愛知機械工業株式会社 内燃機関ロツカ−カバ−の油分離装置
JPS6179813A (ja) * 1984-09-26 1986-04-23 Toyota Motor Corp ブロ−バイガスのオイル分離装置
JPS61186716U (de) * 1985-05-15 1986-11-21
DE3713210A1 (de) * 1987-04-18 1988-11-03 Porsche Ag Entlueftungsvorrichtung mit integriertem oelabscheider
JPH01157216U (de) * 1988-04-21 1989-10-30
US5129371A (en) * 1991-09-03 1992-07-14 Saturn Corporation Cam cover oil separator for crankcase ventilation
JP3137397B2 (ja) * 1991-12-24 2001-02-19 マツダ株式会社 ブローバイガス還元装置のオイルセパレータ
JP3283687B2 (ja) * 1994-02-28 2002-05-20 株式会社テネックス オイルミストセパレ−タ
GB9526349D0 (en) * 1995-12-22 1996-02-21 Rover Group Separation of oil fromair breather gases
JPH1026012A (ja) * 1996-07-10 1998-01-27 Hino Motors Ltd エンジンのオイルセパレータ
DE19700733C2 (de) * 1997-01-11 2001-11-22 Bayerische Motoren Werke Ag Kurbelgehäuse-Entlüftung durch die Zylinderkopfhaube mit integrierten Zusatzfunktionen
DE19715061C2 (de) * 1997-04-11 1999-01-21 Daimler Benz Ag Entlüftungsvorrichtung für ein Kurbelgehäuse einer Brennkraftmaschine
JP2000045749A (ja) * 1998-07-31 2000-02-15 Tennex Corp ブローバイガスにおけるオイルの分離装置
JP3917303B2 (ja) * 1998-09-14 2007-05-23 本田技研工業株式会社 ４サイクルエンジンのブリーザ構造
JP4119023B2 (ja) * 1998-11-25 2008-07-16 本田技研工業株式会社 エンジンにおけるブリーザ装置
JP3378234B2 (ja) 2000-10-25 2003-02-17 本田技研工業株式会社 内燃機関のブリーザ装置
US6443136B1 (en) * 2000-10-25 2002-09-03 Honda Giken Kogyo Kabushiki Kaisha Breather apparatus for an internal combustion engine
US6412478B1 (en) * 2001-01-02 2002-07-02 Generac Power Systems, Inc. Breather for internal combustion engine
DE10154669A1 (de) * 2001-11-07 2003-05-22 Porsche Ag Brennkraftmaschine mit mindestens zwei Zylinderbankreihen

Also Published As

Publication number Publication date
GB0412042D0 (en) 2004-06-30
GB2402435B (en) 2006-08-02
MY136461A (en) 2008-10-31
GB2402435A (en) 2004-12-08
CN100451302C (zh) 2009-01-14
EP1482136A1 (de) 2004-12-01
CN1573039A (zh) 2005-02-02
JP2004353505A (ja) 2004-12-16

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