EP0918154B1 - Culasse pour un moteur à combustion interne - Google Patents

Culasse pour un moteur à combustion interne Download PDF

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Publication number
EP0918154B1
EP0918154B1 EP98122007A EP98122007A EP0918154B1 EP 0918154 B1 EP0918154 B1 EP 0918154B1 EP 98122007 A EP98122007 A EP 98122007A EP 98122007 A EP98122007 A EP 98122007A EP 0918154 B1 EP0918154 B1 EP 0918154B1
Authority
EP
European Patent Office
Prior art keywords
cylinder head
camshaft
oil
bearing block
bearing
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
EP98122007A
Other languages
German (de)
English (en)
Other versions
EP0918154A3 (fr
EP0918154A2 (fr
Inventor
Masahiro c/o Yamaha Hatsudoki K. K. Uchida
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.)
Yamaha Motor Co Ltd
Original Assignee
Yamaha Motor Co Ltd
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 Yamaha Motor Co Ltd filed Critical Yamaha Motor Co Ltd
Publication of EP0918154A2 publication Critical patent/EP0918154A2/fr
Publication of EP0918154A3 publication Critical patent/EP0918154A3/fr
Application granted granted Critical
Publication of EP0918154B1 publication Critical patent/EP0918154B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/022—Chain drive
    • 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L1/053—Camshafts overhead type
    • 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/34403—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using helically teethed sleeve or gear moving axially between crankshaft and camshaft
    • F01L1/34406—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using helically teethed sleeve or gear moving axially between crankshaft and camshaft the helically teethed sleeve being located in the camshaft driving pulley
    • 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
    • F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
    • F01M9/10—Lubrication of valve gear or auxiliaries
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/26—Cylinder heads having cooling means
    • F02F1/36—Cylinder heads having cooling means for liquid cooling
    • F02F1/38—Cylinder heads having cooling means for liquid cooling the cylinder heads being of overhead valve type
    • 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L2001/0475—Hollow camshafts
    • 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L1/053—Camshafts overhead type
    • F01L2001/0537—Double overhead camshafts [DOHC]
    • 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/34423—Details relating to the hydraulic feeding circuit
    • F01L2001/34426—Oil control valves
    • F01L2001/34433—Location oil control valves
    • 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/34423—Details relating to the hydraulic feeding circuit
    • F01L2001/34436—Features or method for avoiding malfunction due to foreign matters in oil
    • F01L2001/3444—Oil filters
    • 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L2001/34486—Location and number of the means for changing the angular relationship
    • F01L2001/34496—Two phasers on different camshafts
    • 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
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/18—DOHC [Double overhead camshaft]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F2001/244—Arrangement of valve stems in cylinder heads
    • F02F2001/245—Arrangement of valve stems in cylinder heads the valve stems being orientated at an angle with the cylinder axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/006—Camshaft or pushrod housings
    • F02F2007/0063—Head bolts; Arrangements of cylinder head bolts

Definitions

  • the invention relates to a cylinder head for an internal combustion engine according to the preamble of independent claim 1.
  • the inner EGR rate is attempted to increase toward greater overlap by controlling the intake valves and the exhaust valves to reduce fuel consumption also to reduce the NOx emissions or by later closing the intake and exhaust valves to reduce the pumping losses and thus to reduce fuel consumption.
  • a camshaft 105 is mounted on a integrally formed on a cylinder head body 101 bearing web 101 a, which with oil paths 136, 137 for the supply of oil (control oil) from a control valve 150 to an adjustable valve timing control device and an oil path 138 for the oil supply (lubricating oil) of the other, the camshaft 105 bearing bearing webs is provided so that the bearing land 101 a wide, and an overhang of the variable valve control device 110 of a cylinder head bolt 109 is large, which leads to the problem that the Engine was getting longer and bigger.
  • the problem is that many time-consuming and costly machining operations are necessary for incorporation of the various complicated oil paths.
  • a hydraulic control device for rotating a camshaft of an internal combustion engine wherein the control device is arranged at one end of the camshaft.
  • a hydraulic body with oil paths for the control device between the control device and the camshaft is arranged, whereby the overall size of the internal combustion engine is increased.
  • a cylinder head of the type mentioned wherein at the end of the camshaft, an adjustable valve timing means is arranged, and a control valve of the variable valve timing means is provided on the bearing block, wherein the bearing block comprises all the control valve enclosing inlet / outlet oil paths.
  • the invention thereby causes each one end of the camshaft to be supported by the bearing block which is separate from the cylinder head, the block being mounted in the cylinder head so as to overlap the attachment member, for example a cap screw, in the cross-section, that the internal combustion engine , in the following also engine, with shorter length can be executed.
  • the attachment member for example a cap screw
  • the bearing block is preferably positioned with two pins in the cylinder head body, wherein the bearing block is attached to the cylinder head body together with a camshaft cap by means of a camshaft cap mounting bolt.
  • the uppermost part of the control valve is exposed protruding beyond the head cover and sealed all around with sealing means, then this allows easy wiring of the control valve from above the cylinder head cover.
  • the cylinder head body 1 according to FIG. 1 per cylinder has openings for two inlet valves and two exhaust valves, wherein in the middle of the area between these intake valve 2 and exhaust valve holes 3 spark plug holes 4 are formed. Furthermore, bearing portions 1 a and 1 b, which support an intake camshaft 5 or exhaust camshaft 6 shown in FIG. 2, are located on the upper side of the cylinder head 1 between the two intake valve bores and the two exhaust valve bores.
  • a bearing block 32 separate from the cylinder head 1 is mounted in such a manner that, viewed in cross section, the cap screw 9 (see FIG. 5), while at the upper side of the bearing block 32, bearing portions 32a, 32b (see Fig. 2 and Fig. 3) are formed to freely rotatably support the respective portions of the intake camshaft 5 and exhaust camshaft 6, respectively.
  • the intake camshaft 5 and the exhaust camshaft 6 are each freely rotatably supported by the bearing portions 32a, 32b formed in the block 32 at the end where they are provided with the variable valve timing controller 10, with their upper half being supported by one on the upper side is mounted by block 32 mounted camshaft cap 33, while the bearing block 32 by pins 34 (see Fig. 3 and 4) is positioned, which in the Holes 8 stuck, which are formed in the respective mounting surfaces 1 c of the cylinder head 1, wherein in FIG.
  • variable valve timing control apparatus 10 The following is an explanation of the internal structure of the variable valve timing control apparatus 10 with reference to FIG. 6.
  • the variable valve timing control apparatus 10 has a boss plate 13 screwed together with a cover 12 by a screw 11 to the end of the intake camshaft 5, a housing 14 rotatable with respect to the guide plate 13 being disposed on the outer circumference of this guide plate 13, and an outer circumference the innermost part of this housing 14 on its inner circumference a chain pinion (helical gear or toothed ring) 14a is integrally formed.
  • a helical gear 15a is formed at one end of the piston member 15; and this helical gear 15a is engaged with the helical gear (sprocket) 14a formed on a part of the inner periphery of the housing 14.
  • the piston member 15a is tensioned by an inserted between this and the guide plate 13 spring 16 to the outside.
  • an oil path 17 formed in the guide plate 13 and the intake camshaft 5 opens, wherein this oil path 17 communicates with an oil groove 32d, 33b formed in the bearing block 32 and the camshaft cap 33, and with an oil path 36 formed in the bearing block 32.
  • an oil path 18 formed of the guide plate 13 and intake camshaft 5 opens, this oil path 18 having an oil groove 5a formed on the outer circumference of the intake camshaft 5 and an oil path 37 (see FIG. Fig. 7) is in communication.
  • an oil path 5b is formed in the axial direction, and its portion corresponding to the journal is provided with a plurality of radially-disposed oil holes 5c.
  • the overlapping on the block 32 bearing journal portion of the intake camshaft 5 is provided at its entire outer periphery with a ⁇ lzu Adjustsnut 5d, at this ⁇ lzu Adjustsnut 38 formed in the bearing block 32 oil path 38 opens, said oil path 38 formed with the equally formed in the bearing block 32 oil passages 39, 40 communicates.
  • a flange portion 5e, 5f formed on the outer circumference of the intake camshaft 5 is received by the end face of the block 32, the bearing block 32 acting as a thrust bearing which receives the thrust force caused by the intake camshaft 5.
  • outlet-side adjustable valve timing 20 thus corresponds to the reference numeral 21, the screw 11, 22, the cover 12, 23, the guide plate 13, 24, the housing 14, 25, the piston member 15, 26, the spring 16, 27, 28 the Oil routes 17,18 and S1, S2 the oil chambers.
  • an oil path 6b is formed in the axial direction, and its portion corresponding to the journal is provided with a plurality of radiatingly arranged oil holes 6c.
  • the overlapping on the bearing block 32 bearing journal portion of the exhaust camshaft 6 is provided at its entire outer periphery with a ⁇ lzu Adjustsnut 6d, at this ⁇ lzu Adjustsnut 6d formed in the bearing block 32 oil path 48 opens, said oil path 48 formed with the equally formed in the bearing block 32 oil passages 39, 40 communicates.
  • a flange portion 6e, 6f formed on the outer circumference of the exhaust camshaft 6 is received by the end face of the bearing block 32, and the bearing block 32 functions as the thrust bearing which receives the thrust force caused by the exhaust camshaft 6.
  • an endless timing chain 41 is placed around the chain sprocket 14a, 24a formed integrally with the housing 14, 24 of the variable valve timing control device 10, 20 and a drive pinion not shown; and when the timing chain 41 is driven by a rotation transmitted from an unillustrated crankshaft sprocket to the drive sprocket, then the intake camshaft 5 and exhaust camshaft 6 are rotated by the rotation of the sprocket 14a, 24a, through which rotation the unillustrated intake valves and exhaust valves be opened and closed the appropriate timing to make the required gas exchange in all cylinders.
  • Control valves 50, 51 are vertically mounted on the bearing block 32 for controlling the oil supply to the inlet and outlet side adjustable valve timings 10, 51, wherein according to FIG. 3, an upper part of the individual control valves 50, 51 formed by a cylinder head cover 42, round Opening 42a project outwardly, being sealed around with a sealant 53. Since now the upper part of the individual control valves 50, 51 protrudes through the cylinder head cover 42 to the outside, can be wired to the control valves 50, 51 leading lines in a simple manner above the cylinder head cover 42.
  • the oil paths 43 are each formed vertically, wherein the oil paths 37 as shown in Fig. 7 with an outlet side of an oil pump 44 are in communication. Furthermore, the cylinder head 1 is provided on its upper side with round openings 1 d, which communicate with all oil passages 43, wherein in all round openings 1 d oil filter 45 are arranged, each oil filter 45 through the oppressive on him bearing block 32 in the round openings 1 d is held.
  • Fig. 8 shows another way of receiving the oil filter 45, wherein according to this figure at the bottom surface of the bearing block 32, a round opening 32 e is formed, wherein the oil filter 45 is received by the cavity, which from this round opening 32 e and the side formed of the cylinder head 1 round opening 1 d is formed, wherein the oil filter 45 can also be held by the pressing on him bearing block 32 in position.
  • the oil path 40 communicating with the round hole 1 d and the oil path 43 is formed in the vertical direction, and this oil path 40 communicates with the oil path 39 communicating with the two control valves 50, 51 in that, of the control valves 50, 51, the oil paths 36, 37 and the oil passages 46, 47 extend obliquely respectively toward the journal section 32, 32b.
  • the oil paths 38, 48 branch off from the oil path 39 in order to lead oil (lubricating oil) to the bearing journals 32 a, 32 b of the block 32.
  • Fig. 7, 52 is an oil path (return path), which returns the oil in the oil pan, not shown.
  • variable valve timing control device 10,20 The following is a functional explanation of the variable valve timing control device 10,20.
  • the oil pump 44 When the engine is started, however, the oil pump 44 is driven as shown in FIG. 7 of a part of its driving force, so that the standing at the outlet of the oil pump 44 under defined pressure oil through the formed in the cylinder head 1 oil path 42 and the oil filter 45 and the formed in the bearing block 32 oil path 40 into the oil path 39, a part of which from the oil passages 38, 48 of the oil grooves 5d, 6d of the intake-side and exhaust-side camshaft 5, 6 through the oil paths 5b, 6b of the intake-side and exhaust-side camshaft 5, 6 flows, wherein it lubricates the bearing journal area of the inlet and outlet side camshaft 5, 6 from the radially shaped oil holes 5c, 6c. The remainder of the oil flowing through the oil path 39 in the block 32 is directed into the control valves 50, 51.
  • control valves 50, 51 The function of the control valves 50, 51 is controlled by an unillustrated electronic engine control unit (ECU) corresponding to an operating condition of the internal combustion engine, so that by switching the supply of oil to the variable valve timing devices 10, 20, the oil to the oil chamber S1 and S2, respectively Valve timing 10, 20 supplied and so the timing for the opening / closing of the intake / exhaust valves is advanced or retarded.
  • ECU electronic engine control unit
  • the oil from the oil passages 36, 46 the Oil chambers S1 of the variable valve timings 10, 20 is supplied, or when it is supplied from the oil passages 37, 47 the oil chambers S2 of the variable valve timings 10, 20, then slides in the variable valve timings 10, 20, the piston member 15, 25 in the axial direction the guide plate 15a, 25a, so that the housing of the engaged in engagement with the helical gear 15a, 25a of this piston member 15, 25 helical gear (toothed ring) 14 a, 24 a relative to the guide plate 13, 23 and the intake / exhaust camshaft 5, 6 turns.
  • variable valve timing 10 20 as the housing 14, 24 rotates relative to the intake / exhaust camshafts 5, 6, the relative position of the cams on the intake / exhaust camshaft and the opening / closing timing of the cam changes Inlet / exhaust valves are advanced / retarded so that in the various operating ranges, increased intake valve overlap with exhaust valves intensifies internal EGR thereby reducing fuel consumption and NOx emission, or retarding the intake and exhaust valves depending on the operating range Compression stroke incurred pumping losses and thus the fuel consumption can be reduced.
  • bearing block 32 is positioned with two pins 34 in the cylinder head 1, wherein the block 32 together with the camshaft cap 33 by means of Camshaft cap screw 35 is screwed to the cylinder head 1, so that the bearing block 32 can be mounted exactly in the cylinder head body 1, without this would entail a significant increase in the number of parts.
  • control valves 50, 51 are mounted, and the oil paths 36-40, 46-48 including these control valves 50, 51 are formed in a block shape in the block 32, so that these oil paths 36-40, 46-48 are made simpler can be and accordingly reduce the number of operations for the processing of the cylinder head 1 and thus Häzeit- and cost.
  • the oil filters 45 are mounted in the cylinder head 1, which are held in position by the bearing block 32, so that a rational arrangement of these oil filters 45 is possible and the number of machining operations for the cylinder head 1 can be reduced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Claims (5)

  1. Culasse pour un moteur à combustion interne présentant :
    - un corps de base de culasse (1) ;
    - un arbre à cames (5, 6) ;
    - un organe de fixation (9) pour la fixation du corps de base de culasse (1) avec un bloc-cylindres, et
    - un logement d'arbre à cames, comprenant un capot d'arbre à cames (33), qui représente une partie supérieure du logement, et un bloc de palier (32), qui représente une partie inférieure du logement, le bloc de palier (32) étant conçu séparément du corps de base de culasse (1), étant placé sur le corps de base de culasse (1) et recouvrant l'organe de fixation (9) lorsqu'il est mis en place, vu en section,
    caractérisée en ce qu'un dispositif réglable de commande de temps de soupape (10, 20) est disposé sur l'extrémité de l'arbre à cames (5, 6) et une vanne de commande (50, 51) du dispositif réglable de commande de temps de soupape (10, 20) est prévue sur le bloc de palier (32), le bloc de palier (32) présentant toutes les voies d'huile (36-40, 46-48) incluant la vanne de commande (50, 51).
  2. Culasse selon la revendication 1, caractérisée en ce que le bloc de palier (32) est positionné avec de préférence deux goupilles (34) dans le corps de base de culasse (1), le bloc de palier (32) étant placé conjointement avec le capot d'arbre à cames (33) au moyen d' un boulon de fixation de capot d'arbre à cames (35) sur le corps de base de culasse (1).
  3. Culasse selon la revendication 1 ou 2, caractérisée en ce qu'une partie supérieure de la vanne de commande (50, 51) dépasse à travers un couvre-culasse (42) et est étanchéifiée tout autour avec un produit d'étanchéité.
  4. Culasse selon l'une quelconque des revendications 1 à 3, caractérisée en ce qu'un filtre à huile (45) est prévu dans au moins une voie d'huile (43), qui est réalisée dans le corps de base de culasse (1), et le filtre à huile est maintenu en position par le bloc de palier (32) appuyant sur le filtre.
  5. Culasse selon l'une quelconque des revendications 1 à 4, caractérisée en ce que le dispositif réglable de commande de temps de soupape (10, 20) avec la vanne de commande (50, 51) est prévu respectivement sur un arbre à cames d'entrée (5) et sur un arbre à cames de sortie (6).
EP98122007A 1997-11-19 1998-11-19 Culasse pour un moteur à combustion interne Expired - Lifetime EP0918154B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP318051/97 1997-11-19
JP31805197A JP3847428B2 (ja) 1997-11-19 1997-11-19 内燃エンジンのシリンダヘッド構造
JP31805197 1997-11-19

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Publication number Publication date
EP0918154A3 (fr) 2000-03-15
DE59813570D1 (de) 2006-07-06
JP3847428B2 (ja) 2006-11-22
EP0918154A2 (fr) 1999-05-26
US6035817A (en) 2000-03-14
JPH11148426A (ja) 1999-06-02

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