WO2006085640A1 - Structure de fixation de capteur pour moteur a combustion interne et capuchon de came - Google Patents

Structure de fixation de capteur pour moteur a combustion interne et capuchon de came Download PDF

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Publication number
WO2006085640A1
WO2006085640A1 PCT/JP2006/302423 JP2006302423W WO2006085640A1 WO 2006085640 A1 WO2006085640 A1 WO 2006085640A1 JP 2006302423 W JP2006302423 W JP 2006302423W WO 2006085640 A1 WO2006085640 A1 WO 2006085640A1
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WO
WIPO (PCT)
Prior art keywords
cylinder head
cam
cam cap
sensor
cap component
Prior art date
Application number
PCT/JP2006/302423
Other languages
English (en)
Inventor
Kazuya Yoshijima
Hiroki Morishita
Original Assignee
Toyota Jidosha Kabushiki Kaisha
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 Toyota Jidosha Kabushiki Kaisha filed Critical Toyota Jidosha Kabushiki Kaisha
Publication of WO2006085640A1 publication Critical patent/WO2006085640A1/fr

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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
    • F01L1/34—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
    • 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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L2001/0476—Camshaft bearings
    • 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
    • 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
    • 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/04—Sensors
    • F01L2820/041—Camshafts position or phase sensors

Definitions

  • the present invention relates to an attachment structure of sensors for an internal combustion engine such as cam angle sensors, and to a cam cap component to which function devices of an internal combustion engine such as sensors and oil control valves are attached.
  • An internal combustion engine equipped with a variable valve actuation mechanism needs to be provided with a cam angle sensor in the vicinity of a cam shaft to detect the state of the valve timing.
  • Techniques for installing cam angle sensors include the one in which a cam angle sensor is attached to a cylinder head cover, and a rotor is attached to a cam shaft to face the cam angle sensor (for example, refer to Japanese Patent No . 3551001) . The rotational phase of the rotor is detected by the cam angle sensor .
  • an obj ective of the present invention to provide an attachment structure for sensors used in an internal combustion engine, which' structure eliminates influence of vibrations and deformations of a cylinder head cover on detection performed by the sensors .
  • Another obj ective of the present invention is to provide a cam cap component that is capable of receiving function devices for internal combustion engines such as sensors and oil control valves and is applicable to the attachment structure .
  • an attachment structure of a sensor for an internal combustion engine is ' provided.
  • the engine has a component that is located between a cylinder head and a cylinder head cover of the engine while being covered by the cylinder head cover .
  • the sensor contacts or faces the component .
  • Part of the sensor is exposed from an opening formed in the cylinder head .
  • the attachment structure includes a receiving portion, a base, an oil seal member, and a fastening portion .
  • the sensor is detachably attached to the receiving portion through the opening .
  • the base is integrally formed with the receiving portion, and is fixed to the cylinder head to determine the position of the receiving portion relative to the cylinder head.
  • the oil seal member seals a space between an opening forming portion, which is a portion of the cylinder head cover that forms the opening, and the receiving portion, or a space between the opening forming portion and the sensor .
  • the fastening portion fastens the sensor to the receiving portion to maintain the attached state of the sensor to the receiving portion.
  • Fig . 1 is a top perspective view illustrating an attachment structure of a cam angle sensor according to a first embodiment
  • Fig. 3 is a front view illustrating the attachment structure of the cam angle sensor shown in Fig. 1;
  • Fig . 4 is a right side view illustrating the attachment structure of the cam angle sensor shown in Fig . 1 ;
  • Fig . 9B is a bottom view illustrating the cam cap component shown in Fig. 7 ;
  • Fig . 9C is a front view illustrating the cam cap component shown in Fig . 7 ;
  • Fig . 11 is a top perspective view from a different angle illustrating the attachment structure of the cam angle sensors and the OCVs shown in Fig . 10 ;
  • Fig . 12 is a front view illustrating the attachment structure of the cam angle sensors and the OCVs shown in Fig . 10 ;
  • Fig . 13 is a left side view illustrating the attachment structure of the cam angle sensors and the OCVs shown in Fig . 10 ;
  • Fig . 14 is a plan view illustrating the attachment structure of the cam angle sensors and the OCVs shown in Fig . 10 ;
  • Fig. 15 is a top perspective view illustrating a cam cap component according to a second embodiment;
  • Fig . 16 is a top perspective view from a different angle illustrating the cam cap component shown in Fig . 15 ;
  • Fig . 17 is a front view illustrating the cam cap component shown in Fig . 15 ;
  • Fig . 18 is a left side view illustrating the cam cap component shown in Fig . 15 ;
  • Fig . 23A is a front view illustrating an annular gasket according to a second embodiment
  • Fig . 23B is a rear view illustrating the annular gasket shown in Fig . 23A;
  • Fig . 23C is a right side view illustrating the annular gasket shown in Fig. 23A;
  • Fig . 23D is a right side longitudinal cross-sectional view illustrating the annular gasket shown in Fig . 23A;
  • Fig . 23F is a perspective view illustrating the annular gasket shown in Fig. 23A;
  • Fig . 24 is a top perspective view illustrating a cam cap component according to another embodiment ;
  • Fig . 26 is a top perspective view illustrating the cam cap component shown in Fig . 24 in use
  • Fig . 27 is a top perspective view illustrating the cam cap component shown in Fig. 24 in use
  • Figs . 1 to 7 illustrate an attachment structure of a sensor for an internal combustion engine to which the present invention is applied.
  • the sensor for the internal combustion engine is a cam angle sensor 2.
  • Fig . 1 is a top perspective view
  • Fig / 2 is a bottom perspective view
  • Fig . 3 is a front view
  • Fig . 4 is a right side view
  • Fig . 5 is a top cross-sectional perspective view
  • Fig . 6 is an exploded perspective view .
  • variable valve actuation mechanism 400 is actuated by controlling the amount of hydraulic oil supplied by an oil control valve (hereinafter, referred to as OCV) , and rotates the timing sprocket of the mechanism 400 relative to the intake camshaft 4. Accordingly, the difference between the rotational phase of the intake camshaft 4 and that of the crankshaft is changed, so that the valve timing' of the intake valve is adjusted .
  • OCV oil control valve
  • variable valve actuation mechanism 400 is provided for the intake valve, the cam angle sensor 2 provided for the intake camshaft 4 will be discussed below .
  • a cam angle sensor is also provided for the exhaust camshaft as in the description of the intake camshaft 4 below .
  • a cam cap component 8 is provided for supporting the cam angle sensor 2.
  • the intake camshaft 4 is rotatably supported between the cam cap component 8 and a cam j ournal 10 provided in a cylinder head (including a cam carrier) 30.
  • Figs . 7 to 9 (D) show the cam cap component 8.
  • Fig. 7 is a top perspective view
  • Fig . 8 is a bottom perspective view
  • Fig . 9A is a plan view
  • Fig . 9B is a bottom view
  • Fig . 9C is a front view
  • Fig . 9D is a right side view .
  • the cam cap component 8 includes a base 12 that functions as a cam cap for supporting the intake camshaft 4 , and a receiving portion 13 for receiving the cam angle sensor 2.
  • a threaded hole 14c is formed vertically in an upper surface 14b of the sleeve 14.
  • a body 2a of the cam angle sensor 2 is received by the receiving hole 14a .
  • the cam angle sensor 2 has a stay 2b, in which a through hole 2c is formed.
  • a screw 18 is inserted into the through hole 2c and screwed to the threaded hole 14c .
  • the entire cam angle sensor 2 is attached to the sleeve 14 of the cam cap component 8 with the body 2a facing vertically downward.
  • An 0-ring 3, which is an elastic rubber body, is provided on the outer circumference of the body 2a of the cam angle sensor 2.
  • the 0-ring 3 functions as oil seal between the body 2a of the cam angle sensor 2 and the receiving hole 14a .
  • the body 2a of the cam angle sensor 2 which is attached to the cam cap component 8 , is located in the vicinity of the rotor 6, which is attached to and rotates integrally with the intake camshaft 4.
  • the cam angle sensor 2 detects passage of the teeth 6a of the rotor 6, and outputs through a signal line 2d detection signals representing the passing timing to an electronic control circuit controlling the engine .
  • the upper surface 14b of the sleeve 14 of the cam cap component 8 is exposed from an opening 22 formed in a cylinder head cover 20.
  • An annular gasket 24 which is an elastic rubber body, is provided between the outer circumference of the sleeve 14 and the inner circumference of the opening 22.
  • the annular gasket 24 seals the space between the sleeve 14 and the cylinder head cover 20. Therefore, even if the dimensional accuracy of the cylinder head cover 20 is not high, or even if the cylinder head cover 20 is deformed when being attached to the cylinder head 30 , displacement caused by such a low dimensional accuracy and deformation is absorbed by the annular gasket 24 , which is flexed accordingly. Therefore, sufficient oil sealing performance is maintained.
  • the annular gasket 24 flexes to absorb displacement caused by the deformation . Sufficient oil sealing performance is therefore maintained. Also, even if the cylinder head cover 20 vibrates during the operation of the internal combustion engine, the vibration is absorbed by the annular gasket 24. Sufficient oil sealing performance is therefore maintained.
  • the receiving hole 14a and the threaded hole 14c of the sleeve 14 are completely exposed to the exterior of the cylinder head cover 20.
  • the cam angle sensor 2 is fitted in the receiving hole 14a of the sleeve 14 and then fixed with the screw 18 after installing the intake camshaft 4 to the cam j ournal 10 with the cam cap component 8 , and attaching the cylinder head cover 20 to the cylinder head 30.
  • the cam angle sensor 2 can be removed from the sleeve 14 by loosening the screw 18. In this manner, the cam angle sensor 2 can be inserted into and removed from the opening 22.
  • the rotor 6 corresponds to a component that is located between the cylinder head 30 and the cylinder head cover 20 while being covered with the cylinder head cover 20
  • the gasket 24 corresponds to an oil seal member
  • the stay 2b and the screw 18 correspond to a fastening portion
  • the threaded hole 14c corresponds to a coupler portion
  • the inner circumferential surface of the opening 22 corresponds to an opening forming portion of the cylinder head cover 20.
  • the first embodiment has the following advantages .
  • the receiving portion 13 and the base 12 of the cam cap component 8 which receives the cam angle sensor 2 , are molded firmly in one piece, and the base 12 is formed as a cam cap . Therefore, by fixing the base 12 of the cam cap component 8 to the cylinder head 30, or to the cam j ournal 10 of the cylinder head 30, the position of the receiving portion 13 on the cylinder head 30 is determined. Thus, the cam angle sensor 2 is not supported by the cylinder head cover 20 , but is firmly supported by the cylinder head 30 through the receiving portion 13 and the base 12.
  • the cam angle sensor 2 is capable of accurately detecting the cam angle without being influenced by vibrations and deformation of the cylinder head cover 20.
  • the cam angle sensor 2 and the rotor 6 can be arranged sufficiently close to each other . Since the cam angle sensor 2 and the rotor 6 are arranged close to each other, the cam angle sensor 2 is capable of accurately detecting the teeth 6a .
  • the sleeve 14 of the receiving portion 13 has the receiving hole 14a at the distal portion into which the cam angle sensor 2 can be inserted and removed. Also, the sleeve 14 has the threaded hole 14c at the distal portion . The receiving hole 14a and the threaded hole 14c are exposed to the exterior from the opening 22. Thus , after the cylinder head cover 20 is attached to the cylinder head 30 , the cam angle sensor 2 can be efficiently attached to and removed from the receiving portion 13.
  • the annular gasket 24 Since the upper surface of the annular gasket 24 is completely exposed to the exterior between the opening 22 of the cylinder head cover 20 and the sleeve 14 , the annular gasket 24 can be inserted into and removed from the outer side of the cylinder head cover 20. Therefore, after the cylinder head cover 20 is assembled, the annular gasket 24 can be easily installed or replaced without removing the cylinder head cover 20.
  • a cam cap component of this embodiment receives not only cam angle sensors but also OCVs that controls the supply of hydraulic oil to the variable valve actuation mechanisms . That is , as shown in Figs . 10 to 14 , a cam cap component 108 of this embodiment receives four function devices for an internal combustion engine, that is, two cam angle sensors 102 , 103 and two OCVs 104 , 105 for variable valve actuation mechanisms .
  • the cam cap component 108 is provided on a cam j ournal 109 of a cylinder head 40.
  • Figs . 15 to 20 show the cam cap component 108.
  • the positions of the cam cap component 108 in Figs . 15 to 19 correspond to those in Figs . 10 to 14. That is, Fig. 15 is a top perspective view illustrating a main portion, Fig . 16 is a top perspective view from a different angle after being pivoted about a vertical axis, Fig. 17 is a front view, Fig . 18 is a left side view, and Fig. 19 is a plan view .
  • Fig . 20 is a bottom perspective view.
  • the cam cap component 108 includes a base 120 that functions as cam caps for the intake camshaft 110 and the exhaust camshaft 112 , receiving portions 122 , 123 for receiving the cam angle sensor 102 , 103 , and receiving portions 124 , 125 for receiving OCVs .
  • the receiving portions 122 to 125 each have a sleeve 126, 127 , 128 , 129 having a receiving hole 126a, 127a, 128a, 129a .
  • the receiving holes 126a, 127a, 128a, 129a each have a shape corresponding to the outer shape of the associated one of the cam angle sensors 102, 103 and the OCVs 104 , 105.
  • the cam angle sensor receiving portion 123 and the OCV receiving portion 125 are combined. That is, the receiving portions 123 and 125 are integrated with the base 120 by means of a sleeve 127 for the cam angle sensor of the receiving portion 123, a sleeve 129 for the OCV of the receiving portion 125, and a connecting portion 132 common to the sleeves 127 , 129.
  • the cam angle sensor receiving portions 122 , 123 have the same structure as described in the first embodiment . That is, the cam angle sensor 102 , 103 received by the receiving holes 126a, 127a are installed by inserting the screws 102c, 103c into the through holes in the stays 102b, 103b, and screwing the screws 102c, 103c into the threaded holes 126b, 127b formed in the upper surface of the sleeves 126, 127. This permits the rotational phases of the rotors 114 , 116 provided for the camshafts 110, 112 to be detected. Accordingly, the valve timings of the valves are detected.
  • the sleeves 128 , 129 of the OCV receiving portions 124 , 125 are cylindrical, and the receiving openings of the receiving holes 128a, 129a are slightly inclined upward.
  • the receiving holes 128a, 129a are shaped to correspond to the outer shape of spool valve portions of the OCVs 104 , 105.
  • the cam cap component 108 includes oil passages that can communicate with the OCVs 104 , 105. Specifically, as shown by broken lines in Fig . 17 , in the cam cap component 108 , five oil passages 128b, 128c, 128d, 128e, 128f are provided to converge to the sleeve 128. Also, five oil passages 129b, 129c, 129d, 129e, 129f are formed to converge to the sleeve 129. The oil passages 128b to 128f are opened in the receiving hole 128a to correspond to five ports of the OCV 104.
  • the oil passages 129b to 129f are opened in the receiving hole 129a -to correspond to five ports of the OCV 105.
  • the oil passages 128b and 128c permit hydraulic oil to flow between the OCV 104 and the variable valve actuation mechanism 401
  • the oil passages 129b and 129c permit hydraulic oil to flow between the OCV 105 and the variable valve actuation mechanism 402.
  • the oil passage 128d is provided for supplying hydraulic oil to the OCV 104
  • the oil passage 129d is provided for supplying hydraulic oil to the OCV 105.
  • phase retarding oil passages 128b, 129b each supply hydraulic oil to phase retarding hydraulic chambers defined in the variable valve actuation mechanisms 401 , 402 attached to ends of the camshafts 110 , 112 through phase retarding oil passages 110a, 112a ( see Figs . 10, 12 ) axially formed in the camshafts 110, 112.
  • This configuration permits the rotational phases of the camshafts 110, 112 to be retarded.
  • phase advancing oil passages 128c, 129c each supply hydraulic oil to phase advancing hydraulic chambers defined in the variable valve actuation mechanisms 401, 402 through phase advancing oil passages 110b, 112b ( see Figs . 10 , 12 ) axially formed in the camshafts 110, 112.
  • This configuration permits the rotational phases of the camshafts 110 , 112 to be advanced.
  • the supplying oil passages 128d, 129d may be formed with pipes connected to the sleeves 128 , 129. Ends of these pipes may be directly connected to the hydraulic oil supplying passages formed in the cylinder head 40 , or to the base 120 to supply hydraulic oil from the hydraulic oil supplying connector 120a .
  • the draining oil passages 128e, 128f, 129e, 129f drain oil from the other set to the cylinder head cover 134. Therefore, the draining oil passages 128e, 128f, 129e, 129f extend through the walls of the sleeves 128 , 129 and have openings on the outer circumference of the sleeves 128 , 129.
  • the cam cap component 108 including the base 120
  • Figs . 23A to 23F illustrate the structure of the annular gasket 136.
  • Fig. 23A is a front view
  • Fig. 23B is a rear view
  • Fig . 23C is a right side view
  • Fig . 23D is a right side longitudinal cross-sectional view
  • Fig . 23E is a plan view
  • Fig . 23F is a perspective view .
  • the annular gasket 136 includes a metal ring 136a having an L-shaped cross-section, and a lip portion 136b, which is an elastic rubber body.
  • the lip portion 13 ⁇ b covers the metal ring 13 ⁇ a and extends in one axial direction to form a cylinder having a reducing diameter . As shown in Figs .
  • the metal rings 136a of the annular gaskets 136 are held and pressed against the cylinder head cover 134 by the flanges 104b, 105b of the OCVs 104 , 105. This causes the annular gaskets 136 to closely contact the cylinder head cover 134.
  • each spool valve portion is inserted into the opening 134a to which the annular gasket 136 is fitted. Then, the OCVs 104 , 105 are fastened to the sleeves 128 , 129 with the screws 138 , 140. Accordingly, the installment structure for the OCVs 104 , 105 is completed.
  • each of the cam angle sensors 102 , 103 a portion of the cylinder head cover 134 exposed through an opening is connected to an electronic control unit with signal lines . This permits the cam angle to be detected. Further, electromagnetic solenoid portions 104c, 105c of the OCVs 104 , 105 exposed to the outside from the openings 134a of the cylinder head cover 134 are connected to the electronic control unit with signal lines . Accordingly, using hydraulic oil supplied to the supplying oil passages 128d, 129d from the hydraulic oil supply passages in the cylinder head 40 , the variable valve actuation mechanisms 401, 402 are actuated so that the valve timings of the intake valves and the exhaust valves are adj usted according to the operating state of the internal combustion engine .
  • the second embodiment has the following advantages .
  • the cam angle sensors 102 , 103 have the same advantages as the first embodiment . Also, since the base 120 is formed as one piece consisting of connected cam caps for the intake camshaft 110 and the exhaust camshaft 112, the cam angle sensors 102 , 103 are firmly fixed to the cylinder head 40. Further, since the OCV receiving portions 124 , 125 are integrated, the cam cap component 108 has increased weight and rigidity. The cam cap component 108 is therefore less likely to influenced by vibration and deformation of the cylinder head cover 134 , and the detection accuracy of the cam angle signal is further improved .
  • annular gasket 136 Since the upper surface of the annular gasket 136 is completely exposed to the exterior between the openings 134a of cylinder head cover 134 and the sleeves 128 , 129, the annular gaskets 136 can be inserted into and removed from the outer side of the cylinder head cover 134. This structure permits the annular gaskets 136 to be easily installed or replaced without removing the cylinder head cover 134.
  • This configuration permits two camshafts 210 , 212 to be rotatably held between the cam cap component 208 and a cam j ournal 209 provided on the cylinder head 50 as shown in Fig . 25.
  • the annular gaskets 136 (Fig . 23 ) are installed as shown in Fig . 21.
  • the OCVs 204 , 205 are fixed to the receiving portions 224 , 225 with screws 238 , 240 to obtain an OCV attachment structure shown in Fig . 27.
  • This structure has the advantages related to OCVs presented in the second embodiment .
  • the orientation of the OCVs is perpendicular to the axial direction of the camshafts .
  • a structure shown in Fig. 28 may be employed.
  • the axial direction of receiving holes 324a, 325a of OCV receiving portions 324 , 325 of a cam cap component 308 extends along the axial direction of camshafts, so that the attachment direction of OCVs are matched with the axial direction of the camshafts .
  • the axial direction of the receiving holes is defined such that the distal ends of OCVs are inclined slightly downward.
  • the cam cap component may be configured such that the OCVs are completely parallel to the camshafts .
  • Each of the cam angle sensors in the illustrated embodiments faces a rotor and detects rotational phase .
  • the present invention may be applied to a sensor for an internal combustion engine that contacts a component that is located between a cylinder head and a cylinder head cover, thereby detecting rotational phase . In this case, the same advantages as those of the illustrated embodiments are obtained.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

L'invention concerne une structure de fixation de capteur pour moteur à combustion interne et un capuchon de came, comprenant une partie de réception (13) et une base (8) de capuchon de came moulés dans une seule pièce. La base (12) fait office de capuchon de came. Par conséquent, l'invention permet de positionner précisément un capteur (2) d'angle de came fixé à la partie de réception (13) par rapport à un rotor (6) fixé à un arbre à came d'admission (4). Les déformations et les vibrations d'un couvre-culasse (20), susceptibles d'être produites car le couvre-culasse (20) en résine, sont absorbées par un joint (24) situé entre une ouverture (22) du couvre-culasse (20) et un manchon (14). Les déformations et les vibrations ainsi absorbées n'influencent pas négativement la position du manchon (14) et du capteur (2) d'angle de came. Par conséquent, le capteur (2) d'angle de came peut détecter précisément l'angle de came sans être influencé par les vibrations et les déformations du couvre-culasse (20).
PCT/JP2006/302423 2005-02-10 2006-02-07 Structure de fixation de capteur pour moteur a combustion interne et capuchon de came WO2006085640A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005-034643 2005-02-10
JP2005034643A JP2006220073A (ja) 2005-02-10 2005-02-10 内燃機関用センサの取付構造及びカムキャップ構成体

Publications (1)

Publication Number Publication Date
WO2006085640A1 true WO2006085640A1 (fr) 2006-08-17

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PCT/JP2006/302423 WO2006085640A1 (fr) 2005-02-10 2006-02-07 Structure de fixation de capteur pour moteur a combustion interne et capuchon de came

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WO (1) WO2006085640A1 (fr)

Cited By (7)

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CN102066726A (zh) * 2008-06-23 2011-05-18 丰田自动车株式会社 内燃机的凸轮角度传感器的安装方法及装置
FR2990465A1 (fr) * 2012-05-14 2013-11-15 Valeo Sys Controle Moteur Sas Ensemble de levee multiple de soupape
FR2990464A1 (fr) * 2012-05-14 2013-11-15 Valeo Sys Controle Moteur Sas Platine de montage d'actionneurs d'un systeme de deconnexion de soupape
CN104234831A (zh) * 2014-06-25 2014-12-24 马勒技术投资(中国）有限公司 凸轮轴位置传感器安装方法
US9850848B2 (en) 2013-08-30 2017-12-26 Aisin Seiki Kabushiki Kaisha Sensor support structure for camshaft rotation sensor
US11168831B2 (en) 2017-11-15 2021-11-09 Toyota Jidosha Kabushiki Kaisha Attachment mechanism for electronic equipment for engine
US12091995B2 (en) * 2022-06-24 2024-09-17 Suzuki Motor Corporation Installation structure for oil control valve

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JP4197022B2 (ja) * 2006-08-31 2008-12-17 トヨタ自動車株式会社 カムキャップ
CN113236395B (zh) * 2021-05-19 2023-03-24 重庆长安汽车股份有限公司 一种可变气门升程系统的执行器安装结构

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102066726A (zh) * 2008-06-23 2011-05-18 丰田自动车株式会社 内燃机的凸轮角度传感器的安装方法及装置
US9068528B2 (en) 2008-06-23 2015-06-30 Toyota Jidosha Kabushiki Kaisha Method and device for mounting cam angle sensor for internal combustion engine
FR2990465A1 (fr) * 2012-05-14 2013-11-15 Valeo Sys Controle Moteur Sas Ensemble de levee multiple de soupape
FR2990464A1 (fr) * 2012-05-14 2013-11-15 Valeo Sys Controle Moteur Sas Platine de montage d'actionneurs d'un systeme de deconnexion de soupape
WO2013171392A1 (fr) * 2012-05-14 2013-11-21 Valeo Systemes De Controle Moteur Module de levée multiple de soupape et système d'actionnement comportant ce module
US9850848B2 (en) 2013-08-30 2017-12-26 Aisin Seiki Kabushiki Kaisha Sensor support structure for camshaft rotation sensor
CN104234831A (zh) * 2014-06-25 2014-12-24 马勒技术投资(中国）有限公司 凸轮轴位置传感器安装方法
US11168831B2 (en) 2017-11-15 2021-11-09 Toyota Jidosha Kabushiki Kaisha Attachment mechanism for electronic equipment for engine
US12091995B2 (en) * 2022-06-24 2024-09-17 Suzuki Motor Corporation Installation structure for oil control valve

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