WO2007074612A1 - Dispositif pour commander le moment d'ouverture et de fermeture d'une soupape - Google Patents

Dispositif pour commander le moment d'ouverture et de fermeture d'une soupape Download PDF

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Publication number
WO2007074612A1
WO2007074612A1 PCT/JP2006/324252 JP2006324252W WO2007074612A1 WO 2007074612 A1 WO2007074612 A1 WO 2007074612A1 JP 2006324252 W JP2006324252 W JP 2006324252W WO 2007074612 A1 WO2007074612 A1 WO 2007074612A1
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WO
WIPO (PCT)
Prior art keywords
fluid
valve
control device
chamber
timing control
Prior art date
Application number
PCT/JP2006/324252
Other languages
English (en)
Japanese (ja)
Inventor
Kazunari Adachi
Katsuhiko Eguchi
Eiji Miyachi
Kazumi Ogawa
Original Assignee
Aisin Seiki 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 Aisin Seiki Kabushiki Kaisha filed Critical Aisin Seiki Kabushiki Kaisha
Priority to JP2007551875A priority Critical patent/JP4721070B2/ja
Publication of WO2007074612A1 publication Critical patent/WO2007074612A1/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
    • 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
    • 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
    • F01L2001/028—Pre-assembled timing arrangement, e.g. located in a cassette
    • 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
    • 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
    • F01L2001/34446—Fluid accumulators for the feeding circuit
    • 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
    • F01L2820/03—Auxiliary actuators
    • F01L2820/032—Electric motors

Definitions

  • the present invention relates to a valve timing control device for controlling the opening and closing timing of a valve in an internal combustion engine.
  • a relative rotational phase of a drive side rotation member rotating in synchronization with a crankshaft and a driven side rotation member in synchronization with a camshaft is displaced.
  • a valve timing control device capable of appropriately adjusting the valve timing to achieve a suitable operating condition.
  • the valve opening / closing timing control device described in Patent Document 1 is formed by the drive side rotation member and the driven side rotation member, and is supplied with hydraulic fluid as a fluid, whereby the driven side rotation member for the drive side rotation member is supplied. And a phase advancing chamber that changes the relative rotational phase in the advancing direction.
  • the supply and discharge of hydraulic oil common to the engine oil to the advancing and retarding chambers is performed by the fluid supply and discharge means provided with a mechanical pump that utilizes the driving force of the crankshaft of the engine. That is, the valve opening / closing timing control device described in Patent Document 1 employs a hydraulic drive system in which the relative rotational phase is adjusted by the hydraulic pressure of the hydraulic fluid.
  • valve timing control device described in Patent Document 2 rotates the driven side rotation member using a mechanical link mechanism connected to an electric motor. Is configured. That is, the valve timing control device described in Patent Document 2 employs an electric drive system in which the relative rotational phase is adjusted by the power of the electric motor.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2003-314222
  • Patent Document 2 Japanese Patent Application Laid-Open No. 2005-48706
  • Adjustment of the relative rotational phase using a valve timing control device is required not only during engine operation but also at engine start. For example, when cold, it may be required to change the relative rotational phase to an advanced side so that engine startability improves.
  • a high-power electric pump that can discharge high-viscosity hydraulic oil in cold operation can be assumed, which can also be configured using an electric pump that does not use the driving force of the engine instead of the mechanical pump.
  • an electric pump that does not use the driving force of the engine instead of the mechanical pump.
  • a low viscosity hydraulic oil even at low temperatures.
  • the hydraulic oil is common to the engine oil supplied to the lubrication site inside the engine, the performance may be degraded by being exposed to the lubrication site and high temperature. And there is a risk that the engine performance itself will be impaired.
  • valve timing control device described in Patent Document 2 has a problem that the device cost is greatly increased by mounting the electric motor.
  • the present invention has been made in view of the above problems, and an object of the present invention is to open the valve well even when the engine is started with no significant increase in the device cost. It is a point of providing the valve timing control device which can control closing time.
  • a characterizing feature of the valve timing control device for achieving the above object is a drive side rotation member that rotates in synchronization with a crankshaft of an internal combustion engine;
  • a driven side rotating member disposed coaxially with the drive side rotating member and integrally rotating with respect to a valve shaft for opening and closing a valve of the internal combustion engine;
  • a retarding chamber for changing the relative rotational phase of the driven side rotational member with respect to the drive side rotational member in the retarding direction
  • an advancing chamber for changing the relative rotational phase in the advancing direction
  • the advancing chamber and the advancing chamber A fluid storage portion for controlling a valve opening / closing timing which stores a fluid supplied only to the retarding chamber, a fluid supply to the advancing chamber and the retarding chamber, and a fluid storage from the advancing chamber and the retarding chamber
  • a fluid control valve for discharging the fluid to the control unit, and a fluid supply / discharge means having an electrically operated pump for discharging the fluid stored in the fluid storage unit toward the fluid control valve.
  • the fluid storage portion for controlling the valve opening / closing timing for storing the fluid supplied only to the advance chambers and the retard chambers is provided, regardless of the operation of the internal combustion engine.
  • a fluid can be supplied to change the relative rotational phase.
  • the fluid since the fluid is stored in a dedicated fluid storage unit and does not flow through a site exposed to high temperature, such as a lubrication system of an internal combustion engine, for example, it is not necessary to consider the characteristic change of the fluid at high temperature. Therefore, it is possible to use a lower viscosity fluid which has good properties at low temperatures when the internal combustion engine is cold. That is, it is possible to adopt a small output and small electric pump as a pump for discharging the fluid.
  • valve timing control device capable of favorably controlling the valve timing even when the engine is started as an internal combustion engine which does not significantly increase the device cost.
  • valve timing control device Another feature of the valve timing control device according to the present invention is that the fluid supply and discharge means is installed independently of the lubrication system of the internal combustion engine through which the fluid flows. .
  • the fluid used for adjusting the relative rotational phase flows through an independent flow path in the lubrication system inside the engine, so that foreign matter generated in the lubrication system becomes a fluid.
  • There is no risk of mixing for example, there is no risk of mixing metal powder etc.
  • clean fluid can be supplied to the advance chamber and the retard chamber. Therefore, the possibility of a failure or the like in the valve timing control device can be reduced, and the reliability of the device can be improved.
  • valve timing control device comprises a fluid refilling path that enables the fluid reservoir to be refilled with fluid from the lubrication system of the internal combustion engine through which fluid flows. It is in.
  • the lubrication system force is replenished with the fluid, so a sufficient amount of hydraulic oil is always supplied to the fluid supply and discharge means. It can be in the state of flowing.
  • the electric pump force can also be performed well without interrupting the supply of fluid to the fluid control valve, that is, the supply of fluid to the advancing and retarding chambers.
  • valve timing control device comprises temperature control means for controlling the temperature of the fluid supplied to the advance chamber and the retard chamber.
  • the temperature of the fluid can be adjusted using the temperature adjustment means to appropriately adjust the viscosity of the fluid. Therefore, the valve timing control device can smoothly supply the hydraulic oil to the advance chambers and the retard chambers.
  • valve timing control device Another feature of the valve timing control device according to the present invention is that the fluid reservoir is configured to be filled with a fluid.
  • valve timing control device Another feature of the valve timing control device according to the present invention is that the fluid storage unit is connected to the fluid storage unit via a connection path, and the fluid level of the fluid is higher than that of the fluid storage unit. The point is to provide an auxiliary fluid reservoir.
  • the fluid is replenished from the auxiliary fluid storage section, and therefore, the amount sufficient in the fluid supply and discharge means is always obtained.
  • the fluid can be circulating. As a result, the fluid supply to the electric pump power control valve can be performed without interruption.
  • Another feature of the valve timing control device is the flow resistance of the fluid in the connection path, the flow resistance of the fluid between the fluid reservoir and the electric pump, and The flow resistance between the fluid reservoir and the fluid control valve is greater than that of the fluid control valve;
  • resistance force S is present to the inflow of fluid from the auxiliary fluid reservoir to the fluid reservoir. That is, in the fluid supply and discharge means, the flow of fluid between the fluid control valve and the fluid reservoir, and the flow of fluid between the electric pump and the fluid reservoir are the auxiliary fluid reservoir and the fluid reservoir. It will be easily done with less resistance than the flow of fluid between parts. Therefore, the flow of fluid is preferentially performed in the path in which the fluid flows through the fluid reservoir, the electric pump, and the fluid control valve in order. And, the flow of fluid between the auxiliary fluid reservoir and the fluid reservoir is additionally performed.
  • valve timing control device according to the first embodiment will be described below with reference to the drawings.
  • FIG. 1 is a schematic block diagram of an engine E as an internal combustion engine
  • FIG. 2 is a side sectional view of a valve timing control device 51.
  • the valve timing control device 51 can be divided into a fluid supply / discharge part F and a valve control mechanism part V described below.
  • 3 is a front sectional view of the valve timing control device 51
  • FIG. 4 is a valve timing control device 51 using a cross sectional view of the valve control mechanism V in the IV-IV cross section of FIG. FIG.
  • the configurations of the valve control mechanism section V and the fluid supply / discharge section F will be described below with reference to FIGS. 1 to 4.
  • the valve control mechanism V of the valve timing control device 51 has an external rotor 21 as a drive side rotation member and an inside as a driven side rotation member. And a rotor 22.
  • the outer rotor 21 rotates in synchronization with the crankshaft 5 of the engine E.
  • the inner rotor 22 is disposed coaxially with the outer rotor 21 so as to be rotatable relative to the outer rotor 21, and integrally rotates with the valve opening / closing camshaft 2.
  • a timing chain 6 as a power transmission member is bridged between a timing sprocket 45 provided on the outer periphery of a rear plate 26 described later and a sprocket (not shown) attached to the crankshaft 5 of the engine E. Then, when the crankshaft 5 of the engine E is rotationally driven, rotational power is transmitted to the timing sprocket 45 via the timing chain 6, and the external rotor 21 is rotationally driven along the rotational direction S shown in FIG. Along with this, the inner rotor 22 is rotationally driven along the rotational direction S, and the camshaft 2 is rotated. As a result, the camshaft 2 The cam (not shown) pressed down depresses the intake valve 7 and the exhaust valve 8 of the engine E to open it.
  • the outer rotor 21 is provided with a plurality of projections 21b functioning as a radially inwardly projecting protrusion, spaced apart from one another along the circumferential direction.
  • a fluid pressure chamber 23 defined by the outer rotor 21 and the inner rotor 22 is formed between the adjacent protrusions 21 b provided on the outer rotor 21.
  • four fluid pressure chambers 23 are formed. Further, at a position facing the fluid pressure chambers 23 on the outer peripheral portion of the inner rotor 22, the fluid pressure chambers 23 are advanced with respect to the advance angle chambers 23a in the relative rotation direction (the arrow S1 direction and the arrow S2 direction in FIG. Vane 24 divided into corner chamber 23b is disposed along the radial direction.
  • the inner rotor 22 is integrally assembled by means of a bolt 4 at the end of a camshaft 2 supported so as to rotate integrally with the cylinder head of the engine E.
  • the outer rotor 21 is sandwiched by the front plate 25 and the rear plate 26.
  • a timing sprocket 45 is provided on the outer periphery of the rear plate 26! /.
  • the front plate 25, the outer rotor 21 and the rear plate 26 are integrally fixed by a plurality of connecting bolts 27 arranged along the circumferential direction.
  • the outer rotor 21 is mounted coaxially with the inner rotor 22.
  • the fluid supply / discharge unit F is integrally formed with the timing chain case 14 and supplies hydraulic fluid to the advance chambers 23a and 23b and discharges hydraulic fluid from the advance chambers 23a and 23b. .
  • the fluid supply / discharge unit F includes an oil tank 19 as a fluid storage unit for valve timing control, which stores hydraulic oil supplied only to the advance chambers 23a and the retard chambers 23b, and an advance chamber.
  • Fluid control valve 11 for supplying hydraulic fluid to retard chamber 23a and retard chamber 23b and discharging hydraulic fluid from advance chamber 23a and retard chamber 23b to oil tank 19, and hydraulic fluid stored in oil tank 19
  • an electric pump 10 for discharging the fluid toward the fluid control valve 11.
  • the fluid supply and discharge unit F is installed independently of the lubrication system of the engine E through which the hydraulic oil flows. Therefore, the hydraulic oil is not exposed to the high temperature of engine E's lubrication system or the like.
  • the hydraulic oil is always stored in the oil tank 19 at a predetermined amount or more, and is naturally supplied to the suction path 16 when the amount of hydraulic oil in the suction path 16 starts to decrease. It is configured. Therefore, when the electric pump 10 is operated and the hydraulic fluid is discharged from the discharge passage 15 to the fluid control valve 11, new hydraulic fluid is supplied to the suction passage 16 from the oil tank 19.
  • the fluid control valve 11 includes a spool 13 provided in the sleeve 9 and a solenoid mechanism 12 for driving the spool 13.
  • the sleeve 9 has an advancing port communicating with the passage 17 connected to the advancing chamber 23a, a retarding port communicating with the passage 18 connected to the retarding chamber 23b, and a port communicating with the discharge passage 15 And have.
  • the advancing chamber 23a of the fluid pressure chamber 23 communicates with the advancing oil passage 22a formed in the internal rotor 22, and the retarding chamber 23b communicates with the retarding oil passage 22b formed in the internal rotor 22.
  • the passage 17 connected to the advance port of the body control valve 11 penetrates the inside of the projecting portion 14 a of the timing chain case 14 and is connected to the oil reservoir 20 formed between the projecting portion 14 a and the bolt 4. It communicates.
  • the oil reservoir 20 is connected to the advance oil passage 22a.
  • the passage 18 connected to the retardation port of the fluid control valve 11 is formed inside the projecting portion 14 a of the timing chain case 14 and reaches the interface between the projecting portion 14 a and the inner rotor 22.
  • the passage 18 is formed in a groove shape that goes around the surface of the projecting portion 14 a at the interface between the projecting portion 14 a and the inner rotor 22.
  • the grooved passage 18 is connected to the retarded oil passage 22b.
  • the advance oil passage 22 a is connected to the fluid control valve 11 via the passage 17, and the retard oil passage 22 b is connected to the fluid control valve 11 via the passage 18. Then, the hydraulic oil from the fluid control valve 11 is supplied or discharged to one or both of the advancing chamber 23a and the retarding chamber 23b, thereby advancing the relative rotational phase between the inner rotor 22 and the outer rotor 21.
  • Direction S1 (direction of displacement of relative position of vane 24 indicated by arrow S1 in FIG. 4) or retardation direction S 2 (direction of displacement of relative position of vane 24 indicated by arrow S2 in FIG. 4)
  • a biasing force is generated to hold or hold an arbitrary phase.
  • the hydraulic oil used for adjusting the relative rotational phase by the valve timing control device 51 is stored in the dedicated oil tank 19 and is pumped by the dedicated electric pump 10. .
  • the fluid supply and discharge unit F is configured as a separate system independent of the engine wall used in the lubrication system of the engine E. As a result, it becomes possible to operate the valve timing control device 51 regardless of the operation of the engine E, and it becomes possible to control the valve timing well even when the engine is cold.
  • the valve control mechanism It is possible to supply clean hydraulic oil to Part V. Therefore, the valve timing control device 51 according to the present embodiment can be used also for an engine such as a diesel engine that has a high possibility of soot mixing in a lubrication system. Further, the possibility of a failure or the like in the valve control mechanism section V can be reduced, and the reliability of the valve timing control device 51 can be improved.
  • the hydraulic oil supply system in the fluid supply and discharge unit F provided in the valve timing control device 51 can be a system separate from the lubrication system of the engine E, the volume of the oil pump provided in the lubrication system of the engine E can be reduced. it can.
  • the valve timing control device differs from the valve timing control device according to the first embodiment in that a temperature control unit is provided to control the temperature of hydraulic fluid as a fluid.
  • a temperature control unit is provided to control the temperature of hydraulic fluid as a fluid.
  • FIG. 5 is a configuration diagram of a valve timing control device 52 according to a second embodiment using a cross-sectional view of the valve control mechanism V in the IV-IV cross section of FIG.
  • the oil tank 19 is provided with a temperature control means 27 for controlling the temperature of the stored hydraulic fluid.
  • the temperature control unit 27 refers to the measurement results of the temperature measurement unit T that measures the temperature of the hydraulic fluid in the oil tank 19, the heater 28 that heats the hydraulic fluid in the oil tank 19, and the temperature measurement unit T.
  • a temperature control unit 29 that controls the state of energization of the heater 28.
  • the temperature measuring unit T and the heater 28 are provided at positions in contact with the hydraulic oil in the oil tank 19.
  • the temperature control unit 29 controls the energization state of the heater 29 so that the temperature of the hydraulic fluid measured by the temperature measurement unit T becomes the set temperature.
  • a cooler such as a Peltier element should be provided instead of the heater 29.
  • valve timing control device of the present embodiment includes the temperature control means for controlling the temperature of the hydraulic oil supplied to the advance chambers and the retard chambers, the viscosity of the hydraulic oil is Can be adjusted properly. Therefore, the valve timing control device of the present embodiment can smoothly supply the hydraulic oil to the advance chambers and the retard chambers.
  • Temperature adjustment means may be provided at another site as long as the temperature of the oil can be adjusted.
  • the temperature control means for controlling the temperature of the hydraulic fluid is provided in the valve timing control device of the first embodiment has been described. The same effect can be obtained by providing a temperature control means.
  • valve timing control device of the third embodiment differs from the first embodiment in the configuration of the flow path of the hydraulic oil.
  • the configuration of the valve timing control device according to the third embodiment will be described below, but the description of the same configuration as that of the first embodiment will be omitted.
  • FIG. 6 is a configuration diagram of a valve timing control device 53 according to a third embodiment using a cross-sectional view of the valve control mechanism V in the IV-IV cross section of FIG.
  • a check valve for preventing backflow of hydraulic fluid from the fluid control valve 11 to the electric pump 10 in the discharge passage 15 from the electric pump 10 to the fluid control valve 11.
  • a branch passage 34 branched from the discharge passage 15 to the oil tank 19 is connected to the discharge passage 15 between the electric pump 10 and the check valve 32.
  • a check valve 33 is provided in the branch passage 34 to prevent backflow of hydraulic oil from the oil tank 19 to the electric pump 10.
  • valve opening pressure of the check valve 32 is set smaller than the valve opening pressure of the check valve 33. Therefore, normally, the hydraulic fluid discharged from the electric pump 10 can not push open the check valve 33, but pushes open the check valve 32 to flow into the fluid control valve 11.
  • valve timing control device of the fourth embodiment is different from the first to third embodiments in that the oil tank can be replenished with hydraulic oil.
  • the configuration of the valve timing control device according to the fourth embodiment will be described below, but the description of the same configuration as that of the first to third embodiments will be omitted.
  • FIG. 7 is a front sectional view of the valve timing control device according to the fourth embodiment.
  • the valve timing control device 54 of the fourth embodiment is connected to the oil tank 19 via the connection path 31 which is not provided by the oil tank 19 alone, and the fluid of the working oil is more fluid than the oil tank 19.
  • hydraulic fluid should be kept at the same level as the liquid level of the auxiliary oil tank 30 in the part that communicates with the auxiliary oil tank 30. it can.
  • the passage 17 and the passage 18 communicate with the auxiliary wall tank 30, a certain amount of hydraulic fluid may be retained in the passage 17 and the passage 18 even when the electric pump 10 is stopped. it can.
  • hydraulic oil can be quickly supplied to the advance chambers 23a and the retard chambers 23b.
  • connection path 31 shown in FIG. 7 is provided with a resistance portion (for example, the orifice 32 and the like in the present embodiment) which is a resistance to the flow of the hydraulic oil. That is, by providing the orifice 32, the flow resistance of the hydraulic oil in the connection passage 31 can be controlled by the flow resistance of the fluid between the oil tank 19 and the electric pump 10 and the oil tank 19 and the fluid control valve 11. The flow resistance of the hydraulic oil between them is configured to be larger. With this configuration, the hydraulic oil from which the fluid control valve 11 is discharged is more likely to flow into the oil tank 19 than the hydraulic oil from the auxiliary oil tank 30.
  • a resistance portion for example, the orifice 32 and the like in the present embodiment
  • the circulation of the hydraulic oil in the circulation system (system in which the electric pump 10, the fluid control valve 11 and the oil tank 19 sequentially flow) in which the hydraulic oil flow resistance is smaller is the auxiliary oil tank 30 and the oil tank 19 It takes precedence over hydraulic oil flow during the period.
  • the auxiliary oil tank capable of replenishing the hydraulic oil is connected to the oil tank in the valve timing control device of the first embodiment, but the valve timing of another configuration is described. The same effect can be obtained by modifying the control device to connect similar auxiliary oil tanks.
  • valve timing control device differs from the first to third embodiments in that the oil tank can be replenished with hydraulic oil.
  • the configuration of the valve timing control device according to the fifth embodiment will be described below, but the description of the same configuration as that of the first to third embodiments will be omitted.
  • FIG. 8 is a configuration diagram of a valve timing control device 55 according to a fifth embodiment using a cross-sectional view of the valve control mechanism V in the IV-IV cross section of FIG.
  • a lubrication system L is provided in the engine E for supplying engine oil stored in an oil pan 35 to a lubrication portion 37 such as a valve system.
  • a mechanical pump 36 driven using the power of the crankshaft 5 of the engine E discharges the engine oil stored in the oil pan 35 to the lubrication portion 37. It is configured. Then, the engine oil supplied to the lubrication portion 37 returns to the oil pan 35.
  • This flow path is a fluid replenishment path 38 which enables the lubrication system L inside the engine E to also replenish the oil tank 19 with the engine oil (hydraulic oil). Therefore, in the present embodiment, the hydraulic oil used in the fluid supply and discharge unit F and the engine oil used in the lubrication system L are the same.
  • the fluid replenishment path 38 As a mechanism by which engine oil (hydraulic oil) is transferred to the oil tank 19 through the fluid replenishment path 38, a mechanism for causing engine oil higher than the oil tank 19 to flow into the oil tank 19 by gravity. Alternatively, there is a mechanism for providing a pump or the like (not shown) in the fluid replenishment path 38 for pumping.
  • the fluid replenishment path 38 is illustrated as being connected to the lubrication site 37.
  • the fluid replenishment path 38 is connected somewhere to the lubrication system L, V,.
  • the lubrication system L force may also be connected directly to the oil pan 35 when the hydraulic fluid is supplied to the oil tank 19 using a pump.
  • valve timing control device As described above, in the present embodiment, leakage of hydraulic fluid from the fluid supply / discharge unit F or the like occurs. However, since engine oil (hydraulic oil) is replenished from the lubrication system L, a sufficient amount of hydraulic oil can be circulated in the fluid supply and discharge part F at all times. As a result, the supply of hydraulic fluid from the electric pump 10 to the fluid control valve 11 can be performed without interruption.
  • the valve timing control device according to the first embodiment explains the example in which the hydraulic oil can be replenished from the lubrication system to the oil tank. A similar modification can be made to make the tank refillable with hydraulic fluid with the same effect.
  • the fluid supply and discharge unit F is provided for one camshaft.
  • the fluid supply / discharge unit F includes the fluid control valve 11 already described in the above embodiment, and the spool 43 and the solenoid mechanism 42 which are newly described here.
  • valve control mechanism V for each camshaft
  • the advance port and the retard port of the fluid control valve 41 are respectively communicated with the passage 47 and the passage 48 to supply the hydraulic oil to the advance chamber and the retard chamber.
  • the oil tank 19 is a fluid storage portion for controlling valve opening / closing timing, which stores hydraulic oil supplied only to the advance chambers and the retard chambers.
  • FIG. 9 describes an example in which the fluid supply and discharge unit F is provided independently of the lubricating system of the engine E, as in the fifth embodiment, the lubricating system L inside the engine E also has an oil tank.
  • the engine oil (hydraulic oil) may be modified so that it can be replenished.
  • the head direction of the bolt 4 connecting the camshaft 2 and the inner rotor 22 Although the case where the fluid supply and discharge part F is provided has been described, the position where the fluid supply and discharge part F is provided is not particularly limited, and can be appropriately changed.
  • valve control mechanism V as illustrated in FIG. 4 can be modified as appropriate.
  • the number of fluid pressure chambers 23 may be changed.
  • a restriction mechanism or the like capable of restricting the relative rotational phase of the inner rotor 22 with respect to the outer rotor 21 may be additionally provided.
  • valve timing control device with various configurations has been described.
  • the device configurations described in the above-described embodiment and the other embodiments are different from those of the other embodiments. It can also be installed in the valve timing control device.
  • the configuration of the temperature control means described in the second embodiment the configuration of the flow path of hydraulic fluid described in the third embodiment, the auxiliary oil tank described in the fourth embodiment, and the circulation described in the fifth embodiment
  • the configuration for replenishing hydraulic oil from the system and the configuration described in the other embodiments may be applied to the valve timing control device described in the other embodiments.
  • valve timing control devices may be provided, including the configuration of the temperature control unit described in the second embodiment and the configuration of the flow path of the hydraulic oil described in the third embodiment. It is also possible to construct a valve timing control device having a configuration combining the embodiments.
  • the valve timing control device can be used to appropriately adjust the valve timing in an internal combustion engine such as a vehicle engine even in a cold state when starting the internal combustion engine.
  • FIG. 1 A schematic configuration diagram of an internal combustion engine
  • FIG. 2 Side sectional view of the valve timing control device according to the first embodiment
  • FIG. 3 A front sectional view of the valve timing control device according to the first embodiment
  • FIG. 5 A block diagram of the valve timing control device according to the second embodiment
  • FIG. 6 A block diagram of a valve timing control device according to the third embodiment
  • FIG. 7 Front sectional view of the valve timing control device according to the fourth embodiment
  • FIG. 8 Configuration view of the valve timing control device according to the fifth embodiment
  • FIG. 9 Front of the valve timing control device according to another embodiment
  • Oil tank (fluid reservoir)
  • Fluid supply and discharge part (fluid supply and discharge means)

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

L'invention porte sur un dispositif (51) pour commander le moment d'ouverture et de fermeture d'une soupape qui a un moyen d'alimentation/de refoulement de fluide (F). Ce moyen d'alimentation/de refoulement de fluide (F) a un section (19) contenant le fluide, une soupape (11) de contrôle du fluide, et une pompe entraînée électriquement (10). On utilise la section (19) contenant le fluide pour commander le moment d'ouverture et de fermeture de la soupape et cette section contient le fluide qui est alimenté seulement à une chambre d'avance à l'allumage et à une chambre de retard à l'allumage afin de varier la phase de rotation d'un élément rotatif mené (22) par rapport à un élément rotatif menant (21). La soupape (11) de contrôle de fluide alimente le fluide à la chambre d'avance à l'allumage et à la chambre de retard à l'allumage et refoule le fluide de la chambre d'avance à l'allumage et de la chambre de retard à l'allumage vers la section (19) contenant le fluide. La pompe entraînée électriquement (10) refoule le fluide contenu dans la section (19) contenant le fluide vers la soupape (11) de contrôle du fluide.
PCT/JP2006/324252 2005-12-27 2006-12-05 Dispositif pour commander le moment d'ouverture et de fermeture d'une soupape WO2007074612A1 (fr)

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JP2005-374950 2005-12-27

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009044804A (ja) * 2007-08-06 2009-02-26 Honda Motor Co Ltd 電動機の制御装置
JP2009079544A (ja) * 2007-09-26 2009-04-16 Honda Motor Co Ltd 電磁弁の取付構造
WO2012175100A1 (fr) * 2011-06-21 2012-12-27 Daimler Ag Dispositif de réglage permettant un réglage variable d'un taux de compression d'un moteur à combustion interne
CN104343482A (zh) * 2013-07-31 2015-02-11 爱信精机株式会社 阀开闭时期控制装置
AT520809A1 (de) * 2018-01-11 2019-07-15 Avl List Gbmh Brennkraftmaschine

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JPH1113429A (ja) * 1997-06-20 1999-01-19 Toyota Motor Corp 内燃機関のバルブ開閉特性制御装置
JP2004245074A (ja) * 2003-02-12 2004-09-02 Mazda Motor Corp エンジンの可変動弁装置
JP2004346769A (ja) * 2003-05-20 2004-12-09 Toyota Motor Corp 油圧装置
JP2005330891A (ja) * 2004-05-20 2005-12-02 Hitachi Ltd 内燃機関のバルブタイミング制御装置
JP2005351280A (ja) * 2004-06-08 2005-12-22 Hitachi Ltd アクチュエータ装置

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JP2001342812A (ja) * 2000-05-31 2001-12-14 Sanshin Ind Co Ltd 船外機用４サイクルエンジン

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Publication number Priority date Publication date Assignee Title
JPH1113429A (ja) * 1997-06-20 1999-01-19 Toyota Motor Corp 内燃機関のバルブ開閉特性制御装置
JP2004245074A (ja) * 2003-02-12 2004-09-02 Mazda Motor Corp エンジンの可変動弁装置
JP2004346769A (ja) * 2003-05-20 2004-12-09 Toyota Motor Corp 油圧装置
JP2005330891A (ja) * 2004-05-20 2005-12-02 Hitachi Ltd 内燃機関のバルブタイミング制御装置
JP2005351280A (ja) * 2004-06-08 2005-12-22 Hitachi Ltd アクチュエータ装置

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009044804A (ja) * 2007-08-06 2009-02-26 Honda Motor Co Ltd 電動機の制御装置
JP2009079544A (ja) * 2007-09-26 2009-04-16 Honda Motor Co Ltd 電磁弁の取付構造
WO2012175100A1 (fr) * 2011-06-21 2012-12-27 Daimler Ag Dispositif de réglage permettant un réglage variable d'un taux de compression d'un moteur à combustion interne
CN104343482A (zh) * 2013-07-31 2015-02-11 爱信精机株式会社 阀开闭时期控制装置
US9423011B2 (en) 2013-07-31 2016-08-23 Aisin Seiki Kabushiki Kaisha Variable valve timing control apparatus
EP2881620B1 (fr) * 2013-07-31 2017-04-26 Aisin Seiki Kabushiki Kaisha Appareil de commande du réglage de distribution variable
AT520809A1 (de) * 2018-01-11 2019-07-15 Avl List Gbmh Brennkraftmaschine
AT520809B1 (de) * 2018-01-11 2022-12-15 Avl List Gbmh Brennkraftmaschine

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JP4721070B2 (ja) 2011-07-13
JPWO2007074612A1 (ja) 2009-06-04

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