WO2013105247A1 - バルブタイミング制御装置 - Google Patents
バルブタイミング制御装置 Download PDFInfo
- Publication number
- WO2013105247A1 WO2013105247A1 PCT/JP2012/050496 JP2012050496W WO2013105247A1 WO 2013105247 A1 WO2013105247 A1 WO 2013105247A1 JP 2012050496 W JP2012050496 W JP 2012050496W WO 2013105247 A1 WO2013105247 A1 WO 2013105247A1
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- WO
- WIPO (PCT)
- Prior art keywords
- valve
- rotating body
- internal combustion
- combustion engine
- valve timing
- Prior art date
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Classifications
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- 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
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- 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
- F01L1/34409—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 by torque-responsive means
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- 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
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- 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
- F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
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- 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
- F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
- F01L2001/34453—Locking means between driving and driven members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/0203—Variable control of intake and exhaust valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
- F02D2041/001—Controlling intake air for engines with variable valve actuation
Definitions
- the present invention relates to a technical field of a valve timing control device capable of changing an opening / closing timing of at least one of an intake valve and an exhaust valve of an internal combustion engine.
- a lock mechanism that is coupled to a camshaft, can change the relative phase of the camshaft with respect to the crankshaft within a predetermined change range, and sets the relative phase to a lock position.
- An apparatus including an actuator having the same has been proposed.
- the unlock mode for unlocking the lock pin is executed Is disclosed (see Patent Document 1).
- valve timing adjusting device including a first rotating body, a second rotating body, and a lock pin that restrains relative rotation of the first rotating body and the second rotating body
- a valve timing adjusting device configured to prevent oil from flowing into the retarded chamber until the restraints of the first rotating body and the second rotating body are completely released (see Patent Document 2).
- a valve timing adjustment device including a vane rotor that rotates together with a camshaft, a housing that rotates relative to the vane rotor, and a lock mechanism that restricts relative rotation of the vane rotor and the housing, torque fluctuation of the camshaft is increased. Therefore, a technique has been proposed in which the rocking of the housing and the vane rotor is vigorously performed so that the lock pin is easily removed (see Patent Document 3).
- the first rotating body that rotates in synchronization with the crankshaft, the second rotating body that is fixed to the camshaft, and the second rotating body is locked at the first relative angle with respect to the first rotating body.
- a cam phase actuator having a lock mechanism there is a technology for performing lock pin release control only at the time of advance angle control when it is determined to be in a locked state, and reducing the occurrence of an advance angle operation delay due to the lock pin release control. It has been proposed (see Patent Document 4).
- the lock pin has a technical problem that shearing force due to torque due to opening / closing drive of at least one of the intake valve and the exhaust valve acts, and it may be difficult to release the lock pin. In the above background art, it is extremely difficult to solve the technical problem.
- the present invention has been made in view of the above-mentioned problems, for example, and an object of the present invention is to provide a valve timing control device capable of properly releasing a lock pin.
- valve timing control device of the present invention rotates in synchronization with rotation of a camshaft that opens and closes at least one of an intake valve and an exhaust valve of an internal combustion engine and has a plurality of vanes.
- a second rotating body that rotates in synchronization with the rotation of the crankshaft of the internal combustion engine, and that has a plurality of recesses corresponding to the plurality of vanes and defining a movable range of each of the plurality of vanes;
- a locking mechanism for engaging the first rotating body and the second rotating body with each other so that each of the plurality of vanes is in contact with one end of the corresponding recess at least when the internal combustion engine is stopped; and
- Each of the recesses is partitioned by a corresponding vane to control a hydraulic pressure related to a liquid chamber formed on at least one side of the corresponding vane, thereby
- a rotation timing change means capable of changing a relative rotation phase of the camshaft with respect to the engine, and a valve lift amount associated with the intake valve or the exhaust valve when the internal combustion engine is started.
- An advance angle control start means for starting control of the relative rotation phase to an advance angle side when increasing, and a valve lift amount related to the intake valve or the exhaust valve when the internal combustion engine starts
- the apparatus further includes at least one of retard angle control start means for starting control of the relative rotation phase toward the retard angle side.
- the valve timing device includes the first rotating body, the second rotating body, the lock mechanism, and the rotation phase changing means.
- the first rotating body is, for example, a vane rotor or the like, and has a plurality of vanes.
- the first rotating body rotates in synchronization with the rotation of the camshaft.
- the second rotating body is, for example, a housing or the like, and has a plurality of recesses that respectively correspond to the plurality of vanes of the first rotating body and define the movable range of each of the plurality of vanes.
- the second rotating body rotates in synchronization with the rotation of the crankshaft.
- the locking mechanism connects the first rotating body and the second rotating body to each other so that each of the plurality of vanes of the first rotating body is in contact with one end of the corresponding recess of the second rotating body at least when the internal combustion engine is stopped. Engage.
- the rotation phase changing means is configured to define a hydraulic pressure related to a liquid chamber formed on at least one side of the corresponding vane by dividing each of the plurality of concave portions of the second rotating body with the vanes of the corresponding first rotating body. By controlling (for example, hydraulic pressure), the relative rotation phase of the camshaft with respect to the crankshaft can be changed.
- the valve timing control apparatus further includes at least one of an advance angle control start unit including a memory, a processor, and the like, and a retard angle control start unit including, for example, a memory, a processor, and the like. .
- the advance angle control starting means including a memory, a processor, etc. is used when the internal combustion engine is started and when the valve lift amount related to the intake valve or the exhaust valve is increased (that is, when the intake valve or the exhaust valve is lowered). ), Control of the relative rotational phase is started toward the advance side.
- “At the time of starting the internal combustion engine” refers to the time from the start of cranking or the time before the cranking start time to a predetermined time (for example, the time when the start request signal is transmitted) until the internal combustion engine is completely detonated. Means period.
- Start control of relative rotation phase toward the advance side means, for example, releasing the engagement of the first rotating body and the second rotating body by the lock mechanism and ensuring the necessary hydraulic pressure, etc. This means that a series of control processes including processes necessary until the phase starts to change toward the advance side is started.
- the retard control start means including a memory, a processor, etc. is used when the internal combustion engine is started and when the valve lift amount related to the intake valve or the exhaust valve is reduced (that is, when the intake valve or the exhaust valve is raised). ), Control of the relative rotational phase is started toward the retarded angle side.
- “Start control of the relative rotational phase toward the retarded angle” means, for example, releasing the engagement of the first rotating body and the second rotating body by the lock mechanism and ensuring the necessary hydraulic pressure, etc. This means that a series of control processes including processes necessary until the phase starts to change toward the retarded side is started.
- the crankshaft when starting the internal combustion engine, typically, the crankshaft is rotated before the engagement of the first rotating body and the second rotating body by the lock mechanism is released.
- the camshaft is also rotated in conjunction with the rotation of the crankshaft, and the intake valve and the exhaust valve are opened and closed with the rotation of the camshaft.
- torque fluctuation occurs in the camshaft due to the opening / closing operation of at least one of the intake valve and the exhaust valve, and shear force acts on the lock pin constituting the lock mechanism.
- shear force acts on the lock pin constituting the lock mechanism.
- the engagement between the first rotating body and the second rotating body cannot be released or is difficult to release due to the influence of the shearing force.
- the magnitude of the shear force acting on the lock pin changes periodically. Specifically, for example, when the relative rotational phase is changed to the advance side (that is, in the case of so-called retard lock, in which the first rotary body and the second rotary body are engaged on the retard side), the valve lift When the amount is increased, the magnitude of the shear force acting on the lock pin becomes relatively small. On the other hand, when the relative rotational phase is changed to the retard side (that is, in the case of so-called advance lock where the first rotary body and the second rotary body are engaged on the advance side), the valve lift amount decreases. The shear force acting on the lock pin is relatively small.
- the advance angle control start means when the internal combustion engine is started and the valve lift amount related to the intake valve or the exhaust valve is increased by the advance angle control start means, control of the relative rotation phase to the advance side is started.
- the retard control start means starts control of the relative rotation phase toward the retard side.
- the advance angle control start means is configured to start the internal combustion engine and to increase the lock mechanism when the valve lift amount related to the intake valve or the exhaust valve is increased.
- the relative rotation phase is controlled to advance toward the advance side so that the engagement of the first rotating body and the second rotating body is released.
- the lock pin can be reliably released, which is very advantageous in practice.
- the relative rotational phase (valve timing) can be changed relatively quickly.
- the advance angle control start means starts control of the relative rotation phase toward the advance angle side so that the engagement of the first rotating body and the second rotating body by the lock mechanism is released when the valve lift amount is increased. If comprised so, the lock pin of a lock mechanism can be cancelled
- the retard angle control start means is configured to lock the lock when the internal combustion engine is started and a valve lift amount related to the intake valve or the exhaust valve is reduced.
- the relative rotation phase is controlled to be retarded so that the engagement of the first rotating body and the second rotating body by the mechanism is released.
- the lock pin can be reliably released, which is very advantageous in practice.
- the relative rotational phase can be changed relatively quickly.
- valve timing control device of the present invention will be described with reference to the drawings.
- FIG. 1 is a block diagram illustrating a configuration of an engine according to the embodiment.
- an engine 1 as an example of an “internal combustion engine” according to the present invention includes a cylinder 11, a piston 12, an intake passage 13, an intake valve 14, an exhaust passage 15, and an exhaust valve 16. .
- members not directly related to the present invention are not shown.
- the engine 1 includes: (i) a cam 21 that drives the intake valve 14 to open and close; a camshaft 23 that is connected to the cam 21; and an actuator that is coupled to the camshaft 23 and that can change the rotational phase of the camshaft 23. 25, and an oil control valve (OCV) 27 that supplies hydraulic pressure to the actuator 25, and a variable valve timing mechanism (Variable Valve Timing: VVT) on the intake side, and (ii) a cam 22 that drives the exhaust valve 16 to open and close A camshaft 24 to which the cam 22 is connected, an actuator 26 coupled to the camshaft 24 and capable of changing the rotational phase of the camshaft, an oil control valve 28 for supplying hydraulic pressure to the actuator 26, A variable valve timing mechanism on the exhaust side having It has been made.
- OCV oil control valve
- the ECU (Electronic Control Unit: electronic control unit) 30 controls the oil control valves 27 and 28 according to the state of the engine 1 and the like.
- FIG. 2 is a diagram illustrating a main part of the variable valve timing mechanism on the intake side according to the embodiment.
- the actuator 25 includes a housing 251 that rotates in synchronization with the rotation of a crankshaft (not shown) of the engine 1, a vane rotor 252 that rotates in synchronization with the rotation of the camshaft 23, and at least the stop of the engine 1.
- the housing 251 and the vane rotor 252 are configured to include a lock mechanism 253 that engages with each other.
- the housing 251 corresponds to the plurality of vanes 252a, 252b, 252c, and 252d of the vane rotor 252, respectively, and a plurality of recesses 251a, 251b, 251c, and 251d that define the movable ranges of the plurality of vanes 252a, 252b, 252c, and 252d, respectively.
- Oil stored in the oil pan of the engine 1 is pumped up through an oil strainer by an oil pump, and after removing foreign matter by an oil filter, an oil control valve is passed through a check valve and a VVT oil passage. 27.
- the oil control valve 27 includes a liquid chamber (specifically, a plurality of recesses 251a, 251b, 251c, and 251d of the housing 251 that are defined by at least one side of the corresponding vane. Controls the hydraulic pressure (here, hydraulic pressure) related to the advance chamber and retard chamber.
- the relative position between the housing 251 and the vane rotor 252 is changed, and as a result, the relative rotational phase of the camshaft 23 with respect to the crankshaft is changed.
- the amount of oil supplied from the oil control valve 27 to the actuator 25 is determined based on the VVT control signal output from the ECU 30.
- the valve timing control device 100 includes an actuator 25, an oil control valve 27, and an ECU 30. That is, in this embodiment, a part of the functions of the ECU 30 for various electronic controls of the engine 1 (and the vehicle on which the engine 1 is mounted) is used as a part of the valve timing control device 100.
- FIG. 2 shows a state in which the housing 251 and the vane rotor 252 are engaged in a state in which the plurality of vanes 252a, 252b, 252c, and 252d are adjusted to the most retarded position by the lock mechanism 253. ing.
- the camshaft 23 is driven to rotate.
- the cross-sectional shape of the cam 21 is, for example, an egg shape as shown in FIG. 3, the direction of the force that the valve spring of the intake valve 14 applies to the cam 21, and the rotational direction of the camshaft 23 The relationship of changes periodically.
- FIG. 3 is a diagram showing the relationship between the rotation direction of the camshaft and the torque caused by the valve spring according to the embodiment.
- FIG. 4 is a diagram illustrating an example of the time variation of the valve lift amount and the time variation of the shearing force acting on the retard lock pin according to the embodiment.
- the shear force applied to the lock pin is large, the hydraulic pressure required to release the lock pin increases. On the other hand, if the shear force applied to the lock pin is small, the hydraulic pressure required to release the lock pin is small. Therefore, when the shearing force applied to the lock pin is small, the lock pin can be released relatively easily if the lock pin is released.
- the ECU 30 controls the oil control valve 27 so as to release the lock pin when the valve lift amount increases and to start the control of the relative rotation phase of the camshaft 23 relative to the crankshaft to the advance side. Specifically, for example, the ECU 30 starts outputting a VVT advance signal (see the lowermost stage in FIG. 4) to the oil control valve 27 in any of the periods A in FIG.
- the output of the VVT advance signal can only be started after waiting until time t3).
- the output of the VVT advance signal can be started. That is, the output of the VVT advance signal can be started relatively early, and the relative rotation phase can be changed to the advance side.
- the ECU 30 may determine the output timing of the VVT advance signal in consideration of, for example, the time from when the VVT advance signal is output until the hydraulic pressure is actually supplied to the lock pin, friction, and the like. .
- FIG. 5 is a diagram showing an example of temporal variation of the engine speed, VVT retarded chamber hydraulic pressure, and lock pin hydraulic pressure.
- FIG. 6 is a flowchart showing the calculation processing of the advance amount of the opening / closing timing of the intake valve 14
- FIG. 7 is a flowchart showing the control processing related to the oil control valve 27.
- the ECU 30 first sets an initial value related to the opening / closing timing of the intake valve 14 (step S101). Next, the ECU 30 learns the most retarded position (step S102). Note that various known modes can be applied to the method for learning the most retarded angle position, and thus detailed description thereof is omitted.
- the ECU 30 calculates the target VVT advance amount based on, for example, the operating state of the engine 1 (step S103). Since various known modes can be applied to the target VVT advance amount calculation method, a detailed description thereof is omitted.
- a difference that is, a deviation
- a control amount related to the oil control valve 27 is calculated based on the obtained difference (step S105). That is, the oil control valve 27 is feedback (FB) controlled based on the obtained difference.
- the ECU 30 executes the process shown in the flowchart of FIG. That is, in FIG. 7, the ECU 30 first determines whether or not a predetermined time has elapsed since the cranking of the engine 1 was started (step S201).
- the “predetermined time” may be set as a time until the lock pin hydraulic pressure rises to such an extent that the lock pin can be released when the shearing force applied to the lock pin is relatively low.
- step S201 When it is determined that the predetermined time has not elapsed since the cranking of the engine 1 is started (step S201: No), the ECU 30 clears the control amount related to the oil control valve 27 (step S207), and once processes Exit.
- step S201 when it is determined that a predetermined time has elapsed since the cranking of the engine 1 was started (step S201: Yes), the ECU 30 determines whether or not the advance angle start permission flag is ON (step S202). .
- step S202: Yes When it is determined that the advance angle start permission flag is ON (step S202: Yes), the ECU 30 performs a process of step S205 described later.
- step S202: No When the advance angle start permission flag is OFF (step S202: No), the ECU 30 determines whether or not the valve lift amount related to the intake valve 14 is being decreased (step S203).
- step S203 When it is determined that the valve lift amount related to the intake valve 14 is decreasing (step S203: No), the ECU 30 determines that the shear force applied to the retard lock pin is relatively high (see FIG. 4), The process of step S207 is performed.
- step S203 when it is determined that the valve lift amount related to the intake valve 14 is increasing (step S203: No), the ECU 30 determines that the shear force applied to the retard lock pin is relatively low (see FIG. 4). Thus, the advance angle start permission flag is turned ON (step S204).
- the ECU 30 acquires the control amount related to the oil control valve 27 calculated in step S105 described above (step S205). Subsequently, the ECU 30 controls the oil control valve 27 by outputting the acquired control amount related to the oil control valve 27 to the oil control valve 27 (step S206).
- FIG. 8 is a diagram showing a main part of the variable valve timing mechanism on the exhaust side according to the embodiment having the same meaning as in FIG. 2.
- the actuator 26 includes a housing 261 that rotates in synchronization with the rotation of the crankshaft (not shown) of the engine 1, a vane rotor 262 that rotates in synchronization with the rotation of the camshaft 23, and at least the stop of the engine 1.
- it is configured to include a locking mechanism 263 that engages the housing 261 and the vane rotor 262 with each other.
- the housing 261 corresponds to the plurality of vanes 262a, 262b, 262c, and 262d of the vane rotor 262, and a plurality of recesses 261a, 261b, 261c, and 261d that define the movable ranges of the plurality of vanes 262a, 262b, 262c, and 262d, respectively.
- the oil control valve 28 includes a liquid chamber (specifically, a plurality of recesses 261a, 261b, 261c, and 261d of the housing 261 that are defined by at least one side of the corresponding vane. Controls the hydraulic pressure (here, hydraulic pressure) related to the advance chamber and retard chamber.
- the relative position between the housing 261 and the vane rotor 262 is changed, and as a result, the relative rotational phase of the camshaft 24 with respect to the crankshaft is changed.
- the amount of oil supplied from the oil control valve 28 to the actuator 26 is determined based on the VVT control signal output from the ECU 30.
- the valve timing control device 100 further includes an actuator 26 and an oil control valve 28.
- FIG. 8 shows a state in which the housing 261 and the vane rotor 262 are engaged in a state where the plurality of vanes 262a, 262b, 262c, and 262d are adjusted to the most advanced angle position by the lock mechanism 263. ing.
- FIG. 9 is a diagram illustrating an example of the time variation of the valve lift amount and the time variation of the shearing force acting on the advance lock pin according to the embodiment having the same meaning as in FIG. 4.
- the shear force applied to the advance lock pin (that is, the lock pin of the lock mechanism 263 of the actuator 26) becomes relatively large when the valve lift amount related to the exhaust valve 16 is increased. It becomes relatively small when the valve lift amount is reduced.
- the ECU 30 controls the oil control valve 28 so as to release the lock pin when the valve lift amount decreases and to start the control to the retard side of the relative rotation phase of the camshaft 24 with respect to the crankshaft. Specifically, for example, the ECU 30 starts outputting a VVT retardation signal (see the lowermost stage in FIG. 9) to the oil control valve 28 in any period B in FIG.
- step S102 of the flowchart of FIG. 6 is “least advanced position learning” and “target VVT advance amount calculation” in step S103. It should be read as “target VVT retardation amount calculation”.
- step S202 of the flowchart of FIG. 7 “Is the advance start permission flag ON?” Set to “Is the retard start start enable flag ON?” And “Is the valve lift amount decreasing?” “Increase?” And “advance start start permission flag ON” in step S204 may be read as “retard start start permission flag ON”.
- the “vane rotor 252” and the “vane rotor 262” according to the embodiment are examples of the “first rotating body” according to the present invention.
- the “housing 251” and “housing 261” according to the embodiment are examples of the “second rotating body” according to the present invention.
- the “oil control valve 27” and the “oil control valve 28” according to the embodiment are examples of the “rotation phase changing unit” according to the present invention.
- “ECU 30” according to the embodiment is an example of “advance control start means” and “retard control start means” according to the present invention.
- FIG. 9 an example of the shear force applied to each of the retard lock pin and the advance lock pin in the 4-cylinder engine is shown.
- FIG. 9 The period A in FIG. 9 and the period B in FIG. 9 are only shortened, and the above-described control itself is not changed.
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Abstract
Description
実施形態に係るエンジンの構成について、図1を参照して説明する。図1は、実施形態に係るエンジンの構成を示すブロック図である。
次に、吸気側の可変バルブタイミング機構の構成について、図2を参照して説明を加える。図2は、実施形態に係る吸気側の可変バルブタイミング機構の要部を示す図である。
次に、以上のように構成されたバルブタイミング制御装置100が、吸気側の可変バルブタイミング機構に対して実施する制御処理について、図6及び図7のフローチャートを参照して説明する。図6は、吸気弁14の開閉タイミングの進角量の演算処理を示すフローチャートであり、図7は、オイルコントロールバルブ27に係る制御処理を示すフローチャートである。
次に、排気側の可変バルブタイミング機構の構成について、図8を参照して説明を加える。図8は、図2と同趣旨の、実施形態に係る排気側の可変バルブタイミング機構の要部を示す図である。
Claims (5)
- 内燃機関の吸気弁及び排気弁の少なくとも一方を開閉駆動するカムシャフトの回転に同期して回転すると共に複数のベーンを有する第1回転体と、前記内燃機関のクランクシャフトの回転に同期して回転すると共に、夫々前記複数のベーンに対応し、前記複数のベーン各々の可動範囲を規定する複数の凹部を有する第2回転体と、少なくとも前記内燃機関の停止時に、前記複数のベーン各々が対応する凹部の一方の端部に接するように前記第1回転体及び前記第2回転体を互いに係合するロック機構と、前記複数の凹部各々が対応するベーンで区画されることによって前記対応するベーンの少なくとも一方の側に形成された液室に係る液圧を制御して、前記クランクシャフトに対する前記カムシャフトの相対回転位相を変更可能な回転位相変更手段と、を備えるバルブタイミング制御装置であって、
前記内燃機関の始動時、且つ前記吸気弁又は前記排気弁に係るバルブリフト量が増加している時に、前記相対回転位相を進角側へ制御開始する進角制御開始手段、及び前記内燃機関の始動時、且つ前記吸気弁又は前記排気弁に係るバルブリフト量が減少している時に、前記相対回転位相を遅角側へ制御開始する遅角制御開始手段、のうち少なくとも一方を更に備える
ことを特徴とするバルブタイミング制御装置。 - 前記ロック機構は、前記内燃機関の停止時に、最遅角位置として、前記複数のベーン各々が対応する凹部の一方の端部に接するように前記第1回転体及び前記第2回転体を互いに係合し、
当該バルブタイミング制御装置は、前記進角制御開始手段を備える
ことを特徴とする請求項1に記載のバルブタイミング制御装置。 - 前記ロック機構は、前記内燃機関の停止時に、最進角位置として、前記複数のベーン各々が対応する凹部の一方の端部に接するように前記第1回転体及び前記第2回転体を互いに係合し、
当該バルブタイミング制御装置は、前記遅角制御開始手段を備える
ことを特徴とする請求項1に記載のバルブタイミング制御装置。 - 前記進角制御開始手段は、前記内燃機関の始動時、且つ前記吸気弁又は前記排気弁に係るバルブリフト量が増加している時に、前記ロック機構による前記第1回転体及び前記第2回転体の係合が解除されるように、前記相対回転位相を進角側へ制御開始することを特徴とする請求項1に記載のバルブタイミング制御装置。
- 前記遅角制御開始手段は、前記内燃機関の始動時、且つ前記吸気弁又は前記排気弁に係るバルブリフト量が減少している時に、前記ロック機構による前記第1回転体及び前記第2回転体の係合が解除されるように、前記相対回転位相を遅角側へ制御開始することを特徴とする請求項1に記載のバルブタイミング制御装置。
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US14/370,602 US9441507B2 (en) | 2012-01-12 | 2012-01-12 | Valve timing control apparatus |
DE112012005652.3T DE112012005652B4 (de) | 2012-01-12 | 2012-01-12 | Ventilzeitabstimmungssteuerungsgerät |
CN201280062906.5A CN104024605B (zh) | 2012-01-12 | 2012-01-12 | 配气相位正时控制装置 |
JP2013553146A JP5817845B2 (ja) | 2012-01-12 | 2012-01-12 | バルブタイミング制御装置 |
PCT/JP2012/050496 WO2013105247A1 (ja) | 2012-01-12 | 2012-01-12 | バルブタイミング制御装置 |
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PCT/JP2012/050496 WO2013105247A1 (ja) | 2012-01-12 | 2012-01-12 | バルブタイミング制御装置 |
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JP (1) | JP5817845B2 (ja) |
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Cited By (1)
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JPWO2015015824A1 (ja) * | 2013-07-31 | 2017-03-02 | アイシン精機株式会社 | 内燃機関の制御装置 |
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JP6070669B2 (ja) * | 2014-10-02 | 2017-02-01 | トヨタ自動車株式会社 | エンジン停止装置 |
JP7211302B2 (ja) * | 2019-08-22 | 2023-01-24 | 株式会社デンソー | バルブタイミング調整装置 |
CN114060116A (zh) * | 2020-08-04 | 2022-02-18 | 深圳臻宇新能源动力科技有限公司 | 可变气门正时组件、油液系统以及车辆 |
US11396831B2 (en) * | 2021-04-30 | 2022-07-26 | Borgwarner, Inc. | Advance locked spool valve pump phaser with hydraulic detent valve |
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CN104024605A (zh) | 2014-09-03 |
DE112012005652T5 (de) | 2014-11-06 |
JPWO2013105247A1 (ja) | 2015-05-11 |
JP5817845B2 (ja) | 2015-11-18 |
US9441507B2 (en) | 2016-09-13 |
CN104024605B (zh) | 2016-07-06 |
DE112012005652B4 (de) | 2018-05-30 |
US20140352639A1 (en) | 2014-12-04 |
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