JP2015190606A - Parking device and method for diagnosing of motion restricting unit at parking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a parking device that can understood in advance whether or not a motion restricting unit for restricting a motion in the first direction of a motion member and releasing restriction of the motion member for changing-over a parking lock state and a parking lock releasing state is normal while being moved in the first direction.SOLUTION: This invention comprises the steps of setting a parking lock released state, a vehicle is being stopped, an engine is being operated, a request for stopping the engine is not required, a brake-on state is kept and an accelerator-off is kept (S100 to S140); judging that a diagnosis condition is established, a magnetic lock device is kept ON (a state in which a motion of a piston rod can be restricted), operating oil in an oil chamber of a hydraulic actuator is discharged (S150, S160); and diagnosing whether or not the magnetic lock device is normal in response to whether or not a parking lock released state is held (S180 to S200). Then, after diagnosing, the operating oil is supplied to the oil chamber to move the piston rod toward the lock releasing side (S230).

Description

  The present invention relates to a parking device and a method for diagnosing a movement restriction unit in the parking device, and more specifically, a parking mechanism that is mounted on a vehicle and switches between a parking lock state and a parking lock release state by elastic force and hydraulic pressure, and hydraulic oil. A parking device comprising hydraulic fluid supply / discharge means for supplying / discharging to / from the parking mechanism, and movement of the moving member in the first direction by moving in the first direction to switch between the parking lock state and the parking lock release state in the parking device The present invention relates to a method for diagnosing a movement restriction unit that restricts and releases restrictions.

  Conventionally, this type of parking device includes a piston unit that is movable in the axial direction within the housing, is urged in the parking lock execution direction by a spring device, and is operated in the parking lock release direction by hydraulic pressure, and three A latch mechanism that can hold the piston unit at a predetermined axial position, and a tripping member that is movable with the piston unit within the housing and is biased toward the piston unit by the spring. There has been proposed one provided with a locking mechanism having an electromagnetic operating device that is arranged coaxially with the piston unit and operates a tripping member (see, for example, Patent Document 1).

  In this parking device, when the piston unit moves to the tripping member side by hydraulic pressure, the tripping member pressed by the piston unit moves to the electromagnetic operating device side against the elastic force (biasing force) of the spring, and the piston unit And the latch mechanism are engaged. The parking lock is released in this state, and the release state of the parking lock can be maintained by energizing the electromagnetic operating device and fixing the position of the tripping member. In addition, when energization of the electromagnetic operating device is stopped when no hydraulic pressure is applied to the piston unit, the tripping member moves to the piston unit side by the elastic force of the spring, and the three spring arms are pushed and spread. The engagement between the mechanism and the piston unit is released. Then, the piston unit is moved away from the electromagnetic operating device by the elastic force or hydraulic pressure of the spring device, and parking lock is executed.

Special table 2009-520163

  In a vehicle equipped with such a parking device, if an abnormality occurs in the electromagnetic operating device, tripping member, latch mechanism, etc., the piston unit is fixed at the parking lock release side position when no hydraulic pressure is applied to the piston unit. There are cases where it is impossible. Until now, such an abnormality of the locking mechanism was detected when the parking lock state was unintentionally formed, such as when the engine was idle stopped, but in order to ensure safety, It is preferable to know in advance whether or not the locking mechanism is normal.

  The parking device and the method for diagnosing the movement restricting unit in the parking device according to the present invention perform the restriction and release of the movement in the first direction of the moving member that moves in the first direction and switches between the parking lock state and the parking lock release state. The main purpose is to make it possible to know in advance whether the movement restriction unit is normal or not.

  The parking apparatus and the method for diagnosing the movement restriction unit in the parking apparatus of the present invention employ the following means in order to achieve the main object described above.

The parking apparatus of the present invention
A parking mechanism that is mounted on a vehicle and switches between a parking lock state and a parking lock release state by elastic force and hydraulic pressure, hydraulic oil supply / discharge means that supplies / discharges hydraulic oil to / from the parking mechanism, the parking mechanism, and the hydraulic oil A parking device comprising a control means for controlling the supply / discharge means,
The parking mechanism is
A moving member that moves in a first direction; a first elastic member that urges the moving member toward a lock side that forms the parking lock state in the first direction by elastic force; A movable member and a casing forming a hydraulic oil chamber, and the movable member forms the parking lock release state in the first direction by hydraulic pressure supplied from the hydraulic oil supply / discharge means to the hydraulic oil chamber. A hydraulic unit that moves to the unlocking side,
A movement restricting unit that restricts movement of the moving member in the first direction and releases the restriction;
With
The control means restricts movement of the moving member to the lock side by the movement restricting unit when the parking lock is released, the vehicle is stopped, and a predetermined diagnosis condition that the driver does not intend to travel is satisfied. The hydraulic oil is discharged from the hydraulic oil chamber by the hydraulic oil supply / discharge means, and whether or not the movement restriction unit is normal is determined by whether or not the parking lock release state is maintained. Later, hydraulic oil is supplied to the hydraulic oil chamber by the hydraulic oil supply / discharge means.
It is characterized by that.

  In the parking device according to the present invention, when the parking lock is released, the vehicle is stopped, and a predetermined diagnosis condition that the driver does not intend to travel is satisfied, the movement restriction unit restricts the movement of the moving member to the lock side. The hydraulic oil is discharged from the hydraulic oil chamber by the hydraulic oil supply / discharge means (hereinafter referred to as “regulatory discharge processing”), and whether or not the movement restriction unit is normal depending on whether or not the parking lock release state is maintained. After the diagnosis, hydraulic oil is supplied to the hydraulic oil chamber by the hydraulic oil supply / discharge means. When the regulation discharge process is performed when the predetermined diagnosis condition is established, if the movement regulation unit is normal, the moving member does not move to the lock side, and the parking lock release state is maintained. On the other hand, if the movement restricting unit is abnormal, the moving member moves to the lock side by the elastic force of the first elastic member, and a parking lock state is formed. Therefore, this method can diagnose whether the movement restriction unit is normal. As a result, whether or not the movement regulating unit is normal (before the hydraulic oil is not supplied to the hydraulic oil chamber but the parking lock release state needs to be maintained, for example, the shift lever is Can be grasped before the idle stop of the prime mover for operating the pump for pumping the hydraulic oil to the hydraulic oil supply / discharge means. After the diagnosis, by supplying the hydraulic oil to the hydraulic oil chamber, the parking lock release state can be formed not only when the movement restriction unit is normal but also when it is abnormal, and subsequent driving can be resumed Can be.

The method for diagnosing the movement restriction unit in the parking device of the present invention is as follows.
A parking mechanism that is mounted on a vehicle and switches between a parking lock state and a parking lock release state by elastic force and hydraulic pressure; and a hydraulic oil supply / discharge unit that supplies / discharges hydraulic oil to / from the parking mechanism, and the parking mechanism includes: A moving member that moves in a first direction and an elastic force that house the moving member and the first elastic member that urges the moving member toward the lock side that forms the parking lock state in the first direction and the moving member And a casing that forms a hydraulic oil chamber, and the movable member forms the parking lock release state in the first direction by the hydraulic pressure supplied from the hydraulic oil supply / discharge means to the hydraulic oil chamber. A hydraulic unit that moves to the side, and a movement restriction unit that restricts movement of the moving member in the first direction and releases the restriction. Method of diagnosing a movement restricting unit in the ring system,
When the parking lock is released, the vehicle is stopped, and a predetermined diagnostic condition is established that the driver does not intend to travel, the operation is performed with the movement restriction unit restricting movement of the moving member to the lock side. The hydraulic oil is discharged from the hydraulic oil chamber by an oil supply / discharge means, and whether or not the movement restriction unit is normal is determined by whether or not the parking lock release state is maintained. Hydraulic oil is supplied to the hydraulic oil chamber by supply and discharge means;
It is characterized by that.

  In the method for diagnosing the movement restricting unit in the parking apparatus of the present invention, when the predetermined lock condition is established when the parking lock is released, the vehicle is stopped, and the driver does not intend to travel, the moving restricting unit detects the moving member. The hydraulic oil in the hydraulic oil chamber is discharged by the hydraulic oil supply / discharge means with the restriction of movement to the lock side (hereinafter referred to as restriction discharge processing), and the movement moves depending on whether or not the parking lock release state is maintained. Whether the regulation unit is normal is diagnosed, and after the diagnosis, the hydraulic oil is supplied to the hydraulic oil chamber by the hydraulic oil supply / discharge means. When the regulation discharge process is performed when the predetermined diagnosis condition is established, if the movement regulation unit is normal, the moving member does not move to the lock side, and the parking lock release state is maintained. On the other hand, if the movement restricting unit is abnormal, the moving member moves to the lock side by the elastic force of the first elastic member, and a parking lock state is formed. Therefore, this method can diagnose whether the movement restriction unit is normal. As a result, whether or not the movement regulating unit is normal (before the hydraulic oil is not supplied to the hydraulic oil chamber but the parking lock release state needs to be maintained, for example, the shift lever is Can be grasped before the idle stop of the prime mover for operating the pump for pumping the hydraulic oil to the hydraulic oil supply / discharge means. After the diagnosis, by supplying the hydraulic oil to the hydraulic oil chamber, the parking lock release state can be formed not only when the movement restriction unit is normal but also when it is abnormal, and subsequent driving can be resumed Can be.

1 is a configuration diagram illustrating an outline of a configuration of an automobile 10 including a parking device as an embodiment of the present invention. FIG. 2 is a configuration diagram showing an outline of the configuration of a power transmission device 20. 2 is a configuration diagram showing an outline of a configuration of a main part of a power transmission device 20. FIG. 4 is an explanatory diagram for explaining the operation of the parking device 30. FIG. 4 is an explanatory diagram for explaining the operation of the parking device 30. FIG. 3 is a flowchart showing an example of a magnetic lock device diagnosis routine executed by a shift ECU 21.

  Next, the form for implementing this invention is demonstrated, referring drawings.

  FIG. 1 is a configuration diagram showing an outline of the configuration of an automobile 10 provided with a parking device as an embodiment of the present invention, and FIG. 2 is a configuration diagram showing an outline of the configuration of a power transmission device 20. These are the block diagrams which show the outline of a structure of the principal part of the power transmission device 20. FIG.

  The automobile 10 of the present embodiment is configured as a rear wheel drive vehicle, and as shown in FIG. 1, an engine 12 as a prime mover and an engine electronic control unit (hereinafter referred to as an engine ECU) 14 for controlling the engine 12. A brake electronic control unit (hereinafter referred to as a brake ECU) 15 for controlling an electronically controlled hydraulic brake unit (not shown), and power for transmitting the power from the engine 12 to the drive wheel (rear wheel) DW via the differential gear. And a transmission device 20. The engine ECU 14, the brake ECU 15, and the shift electronic control unit (hereinafter referred to as a shift ECU) 21 of the power transmission device 20 are connected to each other via a communication port, and various control signals and data necessary for the control. We are exchanging.

  Although not shown, the engine ECU 14 is configured as a microprocessor centered on a CPU, and includes a ROM for storing a processing program, a RAM for temporarily storing data, an input / output port, and a communication port in addition to the CPU. . The engine ECU 14 controls driving of the engine 22 by the accelerator pedal position sensor 92 for detecting the depression amount (operation amount) of the accelerator pedal 91 and the vehicle speed V from the vehicle speed sensor 98 for detecting the vehicle speed. Necessary signals from various sensors are input via the input port. Various control signals for controlling the operation of the engine 12 are output from the engine ECU 14 through an output port.

  Although not shown, the brake ECU 15 is configured as a microprocessor centered on a CPU, and includes a ROM for storing a processing program, a RAM for temporarily storing data, an input / output port, and a communication port in addition to the CPU. . The brake ECU 15 receives a master cylinder pressure from a master cylinder pressure sensor 94 that detects a master cylinder pressure (depressing force of the brake pedal 93), a vehicle speed V from a vehicle speed sensor 98, and the like via an input port. From the brake ECU 15, a drive signal to the brake actuator of the electronically controlled hydraulic brake unit is output from the brake ECU 15 via the output port.

  The power transmission device 20 includes a transmission case 22, a starting device (fluid transmission device) 23, an oil pump 24, an automatic transmission 25, a parking mechanism 30, a hydraulic control device 70, and a transmission ECU 21 that controls them. .

  The starting device 23 is disposed inside the input-side pump impeller connected to the crankshaft of the engine 12, the output-side turbine runner connected to the input shaft (input member) of the automatic transmission 25, the pump impeller, and the turbine runner. The torque converter includes a stator that is arranged to rectify the flow of hydraulic oil from the turbine runner to the pump impeller, a one-way clutch that restricts the rotational direction of the stator to one direction, a lock-up clutch, a damper mechanism, and the like. The starting device may be configured as a fluid coupling that does not have a stator.

  The oil pump 24 is a gear pump (mechanical type) having a pump assembly including a pump body and a pump cover, an external gear connected to a pump impeller of a starting device via a hub, an internal gear meshing with the external gear, and the like. Oil pump). The oil pump 24 is operated by power from the engine 12, sucks hydraulic oil (ATF) stored in a hydraulic oil storage unit (not shown), and pumps it to the hydraulic control device 70.

  The automatic transmission 25 is configured as a multi-stage transmission such as a 4-speed transmission, a 5-speed transmission, or a 6-speed transmission, and includes an input shaft (input member), an output shaft (output member), and a plurality of planetary gears. , It has a plurality of engagement elements (clutch and brake) for changing the power transmission path from the input shaft to the output shaft. The clutch includes a piston, a plurality of friction engagement plates (for example, a friction plate formed by sticking a friction material on both surfaces of an annular member and a separator plate that is an annular member formed smoothly on both surfaces), and hydraulic oil. It is configured as a multi-plate friction type hydraulic clutch (friction engagement element) having a hydraulic servo constituted by a supplied engagement oil chamber, a centrifugal hydraulic pressure cancellation chamber, and the like. The brake is configured as a multi-plate friction type hydraulic brake having a hydraulic servo including a piston, a plurality of friction engagement plates (friction plates and separator plates), an engagement oil chamber to which hydraulic oil is supplied, and the like. Yes. The engaging elements (clutch and brake) operate by receiving and supplying hydraulic oil from the hydraulic control device 70.

  The parking mechanism 30 locks any rotating shaft (output shaft or a rotating shaft connected thereto) of the automatic transmission 25 according to the operation position (shift position) of the shift lever 95 (performs parking lock). This is configured as a so-called shift-by-wire parking mechanism that unlocks the rotation shaft (releases the parking lock).

  As shown in FIGS. 2 and 3, the parking mechanism 30 includes a plurality of teeth 32 a and a parking gear 32 that is attached to any rotation shaft of the automatic transmission 25, and a protrusion that can be engaged with the parking gear 32. A parking pole 33 that has a spring 33a and is biased away from the parking gear 32 by a spring (not shown), a parking rod 34 that can move forward and backward, and a cylindrical cam member 35 that can move in the axial direction of the parking rod 34. For example, a support roller 36 that is rotatably supported by a transmission case and sandwiches the cam member 35 together with the parking pole 33, and a cam member that is supported at one end by the parking rod 34 and presses the parking pole 33 against the parking gear 32. Cam spring 37 for urging 35; -Detent lever 38 coupled to the king rod 34, hydraulic actuator 40 for moving the parking rod 34 forward and backward through the detent lever 38 by the forward and backward movement (moving up and down in the figure) of the piston rod 42, and forward and backward movement of the piston rod 42 And a magnetic lock device 50 that restricts the forward and backward movement of the parking rod 34 by restricting In the parking mechanism 30, as shown in the figure, the protrusion 33a of the parking pole 33 is engaged with the recess between two adjacent teeth 32a of the parking gear 32, so that the rotation shaft of the transmission is locked ( Parking lock is performed).

  The parking gear 32, the parking pole 33, the parking rod 34, the cam member 35, the support roller 36, and the cam spring 37 all have a known configuration. The detent lever 38 is formed in a substantially L shape and has a first free end 38a and a second free end 38b. The first free end 38a is rotatably connected to the base end (right end in the figure) of the parking rod 34. The second free end 38b is formed with an engaging recess 38r that can engage with an engaging member 39 attached to a detent spring (not shown) supported by, for example, a transmission case. A corner portion of the detent lever 38 (base end portions of the first and second free end portions 38a and 38b) is rotatably supported by a support shaft 38s supported by, for example, a transmission case.

  When the piston rod 42 of the hydraulic actuator 40 moves upward in the drawing (hereinafter referred to as “unlocking side” as appropriate), the detent lever 38 rotates clockwise around the support shaft 38s in FIG. It moves to the right side in FIG. Then, the parking rod 34 moves to the right side in FIG. 2, so that the pressing of the parking pole 33 by the cam member 35 is released, the engagement between the parking gear 32 and the parking pole 33 is released, and the automatic transmission 25 rotates. The shaft is unlocked (parking lock is released). On the other hand, when the piston rod 42 moves downward in the figure (hereinafter referred to as “lock side”), the detent lever 38 rotates around the support shaft 38s counterclockwise in FIG. 2 and the parking rod 34 changes to FIG. Move to the middle left. Then, as the parking rod 34 moves to the left side in FIG. 2, the parking pole 33 is pressed by the cam member 35 biased by the cam spring 37 so as to engage with the parking gear 32, and the automatic transmission 25 rotates. The shaft is locked (parking lock is executed). The engagement recess 38r of the second free end 38b of the detent lever 38 and the engagement member 39 engage with each other, so that the rotation of the detent lever 38 around the support shaft 38s is restricted to some extent by a detent spring (not shown). Thereby, the movement of the parking rod 34 is also restricted to some extent.

  As shown in FIG. 3, the hydraulic actuator 40 is connected to a case 41 as a housing composed of a plurality of members and a second free end portion 38 b of the detent lever 38 and is axially moved by the case 41 (FIG. 3). A piston rod 42 as a moving member supported movably in the middle and up and down directions) and a piston 44 fixed to the piston rod 42 and disposed in a piston chamber 41p formed in the case 41 are provided.

  The piston rod 42 is supported by the case 41 so that the tip end portion (the upper end portion in FIG. 3) protrudes from the case 41 to the outside. A connecting concave portion 42r extending from the distal end side toward the proximal end side is formed at the distal end portion of the piston rod 42, and the second free end portion 38b of the detent lever 38 is inserted into the connecting concave portion 42r. Yes. A hole 38h is formed in the detent lever 38 so as to be positioned in the connection recess 42r, and a connection pin 42p supported by the tip of the piston rod 42 is inserted into the hole 38h. Thereby, the piston rod 42 and the detent lever 38 are connected.

  Further, a hole 42h that penetrates the piston rod 42 in a direction perpendicular to the axial direction (left and right direction in FIG. 3) and extends in the axial direction is formed near the central portion of the piston rod 42 in the axial direction. A roller 43 as a contacted portion is disposed inside the hole portion 42h. The roller 43 is configured as a roller bearing, and has an outer diameter smaller than the length of the hole 42h in the longitudinal direction (vertical direction in FIG. 3). The roller 43 is supported so as to be rotatable in the hole 42h by a support shaft 42s supported by the piston rod 42 so as to extend in parallel with the connecting pin 42p.

  The piston 44 is fixed to the base end portion (lower end portion in FIG. 3) of the piston rod 42, and is supported by the inner wall surface of the piston chamber 41p via the seal member 45 so as to be movable in the axial direction of the piston rod 42. The piston 44 partitions the interior of the piston chamber 41p into a spring chamber 41s and an oil chamber 41f. The spring chamber 41s is defined on the upper side in FIG. 3 of the piston chamber 41p so as to be close to the tip of the piston rod 42 and the detent lever 38. A return spring 46 as an elastic member is disposed in the spring chamber 41s so as to be positioned between the case 41 and the piston 44, and the piston 44 is locked by the return spring 46 (the lower side in FIG. 3). ). The oil chamber 41f is defined on the lower side in FIG. 3 of the piston chamber 41p so as to be separated from the tip end portion (upper end portion in FIG. 3) of the piston rod 42 and the detent lever 38, and an oil hole 41h formed in the case 41. It communicates with the hydraulic control device 70 via. The piston rod 42 and the piston 44 are moved to the lock release side (upper side in the figure) against the urging force of the return spring 46 by hydraulic oil (hydraulic pressure) supplied from the hydraulic control device 70 to the oil chamber 41f.

  As shown in FIG. 3, the magnetic lock device 50 includes a lock shaft 51 having a contact portion 510 that can come into contact with a roller 43 as a contact portion provided on the piston rod 42, and linear movement of the lock shaft 51. A shaft holder 55 that is movably supported in the axial direction (left-right direction in FIG. 3) via a bearing 57, and a magnetic part 60 that can lock the lock shaft 51 by magnetic force are provided.

  The lock shaft 51 is made of a non-magnetic material such as stainless steel, and has a small diameter portion 52 having a contact portion 510 at one end (tip portion), and extends from the small diameter portion 52 to the opposite side of the contact portion 510. And a large-diameter portion 53 having a larger diameter than the small-diameter portion 52. The small-diameter portion 52 is formed in a substantially cylindrical shape, and the contact portion 510 formed at the tip portion is formed to have a two-sided width shape. The contact portion 510 is located in the hole portion 42 h of the piston rod 42 and overlaps at least a part of the outer peripheral surface of the roller 43 when viewed from the axial direction (vertical direction in FIG. 3) of the piston rod 42. . The large diameter part 53 is formed in a substantially cylindrical shape.

  The abutting portion 510 of the small diameter portion 52 includes a first abutting surface 511 located on the lock side (lower side in FIG. 3) in the moving direction (vertical direction in the drawing) of the piston rod 42 and the moving direction of the piston rod 42. And a second contact surface 512 located on the unlocking side (upper side in FIG. 3). The first contact surface 511 is formed in an inclined shape that approaches the lock side from the contact portion 510 side toward the large-diameter portion 53 side, and specifically, the radius (curvature radius) of the outer peripheral surface of the roller 43. It has a smaller radius of curvature and is formed as a curved surface having an arcuate cross section that protrudes toward the lock side. The second contact surface 512 is formed in an inclined shape that approaches the lock release side as it goes from the contact portion 510 side to the large diameter portion 53 side. Specifically, the second contact surface 512 is inclined at a certain angle toward the lock release side ( It is formed as a flat surface.

  The magnetic unit 60 holds a shaft member 61 that can move in the axial direction (left-right direction in the drawing), a coil 64 that is disposed so as to surround the outer periphery of the shaft member 61, and a shaft holder 55, and the shaft member 61 and the coil. A yoke 65 functioning as a case for housing 64, a core 66 disposed between the shaft member 61 and the coil 64, and a coil 64 and a core 66 are mounted on the right end of the yoke 65 in FIG. And a spring 68 as an elastic member that is disposed between the shaft member 61 and the rear cap 67 and biases the shaft member 61 toward the piston rod 42 (left side in FIG. 3).

  The shaft member 61 has a plunger 62 made of a magnetic material such as iron, and has the same outer diameter as the plunger 62 and is fixed to one end side (left end side in FIG. 3) of the plunger 62 in the axial direction (plunger 62). And an annular permanent magnet 63 (integrally constructed). Due to the annular permanent magnet 63, the shaft member 61 has a recess 61a on one end side in the axial direction. The large diameter portion 53 of the lock shaft 51 is inserted into the recess 61a. The coil 64 has a terminal connected to a connector (not shown) attached to a yoke 65 as a case. A current is applied to the coil 64 from an auxiliary battery of a vehicle (not shown) via a power supply circuit 69 controlled by the transmission ECU 21 and a connector. The yoke 65 is made of a magnetic material such as iron, and has a flange portion 65a protruding radially inward on one end side (left end side in the drawing). The flange portion 65a has an inner diameter with which the small-diameter portion 52 of the lock shaft 51 can slide, and faces the large-diameter portion 53 of the lock shaft 51 and the permanent magnet 63 of the shaft member 61 in the left-right direction in FIG. The spring 68 has a spring constant (rigidity) smaller than that of the return spring 46 of the hydraulic actuator 40, and urges the lock shaft 51 and the shaft member 61, which are not fixed to each other, toward the piston rod 42 (left side in the figure). When the external force on the rear cap 67 side (right side in the figure) larger than the biasing force (elastic force) acts on the lock shaft 51, the lock shaft 51 and the shaft member 61 are allowed to move to the rear cap 67 side. To do.

  When the coil 64 is not energized, the magnetic locking device 50 uses the attractive force (and the elastic force of the spring 68) between the permanent magnet 63 of the shaft member 61 and the flange portion 65a of the yoke 65 to lock the lock shaft 51 and the shaft member 61. The (plunger 62 and permanent magnet 63) are urged and locked together on the shaft holder 55 side (left side in FIG. 3). This restricts the movement of the piston rod 42 in the vertical direction in FIG. 3 when the roller 43 of the piston rod 42 contacts the contact portion 510 of the lock shaft 51. On the other hand, when the coil 64 is energized, the attractive force between the permanent magnet 63 and the flange portion 65a is canceled by the magnetic flux passing through the yoke 65, the permanent magnet 63, the plunger 62, and the core 66, and is locked from the roller 43 of the piston rod 42. When a force is applied to the abutting portion 510 of the shaft 51, the lock shaft 51 and the shaft member 61 are allowed to move toward the rear cap 67 by the component of the force in the right direction in FIG. Thereby, the piston rod 42 is allowed to move in the vertical direction in FIG. Hereinafter, when the coil 64 is not energized (a state in which the movement of the piston rod 42 can be regulated) is turned on, the magnetic lock device 50 is turned on, and when the coil 64 is energized (a state in which the piston rod 42 is allowed to move) is magnetically locked. The device 50 is turned off.

  As shown in FIG. 3, the hydraulic control device 70 is connected to the oil pump 24, and controls the valve body and the primary regulator valve 72 that regulates the hydraulic oil from the oil pump 24 to generate the line pressure PL, and the line pressure PL. A modulator valve that regulates pressure to generate a substantially constant modulator pressure Pmod, and a plurality of linear pressures that regulate the line pressure PL according to the current applied to the solenoid and generate hydraulic pressure to the corresponding engagement elements (clutch and brake). A solenoid valve 74, a switching valve 76 for switching between a first state in which hydraulic oil (line pressure PL) is supplied to the oil chamber 41f through the oil hole 41h and a second state in which the hydraulic oil in the oil chamber 41f is discharged (drained). Is provided.

  Although not shown, the transmission ECU 21 is configured as a microprocessor centered on a CPU, and includes a ROM for storing a processing program, a RAM for temporarily storing data, an input / output port, and a communication port in addition to the CPU. . The shift ECU 21 receives the accelerator opening Acc from the accelerator pedal position sensor 92 and the shift position SP from the shift position sensor 96 for detecting the operation position of the shift lever 95, the vehicle speed V from the vehicle speed sensor 98, and the input of the automatic transmission 25. An input rotational speed from a rotational speed sensor that detects the rotational speed of the shaft, an output rotational speed from a rotational speed sensor that detects the rotational speed of the output shaft of the automatic transmission 25, and a rotational position detection that detects the rotational position of the detent lever 38 A rotational position θ of the detent lever 38 from a sensor (for example, a magnetic sensor) 38rp is input via an input port. The shift ECU 21 outputs a drive control signal to the hydraulic control device 70, a drive control signal to the power supply circuit 69, an output signal to the warning lamp 99, and the like via an output port. In the present embodiment, the operation position of the shift lever 95 (shift position SP detected by the shift position sensor 96) includes a parking position (P position) used during parking, a reverse position (R position) for reverse travel, There are neutral position (N position) and forward drive position (D position).

  In the present embodiment, the “parking device” corresponds to the parking mechanism 30, the hydraulic control device 70, and the transmission ECU 21.

  Next, the operation of the parking device of this embodiment will be described.

  When the shift lever 95 is in the parking position, the transmission ECU 21 sets the switching valve 76 of the hydraulic control device 70 to the second state. As a result, the line pressure PL is not supplied to the oil chamber 41f of the hydraulic actuator 40. For this reason, the piston 44 of the hydraulic actuator 40 is urged toward the lock side (lower side in FIG. 3) by the elastic force of the return spring 46 and comes close to or comes into contact with the bottom of the case 41. In this case, the state shown in FIG. 3 is obtained, and the parking lock state is formed. In the present embodiment, at this time, a first predetermined interval is formed between the roller 43 and the first contact surface 511 of the lock shaft 51. At this time, the speed change ECU 21 does not energize the coil 64 by the power supply circuit 69 and turns on the magnetic lock device 50 (a state in which the movement of the piston rod 42 can be regulated). Thereby, the power consumption in the coil 64 can be suppressed.

  In the state of FIG. 3, when the shift lever 95 is operated from the parking position to the travel position when the engine 12 is operating (when the oil pump 24 is operating), the transmission ECU 21 causes the power supply circuit 69 to switch the coil 64. Energization is performed to turn off the magnetic lock device 50 (a state in which the movement of the piston rod 42 is allowed), and the switching valve 76 is set to the first state. When the switching valve 76 is in the first state, the line pressure PL is supplied to the oil chamber 41f of the hydraulic actuator 40, and the piston rod 42 and the piston 44 are unlocked against the urging force of the return spring 46 by the hydraulic pressure. (Upper side in FIG. 3). The piston rod 42 and the piston 44 in FIG. 3 show the force acting on the first contact surface 511 from the roller 43 when the roller 43 of the piston rod 42 and the first contact surface 511 of the lock shaft 51 contact each other. While moving the lock shaft 51 and the shaft member 61 to the rear cap 67 side by the rightward component force, the lock shaft 51 and the shaft member 61 are further moved to the unlocking side, and as shown in FIG. 4, the roller 43 and the second contact surface 512 of the lock shaft 51 Stops at a position where the second predetermined interval is formed between the two. When the contact between the roller 43 and the first contact surface 511 is completed, the lock shaft 51 and the shaft member 61 are moved to the piston rod 42 side (left side in FIG. 3) by the urging force of the spring 68. When the piston rod 42 moves to the unlocking side in this manner, as described above, the detent lever 38 rotates clockwise around the support shaft 38s in FIG. 2 and the parking rod 34 moves to the right side in FIG. Then, the pressing of the parking pole 33 by the cam member 35 is released, and the parking lock release state is formed. When the parking lock release state is thus formed, the speed change ECU 21 does not energize the coil 64 by the power supply circuit 69 (ends energization of the coil 64) and turns on the magnetic lock device 50.

  Thereafter, in the state shown in FIG. 4, when the shift lever 95 is operated from the running position to the parking position while the vehicle is stopped, the transmission ECU 21 energizes the coil 64 by the power circuit 69 to turn off the magnetic lock device 50 (piston The switching valve 76 is set to the second state. When the switching valve 76 is in the second state, the hydraulic oil in the oil chamber 41f of the hydraulic actuator 40 is discharged through the switching valve 76, and the piston rod 42 and the piston 44 are locked by the urging force of the return spring 46 (see FIG. 4) Move down. The piston rod 42 and the piston 44 in FIG. 4 show the force acting on the second contact surface 512 from the roller 43 when the roller 43 of the piston rod 42 and the second contact surface 512 of the lock shaft 51 contact each other. The lock shaft 51 and the shaft member 61 are moved to the rear cap 67 side by the rightward component force, and further moved to the lock side. As shown in FIG. 3, the roller 43 and the first contact surface 511 of the lock shaft 51 are moved. Stop at a position where a first predetermined interval is formed between them. When the contact between the roller 43 and the second contact surface 512 is completed, the lock shaft 51 and the shaft member 61 move to the piston rod 42 side (left side in FIG. 4) by the biasing force of the spring 68. When the piston rod 42 moves to the lock side in this way, the detent lever 38 rotates counterclockwise in FIG. 2 around the support shaft 38s and the parking rod 34 moves to the left side in FIG. The parking pawl 33 is pressed by the cam member 35 biased by 37 so as to engage with the parking gear 32, and a parking lock state is formed.

  In the state shown in FIG. 4, when the shift lever 95 stops at the travel position and the engine 12 is idle stopped (automatic stop), the shift ECU 21 does not energize the coil 64 by the power supply circuit 69. The magnetic lock device 50 is turned on and the switching valve 76 is set to the second state. Note that at the time of idling stop, the oil pump 24 is also stopped, and hydraulic oil is not supplied from the oil pump 24 to the hydraulic control device 70. When the switching valve 76 is in the second state, the hydraulic oil in the oil chamber 41f of the hydraulic actuator 40 is discharged through the switching valve 76, and the piston rod 42 and the piston 44 are biased by the return spring 46 from the position shown in FIG. As a result, the roller 43 of the piston rod 42 and the second contact surface 512 of the lock shaft 51 come into contact with each other, as shown in FIG. The piston rod 42 and the piston 44 move to the lock side while moving the lock shaft 51 and the shaft member 61 to the rear cap 67 side by the rightward component in FIG. 4 of the force acting on the second contact surface 512 from the roller 43. However, since the magnetic lock device 50 is on, its movement is restricted. As a result, the parking lock release state is maintained. At this time, since it is not necessary to energize the coil 64, power consumption can be suppressed. In this embodiment, the condition that the engine coolant temperature is equal to or higher than the predetermined temperature, the condition that the road surface gradient is equal to or lower than the threshold value, the condition that the vehicle is stopped, the condition that the engine speed is equal to or lower than the predetermined speed, and the accelerator off. The automatic stop condition is satisfied when all of the conditions, the condition that the brake is on, the condition that the auxiliary battery voltage is equal to or higher than the predetermined voltage, and the condition that the temperature of the auxiliary battery is within the predetermined temperature range are satisfied. Judgment was made and idle stop was performed. Further, when the idle stop is performed, it is determined that the automatic restart condition is satisfied when at least one of the brake-off condition and the accelerator-on condition is satisfied, and the engine 12 is restarted. did. When the automatic restart condition of the engine 12 is satisfied, the engine 12 is started (restarted) with drive control of a starter (not shown), and the switching valve 76 is set to the first state and is pumped from the oil pump 24 to be sent to the primary regulator. The line pressure PL generated by the valve 72 is supplied to the oil chamber 41 f of the hydraulic actuator 40.

  Next, an operation when diagnosing whether or not the magnetic locking device 50 of the parking mechanism 30 of the parking device of the present embodiment is normal will be described. FIG. 6 is a flowchart showing an example of a magnetic lock device diagnosis routine executed by the transmission ECU 21. This routine is periodically executed when the shift lever 95 is in the traveling position and the parking mechanism 30 is in the parking lock release state (the state shown in FIG. 4).

  When the magnetic lock device diagnosis routine is executed, the transmission ECU 21 first determines whether or not a diagnosis condition for diagnosing the magnetic lock device 50 is satisfied (steps S100 to S140). In this embodiment, this determination is based on whether or not the vehicle is stopped (step S100), whether or not the engine 12 is operating (step S110), and whether or not a stop request for the engine 12 has been made (step S120). It is determined by determining whether the brake is on (step S130) and whether the accelerator is off (step S140). The process of step S100 is a process of determining whether or not there is no problem even if the parking lock state is formed at the time of diagnosis of the magnetic lock device 50. Moreover, the process of step S110, S120 is a process which determines whether oil_pressure | hydraulic can be supplied to the oil chamber 41f after the diagnosis of the magnetic locking device 50. FIG. An engine stop request may be an idle stop request. Further, the processes of steps S130 and S140 are processes for determining whether or not the driver has no intention of traveling (the vehicle has an intention of stopping).

  When the vehicle is not stopped (running), the engine 12 is not operating (stopped), the engine 12 is requested to stop, the brake is off, or the accelerator is on, the parking lock state is established. If there is a problem, it is determined that the diagnosis condition is not satisfied because it is impossible to supply hydraulic pressure to the oil chamber 41f after the diagnosis of the magnetic locking device 50 or the driver has an intention of traveling. This routine is finished as it is.

  When the vehicle is stopped, the engine 12 is operating, the engine 12 is not requested to stop, the brake is on, and the accelerator is off, there is no problem even if the parking lock state is formed, and the magnetic lock device 50 Since the hydraulic pressure can be supplied to the oil chamber 41f after the diagnosis and the driver does not intend to travel, it is determined that the diagnosis condition is satisfied, and the power supply circuit 69 does not energize the coil 64 and magnetically locks it. The device 50 is turned on (a state in which the movement of the piston rod 42 can be regulated) (step S150), the switching valve 76 is set to the second state, and the hydraulic oil in the oil chamber 41f of the hydraulic actuator 40 is passed through the switching valve 76. It is discharged (step S160).

  Then, after waiting for a predetermined time (for example, 500 msec, 800 msec, 1000 msec, etc.) required for the hydraulic oil in the oil chamber 41f to be discharged to some extent (step S170), whether or not the parking lock release state is maintained. Is determined (step S180). Here, whether or not the parking lock release state is maintained is determined by examining the rotational position θ of the detent lever 38 from the rotational position detection sensor 38rp and the rotational amount Δθ obtained based on the rotational position θ, or the position of the piston rod 42. It is possible to make a determination by attaching a sensor for detecting the position to the piston rod 42, the case 11, or the like and examining the position of the piston rod 42 from the sensor and the position change amount (stroke amount) obtained based on the position. it can. Now, considering that the magnetic locking device 50 is turned on, if the magnetic locking device 50 is normal, the piston rod 42 and the piston 44 are connected to the roller 43 and the lock shaft 51 as shown in FIG. 2 The movement to the lock side is restricted by the contact with the contact surface 512. As a result, the parking lock release state is maintained. On the other hand, if the magnetic locking device 50 is abnormal, the piston rod 42 and the piston 44 move to the lock side while moving the lock shaft 51 and the shaft member 61 to the rear cap 67 side by the urging force of the return spring 46. As shown in FIG. 3, the operation stops at a position where a first predetermined interval is formed between the roller 43 and the first contact surface 511 of the lock shaft 51. Thereby, a parking lock state is formed. Here, as an abnormality of the magnetic lock device 50, the lock shaft 51 is moved to the rear cap 67 side and caught on something, so that it does not return to the piston rod 42 side or for some reason, There may be an abnormality in which energization cannot be stopped and the magnetic lock device 50 cannot be turned on. In the process of step S180, for example, by determining whether or not the rotational position θ of the detent lever 38 is substantially equal to the rotational position when the roller 43 and the second contact surface 512 of the lock shaft 51 contact each other. Can be done.

  Therefore, when the parking lock release state is maintained, it is determined that the magnetic lock device 50 is normal (step S190). On the other hand, when the parking lock holding state is not held, it is determined that the magnetic lock device 50 is abnormal (step S200), it is determined that idling stop of the engine 12 is prohibited (step S210), and the warning lamp 99 is turned on (step S200). S220). By turning on the warning lamp 99, the driver can be notified of an abnormality in the magnetic lock device 50. When an abnormality occurs in the magnetic lock device 50 and the parking lock release state cannot be maintained, if the engine 12 is idle-stopped, the parking lock state is formed even though the shift lever 85 is in the traveling position. This causes inconvenience. On the other hand, such an inconvenience can be prevented by grasping the abnormality of the magnetic lock device 50 in advance (before performing idling stop of the engine 12) and prohibiting idling stop of the engine 12. . Further, by notifying the driver of the abnormality of the parking lock mechanism 30, some other measures can be taken.

  When it is determined (diagnostic) whether or not the magnetic locking device 50 is normal in this way, the switching valve 76 is set to the first state, and the line pressure PL that is pressure-fed from the oil pump 24 and generated by the primary regulator valve 72 is used as the hydraulic actuator 40. The piston rod 42 and the piston 44 are moved to the unlocking side (upper side in FIG. 3) (step S230), and this routine is finished. Accordingly, the parking lock release state can be held when the magnetic lock device 50 is normal by the hydraulic pressure supplied to the oil chamber 41f, and the parking lock release state is formed and held when the magnetic lock device 50 is abnormal. Can be resumed.

  In the parking apparatus of the present embodiment described above, when the shift lever 95 is in the travel position and the parking mechanism 30 is in the parking lock release state, the vehicle is stopped and the engine 12 is operating and the engine 12 is requested to stop. When the brake is on and the accelerator is off, it is determined that the diagnosis condition is satisfied, the magnetic lock device 50 is turned on (the movement of the piston rod 42 can be regulated), and the hydraulic actuator 40 is turned on. The hydraulic oil in the oil chamber 41f is discharged and whether or not the magnetic lock device 50 is normal is diagnosed based on whether or not the parking lock release state is maintained. Thereby, it can be grasped in advance (before the engine 12 is idle-stopped) whether or not the magnetic locking device 50 is normal. After the diagnosis, hydraulic oil is supplied to the oil chamber 41f and the piston rod 42 is moved to the lock release side. As a result, the parking lock release state can be formed not only when the magnetic lock device 50 is normal but also when it is abnormal, and the travel after diagnosis can be resumed.

  Further, in the parking device of the present embodiment, the magnetic locking device 50 is turned on when the coil 64 is not energized (a state in which the movement of the piston rod 42 can be regulated), and is turned off when the coil 64 is energized (the piston rod 42 A state in which movement is permitted). Accordingly, it is possible to suppress power consumption when the hydraulic lock is not supplied to the oil chamber 41f of the hydraulic actuator 40 and the parking lock release state is held by the magnetic lock device 50.

  Of course, in the parking device of the present embodiment, the hydraulic actuator 40 and the magnetic lock device 50 are arranged so that the axial direction of the piston rod 42 and the axial directions of the lock shaft 51 and the shaft member 61 are orthogonal to each other. Thereby, compared with the structure which arrange | positions both on the same axis | shaft, a parking apparatus can be easily arrange | positioned in the limited space inside or outside a transmission case.

  In the parking apparatus according to the present embodiment, it is determined that the driver does not intend to travel when the brake is on and the accelerator is off. However, for example, when the parking brake is operating, It may be determined that there is no intention of traveling.

  In the parking device of the present embodiment, whether or not the hydraulic pressure can be supplied to the oil chamber 41f after diagnosis of the magnetic lock device 50 is determined by whether or not the engine 12 is in operation and whether the engine 12 is stopped. However, it may be performed in consideration of whether the oil pump 24 and the switching valve 76 of the hydraulic control device 70 are normal.

  In the present embodiment, the oil pump 24 is configured as a mechanical oil pump that operates by power from the engine 12, but may be configured as an electric pump that operates by power from a motor. In this case, instead of the processing of steps S110 and S120 of the magnetic locking device diagnosis routine of FIG. 6, it is determined whether or not the oil pump (electric pump) or the switching valve 76 of the hydraulic control device 70 is normal. Alternatively, the processes of steps S110 and S120 may be simply not executed.

  In the parking device of the present embodiment, when the shift lever 95 is in the parking lock release state at the travel position, the vehicle is stopped, the engine 12 is operating, the engine 12 is not requested to stop, and the brake is When it is on and the accelerator is off, it is determined that the diagnosis condition is satisfied, the magnetic lock device 50 is turned on (a state in which the movement of the piston rod 42 can be regulated), and the hydraulic oil in the oil chamber 41f of the hydraulic actuator 40 is supplied. Whether or not the parking lock mechanism 30 is normal is diagnosed based on whether or not the parking lock release state is maintained by discharging through the switching valve 76. After the diagnosis, hydraulic oil is supplied to the oil chamber 41f and the piston is The rod 42 is moved to the unlocking side, but the shift lever 95 is moved from the driving position to the parking position. Whether or not the parking lock release state is maintained by turning on the magnetic lock device 50 and discharging the hydraulic oil in the oil chamber 41f of the hydraulic actuator 40 via the switching valve 76 when operated. It is possible to diagnose whether the parking lock mechanism 30 is normal or not and turn off the magnetic lock device 50 after the diagnosis so that a parking lock state is formed.

  In the parking apparatus according to the present embodiment, when the hydraulic actuator 40 switches from the parking lock release state to the parking lock state, the piston rod 42 and the piston 42 cause the lock shaft 51 and the shaft member 61 to move by the urging force of the return spring 46. Although it moves to the lock side while moving to the rear cap 67 side, hydraulic pressure (hydraulic oil) may be supplied from the hydraulic control device 70 to the spring chamber 41s of the hydraulic actuator 40 at this time. In this way, the piston rod 42 can be moved more quickly on the lock side.

  In the parking device of the present embodiment, the magnetic lock device 50 is locked by the attractive force (and the elastic force of the spring 68) between the permanent magnet 63 of the shaft member 61 and the flange portion 65a of the yoke 65 when the coil 64 is not energized. The shaft 51 is fixed to the piston rod 42 side to restrict the movement of the piston rod 42. When the coil 64 is energized, the lock shaft 51 is released by canceling the attractive force between the permanent magnet 63 and the flange portion 65a. Although the movement of the piston rod 42 is allowed, any configuration is possible as long as the movement of the piston rod 42 can be restricted and the restriction released (the movement can be permitted) by the elastic force and the magnetic force. For example, without using the permanent magnet 63, the plunger 62B having the same shape as the shaft member 61 described above is used, and when the coil 64 is not energized, the piston rod 42 is allowed to move without fixing the lock shaft 51. When the coil 64 is energized, the movement of the piston rod 42 may be restricted by sucking the plunger 62B toward the flange 65a of the yoke 65 and fixing the lock shaft 51 to the piston rod 42. Further, using the plunger 62C having the same shape as the plunger 62B, when the coil 64 is not energized, the movement of the piston rod 42 is restricted by fixing the lock shaft 51 to the piston rod 42 side by the elastic force of the elastic member, When the coil 64 is energized, the movement of the piston rod 42 may be allowed by sucking the plunger 62C toward the side away from the piston rod 42 against the elastic force of the elastic member. Further, using the plunger 62D having the same shape as the plunger 62B, when the coil 64 is not energized, the lock shaft 51 is urged away from the piston rod 42 by the elastic force of the elastic member to move the piston rod 42. When the coil 64 is energized, the movement of the piston rod 42 may be restricted by attracting the plunger 62D toward the piston rod 42 against the elastic force of the elastic member and fixing the lock shaft 51. Good.

  In the parking device of the present embodiment, the magnetic lock device 50 is configured such that the lock shaft 51 and the shaft member 61 (plunger 62 and permanent magnet 63) are configured separately, but may be configured integrally. Good.

  In the parking device of the present embodiment, the magnetic locking device 50 includes a lock shaft 51 and a shaft member 61 that move in a direction (left-right direction in FIG. 2) perpendicular to the axial direction (up-down direction in FIG. 2) of the piston rod 42. The movement of the piston rod 42 is restricted and the restriction is released, but the movement of the piston rod 42 is restricted and the restriction is released using a member that moves in the axial direction of the piston rod 42. It is good also as what to do.

  Next, the parking apparatus of the present invention will be described.

  A parking device according to the present invention is mounted on a vehicle, and includes a parking mechanism that switches between a parking lock state and a parking lock release state by elastic force and hydraulic pressure, hydraulic oil supply / discharge means that supplies and discharges hydraulic oil to and from the parking mechanism, And a control unit that controls the parking mechanism and the hydraulic oil supply / discharge unit. The parking mechanism includes a moving member that moves in a first direction, and the moving member that moves in the first direction by an elastic force. A first elastic member that urges toward the lock side that forms the parking lock state in the direction, and a housing that accommodates the moving member and forms a hydraulic oil chamber with the moving member. Due to the hydraulic pressure supplied from the draining means to the hydraulic oil chamber, the moving member moves toward the lock release side forming the parking lock release state in the first direction A hydraulic unit that moves, and a movement regulating unit that regulates the movement of the moving member in the first direction and releases the regulation, and the control means is in a parking lock release state and the vehicle is stopped and When a predetermined diagnosis condition that the driver does not intend to travel is satisfied, the hydraulic oil in the hydraulic oil chamber is operated by the hydraulic oil supply / discharge means together with the movement restriction unit moving the lock member to the lock side. And whether or not the movement restriction unit is normal is determined by whether or not the parking lock release state is maintained. After the diagnosis, the hydraulic oil is supplied to the hydraulic oil chamber by the hydraulic oil supply / discharge means. It is made to supply.

  In the parking device according to the present invention, when the parking lock is released, the vehicle is stopped, and a predetermined diagnosis condition that the driver does not intend to travel is satisfied, the movement restriction unit restricts the movement of the moving member to the lock side. The hydraulic oil is discharged from the hydraulic oil chamber by the hydraulic oil supply / discharge means (hereinafter referred to as “regulatory discharge processing”), and whether or not the movement restriction unit is normal depending on whether or not the parking lock release state is maintained. After the diagnosis, hydraulic oil is supplied to the hydraulic oil chamber by the hydraulic oil supply / discharge means. When the regulation discharge process is performed when the predetermined diagnosis condition is established, if the movement regulation unit is normal, the moving member does not move to the lock side, and the parking lock release state is maintained. On the other hand, if the movement restricting unit is abnormal, the moving member moves to the lock side by the elastic force of the first elastic member, and a parking lock state is formed. Therefore, this method can diagnose whether the movement restriction unit is normal. As a result, whether or not the movement regulating unit is normal (before the hydraulic oil is not supplied to the hydraulic oil chamber but the parking lock release state needs to be maintained, for example, the shift lever is Can be grasped before the idle stop of the prime mover for operating the pump for pumping the hydraulic oil to the hydraulic oil supply / discharge means. After the diagnosis, by supplying the hydraulic oil to the hydraulic oil chamber, the parking lock release state can be formed not only when the movement restriction unit is normal but also when it is abnormal, and subsequent driving can be resumed Can be.

  In the parking apparatus according to the present invention, the predetermined diagnosis condition is that the parking lock is released, the vehicle is stopped, and the driver does not intend to travel and further operates the pump that pumps hydraulic oil to the hydraulic oil supply / discharge means. It can also be established when the prime mover to be operated is in operation. The control means may determine that the driver does not intend to travel when the brake is on and the accelerator is off.

  In the parking apparatus of the present invention, the movement restricting unit includes a movement restricting member having a contact portion that can come into contact with a contacted portion provided on the moving member, and the movement restricting unit is configured by elastic force or magnetic force. It is also possible to restrict the movement of the moving member in the first direction when the contacted portion and the contact portion are in contact with each other by locking the member.

  In the parking apparatus of the present invention in which the movement restriction unit includes a movement restriction member, the movement restriction member may be moved in a second direction orthogonal to the first direction. In this way, the arrangement in the limited space may be better than the arrangement in which both the moving member and the movement restricting member move in the same direction (coaxially). it can.

  In the parking apparatus according to the aspect of the invention in which the movement restricting member moves in the second direction orthogonal to the first direction, the movement restricting unit moves the second restricting member by the elastic force in addition to the movement restricting member. A second elastic member that urges the moving member toward the moving member, a permanent magnet that locks the moving restricting member from being separated from the moving member by a magnetic force, and the movement by the permanent magnet with energization of a coil. It is also possible to include a lock release unit that releases the lock of the restriction member. In this configuration, when the coil is not energized, the movement restricting member is locked so as not to be separated from the moving member by the magnetic force of the permanent magnet, so that the contacted portion of the moving member and the contacted portion of the movement restricting member are At the time of contact, movement of the moving member in the first direction can be restricted. Thereby, the parking lock state and the parking lock release state can be maintained. At this time, since it is not necessary to energize the coil, power consumption can be suppressed. On the other hand, when the coil is energized, the movement restricting member is unlocked by the permanent magnet (the movement restricting member is allowed to be separated from the moving member), so that the moving member can move in the first direction. it can. Thereby, the parking lock state and the parking lock release state can be switched.

  Furthermore, in the parking apparatus according to the present invention, the hydraulic oil supply / discharge means discharges the hydraulic oil in the hydraulic oil chamber in a first state in which hydraulic oil from a pump that pumps hydraulic oil is supplied to the hydraulic oil chamber. A switching valve for switching between the second state and the second state may be included.

  In addition, the parking mechanism is connected to the parking gear attached to the rotation shaft of the transmission, the parking pole engageable with the parking gear, the moving member and the parking pole, and rotates around the support shaft. A detent lever capable of detecting the rotational position of the detent lever, and the control means uses the rotational position of the detent lever detected by the sensor to determine whether the parking lock release state is maintained. It is also possible to diagnose whether or not the movement restriction unit is normal.

  A method for diagnosing a movement restricting unit in a parking apparatus according to the present invention is mounted on a vehicle, and includes a parking mechanism that switches between a parking lock state and a parking lock release state by elastic force and hydraulic pressure, and supplies and discharges hydraulic oil to and from the parking mechanism. Hydraulic oil supply / discharge means, and the parking mechanism urges the moving member to a lock side that forms the parking lock state in the first direction by an elastic force and a moving member that moves in the first direction. A first elastic member and a housing that accommodates the moving member and forms a hydraulic oil chamber, and the moving member is moved by the hydraulic pressure supplied from the hydraulic oil supply / discharge means to the hydraulic oil chamber; The hydraulic unit that moves to the unlocking side that forms the parking lock releasing state in one direction and the movement of the moving member in the first direction are restricted. And a movement restriction unit for releasing the restriction, and a method for diagnosing the movement restriction unit in the parking apparatus, wherein the parking lock is released, the vehicle is stationary, and the driver does not intend to travel. Is established, the hydraulic oil in the hydraulic oil chamber is discharged by the hydraulic oil supply / discharge means with the movement restriction unit moving the lock member to the lock side, and the parking lock release state is set. Whether or not the movement restricting unit is normal is diagnosed based on whether or not it is held, and after the diagnosis, hydraulic oil is supplied to the hydraulic oil chamber by the hydraulic oil supply / discharge means.

  In the method for diagnosing the movement restricting unit in the parking apparatus of the present invention, when the predetermined lock condition is established when the parking lock is released, the vehicle is stopped, and the driver does not intend to travel, the moving restricting unit detects the moving member. The hydraulic oil in the hydraulic oil chamber is discharged by the hydraulic oil supply / discharge means with the restriction of movement to the lock side (hereinafter referred to as restriction discharge processing), and the movement moves depending on whether or not the parking lock release state is maintained. Whether the regulation unit is normal is diagnosed, and after the diagnosis, the hydraulic oil is supplied to the hydraulic oil chamber by the hydraulic oil supply / discharge means. When the regulation discharge process is performed when the predetermined diagnosis condition is established, if the movement regulation unit is normal, the moving member does not move to the lock side, and the parking lock release state is maintained. On the other hand, if the movement restricting unit is abnormal, the moving member moves to the lock side by the elastic force of the first elastic member, and a parking lock state is formed. Therefore, this method can diagnose whether the movement restriction unit is normal. As a result, whether or not the movement regulating unit is normal (before the hydraulic oil is not supplied to the hydraulic oil chamber but the parking lock release state needs to be maintained, for example, the shift lever is Can be grasped before the idle stop of the prime mover for operating the pump for pumping the hydraulic oil to the hydraulic oil supply / discharge means. After the diagnosis, by supplying the hydraulic oil to the hydraulic oil chamber, the parking lock release state can be formed not only when the movement restriction unit is normal but also when it is abnormal, and subsequent driving can be resumed Can be.

  Next, the correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problems will be described. In the embodiment, the hydraulic actuator 40 corresponds to a “hydraulic unit”, the magnetic lock device 50 corresponds to a “movement restriction unit”, the hydraulic control device 70 corresponds to “hydraulic oil supply / discharge means”, and the transmission ECU 21 “ It corresponds to “control means”.

  The correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problem is the same as that of the embodiment described in the column of means for solving the problem. Therefore, the elements of the invention described in the column of means for solving the problems are not limited. That is, the interpretation of the invention described in the column of means for solving the problem should be made based on the description of the column, and the embodiment of the invention described in the column of means for solving the problem is described. It is only a specific example.

  As mentioned above, although the form for implementing this invention was demonstrated, this invention is not limited to such embodiment at all, and it can implement with a various form in the range which does not deviate from the summary of this invention. Of course.

  The present invention can be used in the parking device manufacturing industry.

  10 automobiles, 12 engines, 14 electronic control units (engine ECUs) for engines, 15 electronic control units for brakes (brake ECUs), 20 power transmission devices, 21 electronic control units for transmissions (transmission ECUs), 22 transmission cases, 23 start Device, 24 oil pump, 25 automatic transmission, 30 parking mechanism, 32 parking gear, 32a tooth, 33 parking pole, 33a protrusion, 34 parking rod, 35 cam member, 36 support roller, 37 cam spring, 38 detent lever, 38a 1st free end, 38b 2nd free end, 38h hole, 38r engagement recess, 38rp rotational position detection sensor, 39 engagement member, 40 hydraulic actuator, 41 case, 41f oil chamber, 41h oil hole, 41p piston Chamber 4 s Spring chamber, 42 Piston rod, 42h Hole, 42p Connection pin, 42r Connection recess, 42s Support shaft, 44 Piston, 45 Seal member, 46 Return spring, 50 Magnetic lock device, 51 Lock shaft, 52 Small diameter part, 53 Large Diameter part, 55 Shaft holder, 57 Linear motion bearing, 60 Magnetic part, 61 Shaft member, 61a Recessed part, 62 Plunger, 63 Permanent magnet, 64 Coil, 65a Flange part, 66 Core, 67 Rear cap, 68 Spring, 70 Hydraulic control Device, 72 Primary regulator valve, 74 Linear solenoid valve, 76 Switching valve, 91 Accelerator pedal, 92 Accelerator pedal position sensor, 93 Brake pedal, 94 Master cylinder pressure sensor, 95 Shift lever, 96 shift Position sensor, 98 vehicle speed sensor, 99 warning lights, 510 contact portion, 511 first abutment surface 512 second contact surface.

Claims (9)

A parking mechanism that is mounted on a vehicle and switches between a parking lock state and a parking lock release state by elastic force and hydraulic pressure, hydraulic oil supply / discharge means that supplies / discharges hydraulic oil to / from the parking mechanism, the parking mechanism, and the hydraulic oil A parking device comprising a control means for controlling the supply / discharge means,
The parking mechanism is
A moving member that moves in a first direction; a first elastic member that urges the moving member toward a lock side that forms the parking lock state in the first direction by elastic force; A movable member and a casing forming a hydraulic oil chamber, and the movable member forms the parking lock release state in the first direction by hydraulic pressure supplied from the hydraulic oil supply / discharge means to the hydraulic oil chamber. A hydraulic unit that moves to the unlocking side,
A movement restricting unit that restricts movement of the moving member in the first direction and releases the restriction;
With
The control means restricts movement of the moving member to the lock side by the movement restricting unit when the parking lock is released, the vehicle is stopped, and a predetermined diagnosis condition that the driver does not intend to travel is satisfied. The hydraulic oil is discharged from the hydraulic oil chamber by the hydraulic oil supply / discharge means, and whether or not the movement restriction unit is normal is determined by whether or not the parking lock release state is maintained. Later, hydraulic oil is supplied to the hydraulic oil chamber by the hydraulic oil supply / discharge means.
The parking apparatus characterized by the above-mentioned. The parking device according to claim 1,
The predetermined diagnosis condition is that the parking lock is released, the vehicle is stopped, the driver does not intend to travel, and the prime mover for operating the pump for pumping hydraulic oil to the hydraulic oil supply / discharge means is operating. Is established,
Parking device. The parking device according to claim 1 or 2,
The control means determines that the driver does not intend to travel when the brake is on and the accelerator is off.
Parking device. The parking device according to any one of claims 1 to 3,
The movement restricting unit includes a movement restricting member having an abutting portion that can come into contact with an abutted portion provided on the moving member, and locks the movement restricting member by an elastic force or a magnetic force to thereby apply the contact. It is configured to restrict movement of the moving member in the first direction at the time of contact between the contact portion and the contact portion.
The parking apparatus characterized by the above-mentioned. The parking device according to claim 4,
The movement restricting member moves in a second direction orthogonal to the first direction;
The parking apparatus characterized by the above-mentioned. The parking device according to claim 5,
In addition to the movement restriction member, the movement restriction unit includes a second elastic member that urges the movement restriction member toward the movement member in the second direction by an elastic force, and the movement restriction member moves by the magnetic force. A permanent magnet that locks so as not to be separated from the member, and a lock release unit that unlocks the movement restricting member by the permanent magnet with energization of the coil.
The parking apparatus characterized by the above-mentioned. The parking device according to any one of claims 1 to 6,
The hydraulic oil supply / discharge means switches a switching valve between a first state in which hydraulic oil from a pump for pumping hydraulic oil is supplied to the hydraulic oil chamber and a second state in which hydraulic oil in the hydraulic oil chamber is discharged. Having
The parking apparatus characterized by the above-mentioned. The parking device according to any one of claims 1 to 7,
The parking mechanism includes a parking gear attached to a rotation shaft of the transmission, a parking pole engageable with the parking gear, a detent connected to the moving member and the parking pole and rotatable about a support shaft. A lever, and a sensor for detecting the rotational position of the detent lever,
The control means diagnoses whether or not the movement restriction unit is normal by determining whether or not the parking lock release state is maintained using the rotational position of the detent lever detected by the sensor.
The parking apparatus characterized by the above-mentioned. A parking mechanism that is mounted on a vehicle and switches between a parking lock state and a parking lock release state by elastic force and hydraulic pressure; and a hydraulic oil supply / discharge unit that supplies / discharges hydraulic oil to / from the parking mechanism, and the parking mechanism includes: A moving member that moves in a first direction and an elastic force that house the moving member and the first elastic member that urges the moving member toward the lock side that forms the parking lock state in the first direction and the moving member And a casing that forms a hydraulic oil chamber, and the movable member forms the parking lock release state in the first direction by the hydraulic pressure supplied from the hydraulic oil supply / discharge means to the hydraulic oil chamber. A hydraulic unit that moves to the side, and a movement restriction unit that restricts movement of the moving member in the first direction and releases the restriction. Method of diagnosing a movement restricting unit in the ring system,
When the parking lock is released, the vehicle is stopped, and a predetermined diagnostic condition is established that the driver does not intend to travel, the operation is performed with the movement restriction unit restricting movement of the moving member to the lock side. The hydraulic oil is discharged from the hydraulic oil chamber by an oil supply / discharge means, and whether or not the movement restriction unit is normal is determined by whether or not the parking lock release state is maintained. Hydraulic oil is supplied to the hydraulic oil chamber by supply and discharge means;
A method for diagnosing a movement restricting unit in a parking apparatus.

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