Abstract: A control system for a vehicle, the control system includes a selectable one-way clutch, a motor, and an electronic control unit. The electronic control unit is configured to (i) execute rotation control to control the motor such that negative differential rotation changes into positive differential rotation when the selectable one-way clutch is switched from a disengaged state to an engaged state while differential rotation of the selectable one-way clutch is negative and (ii) initiate engagement control by a switching mechanism such that a projecting operation of the selectable one-way clutch is completed while the differential rotation is negative.

Abstract: A control system is for a vehicle (Ve), and the control system comprises an electronic control unit (18). The electronic control unit (18) is configured to (i) produce differential rotation by controlling a rotational speed of either a first clutch member (24) or a second clutch member (25) of a selectable one-way clutch (17) by a motor (2), and (ii) execute the following processes in an order of (1.) to (4.) in the case where the electronic control unit (18) switches the selectable one-way clutch (17) from a disengaged state to a engaged state: (1.) controlling the motor (2) such that the differential rotation becomes the negative differential rotation; (2.) switching the selectable one-way clutch (17) from a second state to a first state; (3.) controlling the motor (2) such that the differential rotation becomes the positive differential rotation; and (4.) engaging a part of a strut with a part of the second clutch member (25).

Abstract: This invention addresses the problem of providing a press-fit structure and a press-fit method capable of improving the durability of a gear which press-fits into a ring part. As such, the embodiment of this invention is that, while one end side in the central axis direction of the ring gear abuts against a protrusion formed protruding on the outer side of the radial direction of the ring part from the outer circumferential surface of the ring of the ring part, and wherein the press-fit structure press-fits the inner circumferential surface of the gear into the outer circumferential surface of the ring part, when the inner circumferential surface of the gear is press-fitted into the outer circumferential surface of the ring part, there is a tensile strength reduction mechanism reducing the tensile strength generated in the lower portion of the gear teeth in at least the position of the aforementioned end side of the gear.

Abstract: A selectable one-way clutch that can prevent unintentional rotation of a selector plate by a drag torque is provided. In the selectable one-way clutch, a selector plate having a first aperture for letting through a strut is interposed between a fixed plate and a rotary plate while being allowed to rotate between an engagement position and a disengagement position. The selectable one-way clutch comprises: a protector plate interposed between the rotary plate and the selector plate; and a second aperture formed on the protector plate to let through the strut when the selector plate is rotated to the engagement position.

Abstract: A selectable one-way clutch to prevent an unintentional engagement, and a vehicle having the selectable one-way clutch are provided. The selectable one-way clutch comprises a fixed plate, a rotary plate opposed to the fixed plate, and a selector plate interposed between the fixed plate and the rotary plate. A strut is held on the fixed plate in a pivotal manner to be selectively engaged with the rotary plate. The selector plate is rotated between an engagement position at which the strut is allowed to project toward the rotary plate to be engaged therewith, and a disengagement position at which the strut is pushed into the fixed plate to be disengaged from the rotary plate. A groove inlet is formed on the inner face to introduce oil to a clearance between the fixed plate and the selector plate.

Abstract: A selectable one-way clutch that can limit damage on components in an overrunning mode is provided. The selectable one-way clutch comprises a shutter plate arranged in a notch plate. The shutter plate is moved radially outwardly by a centrifugal force resulting from a rotation of the notch plate to prevent an entrance of the leading end of a strut into a notch.

Abstract: A selectable one-way clutch is provided to prevent a selector plate from being rotated undesirably by a drag torque even if an oil temperature is low. An actuator comprises a casing to which the plunger is inserted while being allowed to reciprocate therein, and a chamber holding a return spring for pushing the plunger out of the casing. The plunger is connected to the selector plate through the arm, and a through hole is formed on the chamber to introduce and discharge oil to/from the chamber.

Abstract: A hybrid vehicle includes: an engine; a first motor; an output member; a differential mechanism, the engine, the first motor, and the output member being coupled via the differential mechanism; a second motor configured to apply torque to the output member; and an engagement mechanism configured to stop rotation of an output shaft of the engine or rotation of a specified rotational member that is coupled to the output shaft of the engine. An electronic control unit is configured to (i) engage the engagement mechanism when the hybrid vehicle travels reversely by drive power of the second motor or drive power of the first motor and the second motor, and (ii) disengage the engagement mechanism when the hybrid vehicle travels forward by the drive power of the second motor or the drive power of the first motor and the second motor.

Abstract: A control system for a hybrid vehicle configured to prevent an undesirable engagement of the selectable one-way clutch is provided. In order to reduce a drag torque resulting from a cranking of an engine to bring the selectable one-way clutch into engagement mode, the control system raises a temperature of lubrication oil before carrying out the cranking of the engine if it is too low, and carries out the cranking of an engine by a motor after the temperature of the lubrication oil is raised to a level at which viscosity thereof is reduced.

Abstract: A selectable one-way clutch adapted to prevent an undesirable engagement is provided. The selectable one-way clutch comprises a drag increasing device that increases a drag of oil acting between the pocket plate and the selector plate against a force rotating the selector plate in a direction to bring the selectable one-way clutch into the engagement mode.

Abstract: A selectable one-way clutch is provided. The selectable one-way clutch is shifted between overrunning mode and engagement mode by rotating a selector plate interposed between a notch plate and a pocket plate. The selectable one-way clutch comprises: a plunger that is connected to the selector plate and that is reciprocated by the actuator; a thermally shrinkable stopper member that is fitted onto the plunger; and a stationary member to which the stopper member is brought into abutment by a reciprocating motion of the plunger.

Abstract: A selectable one-way clutch to selectively enable torque transmission only in one direction and to interrupt torque transmission in both directions is provided. The selectable one-way clutch comprises: an oil passage that is formed in the selector plate, and that has a first opening situated at a lower level than the oil level and a second opening situated at a higher level than the oil level; and a closure that is formed on the pocket plate at a position to close the second opening at least partially when the selectable one-way clutch is in the overrunning mode, and to increase the opening area of the second opening when the selectable one-way clutch is in the engagement mode.

Abstract: A fixation structure for a selectable one-way clutch is provided. The fixation structure comprises: a stationary member in which the pocket plate is held coaxially; a projection formed on the pocket plate protruding radially outwardly; a spline groove formed in the stationary member to which the projection is inserted while keeping a predetermined clearance in a circumferential direction; and an elastic member that is interposed between the projection and the spline groove to push the projection in a direction that the strut held in an upper side of the pocket is moved toward the notch.

Abstract: A drive system includes: a power split mechanism including a planetary gear unit, in which a ring gear is connected to an internal combustion engine, a sun gear is connected to a motor, and a carrier is connected to a counter shaft in a manner capable of transmitting power; a lock mechanism that can lock the sun gear; and a clutch mechanism that can engage the sun gear and the ring gear. The internal combustion engine, the power split mechanism, the motor, the lock mechanism, and the clutch mechanism are arranged on the same axis. The lock mechanism and the clutch mechanism are arranged on an opposite side of the internal combustion engine with the power split mechanism and the motor being interposed therebetween.

Abstract: A power transmission device comprises an engine and a first motor. A second motor is arranged on a different shaft from a shaft on which the engine is arranged. A first differential mechanism has a sun gear to which the first motor is connected, a carrier to which the engine is connected, and a ring gear to which the second motor and a drive wheel are connected. A second differential mechanism has a first rotational element to which the first motor is connected, a second rotational element, and a third rotational element to which the engine is connected, and is arranged such that the first motor is located between the first differential mechanism and the second differential mechanism. A case houses the second differential mechanism. A brake mechanism is configured to restrict rotation of the second rotational element and is arranged in the case.

Abstract: A power transmission device for a hybrid vehicle includes a transmission device that includes a carrier to which an engine rotation shaft is connected; a differential device that includes a plurality of rotation components individually connected to a ring gear of the transmission device, an MG1 rotation shaft, an MG2 rotation shaft, and a drive wheel; a gear shift adjustment device that includes an engagement portion capable of controlling the transmission device to a neutral state where transmission of power between the carrier and the ring gear is not allowed or to a state where the transmission of power is allowed; and an HVECU that includes a first step of decreasing a rotating speed of a first rotating electric machine at the time an engine is started up during an EV travel mode.

Abstract: A fixation structure for a selectable one-way clutch that can prevent engagement delay and imperfect engagement of the selectable one way clutch is provided. The fixation structure comprises a ridge formed on a back face of the pocket plate to be splined to a casing. The ridge is situated radially inner side of a strut held in a pocket plate.

Abstract: A selectable one-way clutch is provided. The selectable one-way clutch comprises a selector member rotated at a predetermined angle between an engagement position and a disengagement position, and an actuator that reciprocates linearly along a tangential line of the selector member to rotate the selector member to the engagement position and to the disengagement position. The actuator comprises an actuation member that is offset from the selector member in a direction along a rotational center axis of the selector member to actuate along the tangential line of the circumference of the selector member. The selectable one-way clutch further comprises an arm connecting the actuation member and the selector member to rotate the selector member by a linear motion of the actuation member.

Abstract: An actuator is fixed to a predetermined stationary member. A plunger is supported by a casing of the actuator while being allowed to reciprocate linearly. The plunger has a joint on an exposed area thereof that is connected to a selector plate. A leading end of the plunger from the joint is also supported while being allowed to reciprocate by a supporting member formed integrally with a stationary member to which the casing is fixed.

Abstract: An SOWC configured to prevent an unintentional engagement is provided. A pawl comprises a strut that is pushed up toward a notch through an aperture of a selector plate, a stopper plate protruding laterally from a rear end side of the strut, and a first inclined face formed on the stopper plate to incline downwardly from the rear end side toward the leading end side of the strut. A side plate is formed along each long side of the aperture to protrude toward the pocket plate, and the second inclined face is formed on the side plate to be brought into contact to the first inclined face.