Abstract: A constant mesh type transmission for a straddled vehicle includes an input shaft; a plurality of drive gears; an output shaft; a plurality of driven gears; and a gear stage setting mechanism, including a ratchet mechanism. The ratchet mechanism includes a n-th speed accelerating pawl, a n-th speed decelerating pawl, a (n+1)-th speed accelerating pawl, a (n+1)-th speed decelerating pawl, a rotary cam, and a plurality of sliders. The rotary cam has a plurality of cam portions on an outer peripheral surface thereof which position the respective guide object parts such that the plurality of sliders raise an accelerating pawl and a decelerating pawl corresponding to a selected gear stage and lower an accelerating pawl and a decelerating pawl corresponding to a non-selected gear stage.

Abstract: A constant-mesh type transmission for straddled vehicle with a ratchet mechanism is configured to be mounted on a straddled vehicle and has five or more gear stages in addition to a neutral position. The transmission includes an input shaft; five or more drive gears; an output shaft; an odd-numbered stage hub and an even-numbered stage hub; a plurality of odd-numbered stage driven gears; a plurality of even-numbered stage driven gears; a dog engagement mechanism; and a ratchet mechanism. The ratchet mechanism has an odd-numbered stage accelerating pawl, an odd-numbered stage decelerating pawl, an even-numbered stage accelerating pawl, an even-numbered stage decelerating pawl, and a ratchet control mechanism.

Abstract: A constant-mesh type transmission for straddled vehicle with a ratchet mechanism is configured to be mounted on a straddled vehicle and has five or more gear stages in addition to a neutral position. The transmission includes an input shaft; five or more drive gears; an output shaft; an odd-numbered stage hub and an even-numbered stage hub; a plurality of odd-numbered stage driven gears; a plurality of even-numbered stage driven gears; a dog engagement mechanism; and a ratchet mechanism. The ratchet mechanism has an odd-numbered stage accelerating pawl, an odd-numbered stage decelerating pawl, an even-numbered stage accelerating pawl, an even-numbered stage decelerating pawl, and a ratchet control mechanism.

Abstract: A constant mesh type transmission for a straddled vehicle includes an input shaft; a plurality of drive gears; an output shaft; a plurality of driven gears; and a gear stage setting mechanism, including a ratchet mechanism. The ratchet mechanism includes a n-th speed accelerating pawl, a n-th speed decelerating pawl, a (n+1)-th speed accelerating pawl, a (n+1)-th speed decelerating pawl, a rotary cam, and a plurality of sliders. The rotary cam has a plurality of cam portions on an outer peripheral surface thereof which position the respective guide object parts such that the plurality of sliders raise an accelerating pawl and a decelerating pawl corresponding to a selected gear stage and lower an accelerating pawl and a decelerating pawl corresponding to a non-selected gear stage.

Abstract: A transmission changes gears in a MT system, an AT system, and an AMT system wherein unintended transition between an AT mode and a MT mode or between an AMT mode and a MT mode is prevented. A selector in a controller performs a mode selection control such that, when performing transition between the AT mode and the MT mode or between the AMT mode and the MT mode, the driver at least has to operate a mode switching switch while operating a clutch lever in an operation amount not smaller than a predetermined threshold.

Abstract: A transmission apparatus mounted on a vehicle has a front-wheel speed sensor for sensing a rotation speed of a front wheel. A control unit has a ratio-change correction part that determines a correction in transmission control of the transmission apparatus using the rotation speed of the front wheel sensed by a front-wheel speed sensor. The control unit limits execution of the correction under a condition that an external device is connected to a connector. Thereby, the execution of the correction based on the rotation speed of the front wheel without a worker's intention during driving on a chassis dynamo may be suppressed.

Abstract: A transmission changes gears in a MT system, an AT system, and an AMT system wherein unintended transition between an AT mode and a MT mode or between an AMT mode and a MT mode is prevented. A selector in a controller performs a mode selection control such that, when performing transition between the AT mode and the MT mode or between the AMT mode and the MT mode, the driver at least has to operate a mode switching switch while operating a clutch lever in an operation amount not smaller than a predetermined threshold.

Abstract: A transmission apparatus includes a plurality of cam grooves on a peripheral surface to move shift forks, a shift cam configured to change a rotation position from a neutral position to a maximum speed position through a first speed position, and a shift mechanism configured to intermittently rotate the shift cam in response to a transmission operation and to hold the shift cam at each position from the neutral position and the first speed position to the maximum speed position. The shift mechanism holds the shift cam at a rotation position in which a rotation angle between the neutral position and the first speed position is the same as a rotation angle between the first speed position and a second speed position, wherein a rotation angle between the maximum speed position and the neutral position is smaller than the rotation angle between the neutral position and the first speed position.

Abstract: A combination torsion spring is configured such that a predetermined reaction force is generated in a coil circumferential direction without a center of a wound coil tilting even when applied with a load. A first torsion spring and a second torsion spring of the combination torsion spring are each provided with a coil. Each coil is formed by spirally winding a copper wire in a different winding direction from one another. The inner diameter of the coil of the first torsion spring is approximately the same as the outer diameter of the coil of the second torsion spring. In the combination torsion spring, the coil of the second torsion spring is inserted into the coil of the first torsion spring.

Abstract: An antiskid apparatus for a hybrid vehicle includes a generator control section that adjusts a deceleration torque of a driving wheel by controlling a power generator to change from an operation of decreasing a generation amount of the power generator to an operation of assisted driving of a crankshaft when an engine rotation speed is higher than a predetermined rotation speed during rapid deceleration in which a vehicle deceleration speed is at a predetermined value or more or during deceleration associated with shift-down through a transmission.

Abstract: A transmission apparatus includes a plurality of cam grooves on a peripheral surface to move shift forks, a shift cam configured to change a rotation position from a neutral position to a maximum speed position through a first speed position, and a shift mechanism configured to intermittently rotate the shift cam in response to a transmission operation and to hold the shift cam at each position from the neutral position and the first speed position to the maximum speed position. The shift mechanism holds the shift cam at a rotation position in which a rotation angle between the neutral position and the first speed position is the same as a rotation angle between the first speed position and a second speed position, wherein a rotation angle between the maximum speed position and the neutral position is smaller than the rotation angle between the neutral position and the first speed position.

Abstract: A power unit includes an engine, an electric-powered generator configured to regenerate power and to provide power assistance, a stepped or stepless transmission mechanism configured to perform a shift change operation during transmission of rotational power output from the engine and the electric-powered generator, an output shaft configured to output the rotational power as a driving force, a first clutch configured to transmit the rotational power or to disconnect the transmission of the rotational power from at least one of the engine and the electric-powered generator to the output shaft, and a battery configured to supply power to the electric-powered generator to drive the electric-powered generator and to store power generated by the electric-powered generator. During the shift change operation by the transmission mechanism, electric-powered generator is driven to add torque to the engine in a direction of increasing synchronization with the rotation of the output shaft.

Abstract: A transmission apparatus mounted on a vehicle has a front-wheel speed sensor for sensing a rotation speed of a front wheel. A control unit has a ratio-change correction part that determines a correction in transmission control of the transmission apparatus using the rotation speed of the front wheel sensed by a front-wheel speed sensor. The control unit limits execution of the correction under a condition that an external device is connected to a connector. Thereby, the execution of the correction based on the rotation speed of the front wheel without a worker's intention during driving on a chassis dynamo may be suppressed.

Abstract: A dual clutch automated manual transmission includes a first clutch and a second clutch, and a clutch torque capacity command value for a plurality of clutch actuators arranged to drive the first clutch and second clutch based on operation of a by-wire type of clutch lever, wherein the clutch torque capacity of the plurality of clutches is controlled. An operator can adjust a driving force by manually operating the clutch in the transmission in which a clutch operation is controlled automatically, such as an automatic transmission system, automated manual transmission system, or dual clutch automated manual transmission system, thereby improving drivability.

Abstract: An antiskid apparatus for a hybrid vehicle includes a generator control section that adjusts a deceleration torque of a driving wheel by controlling a power generator to change from an operation of decreasing a generation amount of the power generator to an operation of assisted driving of a crankshaft when an engine rotation speed is higher than a predetermined rotation speed during rapid deceleration in which a vehicle deceleration speed is at a predetermined value or more or during deceleration associated with shift-down through a transmission.

Abstract: In a twin clutch transmission, a first main shaft transfers rotation power of a crankshaft that is provided in parallel, input via a first clutch, to a drive shaft via an odd-numbered transmission gear mechanism. A second main shaft transfers rotation power of the crankshaft that is provided in parallel, input via a second clutch, to the drive shaft via an even-numbered transmission gear mechanism. In a first power transfer path running from the crankshaft to the drive shaft via the first clutch and a second power transfer path running from the crankshaft to the drive shaft via the second clutch, back torque limiters are provided that, when reverse torque operates in a direction opposite the direction for acceleration of a rear wheel, limits transfer of the reverse torque.

Abstract: A shift mechanism that provides a shift mechanism for enabling smooth gear shifting by a transmission, and a vehicle equipped therewith. With this mechanism, a shift drum, to which shift forks are connected via grooves on an outer periphery, is held every predetermined rotation angle. When differences are produced in the degree of rotation between a third rotating member that rotates by motor rotation and a second rotating member that rotates in accordance with the third rotating member, bias is accumulated in a torsion spring. Bias that is accumulated is released when the rotation angle of the third rotating member equals or exceeds a predetermined angle of rotation, rotating a first rotating member via a second rotating member, and rotating the shift drum quickly.

Abstract: In an engine unit, a drive unit case includes a crank shaft disposed in a left-right direction of a vehicle, a drive shaft and a second main shaft. A transmission shaft is parallel or substantially parallel to the drive shaft and transmits rotational power, which has been transmitted via a middle gear, to a propeller shaft. A second clutch, which transmits rotational power from the crank shaft to the second main shaft, is freely detachably connected to an end of one side of the second main shaft which protrudes from a drive unit case more than the end of one side of the drive shaft, at a position that overlaps with at least one section of the middle gear on the side of the shaft direction of the drive shaft.

Abstract: A twin clutch transmission can be made sufficiently small and can easily be mounted on a motorcycle without biasing the lateral weight balance. In this transmission, a first clutch is arranged to input rotation power transferred from a crankshaft to a first main shaft and to output the rotation power to a rear wheel via an odd-numbered transmission gear mechanism, and a second clutch is arranged to input rotation power transferred from the crankshaft to a second main shaft and to output the rotation power to the rear wheel via an even-numbered transmission gear mechanism.

Abstract: A dual clutch automated manual transmission includes a first clutch and a second clutch, and a clutch torque capacity command value for a plurality of clutch actuators arranged to drive the first clutch and second clutch based on operation of a by-wire type of clutch lever, wherein the clutch torque capacity of the plurality of clutches is controlled. An operator can adjust a driving force by manually operating the clutch in the transmission in which a clutch operation is controlled automatically, such as an automatic transmission system, automated manual transmission system, or dual clutch automated manual transmission system, thereby improving drivability.