A synchronous engagement clutch (SEC) assembly is provided. The SEC assembly includes a starter ball guide and a carrier support. The starter ball guide includes opposed first and second sides and the carrier support includes opposed first and second sides. The first side of the starter ball guide defines an annular groove and the second side of the carrier support defines pockets. The starter ball guide and the carrier support are disposable with the first side of the starter ball guide facing the second side of the carrier support such that engagement balls are retainable in the pockets and the annular groove.

A clutch weight for a continuously variable transmission is disclosed. The clutch weight, in certain examples, includes a body having a first end having a pivot pin opening and a second end opposite the first end, a curvilinear surface disposed between the first end and the second end configured to engage a roller, and wherein the roller contacts the curvilinear surface at least at a first contact position, and a center of mass of the body disposed a distance Y from a center of the pivot pin opening and a distance X from the first contact position, and where a ratio of X to Y is in the range of between about 0.499 and 0.685.

A clutch weight for a continuously variable transmission is disclosed. The clutch weight, in certain examples, includes a body having a first end having a pivot pin opening and a second end opposite the first end, a curvilinear surface disposed between the first end and the second end configured to engage a roller, and wherein the roller contacts the curvilinear surface at least at a first contact position, and a center of mass of the body disposed a distance Y from a center of the pivot pin opening and a distance X from the first contact position, and where a ratio of X to Y is in the range of between about 0.499 and 0.685.

Provided is an easy engine starting system including: an engine; a centrifugal clutch configured to transmit a driving force of the engine to a driven device; and a control device configured to adjust output of the engine. When the engine is to be started, the engine is accelerated at start engine output which enables the engine to reach a rotation speed higher than a clutch-in rotation speed. The control device has suppression control of suppressing, at the start engine output, the rotation speed to a rotation speed equal to or lower than the clutch-in rotation speed.

Provided is an easy engine starting system including: an engine; a centrifugal clutch configured to transmit a driving force of the engine to a driven device; and a control device configured to adjust output of the engine. When the engine is to be started, the engine is accelerated at start engine output which enables the engine to reach a rotation speed higher than a clutch-in rotation speed. The control device has suppression control of suppressing, at the start engine output, the rotation speed to a rotation speed equal to or lower than the clutch-in rotation speed.

A clutch assembly includes an output shaft extending along an axis and output teeth. A movable component is disposed adjacent to the output component. The movable component includes drive teeth and an annular engagement weight track including a groove circumscribing the axis. The movable component is movable between an engaged position, wherein the drive teeth are drivingly engaged with the output teeth, and a disengaged position, wherein the drive teeth are not engaged with the output teeth. An input component is disposed adjacent to the movable component. The input component includes engagement weight pockets. Spherical engagement weights are disposed in each engagement weight pocket. The groove has a generally uniform radial cross section across its circumference.

An apparatus for automatic shifting of a vehicle may include a rotation shaft connected to an output shaft to rotate together; first connecting members each having a first end portion to which a first link disposed on the rotation shaft is hinged and a second end portion to which a centrifugal weight is disposed, to pivot about the first end portions by centrifugal force; second connecting members each having a first end portion hinged to the middle portion of the first connecting member and a second end portion hinged to a second link disposed on the rotation shaft; a slider disposed on the rotation shaft to be coupled to any one of the first link and the second link and sliding in an axial direction of the rotation shaft; and a shift fork connected to the slider to engage a synchronizer with a shift stage gear.

An apparatus for automatic shifting of a vehicle may include a rotation shaft connected to an output shaft to rotate together; first connecting members each having a first end portion to which a first link disposed on the rotation shaft is hinged and a second end portion to which a centrifugal weight is disposed, to pivot about the first end portions by centrifugal force; second connecting members each having a first end portion hinged to the middle portion of the first connecting member and a second end portion hinged to a second link disposed on the rotation shaft; a slider disposed on the rotation shaft to be coupled to any one of the first link and the second link and sliding in an axial direction of the rotation shaft; and a shift fork connected to the slider to engage a synchronizer with a shift stage gear.

A synchronous engagement clutch (SEC) assembly is provided. The SEC assembly includes a starter ball guide and a carrier support. The starter ball guide includes opposed first and second sides and the carrier support includes opposed first and second sides. The first side of the starter ball guide defines an annular groove and the second side of the carrier support defines pockets. The starter ball guide and the carrier support are disposable with the first side of the starter ball guide facing the second side of the carrier support such that engagement balls are retainable in the pockets and the annular groove.

A synchronous engagement clutch (SEC) assembly is provided. The SEC assembly includes a starter ball guide and a carrier support. The starter ball guide includes opposed first and second sides and the carrier support includes opposed first and second sides. The first side of the starter ball guide defines an annular groove and the second side of the carrier support defines pockets. The starter ball guide and the carrier support are disposable with the first side of the starter ball guide facing the second side of the carrier support such that engagement balls are retainable in the pockets and the annular groove.