Patent ID: 8626416

Claim:
A traction controlling apparatus, comprising: a grip opening sensor configured to detect a manipulation opening of an acceleration grip; a throttle-by-wire controlling unit configured to drive an actuator in response to the manipulation opening of the acceleration grip to control an opening of a throttle valve; a slip detection unit configured to detect a slip state of a driving wheel; a fail detection unit configured to detect failure of an engine controlling system; a throttle reduction unit configured to reduce the throttle valve opening to a first predetermined value by the throttle-by-wire controlling unit in response to detection of a slip state; and a traction fail controlling unit configured to decrease, by the throttle-by-wire controlling unit, lower than the first predetermined value, when failure of the engine controlling system is detected while the throttle valve opening is reduced to the first predetermined value, wherein when it is detected that predetermined closing manipulation is carried out for the acceleration grip during a traction fail process in which the throttle valve opening is reduced to the second predetermined value by the traction fail controlling unit, the traction fail process is ended and throttle control based on the throttle valve opening in response to the acceleration manipulation opening is enabled.