Vehicle and control method thereof
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorKenji Fukushima
Life of this patent
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Abstract
A vehicle includes a differential gear that transmits rotation of a propeller shaft to an axle. A differential lock switches the differential gear between a locked state and an unlocked state. A clutch is provided in a power transmission path between a prime mover and wheels of the vehicle. A controller controls an engaging force of the clutch during a moving start of the vehicle in accordance with which of the locked state and the unlocked state is selected by the differential gear.
Claims13
A vehicle comprising:
- a prime mover;
- a pair of right and left wheels;
- a propeller shaft that transmits a driving force of the prime mover;
- an axle coupled to the pair of right and left wheels;
- a differential gear that transmits rotation of the propeller shaft to the axle;
- a differential lock that switches the differential gear between a locked state and an unlocked state;
- a clutch provided in a power transmission path between the prime mover and the pair of right and left wheels;
- and
- a controller configured or programmed to control an engaging force of the clutch during a moving start of the vehicle in accordance with which of the locked state and the unlocked state is selected by the differential gear;
- wherein
- the controller is configured or programmed to:
- execute a moving start control to engage the clutch to start the vehicle with a driving force larger than a driving force in a normal mode, in which the moving start control is not executed, by controlling the engaging force of the clutch, when an execution condition of the moving start control is satisfied and the differential gear is in the unlocked state;
- and
- engage the clutch to start the vehicle with a driving force smaller than the driving force in the moving start control and equal to or larger than the driving force in the normal mode by controlling the engaging force of the clutch, when the execution condition of the moving start control is satisfied and the differential gear is in the locked state.
A method of controlling a vehicle including a differential gear that transmits rotation of a propeller shaft to an axle coupled to a pair of right and left wheels, wherein the propeller shaft transmits a driving force of a prime mover, the method comprising the steps of:
- determining which of a locked state and an unlocked state is selected by the differential gear;
- controlling an engaging force of the clutch during a moving start of the vehicle in accordance with which of the locked state and the unlocked state is selected, the clutch being provided in a power transmission path between the prime mover and the pair of right and left wheels;
- executing a moving start control to engage the clutch to start the vehicle with a driving force larger than a driving force in a normal mode, in which the moving start control is not executed, by controlling the engaging force of the clutch, when an execution condition of the moving start control is satisfied and the differential gear is in the unlocked state;
- and
- engaging the clutch to start the vehicle with a driving force smaller than the driving force in the moving start control and equal to or larger than the driving force in the normal mode by controlling the engaging force of the clutch, when the execution condition of the moving start control is satisfied and the differential gear is in the locked state.
Dependencies are inferred from the claim text.