Patent ID: 8332089

Claim:
A work vehicle comprising: a travel body comprising wheels on its front and rear, and right and left sides, of which wheels, a front pair or a rear pair of right and left wheels are drive wheels; a steering actuator, which drives a link mechanism that directs said pair of right and left drive wheels, and thereby changes steering angles at said drive wheels; two induction motors, which independently drive said pair of right and left drive wheels, respectively; a battery, which is used for supplying electric power to said two induction motors; an inverter, which converts DC power from said battery to AC power and supplies the AC power to said two induction motors for driving both said two induction motors to rotate; travel-operating means, which is operated for travel control of said travel body; steering-operating means, which is operated to set a turning direction for said travel body; steering-controlling means, which controls operation of said steering actuator such that the steering angles at said drive wheels correspond to operation of said steering-operating means; inverter-controlling means, which controls operation of said inverter to rotate said induction motors at a speed that corresponds to the operation of said travel-operating means; and steering-angle-detecting means, which detects the steering angles at said drive wheels, wherein when a steering is detected by said steering-angle-detecting means, said inverter-controlling means controls the operation of said induction motors through said inverter such that said motors acquire a characteristic that their torque output changes more gradually than otherwise over a corresponding rotational speed change.