Electric vehicle
First Claim
1. An electric vehicle comprising:
- a vehicle body;
left and right crawler belts disposed leftward and rightward of the vehicle body, respectively;
left and right electric motors for driving the left and right crawler belts, respectively;
a control unit for controlling the left and right electric motors, separately;
the control unit having;
a turning-side electric motor decelerating control function of, when the electric vehicle turns either leftward or rightward, performing deceleration control to decelerate one of the left and right electric motors disposed on the same side as a turning direction of the electric vehicle; and
a turning-side electric motor accelerating control function of outputting an accelerating control signal for performing acceleration control to accelerate said one electric motor when operation of the electric vehicle is switched from a turning mode to a straight-traveling mode, wherein when said one electric motor has a speed not exceeding a predetermined minimum reference speed at the time of the switching of the operation of the electric vehicle from the turning mode to the straight-traveling mode, the turning-side electric motor accelerating control function performs the acceleration control such that a level of the accelerating control signal is increased abruptly for a temporary time from the switching of the operation of the electric vehicle from the turning mode to the straight-traveling mode.
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Accused Products
Abstract
An electric vehicle includes left and right electric motors for separately driving left and right traveling apparatuses, respectively, and a control unit for controlling the left and right electric motors, separately. When operation of the electric vehicle is switched from a turning mode to a straight-traveling mode if one of the electric motors disposed on the same side as a turning direction of the electric vehicle has a speed not exceeding a predetermined minimum reference speed, the control unit abruptly increases a level of an accelerating control signal for a temporary time from the switching of operation to abruptly accelerate the one electric motor, such that the speed of the one electric motor can be made close to that of the opposite electric motor in a shorter time.
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Citations
11 Claims
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1. An electric vehicle comprising:
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a vehicle body;
left and right crawler belts disposed leftward and rightward of the vehicle body, respectively;
left and right electric motors for driving the left and right crawler belts, respectively;
a control unit for controlling the left and right electric motors, separately;
the control unit having;
a turning-side electric motor decelerating control function of, when the electric vehicle turns either leftward or rightward, performing deceleration control to decelerate one of the left and right electric motors disposed on the same side as a turning direction of the electric vehicle; and
a turning-side electric motor accelerating control function of outputting an accelerating control signal for performing acceleration control to accelerate said one electric motor when operation of the electric vehicle is switched from a turning mode to a straight-traveling mode, wherein when said one electric motor has a speed not exceeding a predetermined minimum reference speed at the time of the switching of the operation of the electric vehicle from the turning mode to the straight-traveling mode, the turning-side electric motor accelerating control function performs the acceleration control such that a level of the accelerating control signal is increased abruptly for a temporary time from the switching of the operation of the electric vehicle from the turning mode to the straight-traveling mode. - View Dependent Claims (2, 3, 4, 5)
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6. An electric vehicle comprising:
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a vehicle body;
left and right traveling apparatuses disposed leftward and rightward of the vehicle body, respectively;
left and right electric motors for driving the left and right traveling apparatuses, respectively;
a control unit for controlling the left and right electric motors, separately;
the control unit having;
a turning-side electric motor decelerating control function of, when the electric vehicle turns either leftward or rightward, performing deceleration control to decelerate one of the left and right electric motors disposed on the same side as a turning direction of the electric vehicle; and
a turning-side electric motor accelerating control function of outputting an accelerating control signal for performing acceleration control to accelerate said one electric motor when operation of the electric vehicle is switched from a turning mode to a straight-traveling mode, wherein when said one electric motor has a speed not exceeding a predetermined minimum reference speed at the time of the switching of the operation of the electric vehicle from the turning mode to the straight-traveling mode, the turning-side electric motor accelerating control function performs the acceleration control such that a level of the accelerating control signal is increased abruptly for a temporary time from the switching of the operation of the electric vehicle from the turning mode to the straight-traveling mode. - View Dependent Claims (7, 8, 9, 10, 11)
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Specification