Motor control device for working vehicle
First Claim
1. A motor control device for a working vehicle, comprising:
- a rotational speed control device that controls a rotational speed of a motor in accordance with an operation amount of an accelerator pedal;
a travel drive device that transmits rotation of the motor to wheels through a torque converter and a transmission;
a speed ratio detection device that detects a speed ratio of an input shaft and an output shaft of the torque converter; and
a speed restriction device that restricts the maximum rotations speed of the motor in accordance with a speed ratio detected by the speed ratio detection device;
wherein;
the speed restriction device reduces the maximum rotational speed by a restriction amount, wherein a value of an acceleration region restriction amount, which is set when a detected speed ratio is equal to or less than 1 and in the acceleration region of the rotational speed of the motor in which the detected speed ratio is equal to or greater than a first predetermined value and less than a second predetermined value which is greater than the first predetermined value, is greater than a value of a non-acceleration region restriction amount which is set when a detected speed ratio is equal to or less than 1 and in the non-acceleration region in which the detected speed ratio is less than the first predetermined value or equal to or greater than the second predetermined value.
3 Assignments
0 Petitions
Accused Products
Abstract
A working vehicle motor control device includes: a rotational speed control device that controls a motor rotational speed in accordance with an operation amount of an accelerator pedal; a travel drive device that transmits rotation of the motor to wheels through a torque converter and a transmission; a speed ratio detection device that detects a speed ratio of an input shaft and an output shaft of the torque converter; and a speed restriction device that restricts a maximum rotational speed of the motor in accordance with a speed ratio detected by the speed ratio detection device. In the working vehicle motor control device, the speed restriction device restricts the maximum rotational speed when a detected speed ratio is in an acceleration region of the motor rotational speed to less than the maximum rotational speed when a detected speed ratio is in a non-acceleration region.
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Citations
7 Claims
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1. A motor control device for a working vehicle, comprising:
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a rotational speed control device that controls a rotational speed of a motor in accordance with an operation amount of an accelerator pedal; a travel drive device that transmits rotation of the motor to wheels through a torque converter and a transmission; a speed ratio detection device that detects a speed ratio of an input shaft and an output shaft of the torque converter; and a speed restriction device that restricts the maximum rotations speed of the motor in accordance with a speed ratio detected by the speed ratio detection device;
wherein;the speed restriction device reduces the maximum rotational speed by a restriction amount, wherein a value of an acceleration region restriction amount, which is set when a detected speed ratio is equal to or less than 1 and in the acceleration region of the rotational speed of the motor in which the detected speed ratio is equal to or greater than a first predetermined value and less than a second predetermined value which is greater than the first predetermined value, is greater than a value of a non-acceleration region restriction amount which is set when a detected speed ratio is equal to or less than 1 and in the non-acceleration region in which the detected speed ratio is less than the first predetermined value or equal to or greater than the second predetermined value. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification