Industrial vehicle
First Claim
1. An industrial vehicle including a vehicle body comprising:
- a battery mounted on the vehicle body;
an electric motor driven by electric power from the battery to generate torque, the electric motor being a traction motor by which the industrial vehicle is driven to travel;
an electrolyte level sensor detecting whether or not electrolyte level of the battery is lower than a predetermined level;
a vehicle operating time with lowered electrolyte level being a time elapsing while the industrial vehicle is in a key-on state and the electrolyte level is lower than the predetermined level;
a vehicle operating time calculator counting the vehicle operating time with lowered electrolyte level in accordance with the detection of the electrolyte level by the electrolyte level sensor;
a data-storing device storing data of the vehicle operating time with lowered electrolyte level;
an electric motor limiting condition for limiting operation of the electric motor gradually in accordance with the vehicle operating time with lowered electrolyte level; and
a motor controller controlling operation of the electric motor based on the electric motor limiting condition.
1 Assignment
0 Petitions
Accused Products
Abstract
An industrial vehicle having a vehicle body includes a battery, an electric motor, an electrolyte level sensor, a vehicle operating with lowered electrolyte level, a vehicle operating time calculator, a data-storing device storing data of the vehicle operating time, an electric motor limiting condition and a motor controller. The electric motor is driven to generate torque. The electrolyte level sensor detects whether or not electrolyte level of the battery is lower than a predetermined level. The vehicle operating time is a time elapsing while the electrolyte level is lower than the predetermined level. The vehicle operating time calculator counts the vehicle operating time in accordance with the detection of the electrolyte level. The electric motor limiting condition limits operation of the electric motor gradually in accordance with the vehicle operating time. The motor controller controls operation of the electric motor based on the electric motor limiting condition.
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Citations
11 Claims
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1. An industrial vehicle including a vehicle body comprising:
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a battery mounted on the vehicle body; an electric motor driven by electric power from the battery to generate torque, the electric motor being a traction motor by which the industrial vehicle is driven to travel; an electrolyte level sensor detecting whether or not electrolyte level of the battery is lower than a predetermined level; a vehicle operating time with lowered electrolyte level being a time elapsing while the industrial vehicle is in a key-on state and the electrolyte level is lower than the predetermined level; a vehicle operating time calculator counting the vehicle operating time with lowered electrolyte level in accordance with the detection of the electrolyte level by the electrolyte level sensor; a data-storing device storing data of the vehicle operating time with lowered electrolyte level; an electric motor limiting condition for limiting operation of the electric motor gradually in accordance with the vehicle operating time with lowered electrolyte level; and a motor controller controlling operation of the electric motor based on the electric motor limiting condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification