Dump truck pitching control system
First Claim
1. A dump truck pitching control system applied to a dump truck including:
- a rear wheel drive device including at least one motor; and
four suspensions including four suspension cylinders in which gas and oil are enclosed and which alleviate shocks to a vehicle body during traveling and couple front, rear, left and right wheels to the vehicle body, the system controlling a pitching movement of the vehicle body, and comprising;
a pitching state amount detection section that detects a state amount of the pitching movement of the vehicle body;
stroke sensors that detect strokes of the suspension cylinders;
pressure sensors that detect pressures in the suspension cylinders;
temperature sensors that detect temperatures in the suspension cylinders;
a spring characteristics calculation section that calculates spring characteristics of the suspension cylinders, based on detection results of the stroke sensors, the pressure sensors, and the temperature sensors;
a pitching target amount calculation section that calculates a target amount of the pitching movement of the vehicle body, according to the spring characteristics calculated by the spring characteristics calculation section; and
a torque correction value calculation section that calculates a torque correction value required to correct the pitching amount, according to the spring characteristics calculated by the spring characteristics calculation section,wherein the torque correction value calculation section calculates the torque correction value according to a difference between a state amount of the pitching movement of the vehicle body detected by the pitching state amount detection section and the target amount of the pitching movement of the vehicle body calculated by the pitching target amount calculation section, and outputs the calculated torque correction value, and the rear wheel drive device receives an output of the torque correction value calculation section, and increases and reduces a drive torque.
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Accused Products
Abstract
A dump truck pitching control system that can improve the ride quality of a vehicle body and the drive stability during traveling is provided. The present invention includes: a pitching state amount detection section 194 that detects a state amount of the pitching movement of the vehicle body 10; a spring characteristics calculation section 197 that calculates spring characteristics of suspension cylinders 30, based on detection results of stroke sensors 306, pressure sensors 307, and temperature sensors 308; a pitching target amount calculation section 192 that calculates a target amount of the pitching movement of the vehicle body 10, according to the spring characteristics calculated by the spring characteristics calculation section 197; and a torque correction value calculation section 193 that calculates a torque correction value required to correct the pitching amount, according to the spring characteristics calculated by the spring characteristics calculation section 197.
6 Citations
3 Claims
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1. A dump truck pitching control system applied to a dump truck including:
- a rear wheel drive device including at least one motor; and
four suspensions including four suspension cylinders in which gas and oil are enclosed and which alleviate shocks to a vehicle body during traveling and couple front, rear, left and right wheels to the vehicle body, the system controlling a pitching movement of the vehicle body, and comprising;a pitching state amount detection section that detects a state amount of the pitching movement of the vehicle body; stroke sensors that detect strokes of the suspension cylinders; pressure sensors that detect pressures in the suspension cylinders; temperature sensors that detect temperatures in the suspension cylinders; a spring characteristics calculation section that calculates spring characteristics of the suspension cylinders, based on detection results of the stroke sensors, the pressure sensors, and the temperature sensors; a pitching target amount calculation section that calculates a target amount of the pitching movement of the vehicle body, according to the spring characteristics calculated by the spring characteristics calculation section; and a torque correction value calculation section that calculates a torque correction value required to correct the pitching amount, according to the spring characteristics calculated by the spring characteristics calculation section, wherein the torque correction value calculation section calculates the torque correction value according to a difference between a state amount of the pitching movement of the vehicle body detected by the pitching state amount detection section and the target amount of the pitching movement of the vehicle body calculated by the pitching target amount calculation section, and outputs the calculated torque correction value, and the rear wheel drive device receives an output of the torque correction value calculation section, and increases and reduces a drive torque. - View Dependent Claims (2, 3)
- a rear wheel drive device including at least one motor; and
Specification