Work vehicle and work vehicle control method
First Claim
Patent Images
1. A work vehicle comprising:
- a drive source;
a travel device configured to cause the work vehicle to travel by drive force from the drive source;
a hydraulic pump driven by drive force from the drive source;
a work implement driven by hydraulic fluid from the hydraulic pump;
a traction force detector configured to detect traction force of the work vehicle;
a lift force detector configured to detect a lift force for raising the work implement; and
a controller configured tocalculate a ratio of the traction force detected by the traction force detector with respect to the lift force detected by the lift force detector, or a ratio of the lift force detected by the lift force detector with respect to the traction force detected by the traction force detector,compare the calculated ratio to a prescribed threshold value, andexecute traction force reduction control for reducing the traction force upon a first execution condition being satisfied, the first execution condition being satisfied when the calculated ratio of the traction force with respect to the lift force is larger than the predetermined threshold value, or when the calculated ratio of the lift force with respect to the traction force is smaller than the predetermined threshold value.
1 Assignment
0 Petitions
Accused Products
Abstract
A work vehicle includes a drive source, a travel device, a hydraulic pump, a work implement, a traction force detector, a lift force detector and a controller. The traction force detector is configured to detect traction force of the work vehicle. The lift force detector is configured to detect lift force for raising the work implement. The controller is configured to compare a predetermined threshold and a ratio between the lift force and the traction force, and to execute traction force reduction control for reducing the traction force when an increase in the lift force is required.
-
Citations
12 Claims
-
1. A work vehicle comprising:
-
a drive source; a travel device configured to cause the work vehicle to travel by drive force from the drive source; a hydraulic pump driven by drive force from the drive source; a work implement driven by hydraulic fluid from the hydraulic pump; a traction force detector configured to detect traction force of the work vehicle; a lift force detector configured to detect a lift force for raising the work implement; and a controller configured to calculate a ratio of the traction force detected by the traction force detector with respect to the lift force detected by the lift force detector, or a ratio of the lift force detected by the lift force detector with respect to the traction force detected by the traction force detector, compare the calculated ratio to a prescribed threshold value, and execute traction force reduction control for reducing the traction force upon a first execution condition being satisfied, the first execution condition being satisfied when the calculated ratio of the traction force with respect to the lift force is larger than the predetermined threshold value, or when the calculated ratio of the lift force with respect to the traction force is smaller than the predetermined threshold value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A method for controlling a work vehicle including a drive source, a travel device for causing the work vehicle to travel by a drive force from the drive source, a hydraulic pump driven by the drive force from the drive source, and a work implement driven by hydraulic fluid from the hydraulic pump, the method comprising:
-
detecting traction force of the work vehicle; detecting a lift force for raising the work implement; calculating a ratio of the traction force with respect to the lift force, or a ratio of the lift force with respect to the traction force; comparing the calculated ratio to a prescribed threshold value; and executing traction force reduction control for reducing traction force when the ratio of the traction force with respect to the lift force is larger than the predetermined threshold value or the ratio of the lift force with respect to the traction force is smaller than the predetermined threshold value.
-
Specification