Apparatus for controlling tilt of axle for industrial vehicle, and apparatus and method for estimating center of gravity for industrial vehicle
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 4, 2000
Grant Date -
N/A
app pub date -
Apr 16, 1998
filing date -
Jun 11, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for controlling the tilt of a rear axle of a forklift is disclosed. A locking mechanism, which includes a hydraulic damper and a shutoff valve, locks the rear axle against tilt. A controller determines that a locking condition for locking the rear axle is satisfied when at least one of the centrifugal acceleration acting on the forklift and the rate of change of the yaw rate is equal to or greater than a predetermined determination value. The controller estimates the location of the center of gravity in the fore-and-aft direction of the forklift based on the tilt angle of a forks, the height of the forks and weight of an object on the forks. When determining that the driving force of the drive wheels is not sufficiently transmitted to the road surface based on the estimated location of the center of gravity, the controller does not permit the locking of the rear axle even if the locking condition is satisfied.
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