Apparatus for controlling tilt of axle for industrial vehicle, a

Details Apparatus for controlling tilt of axle for industrial vehicle, a Apparatus for controlling tilt of axle for industrial vehicle, a

1998-04-16

2000-07-04

English, Peter C.

Land vehicles

Suspension modification enacted during travel

Lateral vehicle disposition

280124112, 280755, 180290, 701 38, 701124, B60G 902, B60G 17005

Patent

active

060827424

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.

REFERENCES:
patent: 4221530 (1980-09-01), Williams, IV et al.
patent: 4393959 (1983-07-01), Acker
patent: 4511974 (1985-04-01), Nakane et al.
patent: 4734006 (1988-03-01), Krob et al.
patent: 5639119 (1997-06-01), Plate et al.
patent: 5947516 (1999-09-01), Ishikawa

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