Patent ID: 6425728
Filing Date: 2002-07-30
Classification: B66F

Abstract:
A tilt speed control apparatus for an industrial vehicle, the apparatus comprising:a mast pivotally supported on a body frame; a load carrier supported by the mast, wherein the load carrier is lifted and lowered and is constructed to carry a load; a tilt cylinder for tilting the mast; a pump for sending hydraulic oil to the tilt cylinder; a motor for driving the pump; an operating member that is actuated to tilt the mast; an operating detector for detecting that the operating member has been actuated; a position detector for producing a signal relating to the height of the load carrier; a controller for controlling the motor, wherein, when the operating detector detects that the operating member has been actuated, the controller controls the motor according to the signal such that the speed of the motor is relatively low when the position of the load carrier is relatively high, wherein the controller stores control data, which represent the relationship between the motor torque and the motor speed in accordance with the position of the carrier, wherein the controller selects data that corresponds to the position detected by the position detector, and the controller controls the motor based on the selected data.