MATERIALS HANDLING VEHICLE MEASURING ELECTRIC CURRENT FLOW INTO/OUT OF A HYDRAULIC SYSTEM MOTOR

摘要

A materials handling vehicle is provided comprising: a support structure including a fixed member; a movable assembly coupled to the support structure; a hydraulic system; and a control system. The support structure further comprises lift apparatus to effect movement of the movable assembly relative to the support structure fixed member. The lift apparatus includes at least one ram/cylinder assembly. The hydraulic system includes a motor, a pump coupled to the motor to supply a pressurized fluid to the at least one ram/cylinder assembly, and at least one electronically controlled valve associated with the at least one ram/cylinder assembly. The control structure may measure an electric current flow into and/or out of the hydraulic system motor and reduce an operating speed of the hydraulic system motor if the electric current flow into and/or out of the hydraulic system motor is greater than or equal to a predetermined threshold value.

主权项

1. A materials handling vehicle comprising:
a support structure including a fixed member; a movable assembly coupled to said support structure; said support structure further comprising lift apparatus to effect movement of said movable assembly relative to said support structure fixed member, said lift apparatus including at least one ram/cylinder assembly; a hydraulic system including a motor and a pump coupled to said motor to supply a pressurized fluid to said at least one ram/cylinder assembly; and control structure to measure an electric current flow into and/or out of said hydraulic system motor and to reduce an operating speed of said hydraulic system motor if the electric current flow into and/or out of said hydraulic system motor is greater than or equal to a predetermined threshold value.