System and method for controlling a maximum vehicle speed for an industrial vehicle based on a calculated load

Patent metadata

Field	Value
Publication number	US-11945705-B2
Application number	US-202117456231-A
Country	US
Kind code	B2
Filing date	Nov 23, 2021
Priority date	Sep 13, 2018
Publication date	Apr 2, 2024
Grant date	Apr 2, 2024

Abstract

Controlling a maximum vehicle speed for an industrial vehicle includes determining, by a processor of the industrial vehicle, a torque applied to the traction wheel of the industrial vehicle; converting the torque to an equivalent force value; and determining an acceleration of the industrial vehicle while the torque is applied to the traction wheel. Additional steps include calculating a load being moved by the industrial vehicle, based at least in part on the acceleration and the equivalent force value; and controlling the maximum speed of the industrial vehicle based on the calculated load being moved by the industrial vehicle.

First claim

What is claimed is:

1. A method for controlling a maximum vehicle speed for an industrial vehicle, comprising:
determining, by a processor of the industrial vehicle, a torque applied to a traction wheel of the industrial vehicle;
determining, by the processor of the industrial vehicle, an acceleration of the industrial vehicle while the torque is applied to the traction wheel;
based at least in part on the acceleration and the torque applied to the traction wheel, calculating, by the processor of the industrial vehicle, a load being moved by the industrial vehicle; and
controlling, by the processor of the industrial vehicle, the maximum speed of the industrial vehicle based on the calculated load being moved by the industrial vehicle,
wherein calculating the load comprises:
calculating a set comprising a predetermined number of individual load values of the load being moved by the industrial vehicle in response to the industrial vehicle accelerating above a first predefined value and traveling at least a predetermined distance; and
averaging the predetermined number of individual values to determine a respective set load value for the set;
wherein no further individual load values are calculated after the respective set load value for the set is determined until at least one of the following vehicle conditions is met:
a) an acceleration of the industrial vehicle is less than the first predefined value, or
b) a speed of the industrial vehicle is less than a second predefined value.

2. The method as set out in claim 1 , wherein no further individual load values are calculated until at least both of the vehicle conditions are met.

Assignees

• Crown Equip Corp

Inventors

• Hammer Joe K
• Addison Mark E

Classifications

• B66F9/07559 Primary

  Stabilizing means · CPC title

• B60W40/105

  Speed · CPC title

• B60W40/13

  Load or weight · CPC title

• B60W50/12

  Limiting control by the driver depending on vehicle state, e.g. interlocking means for the control input for preventing unsafe operation · CPC title

• B60W2300/121

  Fork lift trucks, Clarks · CPC title