Crown Equipment Corporation

Karl L Dammeyer

Darrin R Ihle

Lucas B Waltz

Marc A McClain

Eric D Holbrook

Marc A Mcclain

Mark E Addison

Stephen Mangette

Joe K Hammer

William C Jones

Walter Conley, Iii

Cole Steinbrunner

Nicholas D Thobe

David J Obringer

Stephen T Mangette

Cole T Steinbrunner

Walter Iii Conley

Lucas B Walt

Walter Conley

A module capable of operating on one of first and second vehicles includes an input table having a superset of input elements, with a first subset of input elements related to a first set of hardware devices on the first vehicle and a second subset related to a second set of hardware devices on the second vehicle. The module includes at least one configuration table with configuration elements corresponding to ones of the superset of input elements, wherein each configuration element has data related to transforming a value associated with an input element. The module includes vehicle function input elements related to function inputs utilized on the vehicles; and structure for determining a value of an input element corresponding to a function input element, transforming the value to a transformed value and linking the transformed value with the corresponding function input element.

Vehicle control module with signal switchboard and input tables

A control module capable of operating on one of first and second vehicles can include a) a module output table comprising a superset of module output elements comprising a first subset of module output elements related to a first set of hardware devices provided on the first vehicle and a second subset of module output elements related to a second set of hardware devices provided on the second vehicle; b) vehicle function output elements related to vehicle function outputs utilized on the first and second vehicles; and c) a configuration table comprising configuration elements corresponding to the module output elements. The module can also include computer-based structure for determining a value of a vehicle function output element corresponding to a module output element of the module output table, transforming the value to the transformed value, and storing the transformed value based on the corresponding module output element.

Vehicle control module with signal switchboard and output tables

A materials handling vehicle is provided comprising: a support structure including a first 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 first 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 ram/cylinder assembly. The control structure may estimate a speed of the movable assembly from a speed of the motor and may control the operation of the at least one valve using a comparison involving the estimated movable assembly speed and a determined speed, and the comparison may not involve use of an operator commanded speed.

Materials handling vehicle estimating a speed of a movable assembly from a lift motor speed

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 estimate a speed of the movable assembly from a speed of the motor and control the operation of the at least one valve using the estimated movable assembly speed.

Materials handling vehicle monitoring a pressure of hydraulic fluid within a hydraulic structure

A method for operating a materials handling vehicle includes activating the materials handling vehicle and performing a warm up cycle. During the warm up cycle, energy is provided to at least one valve within the materials handling vehicle so as to energize the valve without providing a working fluid to the valve. Providing energy to the at least one valve effects a heating of oil located within the at least one valve.

Warm up cycle for a materials handling vehicle

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.

Materials handling vehicle measuring electric current flow into/out of a hydraulic system motor

A materials handling vehicle is provided comprising: a power unit; a work assembly coupled to the power unit comprising a first auxiliary device; and a fluid supply system. The fluid supply system may comprise: pump structure for supplying a fluid; a first manifold apparatus located on the power unit; a second manifold apparatus located on the work assembly; and fluid supply line structure coupled between the first and second manifolds. The first manifold may receive fluid from the pump structure and comprise valve structure for maintaining fluid pressure at an output port of the first manifold apparatus at a commanded pressure substantially equal to or greater than an operating pressure of the first auxiliary device.

Materials handling vehicle having a manifold located on a power unit for maintaining fluid pressure at an output port at a commanded pressure corresponding to an auxiliary device operating pressure

A materials handling vehicle is provided including: 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 includes 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 estimate a speed of the movable assembly from a speed of the motor and calculate an updated pump volumetric efficiency using the estimated movable assembly speed and a determined movable assembly speed.

A materials handling vehicle is provided comprising: a base; a carriage assembly movable relative to the base; at least one cylinder coupled to the base to effect movement of the carriage assembly relative to the base; and a hydraulic system to supply a pressurized fluid to the cylinder. The hydraulic system includes an electronically controlled valve coupled to the cylinder. The vehicle further comprises control structure to control the operation of the valve such that the valve is closed in the event of an unintended descent of a carriage assembly in excess of a commanded speed.

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St. Marys, OH, United States of America

Karl L Dammeyer