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US 2014/0174066 A1Published application
Control system for a machine with a dual path electronically controlled hydrostatic transmission
AssigneeCNH America LLC
InventorsDavid SCHULTE, Kushan VORA, Bruce ARNDT
Life of this patent
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Abstract
A control system for a machine with a dual path electronically controlled hydrostatic transmission is used to achieve a desired performance and a desired operator feel while performing all of the machine operations. The control system includes pump and motor displacement resolvers, command resolver, ramping blocks, pump and motor steering resolvers, engine load management and a straight tracking subsystem.
Claims20
A method for controlling a machine with an electronically controlled hydrostatic transmission, the method comprising:
- providing a machine having an engine and an electronically controlled hydrostatic transmission, the electronically controlled hydrostatic transmission including an input device, a first drive system and a second drive system, each of the first drive system and the second drive system having at least one pump and at least one motor controlled by a corresponding solenoid, the input device providing propulsion and steering commands for the first drive system and the second drive system;
- generating current commands for the solenoids of the at least one pump and the at least one motor of each of the first drive system and the second drive system based on the propulsion command, the steering command and at least one measured machine operating parameter;
- and
- applying the current commands to the solenoids of the at least one pump and the at least one motor of each of the first drive system and the second drive system.
1 more element
A control system for a machine with a hydrostatic transmission comprising:
- a first drive system comprising:
- a first pump solenoid and a first motor solenoid;
- a first pump controlled by the first pump solenoid;
- and
- a first motor controlled by the first motor solenoid and powered by the first pump;
- a second drive system comprising:
- a second pump solenoid and a second motor solenoid;
- a second pump controlled by the second pump solenoid;
- and
- a second motor controlled by the second motor solenoid and powered by the second pump;
- an operator input device, the operator input device generating a propulsion command and a steering command in response to user manipulation of the operator input device;
- and
- a control device to generate current commands for the first pump solenoid, the first motor solenoid, the second pump solenoid and the second motor solenoid based on the propulsion command, the steering command and at least one system operating parameter.
10 more elements
Dependencies are inferred from the claim text.