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US 2015/0176252 A1Published application
System and method of controlling vehicle of construction equipment
AssigneeDoosan Infracore Co., Ltd.
InventorsDong Mok KIM, Lee Hyoung CHO
Life of this patent
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Abstract
The present disclosure relates to a system and method of controlling a vehicle of construction equipment, which calculate a target engine torque from compensation torque information using torque information generated in a hydraulic pump and an engine speed error and transmit the calculated target engine torque, thereby more stably performing engine control while responding to a rapid load variation of the hydraulic pump.
Claims20
A system for controlling a vehicle of construction equipment, comprising:
- an engine;
- a hydraulic pump operated by power supplied from the engine;
- one or more actuators driven by a hydraulic pressure discharged from the hydraulic pump;
- a hydraulic pump control device configured to calculate a compensation torque according to a hydraulic pump torque and an engine speed error between an actual engine RPM and a target engine RPM, compensate for the calculated hydraulic pump torque with the calculated compensation torque, and output the compensated torque as a target engine torque;
- and
- an engine control unit configured to control a torque of the engine based on the output target engine torque.
3 more elements
A method of controlling a vehicle of construction equipment, comprising:
- calculating a hydraulic pump torque by using a discharge capacity and a discharge pressure of the hydraulic pump;
- calculating an engine speed error between an actual engine RPM and a target engine RPM;
- calculating a compensation torque by using the calculated hydraulic pump torque and the calculated engine speed error;
- compensating for the calculated hydraulic pump torque with the calculated compensation torque, and outputting the compensated torque as a target engine torque;
- and
- controlling a torque of an engine based on the output engine target torque.
3 more elements
Dependencies are inferred from the claim text.