The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 29, 2013
Filed:
Jun. 21, 2010
Jong Min Kang, Changwon-si, KR;
Ahn Kyun Jung, Changwon-si, KR;
Jae Hong Kim, Gimhae-si, KR;
Chun Han Lee, Gimhae-si, KR;
Jung Sun JO, Changwon-si, KR;
Jong Min Kang, Changwon-si, KR;
Ahn Kyun Jung, Changwon-si, KR;
Jae Hong Kim, Gimhae-si, KR;
Chun Han Lee, Gimhae-si, KR;
Jung Sun Jo, Changwon-si, KR;
Volvo Construction Equipment Holding Sweden AB, Eskilstuna, SE;
Abstract
A system and method for controlling engine revolutions for a hybrid construction machine is provided. The system for controlling engine revolutions for a hybrid construction machine, including an engine, a hydraulic pump which is driven by the engine to drive a hydraulic actuator with discharged hydraulic fluid, a motor-generator which is driven by the engine to generate electricity and to drive the hydraulic pump as a motor supplementing the engine, an energy storage device which is charged with electric energy generated by the motor-generator and which supplies the electric energy for motor operation of the motor-generator, a torque detection means for detecting an output torque of the hydraulic pump that is required to drive the hydraulic actuator, and a hybrid control means for controlling the motor operation of the motor-generator so as to supplement the engine output if the change of the output torque of the hydraulic pump detected by the torque detection means exceeds a predetermined level and it is determined that an engine revolution drop will occur.