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:
Jul. 21, 2015
Filed:
Dec. 18, 2012
Caterpillar Inc., Peoria, IL (US);
Jiao Zhang, Naperville, IL (US);
Pengfei Ma, Naperville, IL (US);
Tonglin Shang, Bolingbrook, IL (US);
Rustu Cesur, Lombard, IL (US);
Bryan J. Hillman, Peoria, IL (US);
Peter Spring, Reutigen, CH;
Lawrence J. Tognetti, Peoria, IL (US);
Randal N. Peterson, Peoria, IL (US);
Dayao Chen, Bolingbrook, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A hydraulic control system is disclosed for use with a machine. The hydraulic control system may have a tank, a pump, a swing motor, and at least one control valve configured to control fluid flow between the pump, the swing motor, and the tank. The hydraulic system may also have an accumulator configured to selectively receive pressurized fluid discharged from the swing motor and selectively supply pressurized fluid to the swing motor, at least one accumulator valve, and a controller. The controller may be configured to receive input indicative of a difference between desired and actual speeds of the swing motor, and determine if the swing motor is accelerating or decelerating based on the difference. The controller may also be configured to control the at least one accumulator valve to cause the accumulator to selectively receive or supply pressurized fluid only when the swing motor is accelerating or decelerating.