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:
Aug. 25, 2026
Filed:
Aug. 19, 2022
Caterpillar Sarl, Geneva, CH;
Hideki Nakajima, Akashi, JP;
Toshikazu Koga, Akashi, JP;
Caterpillar SARL, Geneva, CH;
Abstract
PROBLEM: To enable accurately controlling and managing by means of software, a relief pressure of a pump oil passage supplied with a discharge oil of a hydraulic pump. SOLUTION: There are provided a target engine torque setting/calibration unit () during relief configured to detect an engine torque in a state where a pump flow rate is regulated so that a detected pressure value of a pump oil passage () during the relief reaches a target relief pressure (LPt), and to set and calibrate the detected engine torque as a target engine torque (LTt) during relief, and a control unit () during relief configured to control a pump flow rate so that the detected value of the engine torque reaches the target engine torque (LTt) during the relief.