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:
Nov. 07, 2023
Filed:
Apr. 17, 2019
Caterpillar Sarl, Geneva, CH;
Atsunori Shimamoto, Akashi, JP;
Naoki Sawada, Akashi, JP;
Caterpillar SARL, Geneva, CH;
Abstract
Providing high accuracy calibration of a pump control table when variable capacity of a hydraulic pump is controlled based on a pump control table representing the relationship between pump capacity and current command value. The calibration: acquires data by measuring pump pressure corresponding to each current command value while changing the current command value in a multi-step manner; obtains a factor K representing a relationship between pump pressure and pump flow rate; creates a first table representing a relationship between the factor K and pump pressure; creates a second table representing a relationship between current command value and pump pressure; creates a third table representing a relationship between pump flow rate and current command value according to factor K; and creates a pump control table representing a relationship between pump capacity and current command value through engine rotation speed during pump pressure measurement.