Patent · US Active

Control device and working machine

US10407874B2 · kind B2 · utility

0Cited by

7References

6Claims

0Family size

Assignee

Caterpillar SARL · CH

Inventors

Shigeo Kajita · Tokyo, JP
Kouji Kishida · Tokyo, JP
Yoshihiko Hata · Tokyo, JP
Nobuaki Matoba · Tokyo, JP

Key dates

Filing date	Apr 17, 2015
Grant date	Sep 10, 2019
Priority date	—
Expiry date	Jan 19, 2036

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF15B2211/765
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A control device for suppressing engine load fluctuation according to main pump circuit conditions, wherein an assist torque calculation task includes a target engine torque calculation task separating smooth torque components from main pump load torque and setting a minimum value of either smooth torque component or engine setting torque as target engine torque, and a subtractor calculating target assist torque based on a difference between the main pump load torque and the target engine torque, the assist torque calculation task controlling a capacity of an assist pump based on the target assist torque and controlling switching between an assist mode and a charge mode.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.