Title:
FAILURE DETECTION DEVICE
Document Type and Number:
Japanese Patent JP2018173001
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To accurately detect a failure of a supercharger system.SOLUTION: A controller 30 detects a pump load of a hydraulic pump 23 from a pump pressure detected by a pump pressure sensor S1 and pump capacity of the hydraulic pump 23. The controller 30 determines an estimation value of the pump load corresponding to rotational frequency detected by a rotational frequency sensor S3 and a boost pressure detected by a boost pressure sensor S2 by referring to corresponding information stored beforehand in a storage section. When a deviation of the determined estimation value of the pump load from the detected pump load is larger than a reference value, the controller 30 determines that a supercharger system has been broken and performs notification of determination.SELECTED DRAWING: Figure 2
Inventors:
OKA HIDEKAZU
Application Number:
JP2017070395A
Publication Date:
November 08, 2018
Filing Date:
March 31, 2017
Export Citation:
Assignee:
KOBELCO CONTSTRUCTION MACHINERY LTD
International Classes:
F02B39/16; F02B37/12; F02D29/00; F02D29/02; F02D43/00; F02D45/00
Domestic Patent References:
| JP2016041924A | 2016-03-31 | |||
| JP2016109019A | 2016-06-20 | |||
| JP2007303294A | 2007-11-22 | |||
| JP2006063873A | 2006-03-09 | |||
| JP2011185263A | 2011-09-22 | |||
| JP2010169032A | 2010-08-05 |
Foreign References:
| WO2015025537A1 | 2015-02-26 |
Attorney, Agent or Firm:
Etsushi Kotani
Masataka Otani
Koji Nishitani
Masataka Otani
Koji Nishitani