Title:
CONTROL DEVICE, INTERNAL COMBUSTION ENGINE SYSTEM, AND DIAGNOSTIC METHOD
Document Type and Number:
WIPO Patent Application WO/2021/235368
Kind Code:
A1
Abstract:
With this control device, internal combustion engine system, and diagnostic method, it is possible to detect valve abnormalities early and accurately. The control device is a control device for an internal combustion engine system comprising an exhaust line having a valve device of which the opening degree is controlled, said control device comprising: an acquisition unit that acquires a parameter indicating the status of the internal combustion engine system when exhaust temperature increases due to the opening degree being controlled; a calculation unit that calculates the average value of a plurality of the acquired parameters; and a determination unit that determines whether or not the calculated average value or a predetermined value calculated on the basis of the average value exceeds a predetermined threshold value, and determines that the valve device is abnormal when the number of times the average value or the predetermined value exceeds the predetermined threshold value is greater than a predetermined number of times.
Inventors:
KOSUGI KIYOAKI (JP)
ARAKI HIRONORI (JP)
ISHIKAWA KAZUTO (JP)
ARAKI HIRONORI (JP)
ISHIKAWA KAZUTO (JP)
Application Number:
PCT/JP2021/018497
Publication Date:
November 25, 2021
Filing Date:
May 14, 2021
Export Citation:
Assignee:
ISUZU MOTORS LTD (JP)
International Classes:
F02D9/06; F02D9/04; F02D45/00
Foreign References:
| JP2019138196A | 2019-08-22 | |||
| JP2008215168A | 2008-09-18 | |||
| CN107524528A | 2017-12-29 |
Attorney, Agent or Firm:
WASHIDA & ASSOCIATES (JP)
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