Title:
PISTON TEMPERATURE ESTIMATION DEVICE AND PISTON TEMPERATURE ESTIMATION METHOD
Document Type and Number:
WIPO Patent Application WO/2022/065145
Kind Code:
A1
Abstract:
This piston temperature estimation device comprises: a preliminary estimation unit which calculates a preliminary estimated value of the temperature of a piston that constitutes an internal combustion engine; a determination unit which determines whether or not an exhaust brake of the internal combustion engine is being activated; a rise amount estimation unit which estimates an amount of temperature rise in the piston, the rise resulting from the activation of the exhaust brake; and an estimation unit which estimates, as the temperature of the piston, a value obtained by adding the rise amount estimated by the rise amount estimation unit to the preliminary estimated value calculated by the preliminary estimation unit in the case when the determination unit has determined that the exhaust brake is being activated, and which meanwhile estimates, as the temperature of the piston, the preliminary estimated value calculated by the preliminary estimation unit in the case when the determination unit has determined that the exhaust brake is not being activated.
Inventors:
MITA TAKURO (JP)
Application Number:
PCT/JP2021/033844
Publication Date:
March 31, 2022
Filing Date:
September 15, 2021
Export Citation:
Assignee:
ISUZU MOTORS LTD (JP)
International Classes:
F02D9/06; F02D45/00
Foreign References:
| JP2020051304A | 2020-04-02 | |||
| JPH05195886A | 1993-08-03 | |||
| JPH05215001A | 1993-08-24 | |||
| JPH05141282A | 1993-06-08 | |||
| JP2018193878A | 2018-12-06 | |||
| JP2018193879A | 2018-12-06 | |||
| JP2018131941A | 2018-08-23 |
Attorney, Agent or Firm:
WASHIDA & ASSOCIATES (JP)
Download PDF: