Title:
空燃比制御装置
Document Type and Number:
Japanese Patent JP7437341
Kind Code:
B2
Abstract:
Provided is an air-fuel ratio control device that improves availability by extending a yield temperature range in the feedback control of an excess air factor. The air-fuel ratio control device comprises an activity determination unit (53) that allows the execution of feedback control via a PI control unit (50) or a PD/PID control unit (49) when a temperature T of a sensor element (12a) is higher than a first temperature t1 and lower than a fourth temperature t4. If the activity determination unit (53) allows the execution of the feedback control, a control-unit selection unit (51) selects PD/PID control as feedback control when the temperature T is higher than a second temperature t2 and lower than a third temperature t3, and selects the PI control unit when the temperature T is lower than the second temperature t2 or higher than the third temperature t3.
Inventors:
Tetsushi Ichihashi
Application Number:
JP2021052965A
Publication Date:
February 22, 2024
Filing Date:
March 26, 2021
Export Citation:
Assignee:
Hitachi Astemo, Ltd.
International Classes:
F02D43/00; F02D41/14; F02D45/00
Domestic Patent References:
| JP7A | ||||
| JP60164240A | ||||
| JP2145954A | ||||
| JP932608A |
Attorney, Agent or Firm:
Deloitte Tohmatsu Patent Attorneys Corporation