Air Fuel Ratio Control Device

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.

Patent Information

Application #

Filing Date

23 October 2023

Publication Number

50/2023

Publication Type

INA

Invention Field

MECHANICAL ENGINEERING

Status

Email

Parent Application

Applicants

HITACHI ASTEMO, LTD.

2520, Takaba, Hitachinaka-shi, Ibaraki 3128503

Inventors

1. ICHIHASHI Satoshi

c/o Hitachi Astemo, Ltd., 2520, Takaba, Hitachinaka-shi, Ibaraki 3128503

Specification

Documents

Application Documents

#	Name	Date
1	202347072197-STATEMENT OF UNDERTAKING (FORM 3) [23-10-2023(online)].pdf	2023-10-23
2	202347072197-PROOF OF RIGHT [23-10-2023(online)].pdf	2023-10-23
3	202347072197-PRIORITY DOCUMENTS [23-10-2023(online)].pdf	2023-10-23
4	202347072197-FORM 18 [23-10-2023(online)].pdf	2023-10-23
5	202347072197-FORM 1 [23-10-2023(online)].pdf	2023-10-23
6	202347072197-DRAWINGS [23-10-2023(online)].pdf	2023-10-23
7	202347072197-DECLARATION OF INVENTORSHIP (FORM 5) [23-10-2023(online)].pdf	2023-10-23
8	202347072197-COMPLETE SPECIFICATION [23-10-2023(online)].pdf	2023-10-23
9	202347072197-FORM-26 [26-12-2023(online)].pdf	2023-12-26
10	202347072197-FORM 3 [08-04-2024(online)].pdf	2024-04-08