Title:
EXCESS AIR RATIO CALCULATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/181209
Kind Code:
A1
Abstract:
Provided is an excess air ratio calculation device with which it is possible to reduce interruptions in a PID control when controlling the excess air ratio, thereby improving the control efficiency. This excess air ratio calculation device comprises an excess ratio calculation unit (25) which calculates an excess air ratio λ, and a torque contribution setting unit (44) which sets a torque contribution Tc. The device stores a fuel injection duration Ti1, a stored torque value TQ1, and a stored excess air ratio λb when a voltage value VHG is at most a lean threshold LREF and, when the voltage value VHG exceeds the lean threshold LREF, uses the fuel injection duration as Ti2 and a torque value of an internal combustion engine as TQ2, and treats a substitution value R which is determined using the following equation as the excess air ratio λ. R=((Ti1÷Ti2)÷(TQ1÷TQ2))×λb×Tc
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| WO/2009/154065 | INTERNAL COMBUSTION ENGINE CONTROLLER |
Inventors:
WACHI KATSUAKI (JP)
Application Number:
PCT/JP2022/013667
Publication Date:
September 28, 2023
Filing Date:
March 23, 2022
Export Citation:
Assignee:
HITACHI ASTEMO LTD (JP)
International Classes:
F02D45/00; F02D41/30
Foreign References:
| US5263358A | 1993-11-23 | |||
| US6481427B1 | 2002-11-19 | |||
| US5826426A | 1998-10-27 | |||
| JP2012013028A | 2012-01-19 | |||
| JP2022070442A | 2022-05-13 |
Attorney, Agent or Firm:
DELOITTE TOHMATSU IP FIRM (JP)
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