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1. (WO2014196004) CONTROLLING DEVICE FOR INTERNAL COMBUSTION ENGINES WITH TURBOCHARGERS

Pub. No.:    WO/2014/196004    International Application No.:    PCT/JP2013/065381
Publication Date: Fri Dec 12 00:59:59 CET 2014 International Filing Date: Tue Jun 04 01:59:59 CEST 2013
IPC: F02D 41/04
F02D 13/02
F02D 23/00
F02P 5/15
Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA
トヨタ自動車株式会社
SAITO, Yusuke
齋藤 佑輔
ADACHI, Noriyasu
足立 憲保
TANAKA, Satoru
田中 聡
YOSHIZAKI, Satoshi
吉嵜 聡
MORIGUCHI, Ryutaro
森口 龍太郎
MATSUMOTO, Yosuke
松本 陽介
Inventors: SAITO, Yusuke
齋藤 佑輔
ADACHI, Noriyasu
足立 憲保
TANAKA, Satoru
田中 聡
YOSHIZAKI, Satoshi
吉嵜 聡
MORIGUCHI, Ryutaro
森口 龍太郎
MATSUMOTO, Yosuke
松本 陽介
Title: CONTROLLING DEVICE FOR INTERNAL COMBUSTION ENGINES WITH TURBOCHARGERS
Abstract:
A target air volume for achieving torque demand for an internal combustion engine with a turbocharger is back-calculated from a torque demand using a virtual air-fuel ratio. The virtual air-fuel ratio is changed from a first air-fuel ratio to a second air-fuel ratio in response to conditions for switching the operation mode from operation using the first air-fuel ratio as the target air-fuel ratio to operation using the second air-fuel ratio as the target air-fuel ratio being met. In addition, after the virtual air-fuel ratio changes from the first air-fuel ratio to the second air-fuel ratio, the target air-fuel ratio is maintained at the first air-fuel ratio until the ignition timing reaches the retard limit. In addition, in response to the ignition timing reaching the retard limit, the target air-fuel ratio is switched from the first air-fuel ratio to a third air-fuel ratio. After the target air-fuel ratio switches from the first air-fuel ratio to the third air-fuel ratio, the target air-fuel ratio is switched from the third air-fuel ratio to the second air-fuel ratio in response to the difference between the target air volume and the air volume estimated from the amount of operation of a first actuator being at or below a threshold value.