Verbrennungsmotorantriebssteuerungsvorrichtung und Verbrennungsmotorantriebssteuerungsverfahren

Details

Veröffentlichungs-Nr.

EP3447270

Aktenzeichen

EP18187719

Anmeldetag

7. August 2018

Veröffentlichung

16. Dezember 2020

Erteilung

16. Dezember 2020

Rechtsraum

EP

IPC

F02D37/02F02D41/00F02D41/14F02P5/152F02P5/145// F02D35/02F02D41/02

Abstract

A catalyst temperature is reliably maintained to be equal to or lower than a damaging temperature in accordance with an operation state of an internal combustion engine. A reference EGR rate is calculated on the basis of a speed and a load of an engine when ignition timing is not retarded (S100) . Next, a protection EGR rate that is required to maintain temperatures of exhaust system components within an allowable limit temperature range is calculated in accordance with an ignition timing retardation amount (S110) . When the protection EGR rate is higher than the reference EGR rate, within a range that an EGR rate does not exceed a stable combustion maximum allowable EGR rate calculated in consideration of a torque fluctuation allowable limit (S120), EGR control is executed by using the protection EGR rate (S130 to S170) . In this way, even when the ignition timing is retarded, an increase in an exhaust temperature is suppressed and prevented, and the temperatures of the exhaust system components are reliably maintained to be equal to or lower than the damaging temperature.

Anmelder

Firma

Bosch Corporation

Land

🇯🇵 Japan

Fachgebiete