Abgasrückführungsvorrichtung und Motor

Details

Veröffentlichungs-Nr.

EP4790255

Anmeldetag

19. August 2024

Veröffentlichung

30. Mai 2025

Rechtsraum

EP

Abstract

An exhaust gas recirculation device and an engine are provided, with which the flow rate of recirculated exhaust gas can be controlled so that the concentration of NOx contained in the exhaust gas reaches a target value. An exhaust gas recirculation device 3 includes an exhaust pipe 26 that is provided in an exhaust system and guides the exhaust gas, a NOx sensor 53 that is provided in the exhaust pipe 26 and measures the NOx concentration in the interior of the exhaust pipe 26, an exhaust gas recirculation pipe 27 that is connected to the exhaust pipe 26 and guides the recirculated exhaust gas to an intake system, a flow control valve 28 that is provided in the exhaust gas recirculation pipe 27 and adjusts the flow rate of the recirculated exhaust gas flowing through the exhaust gas recirculation pipe 27, and a control device 4 that executes control for calculating a deviation between a target value of the NOx concentration and an actual measurement value of the NOx concentration, which has been measured by the NOx sensor 53, deriving a correction value on the basis of the calculated deviation, learning the derived correction value and storing the learned correction value in a storage unit as a learned value, and setting a final opening of the flow control valve 28 on the basis of the learned value stored in the storage unit and a basic opening of the flow control valve 28.

Anmelder

Firma

Kubota Corporation

Land

🇯🇵 Japan