Internal combustion engine system

摘要

An internal combustion engine system basically has an internal combustion engine, a reforming fuel injection device and a reformer. The internal combustion engine has an exhaust circulation path that is connected to an exhaust path and an intake path communicating with a combustion chamber. The reforming fuel injection device injects a reforming fuel into an exhaust gas flowing through the exhaust circulation path. The reformer has a reforming catalyst for generating a hydrogen-containing gas using the reforming fuel. The internal combustion engine system has a reforming catalyst regeneration device for causing an oxygen-containing gas to flow through the exhaust circulation path and thereby regenerate the reforming catalyst at a predetermined timing for regenerating the reforming catalyst.

主权项

1. An internal combustion engine system comprising
an internal combustion engine in which an exhaust circulation path is connected to an exhaust path and an intake path communicating with a combustion chamber; a reforming fuel injection device configured to inject a reforming fuel into an exhaust gas flowing through the exhaust circulation path; a reformer provided with a reforming catalyst configured to generate a hydrogen-containing gas using the reforming fuel; and a controller including a regeneration timing determination section that is programmed to determine whether or not reforming of the exhaust gas has been discontinued, and a reforming catalyst regeneration section that is programmed to direct an oxygen-containing gas through the exhaust circulation path to regenerate the reforming catalyst upon the regeneration timing determination section determining that the reforming of the exhaust gas has been discontinued, the regeneration timing determination section determining that the reforming of the exhaust gas has been discontinued by determining whether or not reforming of the exhaust gas flowing through the exhaust circulation path is to be started, and upon determining that reforming of the exhaust gas flowing through the exhaust circulation path is to be started, the reforming catalyst regeneration section performs regeneration of the reforming catalyst during an EGR reforming start time before injection of the reforming fuel.