EXHAUST GAS CLEANING APPARATUS FOR INTERNAL COMBUSTION ENGINE

摘要

An exhaust gas cleaning apparatus for an internal combustion engine that is mounted on a vehicle includes an exhaust passage that is connected to the internal combustion engine, a filter that collects particulate matter in exhaust gas, an NOx reducing catalyst, a dosing valve that injects urea solution into the exhaust passage, and a controller that performs a filter regeneration process in response to a request for the filter regeneration process. The filter regeneration process includes a first filter regeneration process that is performed during an idle operation of the internal combustion engine and a second filter regeneration process that is performed with the vehicle traveling. When the first filter regeneration process has been performed for a predetermined number of times without being intervened by the second filter regeneration process, the controller does not perform the first filter regeneration process even when a request for the filter regeneration process is made.

主权项

1. An exhaust gas cleaning apparatus for an internal combustion engine mounted on a vehicle, comprising:
an exhaust passage that is connected to the internal combustion engine; a filter that is provided in the exhaust passage and collects particulate matter in exhaust gas; an NOx reducing catalyst provided downstream of the filter in the exhaust passage; a dosing valve that is provided downstream of the filter and upstream of the NOx reducing catalyst in the exhaust passage and injects urea solution into the exhaust passage; and a controller that performs a filter regeneration process in which the filter is heated to remove the particulate matter collected in the filter, in response to a request for the filter regeneration process, wherein the filter regeneration process includes a first filter regeneration process that is performed during an idle operation of the internal combustion engine and a second filter regeneration process that is performed with the vehicle traveling, and when the first filter regeneration process has been performed for a predetermined number of times without being intervened by the second filter regeneration process, the controller does not perform the first filter regeneration process even when a request for the filter regeneration process is made.