JP2014051896A5 - - Google Patents

Claims (9)

A particulate filter for collecting particulate matter contained in the exhaust gas is arranged in the engine exhaust passage, and the particulate filter is arranged in an exhaust gas inflow passage and exhaust gas alternately arranged through porous partition walls. In an exhaust gas purification apparatus for an internal combustion engine, comprising an outflow passage,
A movement promoting means for performing movement promotion control for promoting the ash deposited on the inner peripheral surface of the exhaust gas inflow passage to move to the back of the exhaust gas inflow passage;
Detection means for detecting pressure loss of the particulate filter;
PM removal means for performing PM removal control for removing particulate matter from the particulate filter when the detected pressure loss is larger than a predetermined upper limit;
Equipped with,
The movement promoting means determines whether or not the amount of ash accumulated on the inner peripheral surface of the exhaust gas inflow passage is larger than a predetermined upper limit amount, and the ash amount is larger than a predetermined upper limit amount. When it is determined that there are many, movement promotion control is performed.
An exhaust purification device for an internal combustion engine. The exhaust purification device for an internal combustion engine according to claim 1, wherein the movement promoting means supplies liquid to the particulate filter in order to perform movement promotion control . The exhaust emission control device for an internal combustion engine according to claim 2, wherein the liquid is composed of at least one of water, an aqueous solution, and liquid fuel . Condensation for storing condensed water generated in the internal combustion engine in at least one of the engine intake passage, the engine exhaust passage upstream of the particulate filter, and the exhaust gas recirculation passage connecting the engine intake passage and the engine exhaust passage to each other The internal combustion engine according to claim 2 or 3, wherein a water storage part is formed, and the movement promoting means supplies the condensed water stored in the condensed water storage part to the particulate filter in order to perform movement promotion control . Exhaust purification device. A NOx reduction catalyst disposed in the engine exhaust passage in the particulate filter or downstream of the particulate filter, a reducing agent addition valve for secondary addition of liquid reducing agent in the engine exhaust passage upstream of the particulate filter, and NOx NOx reduction means for adding a liquid reducing agent from the reducing agent addition valve with a NOx reduction addition pressure and a NOx reduction addition time for reduction, and the movement promoting means for performing movement promotion control The liquid reducing agent is added from the reducing agent addition valve with an addition pressure lower than the NOx reduction addition pressure or an addition time longer than the NOx reduction addition time. An exhaust purification device for an internal combustion engine. The exhaust purification device for an internal combustion engine according to any one of claims 1 to 5, wherein the movement promoting means generates pulsation in the pressure in the particulate filter in order to perform movement promotion control . The exhaust purification device for an internal combustion engine according to any one of claims 1 to 6, wherein the movement promoting means vibrates the particulate filter in order to perform movement promotion control . The exhaust purification device for an internal combustion engine according to any one of claims 1 to 7, wherein the movement promoting means raises the temperature of the particulate filter to a temperature higher than that during PM removal control in order to perform movement promotion control. . The exhaust purification device for an internal combustion engine according to any one of claims 1 to 8, wherein the movement promoting means supplies the liquid to the particulate filter and coagulates the liquid in order to perform movement promotion control .