Engine exhaust particulate after-treatment system

摘要

An exhaust particulate trapping means 12 for trapping particulates in exhaust gases is provided in an exhaust path 3 of an engine. When the engine enters a deceleration condition during the removal by burning of exhaust particulates trapped by the exhaust particulate trapping means 12, the drop of the flow rate of exhaust gases flowing into the exhaust particulate trapping means 12 is restricted. Thus, the cooling action of the exhaust particulate trapping means 12 through heat exchange with the exhaust gases can be kept up to suppress that the temperature of the exhaust particulate trapping means 12 excessively rises on engine deceleration.