Patent ID: 9562453
Date: 2017-02-07
CPC Classifications: F01N,F02D,F02M

Claim:
1. A control system of an internal combustion engine comprising: a reducing agent feed valve arranged in an engine exhaust passage; an NO a booster pump that boosts an injection pressure of a reducing agent injected from the reducing agent feed valve; and an electronic control unit operatively connected to the reducing agent feed valve and the booster pump, wherein the electronic control unit is configured to control the reducing agent feed valve to perform: a NO a clogging prevention injection of injection of the reducing agent from the reducing agent feed valve which is made smaller in amount of injection compared with the NO wherein the electronic control unit is configured to control the booster pump to perform a boosting action of the injection pressure by the booster pump, wherein the electronic control unit is configured to control the reducing agent feed valve and the booster pump such that the boosting action of the injection pressure by the booster pump and the NO