| 摘要 |
PROBLEM TO BE SOLVED: To provide a control system of an exhaust emission control device including an oxidation catalyst, a SCR catalyst arranged downstream of the oxidation catalyst, a first electric heater for heating the oxidation catalyst, and a second electric heater for heating the SCR catalyst, for enhancing the NOeliminating performance of the SCR catalyst while reducing the power consumption of the first electric heater and the second electric heater.SOLUTION: A control system of an exhaust emission control device: specifies a combination minimizing the total of an amount of power to be distributed to a first electric heater and an amount of power to be distributed to a second electric heater among combinations each of a temperature of an SCR catalyst at the time when an NOpurification rate is equal to a target NOpurification rate and a rate of NO/NO, in correlation among a rate of NO/NO of exhaust gas flowing into the SCR catalyst, a temperature of the SCR catalyst and an NOpurification rate of the SCR catalyst; and controls the first electric heater and the second electric heater according to the specified combination. |
