Title:
内燃機関の排ガス浄化装置
Document Type and Number:
Japanese Patent JP4767218
Kind Code:
B2
Abstract:
An exhaust emission control device for an internal combustion engine (3), capable of supplying a just enough amount of reducing agent to a selective reduction catalyst (7) even when a NOx purification ratio of the catalyst is changed by various causes, thereby enabling a high NOx purification ratio and very low exhaust emissions to be maintained. An ECU (2) calculates a filtered value based on a signal from an exhaust gas concentration sensor (22), calculates a moving average value of a product of the filtered value and a reference input, calculates a control input such that the moving average value becomes equal to 0, and adds a reference input to the control input to calculate a FB injection amount. The ECU calculates a FF injection amount with a predetermined feedforward control algorithm, and adds the FF injection amount to the FB injection amount, to thereby calculate a urea injection amount.
Inventors:
Yuji Yasui
Ikue Kawasumi
Ikue Kawasumi
Application Number:
JP2007153278A
Publication Date:
September 07, 2011
Filing Date:
June 08, 2007
Export Citation:
Assignee:
Honda motor industry stock company
International Classes:
F01N3/08; B01D53/94; F02D45/00
Domestic Patent References:
| JP2004251134A | ||||
| JP2006105031A |
Attorney, Agent or Firm:
Tomoo Takahashi