| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an exhaust emission control device of a diesel engine including DOC and DPF on an exhaust passage, suppressing damage of DPF due to increase of HC concentration, flame-out of an engine and an excessive rising temperature by correcting the minimum opening of a throttle valve and a post injection amount relative to variation of an environment condition such as an atmospheric temperature and an atmospheric pressure at compulsive regeneration of DPF, and reducing oil dilution by suppressing a fuel consumption ratio at compulsive regeneration as much as possible. <P>SOLUTION: The exhaust emission control device of a diesel engine includes a throttle valve control means 60 contracting an intake throttle valve 23 to activate the DOC 5 by raising the exhaust gas temperature at the compulsive regeneration of the DPF 7, and the throttle valve control means 60 includes a throttle minimum opening correction means 75 for calculating the minimum opening value from an engine rotational speed and an engine load by a throttle valve minimum opening map 66 and performing correction relative to the environment variation of the atmospheric pressure or the intake temperature relative to the minimum opening value. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
