| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an internal combustion engine and the control method of the internal combustion engine which performs EGR (exhaust gas recirculation) with the optimal EGR gas quantity by comprehensively considering the NO<SB POS="POST">X</SB>cleaning rate of catalyst and the NO<SB POS="POST">X</SB>suppression effect by virtue of the EGR with a simple logic and at a low cost in an NO<SB POS="POST">X</SB>cleaning system including both of a post-treatment system and the EGR system using the catalyst in the internal combustion engine. <P>SOLUTION: The internal combustion engine includes: an exhaust gas cleaning device which is arranged on an exhaust channel and uses the catalyst; and a control device which controls the EGR, wherein, immediately after starting the internal combustion engine and when a catalyst temperature Tc is in a first temperature range of the preset first temperature T1 or lower, the target EGR gas quantity is reduced and, when the catalyst temperature is in a second temperature range of the preset second temperature higher than the first temperature T1, or lower, the target EGR gas quantity is maintained and, when the catalyst temperature Tc is in a third temperature range higher than the second temperature T2, the target EGR gas quantity is increased. <P>COPYRIGHT: (C)2013,JPO&INPIT |
