| 摘要 |
<P>PROBLEM TO BE SOLVED: To reliably prevent particulate matter from being deposited in an exhaust gas purification device 50 during regeneration, and secure the minimum travel function in a working machine, when abrupt combustion occurs in an exhaust gas purification device 50. <P>SOLUTION: The exhaust gas purification system includes the exhaust gas purification device 50 arranged in an exhaust passage 77 of an engine 70. When the exhaust gas temperature TP in the exhaust gas purification device 50 becomes an abnormal temperature TPex or higher, a limp home mode is executed for limiting a rotating speed N of the engine 70, upper limit threshold values Nmx and Tmx of torque T and a driving time of the engine 70. <P>COPYRIGHT: (C)2012,JPO&INPIT |
