| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a control device for a secondary air supply device, capable of avoiding the catalyst cracking of a catalyst converter. <P>SOLUTION: The control device (a secondary air supply control part) 52 for the secondary air supply device instructs the secondary air supply device 4 which supplies secondary air to the upstream side of the catalyst converter 32 provided on an exhaust passage 3 of an internal combustion engine 1, where exhaust gas flows, to supply or stop the secondary air. It comprises a temperature difference measuring means 52b or temperature difference estimating means 52d, 52e for measuring or estimating a temperature differenceΔT between the upstream side and the downstream side of the catalyst converter 32, where the exhaust gas flows, and a secondary air supply adjusting means 52c for instructing the secondary air supply device 4 to stop the supply of the secondary air being supplied or to reduce the supply amount when the temperature differenceΔT exceeds preset threshold values Bs, Br. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
