| 摘要 |
A cooling system for an internal combustion engine wherein an exhaust purification catalyst is arranged in the exhaust passage of the internal combustion engine, said cooling system being equipped with: a cooling unit that cools the exhaust passage upstream from the exhaust purification catalyst; a heat transfer inhibition unit configured so as to inhibit the transfer of heat, from the exhaust passage downstream from the location cooled by the cooling unit, to the cooling unit; and a heat radiation suppression unit that is provided in a curved section in the exhaust passage running from the location where the heat transfer inhibition unit is provided to the exhaust purification catalyst, and that suppresses the radiation of heat transferred from the exhaust flowing in the curved section to the atmosphere around the curved section via the curved section passage walls forming the curved section. By means of this configuration a reduction in the exhaust temperature can be prevented. |
