| 摘要 |
<p>PURPOSE:To enhance warming performance of a catalytic converter so as to reduce thermal deformation of an exhaust manifold by sucking liquid staying in a space of the exhaust manifold to deliver it into a tank by a water pump by means of an exhaust gas cooling and temperature keeping controller. CONSTITUTION:At a low temperature of exhaust gas, an exhaust gas cooling and temperature keeping controller 14 sucks water staying inside a space 4 of an exhaust manifold 1 by means of a water pump 7, to deliver it into a tank 9, and then, the space 4 of the exhaust manifold 1 is in an almost vacuum state. Accordingly, the exhaust gas can be introduced into a catalytic converter 12, warming performance of which can be enhanced. At a high temperature of the exhaust gas in a high speed operation or the like, water cooled by a radiator 6 is delivered into the space 4 so that a multi-branched pipe main body 2 can be cooled. Therefore, it is possible to prevent the multi-branched pipe main body 2 of the exhaust manifold 1 from being exposed to the exhaust gas of a high temperature so as to reduce thermal deformation due to the exhaust gas.</p> |
