| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To effectively increase torque by appropriately utilizing an exhaust blow down effect when a request for increasing the torque is issued, in an internal combustion engine provided with a variable valve train capable of changing a valve overlap period and a variable nozzle type turbo supercharger, about a control device of the internal combustion engine. <P>SOLUTION: In the case that the request for increasing the torque is issued, firstly, a variable nozzle 22c is controlled to be fully closed without providing the valve overlap period. Then, in the case of determining that the torque is risen to close to a maximum torque curve (near a triangle mark) which can be output while the valve overlap period is not provided, a variable nozzle aperture is gradually opened to an aperture for an optimum turbo efficiency and the valve overlap period is gradually extended to obtain the exhaust blow down effect. In this case, post injection is executed to additionally provide a turbine 22a with exhaust energy. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
