Patent ID: 7051687
Filing Date: 2006-05-30
Classification: F01L,F02B,F02D,Y02T

Abstract:
1. A valve operation controller for an internal combustion engine for controlling open/close operations of an exhaust valve and a first and a second intake valve arranged in one cylinder, said valve operation controller comprising: an electromagnetic valve operating mechanism for electromagnetically opening/closing said first intake valve; a cam type valve operating mechanism for opening/closing said second intake valve with an intake cam arranged on a cam shaft driven in synchronism with rotation of said internal combustion engine, said cam type valve operating mechanism capable of generating a cylinder flowage within a combustion chamber of said cylinder; operating state detecting means for detecting an operating state of said internal combustion engine; operation mode determining means for determining an operation mode for each of said electromagnetic valve operating mechanism and said cam type valve operating mechanism in accordance with the detected operating state of said internal combustion engine; and control means for controlling operations of said electromagnetic valve operating mechanism and said cam type valve operating mechanism in accordance with the determined operation mode, wherein said cam type valve operating mechanism comprises a cam profile switching mechanism for switching a cam profile of said intake cam between a minute lift cam for opening/closing said second intake valve by a minute lift amount to generate the cylinder flowage, and a normal lift cam for opening/closing said second intake valve by a lift amount larger than said minute lift amount.