Patent ID: 6877466
Filing Date: 2005-04-12
Classification: F01L,F02B

Abstract:
1. A variable valve operating system for an internal combustion engine with at least two cylinder banks comprising: a variable valve-lift and working-angle control mechanism that changes at least one of a valve lift and a working angle of each of engine valves arranged in each of the cylinder banks; at least two variable valve timing control mechanisms provided for each of the cylinder banks, for changing a valve timing of each of the engine valves arranged in one bank of the cylinder banks and a valve timing of each of the engine valves arranged in the other bank independently of each other; and a control unit configured to be electronically connected to the variable valve-lift and working-angle control mechanism and the variable valve timing control mechanisms for responding a failure in one of the variable valve timing control mechanisms for failsafe purposes; the control unit comprising: