Patent ID: 6886532
Filing Date: 2005-05-03
Classification: F01L,F02B,F02D,F02M,Y02T

Abstract:
1. An intake system of an internal combustion engine, comprising: a collector fixedly connected directly to at least one of a side wall of a cylinder head and a collector mounting bracket hermetically covering perimeters of intake-port opening end portions of a plurality of intake ports opening through the side wall; a plurality of intake-manifold branches respectively communicating with the plurality of intake ports and protruded into an interior space of the collector; a variable valve actuation system that continuously variably adjusts a valve lift characteristic of an intake valve, the variable valve actuation system comprising a first variable valve actuation mechanism capable of continuously variably adjusting the working angle and the lift of the intake valve; a control unit configured to be electronically connected to the variable valve actuation system for variably controlling an intake-air quantity through the variable valve actuation system; wherein the first variable valve actuation mechanism comprises: wherein the working angle and the lift of the intake valve are simultaneously adjusted by varying a center of rotation of the control cam of the control shaft.