Patent ID: 7461620
Filing Date: 2008-12-09
Classification: F01L,Y10T

Abstract:
1. A variable valve actuating device of an internal combustion engine, comprising: a cam shaft driven by a crankshaft of the engine, the cam shaft having drive cams formed thereabout, each drive cam associated with and actuating a respective one of a plurality of engine valves; a control shaft having control cams formed thereabout, each control cam associated with a respective one of said plurality of engine valves, the control shaft changing angular position about its longitudinal axis in accordance with an operating condition of the engine; a plurality of valve actuating links, each valve actuating link associated with a respective one of said plurality of engine valves and having a bearing portion that bears against the control shaft so as to be swingable about the axis of the control shaft and a cam portion that is movable in a space defined between the cam shaft and a valve pressing structure of the respective engine valve to engage the valve pressing structure and induce an open/close operation of the respective engine valve when the valve actuating link is swung about the axis of the control shaft; a plurality of swing arms, each swing arm associated with a respective one of said plurality of engine valves and pivoted to the respective valve actuating link, a first end of the swing arm contacting the respective drive cam and a second end of the swing arm contacting the respective control cam; and a plurality of biasing members, each biasing member associated with a respective one of said plurality of engine valves, biasing the first end of the respective swing arm toward the respective drive cam and biasing the second end of the respective swing arm toward the respective control cam, whereby a change in the angular position of the control shaft changes the angular position of the control cams, which varies the degree of lift of said plurality of engine valves.