Machine element or mechanism – Control lever and linkage systems – Elements
Patent
1987-02-13
1988-01-26
Smith, Gary L.
Machine element or mechanism
Control lever and linkage systems
Elements
74 32, 74 8317, 74109, 74834, 123 3016, G05G 104, F01L 134, F16H 3508
Patent
active
047210079
ABSTRACT:
A variable ratio rocker arm is provided for use in combination with the valve stem and push rod of an internal combustion engine. The rocker arm has an elongated slot defined between a rod seat and a toothed rack. A fulcrum rod is provided with a toothed sector and a curved sector, with the toothed sector being engaged with the toothed rack portion of the rocker arm. A roller bearing assembly is movably disposed between the rod curved sector and the rod seat, with the roller bearing assembly being rollable along the rod seat. An actuator arm is coupled to the fulcrum rod for simultaneously rotating and translating the fulcrum rod through the rocker arm slot. The operating arm causes the fulcrum rod to rotate and translate along the mating toothing from one point of pivotal engagement, corresponding to a first engine operating condition, to another point of pivotal engagement, corresponding to a second engine operating condition.
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Luong Vinh
Smith Gary L.
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