Variable valve drive for load control of a positive ignition internal combustion engine
AssigneeIna Walzlager Schaeffler oHG
InventorFrank Himsel
Life of this patent
Estimating the term…
Loading patent…
AssigneeIna Walzlager Schaeffler oHG
InventorFrank Himsel
Estimating the term…
A fully variable valve drive (10) for throttle-free load control of an internal combustion engine is proposed. It is particularly characteristic of the invention, that a transmission component (4) is provided for a valve activation component (13) that is produced with two distinguishable parts. The one includes a lever (4a) that communicates at one end with a cam (2), and on the other hand of a catch (4b). This catch (4b) is attached at an end (5) of the lever (4a) that is away from the cam (2) in a manner that allows for pivotable movement. The catch (4b) communicates with a contact range (15) of a rotatable adjustment mechanism (9) on the one hand. On the other hand, it works on the valve activation component (13) through a swing movement. This can be influenced by assignment of the location of the rest range (15) with reference to a target (12) of the handle (4b).
Variable valve drive (1) for load control of a positive ignition internal combustion engine, that is located between a cam (2) of a cam shaft (3) and at least one intake valve (18), comprising a valve activation component (13), a transmission component (4), and an adjustment mechanism (9) that exerts an influence on a lifting function of the transmission component (4), the transmission component (4) acts between the cam (2) and the valve activation component (13), and has a first working surface (8) that is acted upon by the cam (2), and a second working surface (8, 11) that acts on the valve activation component (13), the transmission component (4) includes a lever (4a) with the first working surface (8) and at least one catch (4b) with the second working surface (11), the catch (4b) is pivotably attached on an end (5) of the lever (4a) facing the valve activation component (13) about a pivot center (6) on the lever (4a), the second working surface (11) acts on a contact surface (14) of the valve activation component (13), the catch (4b) includes a third working surface (12) that contacts a respective adjustment mechanism (9), the third working surface is located on a side opposite to the second working surface (11), the third working surface (12) engages a contact range (15) on the adjustment mechanism (9) having a rise that extends in a direction of opening of the intake valve (18), and the contact range (15) is movable in relation to the third working surface (12).
Dependencies are inferred from the claim text.