| 摘要 |
The invention relates to mechanical, variable lift value controllers via which, in the case of individual valves or valve groups, the actuation of the valves can be continuously adjusted from a maximum stoke length to being constantly closed during the operation of the primer mover, whereby the opening duration of the valves is simultaneously shortened during a decreasing stroke. The valves are driven by valve levers, bucket tappets, pressing rods, or rods. Said rods desmodromically transfer pressing forces and tractive forces and are actuated by valve levers, angle levers or pressing rods. The lift valve controllers have a simple mechanical system that saves both space and mass. According to FIG. 1, the valve levers (2) have a pivot joint (5) via which the valve levers (2) are driven by an angle lever (7). The angle lever (7) is driven by a cam (9) via a cam roller (8). The valve lever engages, with its contact surfaces (10 and 11), in the roller (12) of an adjusting lever (13). The angle lever can also be designed so that it engages in the contact surface of an adjusting lever by means of a roller.
|
