| 摘要 |
Apparatus for modifying engine valve lift to produce an engine valve event in an internal combustion engine comprises actuation means (100) for operating at least one exhaust valve (300a or 300), and control means (50) for moving the actuation means (100) between its inoperative position (0) and operative position (1). In the inoperative position (0), the actuation means (100) is disengaged from the at least one exhaust valve (300a or 300), and in the operative position (1), the actuation means (100) holds open the at least one exhaust valve (300a or 300) to produce the modified engine valve lift for the engine valve event, which includes an engine braking event (10). The actuation means (100) includes a motion limiting means for controlling movement of the actuation means (100) between the inoperative position (0) and the operative position (1), which occurs after the at least one exhaust valve (300a or 300) is actuated by the normal exhaust valve lifter (200). The actuation means (100) also includes a lash adjusting system for setting a lash (132) between the actuation means (100) and the at least one exhaust valve (300a or 300). The actuation means (100) further includes mechanical linkage means for transmitting load generated by the engine valve event to a housing (125). The mechanical linkage means include at least one system selected from the group consisting of: a rotatable device, a slidable device, a ball-locking device, and a toggle device. The actuation means (100) can be integrated into a valve bridge (400) and other valve train components, such as a rocker arm, wherein a plunger (136) is slidably disposed between the inoperative position (0) and the operative position (1). The control means (50) comprises at least one means selected from the group consisting of: hydraulic means, mechanical means, electric means, magnetic means, and a combination thereof.
|
