Device and method for operating a valve drive of an internal combustion engine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 10, 1998
Grant Date -
N/A
app pub date -
Oct 1, 1996
filing date -
Feb 9, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A switchable supporting component (30) is to be designed in such a way that a pull-rod engaging at one end (35) of it can be fully operatively separated from the control cam. The invention effects this in that in the housing (31) there runs at least one further radial drilling (37) aligned in a large cam movement phase in which there is a coupling component (49) movable along the drilling which, when the cam is disconnected from the pull-rod, can move in such a way that it laps over an annular gap (41) formed between the housing (31) and the cylinder head (10) and runs at the same time in the two drillings (37) in the housing (31) and the cylinder head (10). Thus, the idle stroke of the housing (31) necessary when the pull-rod is disconnected is avoided. Disconnection can take place even at medium to fast rotation speeds, since a pressure spring (47) no longer keeps the pull-rod in permanent contact with the cam via the housing (31) in the disconnection phase.
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