Hydraulic valve lash adjusters

Details Hydraulic valve lash adjusters Hydraulic valve lash adjusters

2007-11-20

2007-11-20

Chang, Ching (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Tappet

C123S090450, C123S090480

Reexamination Certificate

active

11503567

ABSTRACT:
In hydraulic valve last adjusters for the timing gear of an internal combustion engine comprising cylinder valve lift reversal or deactivation, said adjusters being loaded by cams of one or more camshafts while being made as a combination of switchable lash adjusters (22) and (non-switchable) standard lash adjusters, said adjusters further being configured as reverse-spring adjusters or free-ball adjusters, each adjuster comprising a control valve (32) whose closing body (41) is in the opening position during a base circle phase of the associated cam, according to the invention, the stroke of the closing body (41) of a switchable lash adjuster (22) is smaller in each case than the stroke of the closing body of a standard lash adjuster. This enables the idle strokes of the two different types of last adjusters to be adapted to each other.

REFERENCES:
patent: 7093575 (2006-08-01), Bauman et al.
patent: 42 01 618 A 1 (1992-01-01), None
patent: 196 30 443 A 1 (1996-07-01), None
patent: 197 10 577 A 1 (1997-03-01), None
patent: 198 44 202 A 1 (1998-09-01), None

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