Assembly process for hydraulic valve lifters to reduce...

Details Assembly process for hydraulic valve lifters to reduce... Assembly process for hydraulic valve lifters to reduce...

2008-01-29

2008-01-29

Chang, Ching (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Tappet

C123S090480, C123S090550

Reexamination Certificate

active

11372926

ABSTRACT:
Valve lift variation associated with a deactivation roller hydraulic valve DRVHL (DRHVL) can result in unacceptable valve overlap and idle conditions for an internal combustion engine. Two sources of length variation in a DRHVL are leakdown and residual mechanical lash. Total length variation is the sum of these two factors, and each factor has an associated tolerance. In the prior art, the two factors are independent, resulting in a total population variation that is the sum of the two independent variations. A DRHVL assembly process in accordance with the invention includes the step of associating leakdown test results for individual lash adjusters with residual lash results by adjusting the residual lash characteristics of individual DRHVL assemblies to complement the leakdown characteristics in minimizing total length variation in the population of assembled DRHVLs.

REFERENCES:
patent: 6814040 (2004-11-01), Hendriksma et al.
patent: 7089900 (2006-08-01), Masello et al.

Affiliated with

Also associated with

Rating

Assembly process for hydraulic valve lifters to reduce... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Assembly process for hydraulic valve lifters to reduce..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Assembly process for hydraulic valve lifters to reduce... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3951916