Variable valve lift system
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United States of America Patent
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Oct 17, 2017
Issued Date -
N/A
app pub date -
Sep 24, 2015
filing date -
Nov 14, 2014
priority date (Note) -
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Abstract
A variable valve lift system may include a roller finger follower having an end connected with a valve and a roller mounted thereto. A hydraulic lash adjuster supports another end of the roller finger follower and has operating modes which are changed to a high lift mode or a low lift mode according to supplied hydraulic pressure to change a height of the hydraulic lash adjuster. A hydraulic pressure supplying portion supplies the hydraulic pressure to the hydraulic lash adjuster. A cam is mounted to a camshaft and contacts the roller of the roller finger follower. The cam has a first ramp and a second ramp formed thereon.
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