Internal combustion engine which may be selectively operated by the two-stroke method or the four-stroke method and method for operating such an internal combustion engine
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United States of America Patent
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Aug 15, 2017
Grant Date -
Mar 13, 2014
app pub date -
Jul 2, 2013
filing date -
Sep 7, 2012
priority date (Note) -
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Abstract
Systems and methods are provided for operating an internal combustion engine in a two-stroke mode or a four-stroke mode to achieve greater fuel efficiency and minimize emissions. The system comprises a mode-adaptable valve; a valve rocker arm to actuate opening and closing of the mode adaptable valve; a cam follower of a first cam for carrying out a two-stroke mode; a cam follower of a second cam for carrying out a four-stroke mode; and a pin to mechanically couple the valve rocker arm to the cam follower of the first cam or the cam follower of the second cam. Coupling the valve rocker arm to the cam follower of the first cam enables a two-stroke mode and coupling the valve rocker arm to the cam follower of the second cam enables a four-stroke mode.
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