Variable length connecting rod and variable compression ratio internal combustion engine
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United States of America Patent
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Nov 6, 2018
Grant Date -
Aug 31, 2017
app pub date -
Feb 24, 2017
filing date -
Feb 29, 2016
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Abstract
A variable length connecting rod comprises a connecting rod body, an eccentric member, a hydraulic cylinder, a hydraulic piston, a check valve, a switching mechanism and a hydraulic mechanism. The check valve permits a flow of hydraulic oil from a primary side of the check valve to a secondary side of the check valve and prohibits the flow from the secondary side to the primary side. The switching mechanism comprises a single switching pin. The connecting rod body is formed with first to fourth oil paths. The switching pin is switched between a first position making the first oil path communicate with the fourth oil path and making the second oil path communicate with the third oil path, and a second position making the first oil path communicate with the third oil path and making the second oil path communicate with the fourth oil path.
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