Variable compression ratio device
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United States of America Patent
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Jun 12, 2018
Issued Date -
Jun 15, 2017
app pub date -
Aug 10, 2016
filing date -
Dec 11, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
A variable compression ratio device mounted to an engine, the engine rotating a crankshaft using a combustion force of a gas mixture and a piston, the variable compression ratio device changing a compression ratio of the mixture and including a connecting rod including a small end rotatably connected to the piston and a big end portion formed with a circular hole to be eccentrically rotatably connected to the crankshaft, a crank pin provided in the crankshaft, an eccentric cam provided to be concentrically rotatable in the hole of the big end portion and having a crank pin mounting hole eccentrically inserted with the crank pin to be rotatably connected, and a cam rotation unit provided inside the eccentric cam and rotating the eccentric cam in a clockwise or counterclockwise direction in a hole of the big end portion by a selectively supplied hydraulic pressure.
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