| 摘要 |
The present invention relates to push rods for an internal combustion engine and more particulary to a hydraulic push rod. A new and useful hydraulic push rod of which varies valve timing automatically, improves low end horsepower by altering valve opening and closing degrees, or points of opening in relationship to the crankshaft. While engine rpms increase, valve duration and overlap also increase automatically for a large flow of fuel at higher engine rpms. This novel device also improves fuel economy and smog pollutant emissions.
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