Hydraulic pressure supply system of automatic transmission
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United States of America Patent
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Feb 27, 2018
Issued Date -
N/A
app pub date -
Jun 16, 2016
filing date -
Dec 14, 2015
priority date (Note) -
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Abstract
A hydraulic pressure supply system of an automatic transmission may include a mechanical oil pump fluidly-connected to the oil pan to supply oil to first and second discharge paths fluidly-connected to the mechanical oil pump, a first switch valve fluidly-connected to the first discharge path and selectively supplying oil to a first supply path fluidly-connected to the first switch valve, a second switch valve fluidly-connected to the first and second discharge paths and selectively supplying oil supplied in the first supply path to the transmission unit and a pressure control valve through a second supply path fluidly-connected to the second switch valve, respectively, a first solenoid valve actuator engaged to the first switch valve and a second solenoid valve actuator engaged to the second switch valve, and an electrical oil pump fluidly-connected to the oil pan to supply the oil to a third supply path fluidly-connected with the second supply path.
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