| 摘要 |
A hydraulic control system for a continuously variable transmission for a hybrid electric vehicle enhances operability as speed changes are made based on input torques and engine rotational speeds since pressure of a primary pulley is controlled based on engine rotational speeds; applies a wide pressure range for solenoids in normal operation by deciding a limp home mode only when a secondary control solenoid valve (SCSV) and a ratio control solenoid valve (RCSV) are under maximum pressure at the same time; reuses flux discharged under reduced pressure from a secondary regulator valve in a lubrication control valve, thus saving energy; controls the lubrication pressure actively using PWM; and generates a pilot pressure for clutch control using a single valve when the transmission control unit fails.
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