Hydraulic control system of automatic transmission
OwnerHyeog Lee, Jong Park +2inventors
InventorsHyeog Lee, Jong Park, Byung Shin, Jin Park
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Abstract
A hydraulic control system of an automatic transmission includes broadening a control region of the transmission. In the hydraulic control system, a frictional element control pressure, for controlling a frictional element, is changed from a solenoid control pressure to a line pressure corresponding to a change of an open/closed state of a corresponding port of a valve.
Claims4
A hydraulic control system for an automatic transmission, wherein a frictional element control pressure for controlling a frictional element is changed from a solenoid control pressure to a line pressure corresponding to a change of an open/closed state of a corresponding port.
A hydraulic control system for an automatic transmission, comprising:
- a frictional element controlled by a frictional control pressure;
- and
- a valve capable of outputting a solenoid pressure or a line pressure;
- wherein the frictional control pressure for controlling the frictional element is controlled by the solenoid pressure or the line pressure outputted by the valve.
A method for controlling an automatic transmission, comprising:
- controlling a valve between outputting a solenoid pressure and outputting a line pressure;
- and
- applying a control pressure to a frictional element, wherein the control pressure is either the outputted solenoid pressure or the outputted line pressure.
Dependencies are inferred from the claim text.