The invention relates to a
hydraulic control device for a dual-
clutch automatic transmission, and the
hydraulic control device comprises first and second
pressure control valves, and first and second
clutch cylinders, wherein the fuel inlet of the first
pressure control valve is communicated with a main
fuel line, the fuel outlet thereof is communicated with the first
clutch cylinder and the fuel return opening thereof is communicated with a
fuel tank; a first
safety valve is arranged between the first
pressure control valve and the first clutch cylinder, the fuel inlet thereof is communicated with a first
branch fuel line, and the fuel return opening thereof is communicated with the
fuel tank; the fuel inlet of the second pressure control valve is communicated with the main
fuel line, the fuel outlet thereof is communicated with the second clutch cylinder, and the fuel return opening thereof is communicated with the
fuel tank; a second
safety valve is arranged between the second pressure control valve and the second clutch cylinder, the fuel inlet thereof is communicated with a second
branch fuel line, and the fuel return opening thereof is communicated with the fuel tank. By the
hydraulic control device, the clutch still can release pressure when the pressure control valve is in trouble and the hydraulic
system can be prevented from
energy loss.