Mando Corporation

In Wook Jeon

Seong Ho Choi

Kiwon Kang

Disclosed herein is a check valve. The check valve includes a valve housing having upper and lower ends opened and having an inlet formed along the circumference of the valve housing, the inlet linked to a inlet fluid path, an upper cap coupled to seal up an open upper portion of the valve housing, a lower holder coupled to an open lower portion of the valve housing, having an outlet formed along the circumference of the lower holder, the outlet linked to a outlet fluid path, and having a guide hole in the lower portion of the lower holder, and a plunger installed to move up or down to selectively open or close an orifice while elastically supported by an elastic member supported by the lower holder, wherein the plunger comprises guides at upper and lower ends of the plunger to guide the plunger to make stable linear motion.

Check valve

A check valve is disclosed. The check valve, which is installed in a modulator block of a brake system having a flow path forming a hydraulic circuit, may include: a sleeve housing whose both ends open, the sleeve housing having a discharge flow path, wherein at least one outlet is formed in the discharge flow path; a pair of adaptors respectively coupled with both open ends of the sleeve housing, wherein in one end of each adaptor, an inlet connected to a flow path of the modulator block is formed, and in the other end of the adaptor, a valve seat connected to the discharge flow path is formed; an elastic member disposed in the discharge flow path; and a pair of opening and closing members respectively supported on both ends of the elastic member, and disposed to selectively contact each valve seat of the pair of adaptors.

An electronic brake system is disclosed. The electronic brake system includes: a hydraulic pressure supply apparatus having a piston operated by an electrical signal corresponding to a displacement of a brake pedal and first and second pressure chambers provided at one side of the piston to be connected to one or more wheel cylinders so as to generate a hydraulic pressure; a first hydraulic passage communicating with the first pressure chamber; second and third hydraulic passages branched from the first hydraulic passage; a fourth hydraulic passage communicating with the second pressure chamber; a fifth hydraulic passage branched from the fourth hydraulic passage to join with the second hydraulic passage; a sixth hydraulic passage branched from the fourth hydraulic passage to join with the third hydraulic passage; a first control valve provided on the second hydraulic passage to control the flow of oil; a second control valve provided on the third hydraulic passage to control the flow of oil; a third control valve provided on the fifth hydraulic passage to control the flow of oil; a fourth control valve provided on the sixth hydraulic passage to control the flow of oil; a first hydraulic circuit configured such that the second hydraulic passage or the fifth hydraulic passage is connected to two wheel cylinders, respectively; and a second hydraulic circuit configured such that the third hydraulic passage or the sixth hydraulic passage is connected to two wheel cylinders, respectively, wherein the first control valve to the fourth control valve are provided as check valves.

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Seoul, South Korea

In Wook Jeon