Hyundai Motor Company

Kia Motors Corporation

Hyundai Autron Company Ltd.

Kangnam University Industry-academia Cooperation Foundation

Haengjin Ko

Sae Hoon Kim

Young Bum Kum

Kwi Seong Jeong

Hyun-Seok Park

Uck-Soo Kim

Seungyong Lee

Young-Hyun Lee

Harkkoo Kim

Yongsun Park

Chimyung Kim

Yunseok Kim

A failure diagnosis apparatus that includes an alternating current (AC) absorption unit that is connected to the fuel cell stack and switched based on an applied AC signal to enable a current from the fuel cell stack to flow. In addition, an AC signal generator is configured to generate the AC signal and supply the generated AC signal to the AC absorption unit. As the current from the fuel cell stack is absorbed by the AC absorption unit based on an alternating signal, a stack current input into a diagnosis processing unit includes an AC component, thus the diagnosis processing unit may diagnose fuel cell stack failure by analyzing a frequency of the AC component.

Apparatus for diagnosing fault of fuel cell stack

Disclosed is a motor driven fluid pump (e.g., water pump) including a pump body having a motor chamber and a pump chamber; a bearing supporting a rotary shaft of a motor which extends from motor chamber to pump chamber in pump body; a mechanical seal disposed between rotary shaft of the motor and pump body and blocking motor chamber from pump chamber; a bearing guide integrally fixed to rotary shaft of the motor between bearing and mechanical seal; a fluidproof plate fixed to pump body to overlap bearing guide, perpendicular to rotary shaft of the motor; and a leachate exhaust aperture and a vapor exhaust aperture which are formed through pump body to communicate with the space between fluidproof plate and mechanical seal.

Motor driven fluid pump

Growing community of inventors

Seoul, South Korea

Haengjin Ko