Hyundai Motor Company

Kia Motors Corporation

Myunghwa Ind. Co., Ltd.

Amotech Co., Ltd.

Kia Motor Corporation

Yun Seok Kim

Seung Yong Lee

Yong Sun Park

Haeng Jin Ko

Gyuhwan Kim

Jong-Hoon Lee

Tae-Sung Oh

Kyung-Hwan Kim

Kwang-Ho Lee

Chung Han Oh

Young Bum Kum

Jeawoong Yi

Bong Sang Lee

Dong Hui Kim

Jun Ki Rhee

Ho Taek Lee

Min Su Park

Chi Myung Kim

Sam Ick Son

Kyoung Han Ryu

Gi Young Nam

Jong Kuk Park

Jin Young Yoon

Sae Hoon Kim

Byung Soo Kim

Yoo Chang Yang

Eun Ho Lee

Han Sang Kim

Kook Il Han

Yoonsik Woo

Hun Soo Kim

Su Dong Han

Young Woo Noh

Jea Woong Yi

Jae Woong Lee

Hyun Kyu Lim

Hark Koo Kim

Jun Ho Cha

Harkkoo Kim

Seong Kyun Kim

Soon Il Hong

Yong Suk Shin

Seung Hyeob Lee

Hyeong Geun Song

Yu Man Won

Tae Sung Oh

Haenjin Ko

Bo Hwan Cha

Jeong Gil Park

A method of controlling a lock pin of a CVVT (continuous variable valve timing) system is provided. The method includes an oil supply operation of operating a spool of a valve bolt by means of oil drawn into the CVVT system and supplying the oil to the lock pin and a switching valve. The method further includes a switching-valve opening operation of opening the switching valve by means of pressure of the oil supplied in the oil supply operation, and a lock-pin releasing operation of supplying oil to a chamber when the switching valve opens and releasing the lock-pin when there is no difference in oil pressure between an advanced chamber and a retracted chamber.

Method of controlling lock pin of continuously variable valve timing system

The present disclosure provides generally for an apparatus for opening and closing a channel. A diverter valve may open and close the channel by sliding and having a pressure reducing portion at a side to decrease a side force due to hydraulic pressure.

Apparatus for opening and closing channel

The present disclosure provides a CVVT system including: an OCV supplying oil received from a cylinder block into a CVVT; an oil supply unit supplying oil from the OCV to a lock pin; and an actuator selectively opening or closing the oil supply unit such that oil is supplied to the lock pin and the lock pin is separated from a lock pin hole when the oil supply unit is opened.

CVVT system

An intermediate phase adjustment apparatus of a CVVT includes check valves provided to prevent backflow of oil when the oil moves from one chamber to another chamber in order to secure a parking position of a lock pin in a CVVT of which an advance chamber and a retard chamber are formed between a rotor and a stator, and an oil inlet portion formed at the stator to correspond to inlet portions of the check valves, wherein an oil inlet portion provided at one chamber is formed larger than an oil inlet portion provided at the other chamber by a predetermined size, and the open angles of the check valves for making oil to flow into a chamber are increased, thereby preventing an offset occurrence by a cam torque.

Intermediate phase adjustment apparatus of CVVT

The present invention provides a lithium-air hybrid battery and a method for manufacturing the same, which has a structure in which a liquid electrolyte electrode and a solid electrolyte electrode are stacked on both sides of an ion conductive glass ceramic. That is, disclosed is a lithium-air hybrid battery and a method for manufacturing the same, which has a structure in which a lithium metal negative electrode includes a liquid electrolyte and a porous air positive electrode comprising a carbon, a catalyst, a binder and a solid electrolyte are separately stacked on both sides of an impermeable ion conductive glass ceramic, and the liquid electrolyte is present only in the lithium metal negative electrode.

Li-air hybrid battery and method for manufacturing the same

The present invention provides a fuel cell separator and a method for surface treatment of the same, in which ionized nanoparticles are attached to the surface of a separator to form fine projections such that the surface of the separator exhibits superhydrophobicity. For this purpose, the present invention provides a method for surface treatment of a fuel cell separator which provides nanoparticles for forming fine projections on the surface of the separator to a discharge electrode and ionizes the nanoparticles by an arc discharge generated in the discharge electrode. The ionized nanoparticles are then attached to the surface of the separator by an electric field generated by applying a high voltage between the separator and the discharge electrode, thereby forming fine projections for imparting superhydrophobicity.

Fuel cell separator and method for surface treatment of the same

An electric water pump, which can not only ensure more reliable waterproof and cooling performance, provides enhanced durability and operational reliability, and is able to reduce the number of parts and has a more compact structure, compared to the conventional technique.

Electric water pump

A variable compression ratio device may include a piston assembly having double pistons of which the volume may be varied, a lifter relatively moving one piston of the double pistons with respect to the other piston of the double pistons, a guide unit engaged with the piston assembly and guiding a movement of the one piston with respect to the other piston, and a locking unit selectively coupling the one piston to the other piston.

Variable compression ratio device and internal combustion engine including the same

An electric water pump apparatus may include a body having a stator chamber and a rotor chamber therein, a stator having a hollow cylindrical shape and being disposed in the stator chamber and generating a magnetic field, wherein the stator fluidly insulates the stator chamber and the rotor chamber, a rotor disposed in the rotor chamber and enclosed by the stator, wherein the rotor is rotated by the magnetic field, and a pump cover connected to the body and forming a volute chamber therein, wherein the volute chamber and the rotor chamber are fluidly-communicated through a connecting hole formed to the body and a coolant is supplied to the rotor chamber through the connection hole, wherein the stator includes a stator groove formed in an inner circumference therein and the stator groove is fluid-connected to the rotor chamber and the volute chamber through the connection hole.

The present invention provides a local hydrophilic gas diffusion layer configured to enhance the water removal performance of a fuel cell For this purpose, the present invention provides a gas diffusion layer in which a region under each of a pair of lands, which receives a clamping pressure of the fuel cell stack, is subjected to local hydrophilic treatment by a simple process, thereby enhancing the water removal performance of the fuel cell stack. In particular, the local hydrophilic gas diffusion layer has a first region under each land of the separator which receives the clamping pressure; and a second region under the gas channel of the separator, wherein the first region is subjected to hydrophilic treatment.

Local hydrophilic gas diffusion layer and fuel cell stack comprising the same

A manifold insert installed in a fuel cell having distribution guides is provided. The manifold insert is configured to form a flow field from an inlet port of fluid to an outlet port connected to a fuel cell stack. This manifold insert includes a plurality of distribution guides that divide the flow field from the inlet port to the outlet port such that the fuel cell stack is divided into a plurality of regions according to the distance from the inlet port. The distribution guides have surfaces that are at least partially curved such that the flow of the fluid from the inlet port to the outlet port is changed by the curved surfaces and form a plurality of guide flow fields such that the fluid is supplied to the divided regions of the fuel cell stack along the plurality of guide flow fields at different flow rates.

Manifold insert having distribution guides and fuel cell stack comprising the same

A method for manufacturing a stator for an electric water pump may be used for manufacturing the stator used in the electric water pump. In the electric water pump which includes stator assembly for an electric water pump, wherein the stator assembly including a plurality of core-insulator assemblies generates a magnetic field according to a control signal and a rotor is rotated by the magnetic field generated at the stator assembly to pressurize coolant, the method for manufacturing the stator assembly may include a) stacking a plurality of pieces made of a magnetic material to form a core stack, b) molding an insulator to the core stack, c) coiling a coil to the insulator to form a core-insulator assembly so as to form a magnetic path, and d) connecting the respective core-insulator assembly in an annular shape in sequence to form the stator assembly.

Method for manufacturing stator for electric water pump

Disclosed is a canned motor for restraining a cogging torque from being generated by inserting magnetic metal pins into slot openings of a stator, thereby reducing noise and vibrations during an operation of the canned motor. The canned motor includes: a can inserted into a housing to seal a coil mounted within the housing; and a stator installed on an outer peripheral surface of the can and inserted along an inner peripheral surface of the housing. A plurality of fixing guides protrude from an outer peripheral surface of the can and metal pins are inserted into the fixing guides to be integral with the fixing guide, such that the metal pins are inserted into and attached to slot openings of the stator when inserted into the stator.

Canned motor for reducing cogging torque

The present invention provides an induction heating device for a fuel cell system, which can rapidly heat coolant during cold start-up, control the power consumption depending on the voltage of a fuel cell stack, and ensure the insulation resistance by separating a heating unit, which is in contact with the coolant, from the outside. That is, the present invention provides an induction heating device for a fuel cell system, in which an insulating housing is provided in a coolant circulation line, a heater for heating coolant is provided in the housing, and a high frequency controller for controlling the power consumption of the heater is provided at the outside of the housing such that the coolant can be rapidly heated during cold start-up, precisely control the power consumption depending of the voltage of a fuel cell stack, and improve the insulation performance by separating the heater as a heating unit, which is in contact with the coolant, and the high frequency controller and a coil as a power unit with respect to the insulating housing.

Induction heating device for fuel cell system

Growing community of inventors

Yongin-si, South Korea

Yun Seok Kim