Patents by Inventor Byong Young Choi
Byong Young Choi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8726861Abstract: A variable valve lift apparatus may include a camshaft, a low lift cam which may be connected to the camshaft and rotates, a high lift cam which may be rotatably mounted to the camshaft and may be selectively connected to the camshaft to rotate with the camshaft, a high lift cam connecting portion which selectively connects the high lift cam to the camshaft, and a tappet including a low lift cam contact portion contacting the low lift cam and a high lift cam contact portion selectively activating the high lift cam.Type: GrantFiled: November 17, 2010Date of Patent: May 20, 2014Assignee: Hyundai Motor CompanyInventors: Byong Young Choi, Jin Kook Kong, Soo Hyung Woo, Young Hong Kwak, Gee Wook Shin, Jei Choon Yang, Chang Ho Yang
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Publication number: 20140109865Abstract: A pre-chamber structure for a piston engine may include: a pre-chamber combustion chamber in which a mixture of fuel and air is combusted and a pre-chamber compression chamber including a sub-chamber communicating with the pre-chamber combustion chamber and having an inclined wall surface, and a main chamber extending from the sub-chamber, thereby preventing the fuel from being adsorbed and remaining in the wall surface of the pre-chamber compression chamber in a droplet state.Type: ApplicationFiled: December 13, 2012Publication date: April 24, 2014Applicant: Hyundai Motor CompanyInventors: Wonjun LEE, Soo Hyung WOO, Jin Kook KONG, Byong Young CHOI, Gee Wook SHIN, Young Hong KWAK, Jin Soon KIM
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Publication number: 20140090616Abstract: A continuous variable valve lifter having a cylinder air volume difference adjuster includes a camshaft having an input cam, an eccentric control shaft disposed parallel to the camshaft, and a control link rotatable around the eccentric control shaft. An output cam is provided to open and close a valve actuator for opening/closing, and a connection link is rotatably connected to the control link, and driving the output cam by the rotation of the input cam. A cam cap is disposed where the camshaft and the eccentric control shaft are mounted. The cylinder air volume difference adjuster includes a hinge pin serving as the rotational center of the output cam disposed parallel to the camshaft, a pin holder where the hinge pin is mounted, and an adjusting bolt for selectively shifting the position of the pin holder.Type: ApplicationFiled: September 27, 2013Publication date: April 3, 2014Applicant: Hyundai Motor CompanyInventors: Byong Young CHOI, Jin Kook KONG, Young Hong KWAK, Soo Hyung WOO, Gee Wook SHIN
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Publication number: 20140041605Abstract: An electro-hydraulic variable valve lift apparatus may include an hydraulic pump body installed in an engine, a piston provided to reciprocate within the hydraulic pump body and forming an hydraulic pump chamber together with the hydraulic pump body, an hydraulic pump cam disposed to be in contact with the piston and enabling the piston to reciprocate according to a rotation thereof, a retainer provided to be slidable along the piston between the piston and the engine and forming a retainer chamber with the engine, a retainer spring elastically supporting the retainer, an oil control valve allowing the hydraulic pump chamber and the retainer chamber to selectively communicate with each other, a valve opening and closing unit communicating with the hydraulic pump chamber and opened or closed according to oil pressure supplied from the hydraulic pump chamber.Type: ApplicationFiled: December 11, 2012Publication date: February 13, 2014Applicant: Hyundai Motor CompanyInventors: Soo Hyung Woo, Byong Young Choi, Young Hong Kwak, Jin Kook Kong, Wonjun Lee
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Patent number: 8646422Abstract: An electro-hydraulic variable valve lift apparatus includes a housing, a driving cam, a pump piston which forms a main chamber with the housing, reciprocates within the housing according to rotation of the driving cam, and forms hydraulic pressure within the main chamber, a pump piston elastic portion disposed for elastically supporting the pump piston, an oil pressure controller communicating with the main chamber in order to control hydraulic pressure within the main chamber, a hydraulic piston slidably disposed within the housing, includes a first body having a first diameter and a second body having a second diameter larger than the first diameter, and is connected with a valve, and a piston guide disposed between the housing and the hydraulic piston for guiding the hydraulic piston.Type: GrantFiled: November 30, 2010Date of Patent: February 11, 2014Assignee: Hyundai Motor CompanyInventors: Byong Young Choi, Jin Kook Kong, Soo Hyung Woo, Jin Soon Kim
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Patent number: 8616166Abstract: An electric continuously variable valve timing apparatus may include a cam sprocket, a camshaft rotatably connected with the cam sprocket, a motor portion, a lead screw portion which may be disposed within the motor portion, may be screwed-engaged with the motor portion, and moves along length direction of the camshaft according to operations of the motor portion, and a camshaft holder rotatably connecting the lead screw portion and the cam sprocket, wherein the camshaft holder moves along length direction of the camshaft according to the movement of the lead screw portion and varies relative phase angle between the cam sprocket and the camshaft for controlling valve timing.Type: GrantFiled: November 22, 2011Date of Patent: December 31, 2013Assignee: Hyundai Motor CompanyInventors: Jei Choon Yang, Byong Young Choi, Jin Kook Kong, Soo Hyung Woo, Young Jin Won, Jin Soon Kim
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Patent number: 8607751Abstract: An electro-hydro valve lift system may include a drive cam, a pump piston, a first and a second EHV apparatus, a first oil control valve, a first oil control hydraulic line fluid-communicating the main chamber with the first oil control valve, a second oil control hydraulic line fluid-communicating the first oil control valve with the first EHV apparatus, a third oil control hydraulic line fluid-communicating the main chamber with the second EHV apparatus, a fourth oil control hydraulic line selectively fluid-communicated with the second oil control hydraulic line according to the first oil control valve, an accumulator fluid-communicated with the fourth oil control hydraulic line, and a second oil control valve disposed on the fourth oil control hydraulic line, wherein the fourth oil control hydraulic line is fluid-communicated with the third oil control hydraulic line according to the second oil control valve.Type: GrantFiled: June 20, 2012Date of Patent: December 17, 2013Assignee: Hyundai Motor CompanyInventors: Jei Choon Yang, Byong Young Choi, Young Hong Kwak, Wonjun Lee, Jin Kook Kong, Soo Hyung Woo
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Patent number: 8596234Abstract: An electro-hydraulic variable valve lift apparatus may includes a housing having a housing protruding portion is formed therewithin, a driving cam, a pump piston which forms a main chamber with the housing, reciprocates within the housing according to rotation of the driving cam, and forms hydraulic pressure within the main chamber, a pump piston elastic portion disposed for elastically supporting the pump piston, an oil pressure controller communicated with the main chamber in order to control hydraulic pressure within the main chamber, a hydraulic piston slidably disposed within the housing and connected with a valve, a multiple orifice unit slidably disposed within the hydraulic piston and forms an auxiliary chamber with the hydraulic piston, and the multiple orifice unit of which an orifice hole communicating the main chamber with the auxiliary chamber is formed thereto, and an orifice unit elastic portion disposed within the auxiliary chamber to elastically support the multiple orifice unit.Type: GrantFiled: November 30, 2010Date of Patent: December 3, 2013Assignee: Hyundai Motor CompanyInventors: Byong Young Choi, Jin Kook Kong, Soo Hyung Woo, Jin Soon Kim
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Patent number: 8573168Abstract: A hydraulic pressure valve apparatus includes a housing of which a first chamber and a second chamber are formed therein, wherein a diameter of the second chamber is bigger than that of the first chamber, a first piston disposed within the first chamber, an elastic portion disposed within the first chamber for elastically supporting the first piston and a second piston disposed within the second chamber and connected to a valve.Type: GrantFiled: December 8, 2011Date of Patent: November 5, 2013Assignee: Hyundai Motor CompanyInventors: Jei Choon Yang, Chang Ho Yang, Byong Young Choi, Young Hong Kwak, Jin Kook Kong, Soo Hyung Woo
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Patent number: 8468990Abstract: Power consumption for maintaining a target valve timing and noise in operation is reduced by a continuously variable valve timing apparatus including a camshaft holder fixed to a camshaft, a cam sprocket, a leadscrew screw-coupled with the camshaft holder and the cam sprocket and is movable so as to rotate the camshaft holder and the cam sprocket in opposite directions, and an operating unit operated by a motor and moves the leadscrew.Type: GrantFiled: August 22, 2011Date of Patent: June 25, 2013Assignee: Hyundai Motor CompanyInventors: Jei Choon Yang, Byong Young Choi, Jin Kook Kong, Soo Hyung Woo, Jin Soon Kim
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Patent number: 8468984Abstract: A variable compression ratio apparatus may include an external piston, a piston pin mounted in the external piston and a connecting rod, including an internal piston including a slot and sliding in an interior circumference of the external piston, wherein the piston pin passes through the internal piston and the external piston, a latching pin passing through the piston pin and selectively sliding therein, variable sliders disposed to selectively contact one of both ends of the latching pin, at both sides thereof to push the one of the both ends to the opposite side, and a support plate slidably supporting the variable sliders such that the variable sliders reciprocate perpendicular to length direction of the latching pin, wherein one end of a connecting arm selectively rotating may be connected to the variable slider and a sliding direction of the variable sliders may be controlled by rotation of the connecting arm.Type: GrantFiled: November 30, 2010Date of Patent: June 25, 2013Assignee: Hyundai Motor CompanyInventors: Ju Hun Lee, Dong Seok Lee, Jei Choon Yang, Eun Ho Lee, Byong Young Choi, Jin Kook Kong, Soo Hyung Woo
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Patent number: 8464677Abstract: A variable valve lift apparatus includes a high cam and a low cam fixed side by side to a camshaft, an outer body pressed by the rotation of the high cam, and has a crossbar formed at the bottom of the front end, an inner body, of which the front end protrudes further than the outer body, the lower front end is provided with a valve member, the upper rear end is hinged to a lost motion hinge shaft coaxially with the rear end of the outer body, and the lower rear end is pivotally connected to a hinge member, and a latching portion inserted into the inner body and selectively connected to the crossbar of the outer body to move the inner body dependent on movement of the front end of the outer body, wherein the lost motion hinge shaft is disposed in the same direction as a hinge point between the inner body and the hinge member with respect to the camshaft.Type: GrantFiled: July 25, 2011Date of Patent: June 18, 2013Assignee: Hyundai Motor CompanyInventors: Byong Young Choi, Young Hong Kwak, Gee-Wook Shin, Yoonsik Woo, Jin Kook Kong, Soo-Hyung Woo
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Patent number: 8464676Abstract: A variable valve timing apparatus according to the present invention may include a camshaft holder connected to a camshaft, a cam sprocket rotating the camshaft, a rotation shaft disposed to the camshaft holder having a moving screw thread formed thereon, a first and second driven bevel gears disposed to distal ends of the rotation shaft, a screw nut engaged with the moving screw thread and moving along length direction of the rotation shaft by rotation of the first driven bevel gear or the second driven bevel gear so as to change relative phase between the camshaft and the cam sprocket and a gear control portion which selectively rotates the first driven bevel gear or the second driven bevel gear.Type: GrantFiled: September 13, 2011Date of Patent: June 18, 2013Assignee: Hyundai Motor CompanyInventors: Jei Choon Yang, Byong Young Choi, Jin Kook Kong, Soo Hyung Woo, Jin Soon Kim
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Publication number: 20130146002Abstract: An electro-hydro valve lift system may include a drive cam, a pump piston, a first and a second EHV apparatus, a first oil control valve, a first oil control hydraulic line fluid-communicating the main chamber with the first oil control valve, a second oil control hydraulic line fluid-communicating the first oil control valve with the first EHV apparatus, a third oil control hydraulic line fluid-communicating the main chamber with the second EHV apparatus, a fourth oil control hydraulic line selectively fluid-communicated with the second oil control hydraulic line according to the first oil control valve, an accumulator fluid-communicated with the fourth oil control hydraulic line, and a second oil control valve disposed on the fourth oil control hydraulic line, wherein the fourth oil control hydraulic line is fluid-communicated with the third oil control hydraulic line according to the second oil control valve.Type: ApplicationFiled: June 20, 2012Publication date: June 13, 2013Applicant: Hyundai Motor CompanyInventors: Jei Choon Yang, Byong Young Choi, Young Hong Kwak, Wonjun Lee, Jin Kook Kong, Soo Hyung Woo
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Publication number: 20120298059Abstract: An electric continuously variable valve timing apparatus may include a cam sprocket, a camshaft rotatably connected with the cam sprocket, a motor portion, a lead screw portion which may be disposed within the motor portion, may be screwed-engaged with the motor portion, and moves along length direction of the camshaft according to operations of the motor portion, and a camshaft holder rotatably connecting the lead screw portion and the cam sprocket, wherein the camshaft holder moves along length direction of the camshaft according to the movement of the lead screw portion and varies relative phase angle between the cam sprocket and the camshaft for controlling valve timing.Type: ApplicationFiled: November 22, 2011Publication date: November 29, 2012Applicant: HYUNDAI MOTOR COMPANYInventors: Jei Choon YANG, Byong Young CHOI, Jin Kook KONG, Soo Hyung WOO, Young Jin WON, Jin Soon KIM
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Publication number: 20120291889Abstract: An oil control valve includes a housing having a control port and a drain port, a first seat with a first penetration hole forming a first chamber, a second seat with a second penetration hole forming a second chamber communicated with the control port, the second seat with the housing forming a third chamber communicating with the drain port, a first check valve within the first chamber selectively closing the first penetration hole, a second check valve within the third chamber selectively closing the second penetration hole, and a third penetration hole, a control portion selectively opening the first check valve and simultaneously closing the second check valve or selectively closing the first check valve and simultaneously opening the second check valve and an orifice connecting the first chamber with the second chamber.Type: ApplicationFiled: December 6, 2011Publication date: November 22, 2012Applicants: Unick Corporation, Hyundai Motor CompanyInventors: Byong Young CHOI, Young Hong KWAK, Gee Wook SHIN, Jin Kook KONG, Soo Hyung WOO, Chang-Hoon LEE
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Patent number: 8312852Abstract: The present invention relates to a variable tappet, and the variable tappet may include an inner tappet body of which a latching member connecting hole is formed thereto, a protrude portion formed to the latching member connecting hole, an outer tappet body which is disposed around the inner tappet body and slidable to the inner tappet body and a latching member which is disposed to the outer tappet body and selectively connected to the latching member connecting hole.Type: GrantFiled: July 29, 2010Date of Patent: November 20, 2012Assignee: Hyundai Motor CompanyInventors: Jei Choon Yang, Gee Wook Shin, Sang Won Kim, Jin Kook Kong, Soo Hyung Woo, Byong Young Choi, Young Hong Kwak, Jin Soon Kim
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Publication number: 20120280162Abstract: A hydraulic pressure valve apparatus includes a housing of which a first chamber and a second chamber are formed therein, wherein a diameter of the second chamber is bigger than that of the first chamber, a first piston disposed within the first chamber, an elastic portion disposed within the first chamber for elastically supporting the first piston and a second piston disposed within the second chamber and connected to a valve.Type: ApplicationFiled: December 8, 2011Publication date: November 8, 2012Applicant: HYUNDAI MOTOR COMPANYInventors: Jei Choon YANG, Chang Ho Yang, Byong Young Choi, Young Hong Kwak, Jin Kook Kong, Soo Hyung Woo
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Patent number: 8291875Abstract: A continuously variable valve lift device for a vehicle is provided, which includes a drive shaft rotating in association with a crank shaft and having a drive cam formed on an outer periphery thereof, a locker arm shaft provided apart from the drive shaft and having one end that supports a rocker arm rotating and rocking in association with the drive cam, output cams rotatably installed on the drive shaft to interlock with the other end of the rocker arm, and a variable drive part straightly moving the rocker arm shaft in a vertical direction of the rocker arm shaft to vary a valve lift. When a valve is shifted from the high-lift state to the low-lift state, a pumping loss is reduced to improve the fuel consumption ratio. Also, since an advance function is provided, an exhaust-side CVVT can be deleted to greatly reduce the manufacturing cost.Type: GrantFiled: November 24, 2009Date of Patent: October 23, 2012Assignee: Hyundai Motor CompanyInventors: Jei Choon Yang, Byong Young Choi, Young Hong Kwak, Ki Young Kwon, Jin Kook Kong, Soo Hyung Woo, Jin Soon Kim
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Patent number: 8245676Abstract: A continuously variable valve lift device of an engine may include a cam shaft having an eccentric cam formed on an outer peripheral surface of the cam shaft so that an oscillating outer-race wheel is coupled to and oscillatable along the eccentric cam, an output cam being rotably fitted to the cam shaft, a sliding shaft for varying the position of the output cam by moving straightly in a front and rear direction according to an engine operating condition, in which the sliding shaft has a deviation adjustment member which is formed to be eccentric toward an outer peripheral surface thereof, and a rocker arm rotably fitted to the deviation adjustment member and one end of which is rotably connected to the oscillating outer-race wheel and the other end of which is rotably engaged with the output cam.Type: GrantFiled: July 13, 2010Date of Patent: August 21, 2012Assignees: Hyundai Motor Company, Kia Motors CorporationInventors: Jei Choon Yang, Byong Young Choi, Young Hong Kwak, Ki Young Kwon, Jin Kook Kong, Soo Hyung Woo, Jin Soon Kim