Patents by Inventor Hyeungwoo Lee
Hyeungwoo Lee 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: 9512789Abstract: A supercharging engine supplying compressed air to a combustion chamber as intake air may include at least two cylinders, a deactivation cylinder being at least one of the cylinders, and selectively deactivated, a compressed air tank adapted to store compressed air supplied from a combustion chamber of the deactivation cylinder, a compressed air storage passage formed to communicate the compressed air tank with the combustion chamber of the deactivation cylinder, an intake manifold selectively communicating with the compressed air tank, and a compressed air valve selectively opening/closing the compressed air storage passage, in which compressed air may be transmitted from the combustion chamber of the deactivation cylinder to the compressed air tank as the compressed air valve is opened in a compression stroke during deactivation of the deactivation cylinder.Type: GrantFiled: November 18, 2014Date of Patent: December 6, 2016Assignee: Hyundai Motor CompanyInventors: Jangsu Lee, Jongman Jun, Hyeungwoo Lee, Hyosang Cho, Seungeun Yu, Hyounghyoun Kim
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Patent number: 9447738Abstract: A method for controlling a variable valve lift apparatus includes: measuring an operation mode switching condition; determining whether the variable valve lift apparatus is in a normal operation condition; controlling the operation of the variable valve lift apparatus depending on a predetermined normal valve lift switching map; determining whether the variable valve lift apparatus is in a mode switching delay or switching disable condition from a high lift mode to a low lift mode or whether the variable valve lift apparatus is in the mode switching delay or switching disable condition from the low lift mode to the high lift mode; controlling the operation of the variable valve lift apparatus depending on a predetermined low oil temperature valve lift switching map; and controlling the operation of the variable valve lift apparatus depending on a predetermined high oil temperature valve lift switching map.Type: GrantFiled: December 30, 2013Date of Patent: September 20, 2016Assignee: Hyundai Motor CompanyInventors: Jang Su Lee, Jun Yu, Keun Sang Kim, Hyeungwoo Lee
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Patent number: 9255551Abstract: A fouling free clean EGR system for a diesel-gasoline dual fuel powered engine allows re-circulation of an exhaust gas of a certain cylinder among a plurality of cylinders. The fouling free clean exhaust gas recirculation (EGR) system for a diesel-gasoline dual fuel powered engine in which gasoline and air are pre-mixed and supplied to cylinders and then a diesel fuel is injected and combusted together comprises a directly-exhaust cylinder of which an exhaust valve of the cylinder is connected to an exhaust manifold directly connected to a after treatment device; and an EGR cylinder of which an exhaust valve of the cylinder is connected to an EGR line and which supplies the EGR gas to the diesel-gasoline dual fuel powered engine.Type: GrantFiled: December 13, 2012Date of Patent: February 9, 2016Assignee: Hyundai Motor CompanyInventors: Dae Choi, Minyoung Ki, Seungil Park, Hyeungwoo Lee, Yohan Chi
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Patent number: 9121336Abstract: A diesel engine piston having a combustion chamber may include a profile surface that protrudes toward a center axis of the combustion chamber from an inner wall thereof and includes a protrusion on the inner wall, the protrusion extending from the inner wall with a predetermined length, wherein the protrusion divides a spray fuel, which may be sprayed and atomized onto the protrusion, into a fuel flow at an upper portion of the combustion chamber and a fuel flow at a lower portion of the combustion chamber, respectively.Type: GrantFiled: November 4, 2011Date of Patent: September 1, 2015Assignee: HYUNDAI MOTOR COMPANYInventors: Myungjun Lee, Dae Choi, Hyunsung Jung, Minyoung Ki, Hyeungwoo Lee
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Publication number: 20150167565Abstract: A supercharging engine supplying compressed air to a combustion chamber as intake air may include at least two cylinders, a deactivation cylinder being at least one of the cylinders, and selectively deactivated, a compressed air tank adapted to store compressed air supplied from a combustion chamber of the deactivation cylinder, a compressed air storage passage formed to communicate the compressed air tank with the combustion chamber of the deactivation cylinder, an intake manifold selectively communicating with the compressed air tank, and a compressed air valve selectively opening/closing the compressed air storage passage, in which compressed air may be transmitted from the combustion chamber of the deactivation cylinder to the compressed air tank as the compressed air valve is opened in a compression stroke during deactivation of the deactivation cylinder.Type: ApplicationFiled: November 18, 2014Publication date: June 18, 2015Applicant: Hyundai Motor CompanyInventors: Jangsu LEE, Jongman Jun, Hyeungwoo Lee, Hyosang Cho, Seungeun Yu, Hyounghyoun Kim
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Publication number: 20150114375Abstract: A method for controlling a variable valve lift apparatus includes: measuring an operation mode switching condition; determining whether the variable valve lift apparatus is in a normal operation condition; controlling the operation of the variable valve lift apparatus depending on a predetermined normal valve lift switching map; determining whether the variable valve lift apparatus is in a mode switching delay or switching disable condition from a high lift mode to a low lift mode or whether the variable valve lift apparatus is in the mode switching delay or switching disable condition from the low lift mode to the high lift mode; controlling the operation of the variable valve lift apparatus depending on a predetermined low oil temperature valve lift switching map; and controlling the operation of the variable valve lift apparatus depending on a predetermined high oil temperature valve lift switching map.Type: ApplicationFiled: December 30, 2013Publication date: April 30, 2015Applicant: Hyundai Motor CompanyInventors: Jang Su LEE, Jun YU, Keun Sang KIM, Hyeungwoo LEE
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Patent number: 8977474Abstract: A diesel-gasoline dual fuel powered combustion engine system is provided with spark-assisted fouling free EGR system in which gasoline and air are homogeneously combined and supplied to cylinders and then a diesel fuel is injected and combusted together. The system may include: a plurality of cylinders each having a fuel injector; and an exhaust line through which flows an exhaust gas discharged as a fuel from each cylinder is combusted; wherein gasoline fuel combustion type is adapted to one or more cylinder of the plurality of the cylinders, and diesel-gasoline fuel pre-mixed combustion type is adapted to the other cylinders.Type: GrantFiled: December 13, 2012Date of Patent: March 10, 2015Assignee: Hyundai Motor CompanyInventors: Dae Choi, Hyunsung Jung, Minyoung Ki, Hyeungwoo Lee
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Publication number: 20130112780Abstract: A multi-sac injection includes a main sac located at the center of a nozzle such that an injected fuel formed a low load cone angle to inject a fuel for pre-mixed combustion, and sub-sacs located at sides of the nozzle such that the injected fuel forms a middle/high load cone angle large relative to a low load cone angle to inject a fuel for diffusive combustion. Accordingly, smoke and NOx are significantly reduced in a low load region while maintaining features of a middle/high load region with a single injector.Type: ApplicationFiled: August 13, 2012Publication date: May 9, 2013Applicant: Hyundai Motor CompanyInventors: Hyunsung Jung, Dae Choi, Hyeungwoo Lee
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Publication number: 20130087123Abstract: A diesel-gasoline hybrid engine is constructed with an exhaust gas recirculation (EGR) system, without a design change. As a combustion space of a combustion chamber is stratified into a high-concentration EGR space and a relatively low-concentration EGR space, an ignition quality of a low-speed and low-load region is secured to improve combustion, and simultaneously, knocking in a high-low region is suppressed. Furthermore, the amount of NOX generated during gasoline premixed combustion and smoke generated during diesel combustion are significantly reduced.Type: ApplicationFiled: November 30, 2011Publication date: April 11, 2013Applicant: HYUNDAI MOTOR COMPANYInventors: Minyoung Ki, Dae Choi, Hyunsung Jung, Hyeungwoo Lee
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Publication number: 20130019838Abstract: A diesel engine piston having a combustion chamber may include a profile surface that protrudes toward a center axis of the combustion chamber from an inner wall thereof and includes a protrusion on the inner wall, the protrusion extending from the inner wall with a predetermined length, wherein the protrusion divides a spray fuel, which may be sprayed and atomized onto the protrusion, into a fuel flow at an upper portion of the combustion chamber and a fuel flow at a lower portion of the combustion chamber, respectively.Type: ApplicationFiled: November 4, 2011Publication date: January 24, 2013Applicant: Hyundai Motor CompanyInventors: Myungjun Lee, Dae Choi, Hyunsung Jung, Minyoung Ki, Hyeungwoo Lee