Abstract: A method of controlling an exhaust gas recirculation (EGR) system for preventing a valve from sticking may include performing, by an ECU, an EGR Cooler By-Pass Valve (ECB V/V) normal mode for operating an ECB V/V under a low temperature and low load condition to prevent fouling of an EGR cooler and overcooling of an EGR gas, when an EGR is controlled with a vehicle driven, and performing, by the ECU, an ECB V/V self-cleaning mode for operating an ECB V/V in consideration of an engine condition when the OFF-state of the ECB V/V is determined and an ECB V/V sticking detection mode for detecting sticking of the ECB V/V in continuous performing, cold performing, and in-driving performing in consideration of an opening amount of the ECB V/V when a fixed state of the ECB V/V is determined.

Abstract: A method of controlling an exhaust gas recirculation (EGR) system for preventing a valve from sticking may include performing, by an ECU, an EGR Cooler By-Pass Valve (ECB V/V) normal mode for operating an ECB V/V under a low temperature and low load condition to prevent fouling of an EGR cooler and overcooling of an EGR gas, when an EGR is controlled with a vehicle driven, and performing, by the ECU, an ECB V/V self-cleaning mode for operating an ECB V/V in consideration of an engine condition when the OFF-state of the ECB V/V is determined and an ECB V/V sticking detection mode for detecting sticking of the ECB V/V in continuous performing, cold performing, and in-driving performing in consideration of an opening amount of the ECB V/V when a fixed state of the ECB V/V is determined.

Abstract: A common rail system for a dimethyl ether (DME) fuel in which a medium-pressure fuel system is disposed between a low-pressure fuel system and a high-pressure fuel system to improve the durability and reliability of the common rail system is provided. The low-pressure fuel system stores a DME fuel in a gaseous state. The medium-pressure fuel system maintains a DME fuel supplied from the low-pressure fuel system to a high-pressure fuel system or returned from the high-pressure fuel system to the low-pressure fuel system in a liquid state. The high-pressure fuel system receives the DME fuel maintained in the liquid state from the medium-pressure fuel system and supplies the DME fuel to an injector.

Abstract: Disclosed are a new Mercury-free flat light source structure capable of enhancing and adjusting brightness, maintaining stable and uniform discharge, and improving luminous efficiency, and a large flat light source apparatus using the same Mercury-free flat light source structure as a unit cell capable of adjusting the brightness and causing local discharges in selected areas, and a driving method thereof.

Abstract: A flat light source structure includes an upper substrate made of a light transmitting material; a lower substrate separated from the upper substrate by a distance; a barrier rib for maintaining the distance, thereby defining a discharge space filled with a discharge gas; a phosphor coated on at least one of the inner surfaces of the upper substrate and the lower substrate, respectively; a pair of main electrodes disposed at predetermined positions on the surface of the upper or lower substrate and applied with a predetermined driving voltage, frequency and duty ratio to excite the phosphor by plasma generated; an auxiliary electrode formed at a predetermined position on the lower and/or upper substrate(s) to have a parallel component which is parallel with any one of the main electrodes when viewing the discharge space from the upper substrate and a perpendicular component which traverses across the pair of main electrodes.

Abstract: Disclosed are a new Mercury-free flat light source structure capable of enhancing and adjusting brightness, maintaining stable and uniform discharge, and improving luminous efficiency, and a large flat light source apparatus using the same Mercury-free flat light source structure as a unit cell capable of adjusting the brightness and causing local discharges in selected areas, and a driving method thereof.

Abstract: Disclosed are a new Mercury-free flat light source structure capable of enhancing and adjusting brightness, maintaining stable and uniform discharge, and improving luminous efficiency, and a large flat light source apparatus using the same Mercury-free flat light source structure as a unit cell capable of adjusting the brightness and causing local discharges in selected areas, and a driving method thereof.