EXHAUST GAS RELEASE DEVICE

• Main Author: PARK, JEONG KEUN
• Format: Patent
• Language: English; Korean
• Published: 12.10.2016
• Subjects: ACTUATING-FLOATS; BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COCKS; COMBUSTION ENGINES; DEVICES FOR VENTING OR AERATING; ENGINEERING ELEMENTS AND UNITS; FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOWOF GASES OR LIQUIDS; FLUID-PRESSURE ACTUATORS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; HYDRAULICS OR PNEUMATICS IN GENERAL; LIGHTING; MECHANICAL ENGINEERING; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; TAPS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THERMAL INSULATION IN GENERAL; VALVES; WEAPONS

The present invention relates to an exhaust gas discharging device. According to an embodiment, the exhaust gas discharging device comprises: a discharging manifold to collect and discharge exhaust gases generated in a combustion chamber; a turbine of a turbo charger operating a compressor, to rotate using the exhaust gases discharged; and an exhaust gas flux controlling unit which includes a unit body having a passage where the exhaust gases can pass in one direction and arranged between the discharging manifold and turbine and a flux controlling unit protruding from the side wall of the passage and capable of controlling the amount of passing through the passage according to the temperature of the exhaust gases. The exhaust gas flux controlling unit, including a shape memory alloy, can adjust the amount of exhaust gases passing through as the shape of shape memory alloy changes according to the temperature of exhaust gases. When an engine is operated under a low load or low speed RPM, the exhaust gas flux controlling unit reduces the flux of exhaust gases, thereby increasing the recirculation of the exhaust gases by an exhaust gas recirculation (EGR) device and satisfying NOx regulation conditions. When an engine is operated under a high load or high speed RPM, the exhaust gas flux controlling unit increases the flux of exhaust gases, thereby reducing an exhaust pumping loss and increasing the fuel efficiency. 예시적인 실시예에 따른 배기가스 배출 장치는 연소실에서 발생되는 배기가스를 수집하여 배출하는 배기 매니폴드, 배출되는 배기가스를 이용하여 회전하고, 컴프레서를 구동하는 터보차저의 터빈, 및 배기 매니폴드와 터빈 사이에 구비되고 일 방향을 따라 연장하여 배기가스가 통과할 수 있는 유로를 갖는 유닛 몸체 및 유로의 측벽으로부터 돌출하고 배기가스의 온도에 따라 유로의 개도량을 조절할 수 있는 유량 조절부를 갖는 배기가스 유량 조절 유닛을 포함한다. 배기가스 유량 조절 유닛은 형상 기억 합금을 포함하고 상기 배기가스의 온도에 따라 상기 형상 기억 합금의 형상이 변경되어 상기 배기가스의 유량을 조절할 수 있다. 엔진이 저속 RPM 또는 저부하 운전시 배기가스 유량 조절 유닛은 배기가스 유량을 감소시켜 EGR 장치에 의한 배기가스 재순환이 증대되고 NOx 규제 조건이 충족된다. 엔진이 고속 RPM 또는 고부하 운전일 때, 상기 배기가스 유량 조절 유닛은 상기 배기가스 유량을 증가시켜 엔진은 배기 펌핑 손실이 감소되며 연비가 향상된다.