TWO-STROKE ENGINE AND FOUR-STROKE ENGINE

• Main Authors: MURATA NAOHIRO, ISHIGURO KENJI, FUKUYAMA MASAHISA
• Format: Patent
• Language: English; Korean
• Published: 02.04.2014
• Subjects: BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; CONTROLLING COMBUSTION ENGINES; 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; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MECHANICAL ENGINEERING; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; WEAPONS

An exhaust gas exhausted from a combustion chamber (20) of a two-stroke engine (1) is fed to a turbine (51) of a supercharger (5). Part of the exhaust gas that has passed through the turbine (51) is extracted as an EGR gas by an exhaust gas recirculation part (83). The EGR gas is cooled by the heat of vaporization of liquid ammonia ejected from an ammonia ejection part (86), circulated into a suction gas in a suction path (82), pressurized by a compressor (52), and supplied as a scavenging gas into the combustion chamber (20). This recirculation of the exhaust gas can reduce the amount of nitrogen oxide exhausted from the two-stroke engine (1) into the ambient air. Ejecting the liquid ammonia toward the EGR gas in a recirculation path (84) facilitates cooling of the EGR gas, which is required for circulating the EGR gas into the suction gas.