METHOD OF OPERATING AN ENGINE WITH A MIXTURE OF GASEOUS FUELAND EMULSIFIED PILOT FUEL TO REDUCE NITROGEN OXIDE EMISSIONS

• Main Authors: COLEMAN, GERALD N, WILLI, MARTIN L, CEMENSKA, RICHARD A
• Format: Patent
• Language: English; French
• Published: 26.08.1999
• Edition: 6
• 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

Reduction of nitrogen oxide emissions during operation of an engine (10) is achieved by using a fuel mixture therein which includes a gaseous fuel (36) and an emulsified pilot fuel (38). The method includes the steps of (i) advancing air into a combustion chamber (28) of the engine (10), (ii) advancing a gaseous fuel (36) into the combustion chamber (28), (iii) injecting an emulsified pilot fuel (38) into the combustion chamber (28), wherein the emulsified pilot fuel (38) includes water and liquid fuel, and (iv) compressing a mixture which includes (A) the air, (B) the gaseous fuel (36), and (C) the emulsified pilot fuel (38) within the combustion chamber (28) during a compression stroke of the engine (10), whereby heat generated by compression of the mixture causes the emulsified pilot fuel (38) to combust so as to ignite the gaseous fuel (36).