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A New Generation of LPG and CNG Engines for Heavy-Duty Applications
Technical Paper
964121
Sector:
Event:
International Seminar on Application of Powertrain and Fuel Technologies to Meet Emissions Standards
Language:
English
Abstract
Urban areas show clearly the pollution problems we are facing today. Traffic is a significant player in creating and more importantly, solving this issue. Legislators are supporting technical solutions, meeting extremely severe emission limits compared to the near future emission, and noise legislation on heavy-duty trucks. Within the technical solutions to meet these demands, a heavy-duty LPG or CNG SI engine is a practical and realistic way to go, for the next 15 years. Although creating technical challenges on thermal load and some compromising on fuel consumption, the stoichiometric concept plus 3-way catalytic converter was adopted. Extremely low emission levels can e reached. To avoid the shortcomings of the conventional LPG/CNG systems on reliability, serviceability and driveability, new multipoint injection systems have been developed. Development, hardware and test results of the engine introduced in 1994 and the engine to be introduced at the end of 1996 will be discussed.