Abstract

Different natural gas engine technologies can be applied for commercial vehicles and those investigated in the HDGAS project are:"br" - Positive ignition natural gas engine with direct injection"br" - Dual fuel natural gas engine (premixed gas and pilot diesel injection)"br" - High pressure gas injection with pilot diesel injection"br" This paper will describe the challenges and solutions of the different engine concepts in combination with LNG tank systems in respect of"br" - Greenhouse gas reduction potential including measures to improve gas engine efficiency"br" - Emission compliance to EU VI