Low pollution natural gas vehicle

Details Low pollution natural gas vehicle Low pollution natural gas vehicle

F - Mech Eng,Light,Heat,Weapons

02

B

123/15, 180/42

F02B 43/00 (2006.01) F17C 9/02 (2006.01)

Patent

CA 2026544

A method and apparatus for reducing emissions from an internal combustion engine used for propelling a heavy land vehicle, for example, comprising a fuel supply tank for storing liquified natural gas and a fuel circuit for cooling compressed charge air to the engine with the heat of vaporization of the fuel. Under low load conditions fuel vapor from the tank can be consumed to avoid an excessive build-up of pressure; the engine is operated with a lean fuel/air mixture without cooling of the charge air to obtain low emissions. Non-methane hydrocarbon emissions are eliminated by stripping the natural gas of essentially all of the higher hydrocarbons during the liquification process.

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