Patent ID: 6637193
Filing Date: 2003-10-28
Classification: B01D,F01N,F02D,F02M,Y02T

Abstract:
An exhaust emission control device comprising:an engine using natural gas as fuel gas, a fuel tank for storing said fuel gas, a suction air passage for supplying said fuel gas from said fuel tank to said engine, an exhaust passage for discharging exhaust gas from said engine, a fuel supply port connected to said suction air passage, for supplying said fuel gas to said fuel tank an adsorbent disposed at an intermediate portion of said suction air passage, for adsorbing non-methane hydrocarbon in said fuel gas, an adsorbent heating means for heating said adsorbent, an exhaust emission control catalyst disposed in said exhaust passage, a catalyst temperature measuring means for measuring a temperature of a catalyst, and a control means for controlling activation of said adsorbent heating means based on an activation temperature of said catalyst as obtained by said catalyst temperature measuring means.