HYDROCARBON DISCHARGE REDUCTION DEVICE OF INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To effectively reduce the discharge of hydrocarbon from an internal combustion engine. SOLUTION: A canister 33 is connected to the intake manifold 16 of the engine 10 through purge piping 34. The canister 33 temporarily stores a fuel evaporative emission generated in a fuel tank 31, and when a purge control valve 35 is opened during the operation of the engine, the adsorbed fuel in the canister 33 is discharged. A leak check module 40 is connected to the canister 33, and the suction of air is performed by a suction pump 43 when a fuel evaporative emission flow passage is checked for leakage. An ECU 50 drives the suction pump 43 during the stoppage of the engine to suck the hydrocarbon suspending near the intake port through a purge tube 34. Thus, the hydrocarbon suspending near the intake port is adsorbed onto the canister 33. COPYRIGHT: (C)2005,JPO&NCIPI