초록 ▼

An evaporative fuel controller for an internal combustion engine to prevent blow-off of fuel and/or outflow of emissions immediately after fuel is fed into a fuel tank, and to prevent a large quantity of evaporative fuel from flowing into a canister during engine operation. The controller includes a

An evaporative fuel controller for an internal combustion engine to prevent blow-off of fuel and/or outflow of emissions immediately after fuel is fed into a fuel tank, and to prevent a large quantity of evaporative fuel from flowing into a canister during engine operation. The controller includes a filler tube having a filler passage therein; a check valve for closing the filler passage immediately after the supply of fuel to the fuel tank; a refueling vapor control valve disposed on the fuel tank and communicating with the evaporation passage; a tank-side communication passage for communicating the refueling vapor control valve with the filler passage upstream of the check valve; a first communication passage for communicating the tank-side communication passage and the canister with one another; a first two-way check valve positioned in the first communication passage; a fuel cut valve located on the fuel tank; a second communication passage for communicating the fuel cut valve and the canister with one another; a second two-way check valve disposed in the second communication passage; a third communication passage bypassing the second two-way check valve and communicating with the second communication passage; and a two-way solenoid valve provided in the third communication passage.

대표청구항 ▼

[ What is claimed is:] [1.] In an evaporative fuel controller for an internal combustion engine, having a canister disposed between an evaporation passage communicated to the inside of a fuel tank and a purge passage communicated to an intake system of the engine, and a purge valve provided along sa

[ What is claimed is:] [1.] In an evaporative fuel controller for an internal combustion engine, having a canister disposed between an evaporation passage communicated to the inside of a fuel tank and a purge passage communicated to an intake system of the engine, and a purge valve provided along said purge passage for controlling an amount of evaporative fuel to said intake system in accordance with an operating state of said engine, the improvement comprising: a filler tube having a filler passage formed therein for pouring fuel into said fuel tank; a check valve disposed in said filler tube for closing said filler passage immediately after the supply of fuel to said fuel tank; a refueling vapor control valve disposed on said fuel tank, said control valve communicating with said evaporation passage; a tank-side communication passage for communicating said refueling vapor control valve with said filler passage on the upstream side of said check valve; a first communication passage for communicating said tank-side communication passage and said canister with one another; a first two-way check valve positioned in said first communication passage; a fuel cut valve located on said fuel tank; a second communication passage for communicating said fuel cut valve and said canister with one another; a second two-way check valve disposed in said second communication passage; a third communication passage bypassing said second two-way check valve and communicating with said second communication passage; and a two-way solenoid valve provided in said third communication passage.