초록 ▼

An antidissipation apparatus for evaporated fuel vapor for an internal combustion engine. A purge passage connects the intake manifold and the fuel tank. A canister is installed in the purge passage and adsorbs evaporated fuel vapor generated in the fuel tank. A purge pump is installed in the purge

An antidissipation apparatus for evaporated fuel vapor for an internal combustion engine. A purge passage connects the intake manifold and the fuel tank. A canister is installed in the purge passage and adsorbs evaporated fuel vapor generated in the fuel tank. A purge pump is installed in the purge passage and delivers the adsorbed evaporated fuel vapor to the intake manifold. Since the purge pump is driven by at least a part of a fuel flow in the fuel passage, the purge pump can change its discharge amount of the adsorbed evaporated fuel vapor to the intake manifold according to an amount of the fuel flow in the fuel passage. Therefore, the evaporated fuel vapor which is adsorbed at the canister can be supplied (purged) to the intake manifold by the purge pump forcibly even if the engine is a lean-burn type which can not employ large negative pressure of the intake manifold.

대표청구항 ▼

[ What is claimed is:] [1.] An antidissipation apparatus for evaporated fuel vapor for an internal combustion engine having an intake manifold, a fuel passage and a fuel tank comprising:a purge passage which connects said intake manifold and said fuel tank;a canister installed in said purge passage

[ What is claimed is:] [1.] An antidissipation apparatus for evaporated fuel vapor for an internal combustion engine having an intake manifold, a fuel passage and a fuel tank comprising:a purge passage which connects said intake manifold and said fuel tank;a canister installed in said purge passage that adsorbs evaporated fuel vapor generated in said fuel tank; anda purge pump installed in said purge passage that delivers said adsorbed evaporated fuel vapor to said intake manifold, said purge pump being driven by at least a part of a fuel flow in said fuel passage so that said purge pump changes its discharge amount of said adsorbed evaporated fuel vapor to said intake manifold according to an amount of said fuel flow in said fuel passage.