초록 ▼

A fuel supply apparatus includes a flow control valve, a housing, a movable portion, a compression coil spring and a coil constructed integrally with a fuel pump (or separately from the fuel pump). The movable portion may be made of magnetic material and attracted to the fuel downstream side against

A fuel supply apparatus includes a flow control valve, a housing, a movable portion, a compression coil spring and a coil constructed integrally with a fuel pump (or separately from the fuel pump). The movable portion may be made of magnetic material and attracted to the fuel downstream side against the spring force of the compression coil spring by an electromagnetic attracting force generated by an electric current supplied to the coil. A fuel drain opening can be created by aligning a first communication passage to release an excess part of the fuel passing through fuel passages back to the fuel tank through the drain passage in accordance with an engine operation condition.

대표청구항 ▼

[ What is claimed is:] [1.] A fuel supply apparatus for an internal combustion engine, said apparatus comprising:a fuel tank for storing fuel;a fuel supply pipe for supplying fuel into said engine;a fuel pump for pumping fuel from said fuel tank and discharging fuel in an amount which is controlled

[ What is claimed is:] [1.] A fuel supply apparatus for an internal combustion engine, said apparatus comprising:a fuel tank for storing fuel;a fuel supply pipe for supplying fuel into said engine;a fuel pump for pumping fuel from said fuel tank and discharging fuel in an amount which is controlled according to an engine requirement into said fuel supply pipe; anddrain control means disposed on a discharge side of said fuel pump for controlling the amount of fuel discharged from said fuel pump to said fuel supply pipe,wherein said drain control means drains part of the fuel discharged from said fuel pump back into said fuel tank in a low load engine operating condition and stops draining fuel back to said tank in a high load engine operating condition,wherein said drain control means is disposed between said fuel pump and said fuel supply pipe and includes a drain passage for draining fuel discharged from said fuel pump out of said fuel supply pipe and valve means for opening or closing said drain passage according to an engine load condition,said valve opening said drain passage in a light load or a middle load engine operation,said valve closing said drain passage in a full engine load condition, andsaid valve means closing said drain passage when said engine is in a stopping condition or in a starting condition.