Fuel injection device of an internal combustion engine

A fuel injection device of an internal combustion engine having an intake passage, said device comprising:

• a fuel reservoir;
• a fuel pump connected to said fuel reservoir;
• a fuel chamber having a fuel nozzle which opens into said intake passage;
• a fuel feed passage connecting said fuel pump to said fuel chamber;
• flow control means arranged in said fuel feed passage for controlling the flow of a fuel to feed the fuel into said fuel chamber in an amount which is directly proportional to the amount of sucked air flowing within said intake passage;
• first valve means having a constant pressure chamber arranged in said intake passage between said fuel pump and said flow control means for feeding the fuel at a constant pressure into said flow control means;
• detecting means for detecting an operating condition of the engine to produce a control signal when the engine is accelerated and before the completion of warm-up of the engine;
• a fuel bypass passage directly connecting said constant pressure chamber to said fuel chamber, and;
• normally closed second valve means arranged in said fuel bypass passage for opening said fuel bypass passage in response to said control signal when the engine is accelerated and before the completion of warm-up of the engine.