Fuel injection method of internal combustion engine and fuel injection apparatus of internal combustion engine

In a fuel injection method of an internal combustion engine comprising an intake valve device for opening and closing an intake port, a fuel injector arranged in an upstream side of said intake valve device and driven by a control signal from an engine control device apparatus, an intake air flow control device for controlling an intake air flow, and a fuel injection by said fuel injector is synchronized to an intake stroke of the internal combustion engine, wherein

• forming a fuel spray injected from said fuel injector to a central portion spray having a lean concentrated region and an outer side portion spray;
• forming said outer portion spray to a rich spray portion having a richly concentrated region and having a wide spread angle and a medium spray portion having a medium concentrated region and having a narrow spread angle in a peripheral portion thereof;
• generating an integrated flatness spray body;
• and
• arranging said rich spray portion having said richly concentrated region and having said wide spread angle of said fuel injector to orient an intake air flow which is fluidization-controlled according to said intake air flow control device;
• and
• transporting said spray to said intake port according to said intake air flow.

In a fuel injection method of an internal combustion engine comprising an intake valve device for opening and closing an intake port, a fuel injector arranged in an upstream side of said intake valve device and driven by a control signal from an engine control device apparatus, and an intake air flow control device for controlling an intake air flow, a fuel injection by said fuel injector is synchronized to an intake stroke of the internal combustion engine, wherein

• generating a fuel spray injected from said fuel injector to a flatness spray body having a fuel spray portion having a wide spread angle and a fuel spray portion having a narrow spread angle;
• heightening an atomization degree of an intake air flow to have 30-50 μm;
• controlling a velocity of said intake air flow to have 15-30 m/s;
• and
• transporting said spray to said intake valve device by riding said intake air flow.

In a fuel injector of an internal combustion engine, said fuel injector is driven according to a control signal from an engine control device, wherein

• the fuel injector comprising
• a cylindrical form nozzle portion in which a space is formed on an interior portion thereof and in a bottom portion thereof a fuel injection hole is formed,
• a seat face continued to said fuel injection hole and formed said bottom portion of said nozzle portion,
• a valve body arranged in said space of said nozzle portion, by said valve body a gap with said seat face is adjusted and controlled,
• a fuel swirl portion formed said space and arranged in a surrounding portion of said valve body, wherein
• in the fuel injector, said bottom portion of said nozzle portion has a first surface in which an outer surface portion in an outlet side of a fuel injection hole including said outlet side of said fuel injection hole and a wall which is separated from said fuel injection hole and opposed to a fuel spray to be subject to the injection, and a second surface which is projected from said first surface.

In a fuel injector of an internal combustion engine, said fuel injector is driven according to a control signal from an engine control device, wherein

• the fuel injector comprising
• a cylindrical form nozzle portion in which a space is formed an interior portion thereof and in a bottom portion thereof a fuel injection hole is formed,
• a seat face continued to said fuel injection hole and formed on said bottom portion of said nozzle portion,
• a valve body arranged in said space of said nozzle portion, by said valve body a gap with said seat face is adjusted and controlled,
• a fuel swirl portion formed said space and arranged in a surrounding portion of said valve body, wherein
• in said bottom portion of said nozzle portion, an outer surface portion of an outlet side of said fuel injection hole is formed with a L shape and in a part of said surface another face separated from said fuel injection hole and for opposing to a fuel spray to be subjected to the injection is formed.

In a fuel injection method of an internal combustion engine in which a fuel is injected in an upstream of an intake port in which air is taken to a combustion chamber of the internal combustion engine, wherein

• providing an intake air control device provided in an intake air passage for communicating to said intake port;
• generating a flow velocity distribution in a lateral cross-section of said intake air passage to the air for flowing into said intake air passage;
• concentrating a fuel in a region formed on said lateral cross-section of said intake air passage;
• heightening a flow velocity of said region of said lateral cross-section of said intake air passage by said intake air flow control device;
• riding the fuel which has injected to said region on an intake air flow in which the flow velocity has heightened;
• and
• transporting the fuel into said combustion chamber.

In a fuel injection apparatus of an internal combustion engine in which a fuel is injected in an upstream of an intake port in which air is taken to a combustion chamber of the internal combustion engine, wherein

• the fuel injection apparatus comprising:
• an intake air flow control device provided in an intake air flow passage for communicating said intake port and generating a flow velocity of a fuel spray in a lateral cross-section of said intake air passage to air which flows said intake air passage;
• a fuel injector for injecting the fuel to concentrate the fuel in a region in which a flow velocity of said fuel spray is heightened in the lateral cross-section of said intake air passage;
• thereby using said fuel injector the fuel which has injected to said region is transported to ride on the intake air flow in which the flow velocity of said fuel spray is heightened.