Fluid sprinkling – spraying – and diffusing – Unitary injection nozzle and pump or accumulator plunger
Reexamination Certificate
2001-10-23
2004-03-09
Kwon, John (Department: 3747)
Fluid sprinkling, spraying, and diffusing
Unitary injection nozzle and pump or accumulator plunger
C239S533300, C123S295000
Reexamination Certificate
active
06702194
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a technique for supplying directly the fuel into a combustion chamber of an internal combustion engine and particularly to a fuel injection method of a direct injection type internal combustion engine, a fuel injector of a direct injection type internal combustion engine, a direct injection type internal combustion engine, and a combustion method of a direct injection type internal combustion engine.
To improve of a fuel consumption, a stratification lean burn is an important combustion method. To realize the stratification lean burn, it is necessary to gather a rich air-fuel mixture at a vicinity of an ignition plug and a technique relating the about technique shown in, for example, is Japanese application patent laid-open publication No. Hei 6-81651 and Japanese application patent laid-open publication No. Hei 6-81656 has known.
In a technique shown in the above stated Japanese application patent laid-open publication No. Hei 6-81651, a tumble is formed in a cylinder and an injected fuel is collided with a piston and the fuel is guided according to a wall of a cavity and is supported according to the tumble and then the fuel is supplied to an ignition plug.
Further, to form an atomization of the fuel spray it is effective to employ a tumble system fuel injector and the fuel spray during this case is become a hollow conical shape.
FIG. 3
shows a prior art to which the above stated technique according to the prior art is combined.
Further, in a technique shown in the above stated Japanese application patent laid-open publication No. Hei 6-81656, a tumble is formed in a cylinder and from a first injection port of a fuel injector the fuel is injected in a direction of an ignition plug and from a second injection port of the fuel injector the fuel is injected in a direction which is along to a flow of the tumble (through an immediately below portion of an air intake valve and aiming to a vicinity immediately below portion of an air exhaust valve and to a slight squint direction against to a horizontal direction of the cylinder), namely the fuel is injected to two directions.
In the above stated conventional fuel injection techniques, it is not taken the consideration about a fuel adhesion to the piston, the wall face of the cylinder or the ignition plug, since the fuel adhesion to the piston is caused, it is not preferable to reduce a discharge HC (a non-combustible hydrocarbon (HC)) according to an incomplete combustion of the adhesion fuel.
SUMMARY OF THE INVENTION
The present invention is devised from the above stated problems and to solve these problems.
An object of the present invention is to provide a fuel injection method of a direct injection type internal combustion engine, a fuel injector of a direct injection type internal combustion engine, a direct injection type internal combustion engine, and a combustion method of a direct injection type internal combustion engine wherein a fuel adhesion amount to the piston can be reduced.
Another object of the present invention is to provide a fuel injection method of a direct injection type internal combustion engine, a fuel injector of a direct injection type internal combustion engine, a direct injection type internal combustion engine, and a combustion method of a direct injection type internal combustion engine wherein a discharge HC can be reduced.
A further object of the present invention is to provide a fuel injection method of a direct injection type internal combustion engine, a fuel injector of a direct injection type internal combustion engine, a direct injection type internal combustion engine, and a combustion method of a direct injection type internal combustion engine wherein a fuel consumption can be improved.
A further more object of the present invention is to provide a fuel injection method of a direct injection type internal combustion engine, a fuel injector of a direct injection type internal combustion engine, a direct injection type internal combustion engine, and a combustion method of a direct injection type internal combustion engine wherein a combustion stability performance can be improved.
A further more object of the present invention is to provide a fuel injection method of a direct injection type internal combustion engine, a fuel injector of a direct injection type internal combustion engine, a direct injection type internal combustion engine, and a combustion method of a direct injection type internal combustion engine wherein a formation of a stratification at the high rotation area can be attained.
To attain the above stated objects, according to the present invention, a fuel injection method of a direct injection type internal combustion engine comprises of the steps of changing a volume of a combustion chamber according to a piston, generating a tumble flow of air in said combustion chamber, dividing a fuel spray into a fuel spray having a strong penetration force and a fuel spray having a small penetration force, and injecting directly the fuel in said combustion chamber to direct said fuel spray having said strong penetration force in a direction of an ignition plug and to direct said fuel spray having said small penetration force in a direction of said piston.
To attain the above stated objects, according to the present invention, a direct injection type fuel injector comprises a fuel passage having a fuel injection port at an end portion, a valve seat provided in a midway of said fuel passage, a valve body for opening and closing said fuel passage by incorporating with said valve seat, a tumble element for giving a tumble force to fuel which passes through between said valve body and said valve seat, and a fuel spray division means having a splitter which is provided on said fuel injection port at a position which is eccentrically from a center of said fuel injection port.
To attain the above stated objects, according to the present invention, a direct injection type fuel injector comprises a fuel passage having a fuel injection port at an end portion, a valve seat provided in a midway of said fuel passage, a valve body for opening and closing said fuel passage by incorporating with said valve seat, a tumble element for giving a tumble force to fuel which passes through between said valve body and said valve seat, a fuel spray division means having a splitter which is provided on said fuel injection port, a portion for opposing said fuel injector port of said splitter is formed with a mountain shape having unequal sides.
To attain the above stated objects, according to the present invention, a direct injection type fuel injector comprises a fuel passage having a fuel injection port at an end portion, a valve seat provided in a midway of said fuel passage, a valve body for opening and closing said fuel passage by incorporating with said valve seat, a fuel enlargement means provided on said fuel injection port and having a hole having a diameter larger than a diameter of said fuel injection port, a fuel guidance means provided on a downstream of said fuel enlargement means and having a slit like hole, a fuel spray means provided at a downstream of said fuel guidance means and having a first slit like hole provided at a rectangular direction against to said slit like hole of said fuel guidance means and a second slit like hole in parallel to said first slit like hole and having a width larger than a width of said first slit like hole.
To attain the above stated objects, according to the present invention, a direct injection type internal combustion engine comprises a combustion chamber for inhaling air through an air intake valve, a piston for varying a volume of said combustion chamber, a tumble flow generation means for generating a tumble flow of the air in said combustion chamber, and a fuel injector being a direct injection type fuel injector for supplying directly a fuel into said combustion chamber and for injecting the fuel by dividing into a first fuel spray having a strong penetration force and a second fuel spray
Kihara Yusuke
Nakayama Yoko
Nogi Toshiharu
Ohsuga Minoru
Shiraishi Takuya
Crowell & Moring LLP
Hitachi , Ltd.
Kwon John
LandOfFree
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