摘要:
An injection valve has a nozzle body, a valve needle positioned in the nozzle body, an actuator for actuating the valve needle, and an orifice plate fixed at an end of the nozzle body. The orifice plate has a valve seat for cooperating with the valve needle and an orifice for injecting a fluid. The orifice plate is provided with a projection having a convex-curved surface on an orifice outlet side of the orifice plate. A flat surface portion is formed in the area of the convex-curved surface, and the outlet of the orifice is located in the flat surface portion.
摘要:
An injection valve has a nozzle body, a valve needle positioned in the nozzle body, an actuator for actuating the valve needle, and an orifice plate fixed at an end of the nozzle body. The orifice plate has a valve seat for cooperate with the valve needle and an orifice for injecting a fluid. The orifice plate is provided with a projection having a convex-curved surface on an orifice outlet side of the orifice plate. A flat surface portion is formed in the area of the convex-curved surface, and the outlet of the orifice is located in the flat surface portion.
摘要:
A fuel injection valve comprises a convex portion prominently formed on an outer end surface of a nozzle body, stepped recesses each of which has plural steps formed by press forming on the convex portion, and multi orifices as fuel nozzle holes formed by press forming so that an outlet of each of the orifices is located at a bottom face of each of the stepped recesses. Furthermore, the fuel injection valve has plural sets each of which comprises one of the stepped recesses and the relevant orifice, the orifices incline to each other, and a step on a downstream side in each of the stepped recesses has a larger diameter than a step on an upstream side thereof.
摘要:
A fuel injection valve comprises a convex portion prominently formed on an outer end surface of a nozzle body, stepped recesses each of which has plural steps formed by press forming on the convex portion, and multi orifices as fuel nozzle holes formed by press forming so that an outlet of each of the orifices is located at a bottom face of each of the stepped recesses. Furthermore, the fuel injection valve has plural sets each of which comprises one of the stepped recesses and the relevant orifice, the orifices incline to each other, and a step on a downstream side in each of the stepped recesses has a larger diameter than a step on an upstream side thereof.
摘要:
It is an object of the present invention to enhance the orifice design freedom and easy machine ability in a fuel injection valve in which orifices are formed by press-working.In a machining method for forming an orifice in a fuel injection valve by operating a punch 43 in an axial direction inclined relative to a normal direction perpendicular to a tangent plane of a curved surface portion 30 or relative to a perpendicular direction perpendicular to a slant surface of a slant surface portion, the machining method comprises a first step of operating the punch 43 along an axis 57j pre-shifted in parallel from an orifice axis 57i and pressing an orifice plate 15′ to form a recess 577a, a second step, after the first step, of shifting an axis of the punch 43 to the position of the orifice axis 57i and forming a recess in a bottom 577as of the recess 577a formed in the first step, the recess formed in the second step being deeper than the recess 577, and a third step of forming an orifice in a bottom of the orifice formed in the second step.
摘要:
It is an object of the present invention to enhance the orifice design freedom and easy machin ability in a fuel injection valve in which orifices are formed by press-working.In a machining method for forming an orifice in a fuel injection valve by operating a punch 43 in an axial direction inclined relative to a normal direction perpendicular to a tangent plane of a curved surface portion 30 or relative to a perpendicular direction perpendicular to a slant surface of a slant surface portion, the machining method comprises a first step of operating the punch 43 along an axis 57j pre-shifted in parallel from an orifice axis 57i and pressing an orifice plate 15′ to forma recess 577a, a second step, after the first step, of shifting an axis of the punch 43 to the position of the orifice axis 57i and forming a recess in a bottom 577as of the recess 577a formed in the first step, the recess formed in the second step being deeper than the recess 577, and a third step of forming an orifice in a bottom of the orifice formed in the second step.
摘要:
To manufacture a cylindrical member, such as the nozzle body of a fuel injector, in which a fluid passage is formed at high productivity and to improve the reliability.A cylindrical member, such as the nozzle body of a fuel injector, in which a fluid passage is formed is manufactured by drawing martenstic stainless steel. In addition, during the drawing process of martenstic stainless steel, an intermediate product is annealed and lug is removed after another drawing process, and then is subjected to drawing again to obtain a product.
摘要:
A fuel swirler positioned upstream of an injection orifice is disposed at the tip of a nozzle body in a fuel injector, in which the fixed core and the nozzle body are coupled to each other via a non-magnetic cylindrical seal ring press-fitted and welded to the outer circumference of one end on the nozzle body side of the fixed core and the inner circumference of one end of the nozzle body. The inner circumference of the fuel swirler and the inner circumference of the seal ring function serve as a guide for slidably guiding a stroke movement of the needle. The fuel swirler is held between the receiving surface of the nozzle body and the orifice plate, thus defining an annular fuel passage between the outer circumference of the fuel swirler and the inner circumference of the nozzle body, so that fuel flows into a passage groove formed at the lower end surface of the fuel swirler via the annular fuel passage. A mass movable in an axial direction independently of the needle is interposed between the return spring and the needle, and a plate spring is interposed between the mass and the needle.
摘要:
An electromagnetic fuel injection valve comprising: a metallic cylindrical-shaped vessel provided at a tip end thereof with a fuel injection port, the other end thereof being closed by a stationary core provided centrally thereof with a through-hole; a movable member arranged between the stationary core and the fuel injection port and provided at a tip end thereof with a valve element, which opens and closes the fuel injection port, a maximum outside diameter of the movable member being smaller than a minimum inside diameter of the through-hole; and an electromagnetic drive mechanism that reciprocates the movable member.
摘要:
A projection type display apparatus includes a color separation optical system separating light emitted from a light source into first, second and third color light; reflection type light valves provided each in correspondence to one of the first through third color light; polarization beam splitters provided each in correspondence to one of the first through third color light, which executes polarization separation causing the first through third color light to enter the reflection type light valves, and analyzing light exiting from the reflection type light valves after being modulated; a color composition optical system having a first, a second and a third prism, wherein the analyzed first through third color light undergo color composition; and a projection lens projecting the resulting light from the color composition, and lengths of optical paths wherein each of the first through third color light travels are equal to one another.