Fuel feeding device
A technology of fuel supply device and fuel injection device, which is applied in the direction of fuel injection device, liquid fuel feeder, low-pressure fuel injection, etc. It can solve the problems that hinder the smooth movement of the poppet valve sliding parts, difficult pump performance, etc., and achieve the purpose of suppressing steam Generates, suppresses noise, and improves the degree of freedom
Inactive Publication Date: 2005-02-09
KEIHIN CORP
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Problems solved by technology
[0012] According to the above description, due to the compression of the steam in the plunger pump, the pump discharge is easy to vary, and it is difficult to maintain stable pump performance.
[0013] In addition, when an external force acts on any one of the plunger pump and the nozzle, the other part is deformed, so for example, when an external force acts on the plunger pump, the force will cause the nozzle to deform through the spacer of the plunger pump. The cylinder is deformed, which hinders the smooth operation of sliding parts such as poppet valves that move in the cylinder
[0014] In particular, it is not preferable for motorcycles, outboard motors, and general-purpose motors where the intake pipe is exposed outside.
Method used
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[0065] pass below figure 1 , The fuel supply device described as an embodiment of the fuel supply device of the present invention is composed of a fuel pump P, a fuel injection valve J, a main body B, and a pressure regulator R.
[0066] The fuel pump P is formed as follows.
[0067] 1 denotes a bobbin, which is composed of a tubular cylindrical portion 1A, a lower flange portion 1B, and an upper flange portion 1C. The portion 1C extends in the outer peripheral direction from the tip of the cylindrical portion 1A, and the electromagnetic coil 2 is wound around the outer periphery of the cylindrical portion 1A.
[0068] 3 denotes a fixed iron core, which is formed of a magnetic material, and its top end part is inserted into the lower part of the inner circumference of the cylindrical part 1A of the bobbin 1, and is provided on the bottom surface of the lower flange part 1B of the bobbin 1. The inner peripheral portion of the ring-shaped bottom side magnetic plate 4A (formed ...
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A fuel pump P, the electromagnetic fuel injection valve J, and a pressure regulator R are integrally fixed to a base body B. A fuel discharge path 5 of the fuel pump P, a fuel inflow path 32D of the fuel injection valve J, and a fuel inflow path 52 of the pressure regulator R are connected through a fuel passage 61 in the base body B. The base body B is mounted on an intake pipe 70, the fuel injection valve J is supported by the intake pipe 70 and the base body B, and a nozzle hole 38A is opened and arranged in the intake pipe 70. A fuel inflow path 16 of the fuel pump P is connected to a fuel tank T through a fuel inflow pipe 80. A return fuel passage 51 of the pressure regulator R is connected to the fuel tank T through a return fuel pipe 83.
Description
technical field [0001] The present invention relates to a fuel injection device, in which the pressure of the fuel stored in the fuel tank is increased by a fuel pump, and the fuel with the increased pressure is injected into the engine through a fuel injection valve, and particularly relates to a fuel pump and a fuel injection device. Fuel supply device composed of injection valve. Background technique [0002] A conventional fuel supply device is disclosed in JP-A-2001-221137. Among them, FIG. 8 of the publication discloses the following. [0003] That is, the plunger pump and the nozzle are integrally connected, and a spacer at the bottom end of the pump body constituting the plunger pump is fixedly provided by riveting, and the upper part of the nozzle cylinder is screwed onto the spacer. [0004] In addition, the nozzles include a meter-in nozzle that passes the fuel whose pressure rises in the latter part of the pressure-feeding stroke, and a meter-out nozzle that pa...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F02M37/00F02M37/08F02M37/22F02M55/00F02M55/02F02M69/00F02M69/04
CPCY02T10/123Y02T10/12
Inventor 佐藤健一堀篭胜博宫野征雄
Owner KEIHIN CORP