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Fluid pump having plunger and method of monoblock casting for housing of the same

An integral casting and fluid pump technology, which is applied to fuel injection pumps, engine components, machines/engines, etc., can solve problems such as complex assembly of high-pressure pumps

Inactive Publication Date: 2007-04-04
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the assembly work of the high-pressure pump is complicated

Method used

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  • Fluid pump having plunger and method of monoblock casting for housing of the same
  • Fluid pump having plunger and method of monoblock casting for housing of the same
  • Fluid pump having plunger and method of monoblock casting for housing of the same

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Experimental program
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no. 1 example

[0042] As shown in FIG. 1, a high pressure pump 10 supplies fuel to injectors of an internal combustion engine such as a diesel engine and a gasoline engine.

[0043] The plunger 20 moves axially in a cylinder (ram cylinder) 42 of the pump housing 40 . One end of the cylinder 42 is associated with the direction of movement of the plunger 20 . The end of the cylinder 42 defines a compression chamber 100 . An oil seal 28 is formed between the head 22 and the cylinder 42 around the outer circumference of the plunger 20 . The oil seal 28 prevents oil from entering the compression chamber 100 from the inside of the engine, and it also prevents fuel from leaking from the compression chamber 100 into the engine. A head 22 is provided on the other end of the plunger 20 . The head 22 is connected to a spring seat 24 . The spring seat 24 is biased against the inner periphery of the bottom wall of the push sleeve 26 by the biasing force of the spring 30 . The outer periphery of the ...

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Abstract

A fluid pump (10) includes a plunger (20) that is movable to pressurize fluid drawn from an inlet (50) into a compression chamber (100). The plunger (20) is substantially axially movable in a cylinder (42). Fluid pressurized in the compression chamber (100) is discharged through an outlet (70). The inlet (50) and the outlet (70) define a fluid passage therebetween. A solenoid valve (80) communicates and blocks the fluid passage to control fluid discharged through the outlet (70). A solenoid valve support (48) supports the solenoid valve (80). At least one of the inlet (50), the outlet (70), and the solenoid valve support (48) is formed of a ferrous material integrally with the cylinder (42) by monoblock casting.

Description

technical field [0001] The invention relates to a fluid pump with a plunger and an integral casting method for the housing of the fluid pump. Background technique [0002] According to US 5,603,303 (JP-A-8-14140), there is disclosed a high-pressure pump comprising a cylinder movably housing a plunger to pressurize fuel in a compression chamber. [0003] Referring to the example shown in FIG. 26 , a high-pressure pump 500 includes a plunger 510 movable in a cylinder 520 and a solenoid valve (control valve) 550 supported by a solenoid valve support 560 . The high pressure pump 500 is mounted on an external element, for example on the engine cylinder head via a flange 570 . The high pressure pump 500 also includes an inlet 530 and an outlet 540 . In this structure, the cylinder 520, the inlet 530, the outlet 540, the solenoid valve support 560 and the flange 570 are all separate parts from each other and then assembled together. [0004] Referring to the example shown in FIG...

Claims

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Application Information

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IPC IPC(8): F02M59/10
CPCF02M59/102F02M59/48F02M2200/80F02M2200/8053F02M2200/8069
Inventor 井上宏史
Owner DENSO CORP
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