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Fuel supply pump and tappet structure body

A fuel supply pump and structure technology, applied in fuel injection pumps, fuel injection devices, pumps, etc., can solve the problems of reduced durability and easy damage to the pump casing, and achieve the effects of improved durability, simple structure, and damage prevention

Inactive Publication Date: 2007-01-31
BOSCH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the inner peripheral surface of the pump casing is easily damaged and the durability is reduced.

Method used

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  • Fuel supply pump and tappet structure body
  • Fuel supply pump and tappet structure body
  • Fuel supply pump and tappet structure body

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0060] Such as figure 1 As shown, the first embodiment is a fuel supply pump 50 having a lifter structure 6 including a roller 29 and a lifter body portion 27 for accommodating the roller 29, the fuel supply pump It is characterized in that it has a plate-shaped or wire-shaped restricting unit 90 for rotatably holding the roller 29 in the roller seat 28 of the tappet body 27 and restricting the movement of the roller 29 in the direction of the rotation axis.

[0061] Hereinafter, the aforementioned fuel supply pump 50 will be specifically described in terms of constituent elements and the like.

[0062] 1. Basic method of fuel supply pump

[0063] Although there is no particular limitation on the basic form of the fuel supply pump, it is preferable that, for example, figure 1 and figure 2 The fuel supply pump 50 is shown. That is, the fuel supply pump 50 is preferably composed of, for example, a pump housing 52 , a plunger barrel (pump barrel) 53 , a plunger 54 , a leaf...

no. 2 approach

[0117] Such as Figure 7 (a)~(b), Figure 8 (a)~(b) and Figure 9 As shown in (a) to (b), the second embodiment is a lifter structure 6, the lifter structure includes a roller 29 and a lifter body part 27 for accommodating the roller 29, the lifter structure It is characterized in that it has a plate-shaped or wire-shaped restricting unit 90 for rotating and holding the roller 29 on the roller seat 28 of the tappet body part 27, and restricting the movement of the roller 29 in the direction of the rotation axis.

[0118] Hereinafter, the basic structure of the lifter structure 6 , the divided lifter body portion 27 and the roller 29 , and the restricting unit 90 will be specifically described with reference to the corresponding drawings.

[0119] 1. Basic structure

[0120] Such as Figure 7 (a)~(b), Figure 8 (a)~(b) and Figure 9 As shown in (a) to (b), preferably, the tappet structure 6 is basically composed of the following components: a spring piece 10; a base body ...

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PUM

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Abstract

The present invention provides a fuel supply pump which is suitably used in a booster-type accumulator fuel injection device and a tappet structural body which is suitable for the fuel supply pump. For this end, in a tappet structural body which includes a roller and a tappet body portion which houses a roller therein and a fuel supply pump provided with the tappet structural body, the roller is rotatably held on a roller receiver of the tappet body portion and the tappet structural body includes a plate-like or a wire-like restricting means which restricts the movement of the roller in the rotary axis direction.

Description

technical field [0001] The present invention relates to a fuel supply pump and a tappet structure. In particular, it relates to a lifter structure suitable for a pressurized accumulator type fuel injection device with little damage to the inner peripheral surface of the pump casing due to the end of the roller even when the pump rotates at a high speed, and a lifter having the same. A fuel supply pump for a rod structure. Background technique [0002] Conventionally, various accumulator-type fuel injection devices using a pressure accumulator (common rail system; common rail) for efficiently injecting high-pressure fuel in diesel engines and the like have been proposed. [0003] As a fuel supply pump used in such an accumulator fuel injection device, a pump having the following components is used: a cam that rotates integrally with a camshaft driven by the engine; a plunger that is raised and lowered by the rotation of the cam; The rotation of the plunger is transmitted to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M59/10F02M47/00F02M59/44F02M47/02F02M57/02F02M63/02F04B1/04
CPCF02M47/027F04B1/0439F02M59/102F02M63/0225F02M57/025F02M57/026Y10T74/2107F02M59/10F02M47/00F04B1/04F02M59/44
Inventor 青木伸夫福原祐介黛欣司
Owner BOSCH CORP
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