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Valve seat for gaseous fuel injector

A technology for fuel injectors and valve seats, which is applied in fuel injection devices, charging systems, combustion engines, etc., and can solve problems such as difficulty in arcuate channels, increasing the complexity and cost of fuel injectors, etc.

Inactive Publication Date: 2011-08-03
DELPHI TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, adding a central fuel runner to the valve in order to supply fuel to the inner diameter of the wall adds complexity and cost to the fuel injector
Another disadvantage of this structure is that it is difficult to form the arcuate channel of the valve seat using metal injection molding (MIM) and powder metal processes

Method used

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  • Valve seat for gaseous fuel injector
  • Valve seat for gaseous fuel injector
  • Valve seat for gaseous fuel injector

Examples

Experimental program
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Embodiment Construction

[0013] According to the preferred embodiment of the present invention and with reference to figure 1 , shows a portion of the fuel injector 10 for supplying fuel to the fuel consumer 12 . Fuel injector 10 includes a fuel inlet 14 for receiving fuel, a fuel outlet 16 for dispensing fuel from fuel injector 10 , and conduits for communicating fuel from fuel inlet 14 to fuel outlet 16 . Fuel inlet 14 is upstream of fuel outlet 16 .

[0014] now refer to Figure 1 to Figure 3 , the valve assembly 20 is used to selectively prevent and allow fuel to pass from the fuel inlet 14 to the fuel outlet 16 . The valve assembly 20 includes a valve seat 22 having an upstream face 24 and a downstream face 26 . The upstream face 24 is upstream of the downstream face 26 . The valve seat 22 divides the conduit 18 into an upstream portion 19 upstream of the valve seat 22 and a downstream portion 21 downstream of the valve seat 22 . A plurality of holes 28 pass through the valve seat 22 to prov...

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PUM

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Abstract

The present invention relates to a valve seat for a gaseous fuel injector. The gaseous fuel injector is provided with a fuel inlet, a fuel outlet, and a conduit for communicating fuel from the inlet to the outlet. A valve and valve seat is provided for selectively preventing and permitting fuel to pass from the fuel inlet to the fuel outlet. The valve seat has a plurality of apertures for providing fluid communication therethrough. The valve has a sealing face for selectively engaging and disengaging the valve seat to selectively prevent and permit fuel from passing therethrough. The valve seat includes a raised seating surface for sealing against the sealing face when the valve is engaged with the valve seat. The raised seating surface is defined by at least one wall that continuously surrounds each aperture. Each wall is in continuous fluid communication with the entirety of each wall downstream of the sealing face when the valve is engaged with the valve seat.

Description

technical field [0001] The present invention relates to fuel injectors for supplying fuel to fuel consumers, more particularly to fuel injectors for supplying gaseous fuel to internal combustion engines, and especially to valve seats for such fuel injectors. Background technique [0002] One type of fuel used to power internal combustion engines and other fuel consuming devices is gaseous fuel, such as natural gas in the form of compressed natural gas (CNG) or liquefied petroleum gas (LPG). Fuel injectors for supplying metered gaseous fuel to fuel consumers such as internal combustion engines are known. In a typical fuel injector, a valve is located within a fuel passage of the fuel injector and reciprocates axially into and out of valve seat to control fuel flow through the fuel injector. There are several known structures of the interface between the valve and the corresponding valve seat. [0003] A valve and seat arrangement is shown in US Patent No. 6,405,947. In thi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M61/18F02M21/02
CPCF02M51/0682F02M21/0266Y02T10/32F02M61/1886F02M61/1853Y02T10/30
Inventor M·M·富吉塔A·R·威尔斯K·J·道尔
Owner DELPHI TECH INC