Fuel injection valve

A fuel injection valve and fuel technology, applied in the directions of fuel injection device, injection device, charging system, etc., can solve the problem of inability to obtain fuel flow, unreasonable relative position relationship between valve seat hole and fuel injection hole, insufficient atomization, etc. problem, to achieve the effect of reducing exhaust emissions, stabilizing direction and shape, and preventing retention
CN1864007AActive Publication Date: 2006-11-15HITACHI ASTEMO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HITACHI ASTEMO LTD
Publication Date
2006-11-15

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Abstract

A fuel injection valve where a conical valve seat (8) and a valve seat hole (7) continues to the downstream end of the valve seat (8) is provided in a valve seat member (3), a flat fuel diffusion chamber (43) radially expanding from the valve seat hole (7) is formed between the valve seat member (3) and an injector plate (10), and fuel injection holes (11) opened to the fuel diffusion chamber (43) are provided in the injector plate (10). The fuel injection holes (11) are arranged to be separated radially outward from the valve seat hole (7) and at the same time to satisfy t2 / t1 >= 2, with t1 the height of the fuel diffusion chamber (43) and t2 the length of the valve seat hole (7). This reasonably sets a magnitude relationship between the length of the valve seat hole and the height of the fuel diffusion chamber and sets also a relative positional relationship between the valve seat hole and the fuel injection holes. As a result, injected fuel is effectively atomized.
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Description

technical field

[0001] The present invention mainly relates to a fuel injection valve used in a fuel supply system of an internal combustion engine, and in particular to an improvement of a fuel injection valve provided with a conical valve seat member cooperating with a valve portion of a valve assembly. The valve seat and the valve seat hole connected to the downstream end of the valve seat. In addition, between the above-mentioned valve seat member and the injection plate joined to it, there is formed a A flat fuel diffusion chamber expanding in direction, and a plurality of fuel injection holes opening to the fuel diffusion chamber are perforated on the injection plate. Background technique

[0002] Such a fuel injection valve for an internal combustion engine is known as disclosed in Patent Document 1 below.

[0003] Patent Document 1: Japanese Patent Laid-Open No. 2000-97129

[0004] The purpose of this type of fuel injection valve for an internal combustion engine i...

Claims

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