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Fuel injection nozzle and fuel injection valve, and fuel injection control system using the same

A fuel injection valve, fuel injection technology, applied in the direction of fuel injection pumps, fuel injection devices, special fuel injection devices, etc., can solve the problems that fuel cannot be injected, the amount of HC increases, smoke increases, etc.

Inactive Publication Date: 2011-05-18
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when the engine is operating at a low or medium load, fuel is injected when the piston descends (that is, during the expansion stroke), and the fuel injection direction gradually changes upward as the piston descends, and as a result, fuel cannot be injected into the combustion chamber in the piston
In this way, the problem arises that the fuel spray hits a wall area of ​​the combustion chamber in the piston that is not located in the target area on the wall, causing an increase in the amount of smoke, and the fuel consisting of larger droplets The spray adheres to the wall surface of the cylinder of the internal combustion engine and / or adheres to the lip portion of the combustion chamber in the piston, resulting in an increase in the amount of HC

Method used

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  • Fuel injection nozzle and fuel injection valve, and fuel injection control system using the same
  • Fuel injection nozzle and fuel injection valve, and fuel injection control system using the same
  • Fuel injection nozzle and fuel injection valve, and fuel injection control system using the same

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no. 1 example

[0039] A first embodiment of the present invention will be described. figure 1 is a schematic sectional view showing a fuel injection control system employing the fuel injection nozzle according to the first embodiment. figure 2 and 3 is showing fuel from figure 1 A schematic cross-sectional view of the direction in which the fuel injection valve is injected. figure 2 The operating state of the piston is shown in a position away from top dead center. image 3 The operating state is shown with the piston in a position close to top dead center.

[0040] Such as figure 2 and 3 As shown, a compression ignition type internal combustion engine 9 has a piston 92 inserted into a cylinder 91 so as to be reciprocable, and a fuel injection valve 1 is fitted in a cylinder head 93 . A combustion chamber 921 is formed at the top of the piston 92 .

[0041] Such as figure 1 As shown, the fuel injection control system includes: a fuel injection valve 1 that injects fuel into an int...

no. 2 example

[0061] A second embodiment of the present invention will be described. Figure 6 is a schematic sectional view showing a fuel injection control system employing a fuel injection nozzle according to a second embodiment.

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Abstract

Needles include a cylindrical outer needle that is brought into contact with and moved away from a nozzle body (113) to open and close an injection hole (1132), and an inner needle (112) slidably inserted in the outer needle (111), that is moved into and out of a sack-tip-portion space (171). When the inner needle (112) enters the sack-tip-portion space (171) and completely occupies the sack-tip-portion space (171), the fuel injection direction B is made downward relative to the injection-hole central axis C. Thus, it is possible to control the fuel injection direction B by controlling the amount of lift of the inner needle (112).

Description

technical field [0001] The present invention relates to a fuel injection nozzle and a fuel injection valve by which the direction in which fuel is injected through an injection hole can be controlled, and to a fuel injection control system using the fuel injection nozzle or the fuel injection valve. Background technique [0002] A conventional fuel injection control system controls the direction in which fuel is injected through the injection hole by controlling the flow of fuel flowing into the injection hole using the position to which the needle is lifted (see, for example, Japanese Patent Application Publication No. 2002-115629 (JP-A-2002 -115629)). Specifically, when the position to which the needle is lifted is high (the lifting amount is large), the fuel flow toward the injection hole is sharply bent, and the fuel injection direction is upward with respect to the central axis of the injection hole. Specifically, as the needle is lifted, the fuel injection direction i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M45/08F02M47/02F02M61/18F02M59/46
CPCF02M45/086F02M51/0617F02M47/027F02M2200/46F02M61/182F02M51/061F02M63/0017
Inventor 林朋博菱沼修伊藤昌晴田中章雄大前和弘
Owner TOYOTA JIDOSHA KK