Nozzle for direct-injection engine

An engine and nozzle technology, applied in the direction of engine components, machines/engines, mechanical equipment, etc., can solve the problems of poor ignition stability, complex nozzle structure, high processing cost, and achieve increased spray angle, good atomization stability, The effect of improving the quality of atomization

Inactive Publication Date: 2010-06-16
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the back pressure is slightly higher, the spray is squeezed seriously, causing the spray to shrink and deform away from the position of the spark plug, resulting in poor ignition stability; moreover, the structure of this nozzle is relatively complicated, and the processing cost is relatively high

Method used

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  • Nozzle for direct-injection engine
  • Nozzle for direct-injection engine
  • Nozzle for direct-injection engine

Examples

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Embodiment Construction

[0017] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0018] Such as figure 1 and figure 2 As shown, this embodiment includes: a housing 1, a valve stem 2, an oil injection hole 3, eight oil inlet holes 4 and an oil passage 5, wherein: the oil injection hole 3 and the oil inlet hole 4 are respectively arranged on the bottom of the housing 1 At both ends, the oil passage 5 is located in the housing 1 and the two ends are respectively connected with the oil inlet hole 4 and the oil injection hole 3, and one end of the valve stem 2 is set inside the housing 1 near the oil inlet Central of Road 5.

[0019] The diameter D of the injection hole 3 is 0.2 mm, and the numb...

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Abstract

The invention relates to a nozzle for a direct-injection engine in the technical field of automobile engines, which comprises a shell, a valve rod, an oil-injection hole, an oil supply hole and oil ways, wherein the oil-injection hole and the oil supply hole are arranged at both ends of the shell respectively; the oil way is positioned in the shell, and both ends of the oil ways are connected with the oil supply hole and the oil-injection hole respectively; one end of the valve rod is arranged inside one side of the shell close to the oil supply hole and is positioned at the center of a plurality of oil ways. The nozzle enables fuel to generate swirl, can ensure the large spray cone angle (namely dispersibility) under the low injection pressure and high backpressure, and simultaneously, avoid undesirable tip injection of atomization, so that the atomization performance of the nozzle is improved.

Description

technical field [0001] The invention relates to a device in the technical field of automobile engines, in particular to a nozzle for a direct-injection engine. Background technique [0002] In the second half of the 1990s, the research methods of internal combustion engines represented by numerical simulation and visualization developed rapidly. At the same time, the electronic control technology with high precision and fast response became more and more mature, which made the research on gasoline direct injection (GDI) get a great development. . Mitsubishi, Toyota, Nissan, Ford, Mercedes-Benz, Volkswagen, Mazda, Audi, Honda, Fiat, Renault, AVL, FEV and many other foreign automobile companies and research institutions have developed GDI products or prototypes. These in-cylinder direct injection gasoline engines have shown obvious advantages compared with conventional port injection (PFI) gasoline engines. Some data show that compared with traditional PFI gasoline engines, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M61/18
Inventor 张玉银许敏陈豪
Owner SHANGHAI JIAO TONG UNIV
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