Resonance hole-plate type electronic control fuel injector with carved grooves

A technology of electronically controlled fuel injection and fuel injectors, which is applied in the direction of fuel injection devices, machines/engines, and charging systems, etc. Solve problems such as large oil return, achieve the effects of reducing energy loss, improving emission stability and economy, and reducing fuel pressure fluctuations

Pending Publication Date: 2017-04-26
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This part of high-pressure fuel is pressurized by the oil pump, but it returns directly to the fuel tank without doing work. The dynamic oil return is large, resulting in energy loss
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Method used

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  • Resonance hole-plate type electronic control fuel injector with carved grooves
  • Resonance hole-plate type electronic control fuel injector with carved grooves
  • Resonance hole-plate type electronic control fuel injector with carved grooves

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Effect test

Embodiment Construction

[0024] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0025] to combine Figure 1-6 , The present invention includes an injector head 1 , a restrictor valve assembly 3 , a solenoid valve assembly 5 , a needle valve assembly 6 , a nozzle 7 , a tight cap 9 , and an injector body 10 . The fuel injector head 1 is mounted on the fuel injector body 10 through threaded fitting connection, and is sealed by the sealing ring 2 placed on the fuel injector body 10 . A main oil inlet hole 12 is arranged in the injector head 1 and communicates with the pressure accumulator chamber 11 in the injector body 10 . A restrictor valve assembly 3 is arranged below the accumulator chamber 11 . The flow limiting valve assembly 3 is installed inside the fuel injector body 10, and its main structure includes a retaining ring 13, a damping spring 14, a ball valve 16, a support control slider 17, a ball valve return spring 22, a ball valve re...

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PUM

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Abstract

The invention aims to provide a resonance hole-plate type electronic control fuel injector with carved grooves. The resonance hole-plate type electronic control fuel injector comprises a fuel injector body, a flow-limiting valve assembly, an electromagnetic valve, a needle valve assembly and a jet nozzle. The fuel injector body is internally provided with a pressure accumulation cavity which communicates with a main fuel inlet and the flow-limiting valve assembly, so that stability of fuel injection processes of all cylinders is guaranteed in the large-pulse-width fuel injection process. The bottom of the flow-limiting valve assembly is provided with a resonance through hole and a resonance throttling hole, and fluctuation of fuel passing through the flow-limiting valve assembly is effectively reduced. Through two-path fuel feeding of a hole-plate throttling hole and an annular side face fuel path, the pressure building-up process of a control cavity is accelerated, and the falling response speed of a needle valve is increased. The surface of the needle valve is provided with the grooves of micron-level depth, hole flowing stability can be effectively improved, and the cavitation erosion degree of the fuel injector is lowered. Through a hole-plate structure machined in the needle valve assembly, the dynamic fuel return quantity in the fuel spraying process is effectively reduced, and the effect of micro-dynamic fuel return is achieved.

Description

technical field [0001] The invention relates to an engine fuel injection device, in particular to a high-pressure common rail fuel injection device. Background technique [0002] At present, the market is gradually adopting high-speed solenoid valve injectors to meet the latest emission regulations. The prominent feature of this electronically controlled fuel injector is to use the electrical signal output by the electronic control unit to control the high-speed solenoid valve to achieve flexible fuel injection rules. The fuel injector with high-speed solenoid valve has fast system response, high control precision and the ability to inject multiple times. But this electronically controlled fuel injector also has a place to be improved: during the fuel injection process, there is always high-pressure fuel flowing through the inlet and outlet orifices. This part of high-pressure fuel is pressurized by the oil pump, but returns directly to the fuel tank without doing any work...

Claims

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Application Information

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IPC IPC(8): F02M47/02F02M61/10F02M61/18F02M63/00
CPCF02M47/027F02M61/10F02M61/1893F02M63/0017F02M63/0035F02M63/0036F02M63/007
Inventor 范立云刘鹏路勇马修真
Owner HARBIN ENG UNIV
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