Valve rod assembly and high-pressure fuel injection valve

A technology of injection valves and components, applied in fuel injection devices, charging systems, engine components, etc., can solve problems such as slowing down the opening speed of the piston rod or valve needle, speeding up the closing speed of the piston rod or valve needle, and achieving poor control Combustion, improved pre-injection effects, and reduced pollutant emissions

Pending Publication Date: 2021-05-14
钧风电控科技泰州有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the embodiment of the present invention is a valve stem assembly and a high-pressure fuel injection valve, to solve the problem of slowing down the opening speed of the piston rod or valve needle, accelerating the closing speed of the piston rod or valve needle, and improving the response of small fuel injection and low fuel pressure injection technical issues with speed

Method used

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  • Valve rod assembly and high-pressure fuel injection valve
  • Valve rod assembly and high-pressure fuel injection valve
  • Valve rod assembly and high-pressure fuel injection valve

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Embodiment Construction

[0028] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present application as recited in the appended claims.

[0029] The terminology used in this application is for the purpose of describing particular embodiments only, and is not intended to limit the application. As used in this application and the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term...

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PUM

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Abstract

The invention relates to the technical field of high-pressure fuel injection valves, and discloses a valve rod assembly. The valve rod assembly comprises a control rod, a valve needle, an upper sleeve, a lower sleeve, a reset spring, an adjusting ring and an adjusting pad. The lower end of the control rod stretches into the upper sleeve, the adjusting ring is arranged outside the control rod in a sleeving manner, the two ends of the adjusting ring are connected with the upper end face of the upper sleeve and a shaft shoulder of the control rod in an abutting manner correspondingly, the valve needle stretches into the lower sleeve, the lower sleeve abuts against the lower end face of the upper sleeve through the reset spring, the upper face and the lower face of the adjusting pad are connected with the control rod and the valve needle in an abutting manner correspondingly, and the upper sleeve, the lower sleeve, the control rod, the valve needle and the adjusting pad jointly form a sealed coupling cavity. The invention further discloses a high-pressure fuel injection valve which comprises the valve rod assembly.

Description

technical field [0001] The invention relates to the technical field of high-pressure fuel injection valves, in particular to a valve stem assembly and a high-pressure fuel injection valve. Background technique [0002] In today's world, the emission of powertrain pollutants has become the focus of attention of the international community. With the increasingly stringent emission regulations, the electronically controlled fuel injection system for engines that can realize high-pressure and precise control of injection has become the only technical route for diesel engine technology. In order to achieve effective control of pollutant emissions, it is necessary to precisely control the opening and closing of the injection process, so that the injection waveform can reach the state of slow first and then fast. The response is quick, which is beneficial to the engine to form a more uniform combustible mixture, which can reduce fuel consumption, reduce pollutant emissions and impr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M63/00
CPCF02M63/007F02M63/0028F02M63/0029
Inventor 徐小松孙炳晓戴宏伟潘慧杨涛程雪媛
Owner 钧风电控科技泰州有限责任公司
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