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Electronically controlled high-pressure fuel injector for quick fuel cut-off

A high-pressure fuel injection and fuel injector technology, which is applied to machines/engines, fuel injection devices, engine components, etc., can solve problems such as economic deterioration, shortened afterburning, and harmful emissions of soot, so as to improve economy and emissions. Indicator, afterburn suppression effect

Active Publication Date: 2017-05-24
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Afterburning means that the fuel that has not had time to completely burn in the slow combustion stage continues to burn during the expansion stroke, which is prone to produce soot and harmful emissions, resulting in economical deterioration. Therefore, the ideal combustion law always hopes to shorten the afterburning

Method used

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  • Electronically controlled high-pressure fuel injector for quick fuel cut-off
  • Electronically controlled high-pressure fuel injector for quick fuel cut-off
  • Electronically controlled high-pressure fuel injector for quick fuel cut-off

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Embodiment Construction

[0028] Preferred embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be understood, however, that these descriptions are exemplary only and are not intended to limit the scope of the invention.

[0029] In order to explain this invention in detail, it demonstrates referring drawings. figure 1 is a schematic cross-sectional view of the first embodiment of the electronically controlled high-pressure fuel injector of the present invention, figure 2 yes figure 1 The enlarged view of the main part.

[0030] In this application, the electromagnet 10 side of the electronically controlled high-pressure fuel injector 1 ( figure 1 and figure 2 The upper side) is called the upper side, and the nozzle hole 16 side ( figure 1 and figure 2 The lower side) is called the lower side, however, this is only a definition for the convenience of explanation, and does not represent the real installation direction of the...

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Abstract

The invention provides an electrically controlled high-pressure fuel injector for realizing quick fuel cut. The electrically controlled high-pressure fuel injector is characterized in that a main fuel intake orifice (7b1) and a fuel drainage passage are formed in a control valve body (7b); one end of the main fuel intake orifice (7b1) is communicated with a high-pressure fuel passage (75b), and the other end of the main fuel intake orifice (7b1) is communicated with a pressure control room (70) and used for supplying fuel for the pressure control room (70); one end of the fuel drainage passage is communicated with the pressure control room (70), and the other end of the fuel drainage passage is communicated with an opening and closing element sealed part of the control valve body (7b) and used for draining fuel in the pressure control room (70) when the opening and closing element sealed part is unsealed; and an auxiliary fuel intake orifice (7b11) is also formed in the control valve body (7b), one end of the auxiliary fuel intake orifice (7b11) is communicated with the fuel drainage passage, and the other end of the auxiliary fuel intake orifice (7b11) is communicated with the high-pressure fuel passage (75b). By virtue of the reasonably matched aperture, the electrically controlled high-pressure fuel injector can obtain the ideal fuel injection rule that the fuel cut curve sharply drops, effectively prevents an aviation heavy-oil piston engine from post-combustion and greatly improves the economic indicators and emission allowances.

Description

technical field [0001] The invention relates to an electronically controlled high-pressure fuel injector for realizing rapid fuel cutoff, which is applied to an electronically controlled high-pressure fuel injection system of an aviation heavy fuel piston engine. Background technique [0002] Aviation heavy oil piston engine is an important driving force for future aviation, especially the main driving force for general aviation and unmanned aerial vehicles. It is the most advanced aviation engine technology in the world today, with good power, economy, emission, safety, reliability and health characteristics. . [0003] The electronically controlled high-pressure fuel injection system is an important technology for aviation heavy fuel piston engines to realize time-pressure controlled injection of heavy fuel, optimize combustion and thermal cycle, and obtain good power, economy, comfort and emission indicators. The fuel injection pressure of the electronically controlled h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M51/06F02M61/16
CPCF02M51/06F02M61/16
Inventor 张可周明牟学利
Owner TSINGHUA UNIV
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