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Fuel injector with built-in positive temperature coefficient ceramic heating material

A positive temperature coefficient, ceramic heating technology, used in charging systems, machines/engines, fuel injection devices, etc.

Inactive Publication Date: 2009-07-29
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no relevant literature report on the construction of positive temperature coefficient electrothermal materials in diesel engine injectors

Method used

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  • Fuel injector with built-in positive temperature coefficient ceramic heating material

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Embodiment Construction

[0007] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0008] Such as figure 1 As shown, the present invention mainly includes: nozzle hole 1, fuel injector oil tank 2, fuel injector needle valve 3, fuel injector needle valve body oil inlet hole 4, fuel injector needle valve body oil inlet lower spin groove 5, Fuel injector needle valve body oil inlet upper spin groove 6, fuel injector tight cap 7, fuel injector body 8, fuel injector tappet 9, fuel injector pressure regulating spring lower seat 10, fuel injector pressure regulating spring 11 , Fuel injector pressure regulating nut 12, Fuel injector pressure regulating spring upper seat 13, Fuel injector pressure regulating screw 14, Fuel injector protective cap 15, Injector body heat conduction round tube 16, Fuel injector body heat conduction round tube inlet Oil hole 17, injector body oil inlet hole 18, heating electrode negative electrode...

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Abstract

A fuel injector with a built-in positive temperature coefficient ceramic heating material mainly includes: a fuel injector needle valve, a fuel injector needle valve body, a fuel injector body, a fuel injector tappet, a fuel injector pressure regulating spring, a fuel injector Heat conduction round tube in the body, positive temperature coefficient heating ceramics in the fuel injector body, insulating sheath in the fuel injector body, heat conduction round tube in the oil inlet bolt, positive temperature coefficient heating ceramics in the oil inlet bolt, insulating sheath in the oil inlet bolt, etc. The positive temperature coefficient heating ceramics are placed in the oil inlet bolt and the fuel injector, and the self-limiting temperature of the diesel is heated through the heat conduction tube, and insulated through the insulating sheath. The invention provides a self-limiting temperature heating fuel injector for diesel oil in the process of cold start and warm-up, the heating temperature will not exceed the boiling point of diesel oil, the required heating amount is less, and the heating speed is faster, which can effectively Improve diesel engine emissions and improve its cold start performance.

Description

technical field [0001] The invention relates to a fuel injector for an internal combustion engine, in particular to a fuel injector with a built-in positive temperature coefficient ceramic heating material, which belongs to the technical field of internal combustion engines. Background technique [0002] Compression ignition engines using diesel as fuel have high thermal efficiency and are widely used. Due to the large output of diesel, which dominates the fuel consumption of diesel engines, diesel engines will still use diesel as fuel for a long time in the future. However, the main problems of diesel engines are not only emission problems, but also the improvement of cold start performance. In order to reduce cold start emissions, many technologies have been adopted to improve the emission and cold start performance of diesel engines. In the prior art, the document "Research on Low-temperature Starting of Diesel Engine Using Intake Flame Preheating" ("Internal Combustion ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M53/06F02M53/02
Inventor 李孝禄王君李迎李运堂陈红岩孙在方晓敏
Owner CHINA JILIANG UNIV
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