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Single double-needle valve double-nozzle high-pressure common rail oil injector for medium-heavy diesel engine

A technology of high-pressure common rail and double nozzles, which is applied in the direction of machines/engines, mechanical equipment, engine components, etc., to achieve the effect of size reduction and improvement of vibration and noise levels

Pending Publication Date: 2018-08-24
李玉龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is no application example for dual-nozzle injectors on diesel engines

Method used

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  • Single double-needle valve double-nozzle high-pressure common rail oil injector for medium-heavy diesel engine
  • Single double-needle valve double-nozzle high-pressure common rail oil injector for medium-heavy diesel engine
  • Single double-needle valve double-nozzle high-pressure common rail oil injector for medium-heavy diesel engine

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Experimental program
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Embodiment Construction

[0025] Such as figure 1 As shown, the high-pressure common rail fuel injector with single double needle valve and double nozzles of the present invention includes a magnetic core valve seat 3, a ball valve ram base mounting nut 12, a ball valve ram base 13, a ball valve base 16, and a valve needle control rod base 18. Install the nut 20 and the valve body 22 of the oil nozzle.

[0026] There are two solenoid valves inside the magnetic core valve seat, and each solenoid valve has an armature pressing ring 4, a solenoid valve armature 5, a magnetic core fixing pressing ring 6, a magnetic isolation ring 7, a solenoid valve coil 8, and a solenoid valve magnet. Core 9, air gap adjustment ring 10, armature preload spring 11 and ball valve ejector rod 15. Using the friction force generated by the interference fit between the armature pressing ring 4 and the end of the ball valve mandrel 15, the solenoid valve armature 5 is fixed on the ball valve mandrel 15; the magnetic core fixing...

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Abstract

The invention provides a single double-needle valve double-nozzle high-pressure common rail oil injector for a medium-heavy diesel engine. The single double-needle valve double-nozzle high-pressure common rail oil injector comprises a magnetic core valve seat, a ball valve ejector rod base mounting screw cap, a ball valve ejector rod base, a valve needle control rod base, an oil nozzle mounting screw cap and an oil nozzle valve body; two electromagnetic valves are arranged in the magnetic core valve seat, two valve needle control rods are arranged in the valve needle control rod base, two valve needle cavities are formed in the oil nozzle valve body, two oil nozzles are arranged at the lower ends of the valve needle cavities, and two oil nozzle valve needles which are connected with the two valve needle control rods and are used for controlling the two oil nozzles are arranged in the valve needle cavities. In addition, a ball valve ejector rod and a high-pressure sealing ball valve arearranged in a split mode, and the ball valve ejector rod is designed into a large-diameter section and a small-diameter section, so that the needed electromagnetic force is further reduced. The function of the high-pressure common rail oil injector is more suitable for a diesel engine to inject diesel oil compared with a traditional oil injector, under the condition that the pressure of a fuel system is not increased, the atomization effect of high-pressure diesel injection can be further improved, and the emission level of an engine original machine can be improved; and meanwhile, the oil spraying rate rule is optimized, and the power level of the diesel engine is further explored.

Description

technical field [0001] The invention relates to the field of fuel supply systems for diesel engines, in particular to a single double needle valve double nozzle high pressure common rail fuel injector suitable for medium and heavy diesel engines. Background technique [0002] In order to improve the fuel economy of the diesel engine, improve the emission of the original harmful gas of the engine, and optimize the noise and vibration of the diesel engine, it is necessary to improve the effect of air and fuel mixing and atomization, and to control the fuel injection rate to achieve the trend of first slowing down and then rushing. In the current high-pressure common rail system for diesel engines that is the absolute dominant solution in the market, the general consensus and method is to continuously increase the fuel pressure level of the common rail system and increase the injection pressure in order to enhance the fuel atomization effect, for example, from the more common 16...

Claims

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Application Information

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IPC IPC(8): F02M61/10F02M51/06F02M61/18
CPCF02M51/061F02M61/10F02M61/1893
Inventor 李玉龙
Owner 李玉龙
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