Diesel/natural gas double fuel direct injection device

Abstract

The invention provides a diesel / natural gas double fuel direct injection device including a constant volume bomb, a sparking plug, a natural gas pipe, a fuel pipe union, a constant volume bomb adapter, a natural gas ejector, a diesel ejector and a diesel ejector supporting frame. The constant volume bomb adapter is installed on the top of the constant volume bomb. The natural gas pipe is installedon the constant volume bomb adapter. The lower end of the natural gas pipe is connected with the top end of the natural gas ejector in a threaded mode. The upper end of the diesel ejector supportingframe is connected with the bottom of the constant volume bomb adapter and the lower end of the diesel ejector supporting frame is connected with the lower end of the diesel ejector in a detachable mode. A top electrode of the sparking plug is connected with an ECU output circuit and a bottom electrode of the sparking plug is connected with power connections of the diesel ejector and the natural gas ejector separately. The position of the diesel ejector can be flexibly adjusted and the distance between a diesel spraying hole and a natural gas spraying hole can be as small as 3mm. The interaction of double fuels is researched more advantageously. The diesel / natural gas double fuel direct injection device realizes the mixing of direct injection of the double fuels and provides research datafor the exploration of a direct injection engine for a diesel ignited natural gas cylinder.

Description

technical field [0001] The invention belongs to the research field of dual-fuel engines, and in particular relates to a diesel / natural gas dual-fuel direct injection device. Background technique [0002] With the expansion of industrial consumption and living consumption, my country's demand for energy continues to rise, while the problems caused by the over-exploitation of fossil resources, such as diesel and gasoline, have become increasingly prominent. The deepening of energy and environmental crisis has seriously affected the healthy and rapid development of my country's economy and society. In addition, my country's environmental protection regulations have been continuously upgraded, and the National IV emissions have been fully implemented, which has a great impact on the diesel engine industry. It can be seen that the development and utilization of clean energy is imperative. As a clean alternative fuel, natural gas has relatively abundant reserves in my country. ...

AI Technical Summary

Problems solved by technology

However, the injector requires extremely high machining accuracy and complex structure, which is difficult to achieve in China at present.

[0003] The dual-fuel injection device and method mentioned in the above-mentioned patent cannot realize the direct injection technology of diesel pilot natural gas cylinder

At present, the core of this technology is monopolized by foreign companies, and the country is still in a technical blank

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