Intake voltage regulator device for high pressure direct injection natural gas engine based on variable coherent wavelength

Abstract

The invention discloses a high-pressure direct-injection natural gas engine intake pressure stabilizing device based on a variable coherent wavelength, which includes a natural gas pressure adjustment unit, a temperature sensor, a buffer tank, a buffer tank cut-off valve, a 1 / 4 wavelength tube assembly, a pressure sensor, The second high-pressure natural gas pipeline and the 1 / 4 wavelength tube effective length adjustment device; the first high-pressure natural gas pipeline is provided with a natural gas pressure adjustment unit, a temperature sensor, a second high-pressure natural gas pipeline, a 1 / 4 wavelength tube assembly and a pressure sensor ; One end of the second high-pressure natural gas pipeline is connected to the side opening of the first high-pressure natural gas pipeline, and the other end is connected to a buffer tank; the second high-pressure natural gas pipeline is provided with a buffer tank stop valve; 1 / 4 wavelength tube assembly has several A 1 / 4 wavelength tube, each 1 / 4 wavelength tube is connected to the side opening of the first high-pressure natural gas pipeline; each 1 / 4 wavelength tube is controlled to be connected to the first high pressure through the effective length adjustment device of the 1 / 4 wavelength tube The length in the natural gas line.

Description

technical field [0001] The invention belongs to the field of in-cylinder high-pressure direct-injection natural gas engines, in particular to a high-pressure direct-injection natural gas engine intake voltage stabilizing device based on a variable coherent wavelength. Background technique [0002] Particulate emissions from heavy-duty diesel vehicles account for more than 70% of commercial vehicle particulate emissions, and are one of the important pollution sources in large-area foggy weather. The main component of natural gas is methane, and the combustion produces less soot. Using natural gas as fuel for heavy-duty vehicles can reduce harmful emissions and improve the environment. In-cylinder high-pressure direct-injection natural gas engine injects natural gas into the cylinder in the form of high pressure, and adopts the diffusion combustion method, which eliminates the limitation of knocking and improves the thermal efficiency of the natural gas engine. In order to pr...

AI Technical Summary

Problems solved by technology

Due to the problem of large pressure fluctuations in the pressurization process of the plunger pump, there are pressure fluctuations in the high-pressure gas circuit. This fluctuation reduces the measurement accuracy of the flowmeter and cannot accurately measure the gas consumption rate, making the actual injection volume of natural gas and the theoretical There is a certain difference in the injection quantity, which reduces the control accuracy of the electronic control system and affects the combustion and emission of the engine.

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