Combined supercharged and non-supercharged double electromagnetic gas injection device

Abstract

The invention provides a combined supercharging and non-supercharging double solenoid fuel gas injection device. The device comprises a supercharging part, a double solenoid valve part, a double control piston part, a double needle valve nozzle part and an injection device shell, wherein the double solenoid valve part, the double control piston part and the double needle valve nozzle part are arranged in the injection device shell from top to bottom in sequence; and the supercharging part is located above the injection device shell. One path of fuel gas flow passes through the supercharging part and then flows into nozzles, and the other path of fuel gas flow directly flows into the nozzles. The processes of fuel gas supercharging and fuel gas injection of the two nozzles are controlled by three solenoid valves correspondingly, and the device has the characteristics of being rapid in response and capable of accurately controlling the fuel gas injection amount. The nozzles with supercharging pistons can be randomly switched between the supercharging mode and the non-supercharging mode, so that the requirements of engines for fuel gas injection pressure under different working conditions are met. By adopting the device, variable flow, mixed pressure and variable pressure fuel gas injection can be realized, the fuel gas injection pressure can be adjusted in a working cycle, and the requirements of the engines and series engines for power under the different working conditions are met.

Description

technical field [0001] The invention relates to a gas injection device for a dual-fuel engine. Background technique [0002] With the continuous consumption of fossil fuels and the increasingly stringent emission regulations of internal combustion engines, the development of engines is facing the dual pressure of energy crisis and environmental pollution. The use of alternative fuels is an effective means to solve both energy problems and environmental pollution. Natural gas and petroleum gas have become the main substitute fuels for internal combustion engines due to their abundant resources, low price, clean combustion, and high calorific value. [0003] The current in-cylinder direct injection gas injection system mainly controls the movement of the needle valve through the internal integrated high-speed solenoid valve to realize the opening and closing of the gas injection valve, which can control the timing and amount of gas injection, and has good energy saving and emi...

AI Technical Summary

Problems solved by technology

[0003] The current in-cylinder direct injection gas injection system mainly controls the movement of the needle valve through the internal integrated high-speed solenoid valve to realize the opening and closing of the gas injection valve, which can control the timing and amount of gas injection, and has good energy saving and emission reduction effect, but there are some problems: first, the single-cylinder power coverage of the engine is large, and only the single-nozzle jet device is used to match the limited engine power, which cannot meet the power of the engine under different working conditions and the power requirements of serialized engines; ; A single high-speed solenoid valve only has two working states of on and off, and cannot complete the multi-mode control of gas injection; thirdly, in order to improve the degree of gas mixing, the gas injection pressure is usually increased, and the existing gas injection device cannot operate within one working cycle. The injection pressure can be adjusted; Fourth, with the movement of the needle valve, the gas leaks upward along the gap between the needle valve coupler, and the leaked gas enters the control chamber, resulting in a decrease in the gas injection pressure and injection rate, which seriously affects the working stability of the injection device

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