Double-medium pressure accumulation device with pressure offset adjusting function

Abstract

The invention provides a double-medium pressure accumulation device with a pressure offset adjusting function. The double-medium pressure accumulation device comprises an integrated pressure accumulator, and a first pressure accumulation cavity and a second pressure accumulation cavity which are independent of each other are formed in the pressure accumulator; the pressure accumulator is provided with a pressure adjusting cavity, a first medium inlet, a first medium injection connector, a second medium inlet and a second medium injection connector; and a pressure adjusting part is arranged in the pressure adjusting cavity, and the pressure adjusting part can move in the pressure adjusting cavity to achieve connection and disconnection between the first pressure accumulation cavity and a first medium pressure relief opening. By adoption of the integrated pressure accumulator, the structural stability and the equipment integration degree are improved, installation is convenient, the material cost and the installation cost are reduced, the pressure adjusting part is used for maintaining the fixed pressure difference between two media, the double-medium pressure accumulation device is suitable for a dual-fuel injection system, and the medium supply stability is improved.

Description

technical field [0001] The invention relates to the technical field of internal combustion engines, in particular to a dual-medium pressure accumulator with pressure bias adjustment function. Background technique [0002] Alternative fuels represented by alcohol ethers and natural gas have occupied a certain market in the domestic automobile consumption market. With the breakthrough of high-pressure direct injection technology, gasoline / diesel is used as auxiliary fuel, and alternative fuels such as methanol and natural gas are used as main combustion fuels. The dual-fuel vehicle ratio will be widely used because of its advantages of high efficiency, cleanliness and reliability. [0003] However, the current status quo is: In vehicles or systems driven by dual fuels, the usual injection methods are: both alternative fuels and traditional fuels are lower than the injection in the intake manifold, such as methanol gasoline dual-fuel vehicles; alternative fuel low-pressure inje...

AI Technical Summary

Problems solved by technology

[0005] At present, the pipelines used to transport fuel are laid directly, and the interface with the injector needs to be designed according to the product characteristics. The integration of the whole device is low, and the material cost and installation cost are high;

[0006] In addition, because the pressure difference between the two fuels is out of control, it is easy to cause the fuel to leak from each other, and there are problems such as poor lubricity of parts, inaccurate fuel injection volume, and poor fuel stability;

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