Fuel-air mixer

Abstract

The invention relates to a fuel-air mixer. An overflow seat is fixed at the upper end of a fuel seat in a sealing manner; a mixing seat is fixed at the lower end of the fuel seat in a sealing manner; the overflow seat, the fuel seat and the mixing seat are provided inner cavities that are communicated mutually; an overflow quick joint is fixed on the overflow seat; a pressure overflow valve is fixed in the inner cavity of the overflow seat; the pressure overflow valve is communicated with the overflow quick joint in a sealing manner; a fuel quick joint communicated with the inner cavity of the fuel seat is fixed on the fuel seat in a sealing manner; a compressed air quick joint and a mixing quick joint that are communicated with the inner cavity of the mixing seat are fixed on the mixing seat in a sealing manner; a fuel injection metering device is fixed between the fuel seat and the mixing seat in a sealing manner and communicated with the inner cavities of the fuel seat and the mixing seat. The mixer is simple in structure, low in cost and long in service life.

Description

technical field [0001] The invention belongs to an oil-gas mixer, in particular to an oil-gas mixer for a post-treatment regeneration system of a diesel engine. Background technique [0002] In order to reduce the particulate matter emitted by the diesel engine exhaust, the diesel engine can be equipped with an exhaust particulate filter. The regeneration of the particle trap needs to be oxidized by a combustion accelerant. Most of the existing technologies provide atomized fuel through the post-injection of the fuel injector. It needs to rely on the engine ECU to control the electronically controlled fuel injector for multiple injections, which is difficult to achieve. Poor adaptability, only applicable to high-pressure common rail system; the R&D and manufacturing of fuel injectors capable of multiple injections are controlled by foreign suppliers, and the application cost is high and the application is limited; fuel injectors perform post-injection to calibrate the whole ...

AI Technical Summary

Problems solved by technology

The regeneration of the particle trap needs to be oxidized by a combustion accelerant. Most of the existing technologies provide atomized fuel through the post-injection of the fuel injector. It needs to rely on the engine ECU to control the electronically controlled fuel injector for multiple injections, which is difficult to achieve. Poor adaptability, only applicable to high-pressure common rail system; the R&D and manufacturing of fuel injectors capable of multiple injections are controlled by foreign suppliers, and the application cost is high and the application is limited; fuel injectors perform post-injection to calibrate the whole vehicle The difficulty increases, the cycle increases and it is easy to reduce the comfort of the vehicle

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