A variable inlet section oil-gas separator

Abstract

The invention discloses a variable inlet section oil-gas separator, which comprises a cyclone-type oil-gas separator main body, an intake pipe section with a guide groove, a cover plate of the intake pipe section, a slide plate, a reduction gear set, a stepping motor, and a cyclone-type oil-gas separator. The main body of the oil and gas separator includes an air outlet, a cylindrical section, a conical section and an oil outlet connected in sequence; the stepping motor is provided with a stepping motor gear; the reduction gear set includes an upper gear and a lower gear connected by a gear shaft, and a sliding plate The end of the rack is a section of rack, and the sliding piece is installed in the guide groove of the intake pipe section, and can slide in the intake pipe section along the guide groove. The end of the rack meshes with the upper gear, and the lower gear of the reduction gear group meshes with the gear of the stepping motor. According to the change of engine working conditions, the position of the sliding vane in the intake pipe section can be adjusted to control the airflow velocity to achieve the ideal separation effect. The invention has the characteristics of high separation efficiency and adaptation to the change of blow-by gas volume with working conditions.

Description

technical field [0001] The invention relates to a device for separating oil mist or solid particles in air flow, in particular to an oil-gas separator with variable inlet section. Background technique [0002] The increasingly stringent automobile emission regulations put forward higher requirements on the control of crankcase emissions. The current emission regulations stipulate that the gas escaped from the engine crankcase cannot be directly discharged into the atmosphere, but should be directed to the appropriate position of the intake system through the connecting pipe, and returned to the cylinder for re-combustion, that is, forced ventilation of the closed crankcase is adopted. However, the blow-by gas in the crankcase contains oil mist. If it is not treated effectively, the oil will adhere to the supercharger blades of the intake system, the wall of the intercooler, the wall of the intake valve, and the secret nozzle of the fuel injector along the way. Affect the wo...

AI Technical Summary

Problems solved by technology

The pressure loss of the labyrinth oil-gas separator is small, and the cost is low, but its structure is not compact, and it can only separate oil mist particles with a large particle size, and the separation efficiency is low

Although the cyclone oil-gas separator can separate smaller oil mist particles and obtain higher oil-gas separation efficiency, because it separates the oil droplets through the centrifugal force generated when the airflow rotates inside the separator, the overall separation efficiency is limited. The gas flow rate is seriously affected

Cyclone oil and gas separators for vehicles are usually structurally designed based on the corresponding blow-by gas volume under common working conditions, but this makes the separation effect of the separator poor at low blow-by gas volume, and the pressure loss is too high under high blow-by gas volume

The amount of blowby gas is not constant during the normal operation of the engine, so the above-mentioned inherent defects of the cyclone separator will restrict the best separation performance in the full range of engine operating conditions

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