Discontinuous bamboo hat shape fuel oil spray forming device

Abstract

The invention is discontinuous bamboo-hat-type fuel oil atomization forming device, which mainly includes multi-aperture oil ejectors and the bumper at front of the ejector. The multi-aperture ejector is the traditional diesel ejectors, the ejecting aperture cone angle is 90-140degrees, the quantity of the ejecting apertures are 4-8. The bumper is a gyration body made up of top concave wall and the round desk side wall, the apex angle of the round desk side wall is 120-178degrees. The bumper is suspended on the subjacent surface of the diesel cylinder cover; the centre line of the bumper is overlapped with the centre of the ejecting cone of the multi-aperture ejecting devices. The fuel ejected from the apertures forms the cone atomization around the aperture; when the wall atomization leaves the round desk side wall, it penetrates to the external side of the bumper, finally forms a suspended atomization. The wall atomization and the suspending atomization have a large dispersing area along the circle direction.

Description

technical field [0001] The invention relates to a fuel spray forming device, in particular to a discontinuous hat-shaped fuel spray forming device for a diesel engine, and belongs to the technical field of power machinery engineering. Background technique [0002] Internal combustion engine, as the most important thermal machinery with the largest amount, the widest application, and the most incomparable, mainly includes diesel engine and gasoline engine. The diesel engine uses a porous injector to spray fuel into the cylinder to form 4 to 8 solid conical sprays. This spray has a dense and poorly atomized core part; because its spray cone angle is 10 degrees to 20 degrees, The distribution of fuel along the circumference of the combustion chamber is extremely uneven. Therefore, poor mixing of fuel and air restricts the improvement of diesel engine performance. In the prior art, Gianpietro E. Cossali et al. pointed out in the paper "Effect of Spray-Wall Interaction on Air E...

AI Technical Summary

Problems solved by technology

Its disadvantages are: when used in diesel engines, only small-diameter deep combustion chambers can be used; the wall-impeding sprays of adjacent injection holes are easy to interfere with each other; the wall-impacting sprays are easy to penetrate to the bottom wall of the combustion chamber or the bottom surface of the cylinder head

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