engine and body

Abstract

The invention discloses an engine and an engine body. The engine body comprises a cylinder body with multiple cylinder holes, a water distribution cavity is formed in the cylinder body, a water jacketis arranged in the side wall between two adjacent cylinder holes, and communicates with the water distribution hole, the bottom end face of the water jacket is provided with a protruding structure, the height of the protruding structure is smaller than the height of the water jacket by one half, a supporting beam is arranged in the water jacket, the two ends of the supporting beam are fixedly connected with the two side walls of the water jacket, the supporting beam can improve rigidity of the cylinder holes, deforming of the cylinder holes in the crankshaft axis direction can be restrained,and reliability is improved; the height of the protruding structure is reduced, the lower area of the water jacket is reduced, appearing of a dead water area is avoided, the flow speed is improved, the heat exchange coefficient is increased, in the casing production transport process, storage is easy, and the casting difficulty and the rejection rate are reduced; and on the basis of the structure,when the cylinder diameters are same, the cylinder centre distance of the engine is small, the whole length is small, and competitive power of a product is improved.

Description

technical field [0001] The invention relates to the technical field of auto parts, in particular to an engine body. The invention also relates to an engine comprising the above-mentioned airframe. Background technique [0002] In order to comply with increasingly stringent emission regulations and to meet the competitive advantage of low fuel consumption, engines are increasingly developing towards high explosion pressure. [0003] At present, the explosion pressure of newly developed medium-sized engines with Euro VI emission standards is above 20MPa, even reaching 25MPa. In order to meet the reliability of high explosion pressure engines, the relevant components also need to be strictly matched and designed. [0004] The cooling of the engine is an important link to ensure that the engine can work effectively. In the existing technology, for the models with dry cylinder liners, especially the light and medium models, most of them use protrusions between the cylinders for ...

AI Technical Summary

Problems solved by technology

[0005] However, in order to guide the upward flow of water as much as possible, the above-mentioned structure will inevitably make the height of the raised structure between the cylinders larger. This structure has the following disadvantages: first, it causes the lower part of the water jacket to become a "dead water area", the water flow is slow, and the water flow is wasted. The heat exchange becomes poor; the second is that during the production, storage and transportation of the water-jacketed sand core, the raised structure between the cylinders is too high, resulting in a weak sand core, poor rigidity of the sand core, and easy cracks or even breaks, which increases the scrap rate; , due to the convex structure in the middle, the axial force of the bolt is more easily transmitted to the upper part of the cylinder bore, increasing the deformation of the upper part of the cylinder bore

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