Diesel engine cylinder block of sedan and casting method thereof

Abstract

The invention discloses a diesel engine cylinder block of a sedan and a casting method thereof. The diesel engine cylinder block of the sedan adopts vermicular cast iron materials; the thickness of the wall is 3mm, and the cylinder core distance is 86mm; the front end of the cylinder block is provided with an injection pump mounting flange and a gear chamber or a chain wheel chamber in the mannerof directly casting; the rear end of the cylinder block is provided with a gear box connecting flange and a cranking motor mounting flange in the manner of directly casting. The targets of light-weight design and high strength of the thin-wall are realized by adjusting the formula of a vermiculizer and controlling the smelting and pouring techniques; a water jacket sand core adopts an integral structure; the pouring manufacturability is favorable; the casting mode with a gadarene cylinder top is adopted to ensure the precision of water jacket casting; the casting mould of a full-cold core is adopted; the casting mould can be painted with high-temperature resistant coatings; a sand mould has high strength and rigidity and high precision; and the casting mould has little gas evolution, thusensuring the precision of thin-walled cylinder block castings and effectively reducing casting defects.

Description

technical field [0001] The invention relates to a diesel engine cylinder body and a casting method thereof, in particular to a car diesel engine cylinder body and a casting method thereof. Background technique [0002] In order to reduce fuel consumption and reduce carbon dioxide emissions, the lightweight of automobiles has become one of the focuses of attention. Lightweight is especially an effective way to improve vehicle fuel economy. Studies have shown that every 10% reduction in vehicle curb weight can increase fuel economy by 3%-5%, while reducing emissions by about 10%. At the same time, light weight can also improve the power performance of the vehicle, save materials and reduce costs. [0003] As the core component of an automobile, the engine has the largest volume and the heaviest weight among its components. It is the basic component that assembles the various mechanisms and systems of the engine into one. The lightweight design and development of the cylinder...

AI Technical Summary

Problems solved by technology

[0008] In addition, the traditional small diesel engine cylinder block casting method generally adopts the gravity pouring method at the cylinder level. Relatively speaking, the material density of the top of the cylinder block and the cylinder part is poor, and there are many casting defects, resulting in low yield and high manufacturing cost; at the same time With the continuous improvement of the specific power of diesel engines in cars, the strength requirements of castings are getting higher and higher. This traditional casting method is increasingly unable to meet the requirements of high strength.

In addition, traditional casting molds generally use hot cores, which cause large deformation, resulting in high energy consumption and relatively low production efficiency

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