A method for producing an integral volute supercharged exhaust manifold

Abstract

The invention discloses a method for producing an integral volute pressurization exhaust manifold. The integral volute pressurization exhaust manifold comprises a supercharger turbo shell and an exhaust manifold. The supercharger turbo shell and the exhaust manifold are integrally cast. The integral volute pressurization exhaust manifold is made of an austenitic nodular cast iron QTANi35Si5Cr2 material. According to a product produced by the invention, the supercharger turbo shell and the exhaust manifold are designed into an integral cast; weights of parts are greatly reduced; simultaneously, a flow channel is smooth; and the normal exertion of engine power cannot be influenced by preventing a vortex from locally generated in a gap of combined surfaces in the gas flowing process.

Description

[0001] technical field [0002] The invention belongs to the technical field of auto parts, and in particular relates to a method for producing an integral volute supercharged exhaust manifold. Background technique [0003] With the continuous improvement and optimization of exhaust gas turbocharging technology, the continuous reduction of cost, coupled with the catalysis of energy-saving awareness and emission regulations, automobile exhaust emission regulations are more stringent. Reducing vehicle body weight, reducing fuel consumption, and improving automobile engine compression ratio are the key factors for automobiles. First question of design. Automotive engine supercharging technology is getting more and more attention because it can greatly increase power and torque without increasing engine displacement. Through the comparison of various supercharging methods, the exhaust gas turbocharging technology is widely used because it does not consume useful work. After...

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Problems solved by technology

After the engine adopts exhaust gas turbocharging technology, the maximum explosion pressure and average temperature will be greatly increased during work. In most current designs, the turbo shell and exhaust manifold of the turbocharger are two independent castings. It is large in size and heavy in weight, which does not meet the requirements of lightweight automobiles; in addition, the joint surface of the turbine shell and the exhaust manifold is threaded after processing, and the flow channel is not smooth, and the gap on the joint surface makes the gas locally generated during the flow process. The eddy current affects the normal performance of the engine power and increases the noise

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