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Asymmetric split turbine of turbocharger

A turbocharger, asymmetric technology, applied in the direction of machines/engines, mechanical equipment, engine components, etc., can solve the problems of complex control, high cost and poor reliability of variable cross-section turbochargers, and reduce exhaust emissions Back pressure, easy to upgrade and switch, good inheritance effect

Active Publication Date: 2011-06-22
康跃科技(山东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The problem to be solved by the present invention is to provide a low-cost, simple-structured asymmetrical split turbine for the variable-section turbocharger, which has the limitations of high cost, complicated control, and poor reliability. Use different cylinders of the engine to effectively provide the intake and exhaust pressure difference required by high-pressure cycle EGR, and provide higher engine efficiency on the basis of meeting higher emission requirements

Method used

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  • Asymmetric split turbine of turbocharger
  • Asymmetric split turbine of turbocharger
  • Asymmetric split turbine of turbocharger

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1, such as Figure 5 As shown, a turbocharger asymmetric split turbine includes an engine, the engine is provided with an engine exhaust pipe 14, a turbine casing 13 and a turbine rotor 11, and the turbine casing 13 is provided with a volute high-pressure flow passage 18 and a volute The A / R value of the low-pressure channel 17 of the casing and the high-pressure channel 18 of the volute is smaller than the A / R value of the low-pressure channel 17 of the volute, and the cross-sectional area of ​​the volute of the high-pressure channel 18 of the volute is smaller than that of the low-pressure channel 17 of the volute vortex cross-sectional area.

[0037] The front end of the volute high-pressure runner 18 is connected with the high-pressure exhaust manifold 15 of the engine exhaust pipe 14, and the front end of the volute low-pressure runner 17 is connected with the low-pressure exhaust manifold 16 of the engine exhaust pipe 14, as Figure 7 As shown, the high-t...

Embodiment 2

[0039] Example 2, such as Figure 6 As shown, a turbocharger asymmetric split turbine includes an engine, the engine is provided with an engine exhaust pipe 14, a turbine casing 13 and a turbine rotor 11, and the turbine casing 13 is provided with a volute high-pressure flow passage 18 and a volute The A / R value of the low-pressure channel 17 of the casing and the high-pressure channel 18 of the volute is smaller than the A / R value of the low-pressure channel 17 of the volute, and the cross-sectional area of ​​the volute of the high-pressure channel 18 of the volute is smaller than that of the low-pressure channel 17 of the volute vortex cross-sectional area.

[0040] The front end of the volute high-pressure runner 18 is connected to the high-pressure exhaust manifold 15 of the engine exhaust pipe 14, and the front end of the volute low-pressure runner 17 is connected to the low-pressure exhaust manifold 16 of the engine exhaust pipe 14, in order to ensure high-speed supercha...

Embodiment 3

[0044] Example 3, such as Figure 5 As shown, a turbocharger asymmetric split turbine includes an engine, the engine is provided with an engine exhaust pipe 14, a turbine casing 13 and a turbine rotor 11, and the turbine casing 13 is provided with a volute high-pressure flow passage 18 and a volute The A / R value of the low-pressure channel 17 of the casing and the high-pressure channel 18 of the volute is smaller than the A / R value of the low-pressure channel 17 of the volute, and the cross-sectional area of ​​the volute of the high-pressure channel 18 of the volute is smaller than that of the low-pressure channel 17 of the volute vortex cross-sectional area.

[0045] The front end of the volute high-pressure runner 18 is connected with the high-pressure exhaust manifold 15 of the engine exhaust pipe 14, and the front end of the volute low-pressure runner 17 is connected with the low-pressure exhaust manifold 16 of the engine exhaust pipe 14, as Figure 8 As shown, the high-t...

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Abstract

The invention discloses an asymmetric split turbine of a turbocharger, comprising an engine. The engine is provided with an exhaust tube of the engine, a turbine casing and a turbine rotor, wherein, the turbine casing is provided with a casing high pressure flow channel and a casing low pressure flow channel, the exhaust tube of the engine is provided with a high pressure exhaust manifold and a low pressure exhaust manifold, the high pressure exhaust manifold is connected with the casing high pressure flow channel, the low pressure exhaust manifold is connected with the casing low pressure flow channel, and the A / R value of the casing high pressure flow channel is less than that of the casing low pressure flow channel. By adopting the asymmetric split structure, the two flow channels of the turbine casing have different A / R values and are respectively connected with different exhaust pipelines of the engine, thus effectively lowering the exhaust back pressure of part of engine cylinders and reducing the influence of EGR operation process on the pressurizing unit. The asymmetric split turbine has good succession, simple structure, easy upgrade and switch of products, low cost and easy and fast realization of engineering.

Description

technical field [0001] The invention relates to an asymmetrical turbocharger, in particular to an asymmetrical turbocharger which adopts split turbines with different flow areas to change the exhaust back pressure of engine cylinders and finally realizes engine exhaust gas recirculation. It belongs to the field of internal combustion engines. Background technique [0002] After the engine adopts supercharging technology, the combustion of the engine is improved, the soot and hydrocarbons in the exhaust pollutants are greatly reduced, the power of the engine is continuously improved, and the volume and weight of the engine of the same power are reduced. More and more supercharging technologies is utilized in advanced engines. With the further increase of the engine power, the supercharging degree of the engine is also continuously increased, the heat load of the engine is further increased, and the exhaust temperature of the engine is increased. Supercharging technology pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02B37/00F01D25/24F02M25/07F02M26/05F02M26/16F02M26/23
CPCY02T10/121Y02T10/144Y02T10/12
Inventor 王航李延昭郭锡禄朱智富郭伦海郭晓伟
Owner 康跃科技(山东)有限公司
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