Surface-reformed exhaust gas guide assembly of VGS type turbo charger, and method of surface-reforming component member thereof

A technology of turbocharger and surface modification, which is applied in the direction of supporting elements of blades, engine elements, machines/engines, etc., and can solve problems such as difficulty in use and poor sliding properties at high temperatures

CN1526052AInactive Publication Date: 2004-09-01AKITA FINE BLANKING +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2004-09-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

A novel exhaust gas guide assembly with an improved high-temperature sliding wear resistance, oxidation resistance, high-temperature strength or the like for a VGS turbocharger is provided. The invention is characterized in that a surface modification is applied to a component member of the exhaust gas guide assembly (A), such as adjustable blades (1), a turbine frame (2), a blade adjusting mechanism (3), or the like.
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Description

technical field

[0001] The present invention relates to a turbocharger used in an automobile engine and the like, and particularly to constituent parts of an exhaust guide assembly incorporated therein. Background technique

[0002] As a supercharger used as a device for achieving high output and high performance of an automobile engine, a turbocharger is known. This is a turbocharger that uses the exhaust energy of the engine to drive the turbine, and the compressor is rotated by the output of the turbine. , so that the engine is in a state of supercharging higher than that of the naturally aspirated device. However, when the engine rotates at a low speed, the turbocharger will feel unsmooth before the high-efficiency rotation of the exhaust turbine due to the reduction of the exhaust flow rate, and it will take a period of time to be able to supercharge the turbocharger in one fell swoop. It is inevitable that the so-called turbo lag etc. In addition, there is a disadvan...

Examples

Embodiment Construction

[0089] The present invention will be described in detail below. In the following description, first, the exhaust guide assembly in the VGS type turbocharger according to the present invention will be described, and then the method for modifying the surface of the constituent parts (including sliding parts) of the exhaust guide assembly will be described. illustrate.

[0090] [1] Exhaust guide assembly

[0091] The exhaust guide assembly A is specially used to properly throttle the exhaust gas G to adjust the exhaust flow when the engine rotates at a low speed. An example of it is shown in FIG. 1 . A plurality of variable vanes 1 that substantially set the flow rate of the exhaust gas, a turbine frame 2 that supports the variable vanes 1 so that they can rotate freely, and a system that rotates the variable vanes 1 by a predetermined angle in order to properly adjust the flow rate of the exhaust gas G Variable mechanism3. Next, each component will be described.

[0092] Fir...