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Front shell of vehicle engine

A vehicle engine and front cover technology, applied in the direction of engine components, machines/engines, shells, etc., can solve the problems of large engine radiation noise, unreinforced, low elastic modulus, etc., to reduce local resonance and surface radiation noise, Improvement of local mode frequency and NVH performance improvement effect

Inactive Publication Date: 2011-07-13
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, due to the low elastic modulus and weak stiffness of engineering plastics, and the thin shell of the engine front cover, it is easy to cause structural noise, which is one of the main contributions of engine radiated noise
The existing design often has unreinforced planes in the structure, which has low stiffness and is easy to cause local resonance, resulting in large radiated noise during the normal operation of the engine

Method used

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  • Front shell of vehicle engine
  • Front shell of vehicle engine
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Embodiment Construction

[0009] The structure of the present invention is described in detail below in conjunction with accompanying drawing:

[0010] Such as figure 1 As shown, the front cover structure mainly includes the front cover 2 and inner and outer reinforcing ribs. There is a circular table top 8 on the top of the outer surface of the front cover 2, and the height of the circular table 8 on the basis of the front cover 2 is 4mm~6mm. Four arc-shaped outer ring reinforcement ribs 3, 5, 9, 13 and four arc-shaped inner ring reinforcement ribs 4, 6, 7, 10 are arranged on the circular table top 8, and eight ribs are formed on the top circular table top 8 Stable structure, the height of each rib is 4mm~6mm. The outermost ends of the outer ring reinforcement ribs 3, 5, and 9 are connected to the side wall 11 of the front cover 2, and the outer ring reinforcement ribs 3, 9, 13 and the inner ring reinforcement rib 6 have a width of 7 mm to 13 mm, and the combination forms an oval shape. The long ax...

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Abstract

The invention provides a front shell of a vehicle engine. A circular table board is additionally arranged on the top of the front shell and is provided with reinforcing ribs to form region segmentation, so that the rigidity of the circular table board is enhanced and noise radiation of the surface structure of the front shell is lowered. The reinforcing ribs consist of outer ring reinforcing ribs and inner ring reinforcing ribs, wherein the outer ring reinforcing ribs are connected with the side wall of the front shell; the outer ends of a part of reinforcing ribs are connected with a front shell installation point; and all reinforcing ribs are arranged in an elliptical shape and a letter 'A' shape which are mutually staggered. Due to reasonable arrangement of the reinforcing ribs, a small quantity of materials can be used, the stiffness of the front shell of the engine is enhanced, local modal frequency is improved, the local resonance and surface radiation noise are lowered, and appearance is improved.

Description

technical field [0001] The invention relates to the technical field of engines, and in particular relates to a vehicle engine front cover. technical background [0002] With the market's increasing requirements on the NVH level of the powertrain, the structural strength and NVH problems of the powertrain are particularly prominent due to the continuous increase of engine power and torque. Engineering plastics are widely used in thin shell parts because they are easy to form, such as the front cover of a vehicle engine. However, due to the low elastic modulus and weak stiffness of engineering plastics, and the thin shell of the engine front cover, it is easy to cause structural noise, which is one of the main contributions of engine radiated noise. The existing design often has unreinforced planes in the structure, which has low stiffness and is easy to cause local resonance, thereby generating large radiation noise during normal operation of the engine. Therefore, there is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F7/00
Inventor 任海军康黎云张磊艾晓玉
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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