Noise reduction air passage, engine and operation machine

An engine and noise reduction technology, which is applied to engine components, machines/engines, mechanical equipment, etc., can solve the problems of large engine noise reduction structure, large noise reduction effect, and large layout space occupation, so as to save layout space. , The effect of low processing cost and flexible setting position

Pending Publication Date: 2022-02-25
湖南道依茨动力有限公司
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Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the prior art that the engine noise reduction structure has a large volume, takes up a large layout space, is high in cost, and has a limited noise reduction effect, thereby providing an engine with a good noise reduction effect. , Noise-reducing air duct, engine and operating machinery that do not take up layout space and are low in cost

Method used

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  • Noise reduction air passage, engine and operation machine
  • Noise reduction air passage, engine and operation machine
  • Noise reduction air passage, engine and operation machine

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Embodiment Construction

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must hav...

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Abstract

The invention belongs to the related technical field of operation machinery, and aims to provide a noise reduction air passage, an engine and operation machine which are good in noise reduction effect, do not occupy arrangement space and are low in cost. The noise reduction air passage comprises an air inlet passage and / or an air outlet passage, and noise reduction structures corresponding to at least one noise frequency are formed in the inner walls of the air inlet passage and the air outlet passage. An existing engine noise reduction structure is externally arranged on an external pipeline of an engine, as a result, the size of the engine noise reduction structure is large, the occupied arrangement space of the engine noise reduction structure is large, the cost of the engine noise reduction structure is high, and the noise reduction effect of the engine noise reduction structure is greatly limited. With the Noise reduction air passage adopted, the above problems can be solved.

Description

technical field [0001] The invention relates to the related technical field of working machines, in particular to a noise reduction air passage, an engine and a working machine. Background technique [0002] Engine noise is one of the main sources of vehicle noise, which will adversely affect the comfort of the vehicle. In particular, the diesel engine adopts the compression ignition method, and its explosion pressure is significantly higher than that of the gasoline engine. Engine noise tends to be more pronounced than gasoline engines. Therefore, engine noise reduction is the key to the vehicle's pass-by noise index, and it is also an important measure to improve the comfort of the vehicle. [0003] At present, the noise reduction measures for the engine are mainly to arrange a large resonant cavity muffler on its external intake and exhaust pipes. Since the resonant cavity of such a muffler is usually large in volume, it is mainly used to eliminate noise in the middle an...

Claims

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Application Information

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IPC IPC(8): F02M35/12F02M35/104F01N1/02F01N13/10
CPCF02M35/1266F02M35/104F01N1/02F01N13/10
Inventor 刘敏张咏琳钱凯
Owner 湖南道依茨动力有限公司
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