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Noise reducing structure of gasoline engine intake system

A gasoline engine and air intake system technology, applied in the direction of engine components, machines/engines, charging systems, etc., can solve problems such as unsatisfactory effects, and achieve the effect of simple structure, small performance impact, and strong noise reduction ability

Inactive Publication Date: 2010-08-18
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these measures are not ideal for reducing the "swish" whistling sound issued by the engine during rapid acceleration.

Method used

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  • Noise reducing structure of gasoline engine intake system
  • Noise reducing structure of gasoline engine intake system
  • Noise reducing structure of gasoline engine intake system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment one: see figure 1 , image 3 , Figure 4 The noise reduction structure of a gasoline engine air intake system shown in the figure has a main body of a diversion structure 7, which is a parallel half-tooth type, and is arranged behind the valve plate 2 of the gasoline engine intake system to the intake port. In the S area before the interface with the resonant cavity, the flow guide structure is formed separately, and it is set in the S area from behind the valve plate 2 of the gasoline engine intake system to before the interface between the air intake channel and the resonant cavity, and welded with the resonant cavity. Gas manifold 3 is fixedly connected.

Embodiment 2

[0028] Embodiment two: see figure 1 , Figure 5 , Figure 6 The noise reduction structure of a gasoline engine air intake system shown has another flow guide structure 7 as its main body. The flow guide structure is an independent plate type, and is integral with the intake manifold 3, and is formed by injection molding or casting.

Embodiment 3

[0029] Embodiment three: see figure 1 , Figure 7 The noise reduction structure of a gasoline engine air intake system shown in the figure has a main body of a flow guide structure 7, which is a full mesh structure, formed separately, and assembled on the throttle body after welding or integrating with a sealing ring 1 and intake manifold 3.

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Abstract

The invention discloses a noise reducing structure of a gasoline engine intake system, which is characterized in that the structure body is in a diversion structure, and the diversion structure is arranged in an S area after a valve plate of the gasoline engine intake system and before an interface between an inlet channel and a resonator cavity; and the gasoline engine intake system comprises a throttle body, an intake manifold connected with the throttle body, and a throttle body valve plate which is arranged in the channel between the throttle body and the intake manifold. The noise reducing structure of the gasoline engine intake system has the main advantages of simple structure, strong noise reducing capability and low cost, mostly reducing the 'swoosh' intake howling produced when an engine accelerates suddenly, clarifying the position and the optimal structure of the noise reducing and diversion structure through CAE analysis, conducting most refined optimization on a traditional intake system, and achieving higher noise reducing effect; and the diversion structure can be mostly directly integrated with the traditional intake system for design and production, and does not affect the performance, the assembly and the reliability of the engine.

Description

technical field [0001] The invention relates to a noise reduction structure of an intake system of a gasoline engine. Background technique [0002] The gasoline engine adjusts the air volume entering the cylinder by adjusting the throttle opening, and then controls the fuel injection volume through the electronic injection control system to control the output power of the engine. When the engine is running, due to the high-speed operation of the engine, the intake system is always in a negative pressure state; when the engine accelerates rapidly, with the rapid opening of the throttle body, the air will produce a "swish" whistle after entering the throttle The sound seriously affects the NVH performance of the engine. The root cause of this whistling sound of intake air is that when the opening of the throttle body is in the range of 5-25 degrees, there is a large pressure difference in the pipelines before and after the throttle body of the engine. The rapid opening of th...

Claims

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Application Information

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IPC IPC(8): F02M35/12F02M35/104
Inventor 郑伟张慧敏杨金才徐之勤蒋树辉张晓宇刘斌张军乔艳军
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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