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Method and device for adjusting housing part modality of combustion engine in changeable and dynamic mode

A technology of dynamic adjustment, internal combustion engine, applied in vibration suppression adjustment, non-rotation vibration suppression and other directions, can solve the problem of not being able to automatically adjust the modal mode shape and frequency of shell parts, and achieve a simple and compact structure, eliminate radiation noise, and improve performance. The effect of the low frequency noise cancelling effect

Inactive Publication Date: 2013-06-05
LUOYANG INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this device cannot solve the problem of noise radiation of the casing parts of the internal combustion engine, let alone automatically adjust the mode shape and frequency of the casing parts as the working conditions of the internal combustion engine change.

Method used

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  • Method and device for adjusting housing part modality of combustion engine in changeable and dynamic mode
  • Method and device for adjusting housing part modality of combustion engine in changeable and dynamic mode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Such as figure 1 Shown: a mode-variable adjustment device for casing parts of an internal combustion engine, including a casing part 1, an isolation membrane 2, an electric / magneto-rheological fluid two-way flow control valve 3, an electric / magneto-rheological fluid container 4, PLC controller 5, internal combustion engine speed sensor 6, electric field / magnetic field control mechanism 7 and rheological fluid chamber 8. The casing part 1 is a shell part or part of the internal combustion engine 9, which can be an oil pan, an exhaust manifold cover, an exhaust two-manifold cover, an intake muffler, and an exhaust muffler. The rheological fluid chamber 8 is formed by setting the isolation membrane 2 in the casing parts 1, and the isolation membrane 2 and part of the casing parts 1 form a relatively closed space, which can pass through the electric / magneto-rheological fluid chamber 8. The liquid two-way flow control valve injects electro / magneto-rheological fluid, and the...

Embodiment 2

[0024] Such as figure 2 As shown: it is based on the structure of Embodiment 1, the electric / magneto-rheological fluid two-way flow control valve 3, the electric / magneto-rheological fluid container 4 and the applied electric field / magnetic field control mechanism 7 adopt the magnetorheological fluid two-way A flow control valve, a magnetorheological fluid container and a magnetic field control mechanism, the magnetorheological fluid container is filled with magnetorheological fluid. The casing part 1 is an oil pan, which is a casing part that is easy to radiate noise from the internal combustion engine. Its working method is: when the rheological fluid enters the mold cavity 8, the PLC controller 5 issues instructions to the magnetic field control mechanism 7, and the rheological fluid in the mold cavity 8 becomes solid instantaneously by applying a magnetic field.

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Abstract

The invention discloses a method and device for adjusting housing part modality of a combustion engine in changeable and dynamic mode. A rheolytic liquid cavity is arranged on a housing part (1) of the combustion engine (9). According to change of rotation speed of the combustion engine, the quantity of the rheolytic liquid entering the rheolytic liquid cavity is adjusted automatically, the rheolytic liquid in the rheolytic liquid cavity becomes solid instantly by exerting current or a magnetic field, and modality frequency and a vibration mode of the housing part of the combustion engine are changed. By means of the method and device, according to the change of the rotation speed of the combustion engine, the quantity of the rheolytic liquid entering the rheolytic liquid cavity is adjusted automatically. By means of the characteristic that current rheolytic liquid becomes solid instantly, the modality frequency and the vibration mode of the housing part of the combustion engine are changed. By changing the modality frequency and the vibration mode of the housing part of the combustion engine, low-frequency dynamic silencing is achieved, a good low-frequency silencing effect is obtained, and radiation noise of the housing part in the combustion engine is effectively eliminated.

Description

technical field [0001] The invention relates to the technical field of modally variable adjustment of casing parts of an internal combustion engine, in particular to a dynamic adjustment method and device for modally variable casing parts of an internal combustion engine. Background technique [0002] With the improvement of people's living standards, people continue to put forward higher requirements on the comprehensive performance indicators of automobiles, such as people's comfort in driving, especially on the vibration and noise characteristics of automobiles. Car noise has become an important source of environmental pollution, which not only pollutes the riding environment of the occupants in the car, but also causes serious pollution to the surrounding environment where the car runs. Internal combustion engine noise is the largest noise source of automobiles. In the existing technology, the vibration and noise reduction performance of most parts depends on fixed struc...

Claims

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Application Information

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IPC IPC(8): F16F9/53
Inventor 赵海军田丽萍王国华王海霞常家东
Owner LUOYANG INST OF SCI & TECH
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