Air cleaner

A technology of air filter and air chamber, which is applied in the direction of combined air filter and muffler, combustion air/combustion-air treatment, machine/engine, etc. It can solve the problem that it is difficult to reduce the sound pressure level and cannot Reduce intake noise and other issues

Inactive Publication Date: 2018-03-09
TOYOTA BOSHOKU KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although a conventional air cleaner having a sound-absorbing member made of a porous material can reduce the sound pressure level of high-frequency components higher than 1 kHz, it is difficult for such an air cleaner to reduce the sound of low-frequency components of 1 kHz or lower. pressure level
That is, conventional air filters cannot effectively reduce intake noise

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] An air cleaner according to one embodiment will now be described.

[0017] figure 1 The air cleaner shown in is disposed in an intake passage of a vehicle-mounted internal combustion engine, and includes a first housing 10 having a cylindrical inlet 11 and a second housing 20 having a cylindrical outlet 21 .

[0018] Such as figure 1 and figure 2 As shown, the first housing 10 includes an upper opening 12 , a peripheral wall 13 surrounding the upper opening 12 , and a bottom wall 14 . An outwardly extending flange 15 is provided around the entire circumference of the upper opening 12 . The inlet 11 protrudes from the outer surface of the peripheral wall 13 . The first housing 10 is made of hard synthetic plastic.

[0019] Such as figure 1 As shown, the second housing 20 includes a lower opening 22 , a peripheral wall 23 surrounding the lower opening 22 , and a top wall 24 . An outwardly extending flange 25 is provided around the entire circumference of the lower...

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Abstract

An air cleaner has a first housing having an inlet and an upper opening, a second housing having an outlet and a lower opening, a filter element arranged between the upper opening of the first housingand the lower opening of the second housing. The first housing includes a looped wall, which protrudes from the inner surface thereof, and a vibrating body, which is made of a non-air permeable material and fixed to the upper end of the looped wall. Inside the first housing, an air chamber is defined by the inner surface of the bottom wall, the inner peripheral surface of the looped wall, and thelower surface of the vibrating body.

Description

technical field [0001] The present invention relates to an air cleaner for filtering the air supplied to an internal combustion engine. Background technique [0002] An air cleaner for an internal combustion engine includes a first housing having an inlet and an opening, a second housing having an outlet and an opening, and a filter element arranged between the opening of the first housing and the opening of the second housing. [0003] In the air cleaner described in Japanese Patent Laid-Open No. 2000-110682, a sound absorbing member made of a porous material such as foamed plastic is fixed to the inner surface of the first case. The sound-absorbing member reduces intake noise. [0004] The present inventors found that, in an air cleaner for an internal combustion engine, the sound pressure level of a low frequency component of 1 kHz or less is greater than that of a high frequency component above 1 kHz, and that the low frequency component is a main cause of noise. [00...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): F02M35/14
CPCF02M35/14F02M35/0209F02M35/02466F02M35/02475F02M35/084
Inventor木村龙介犬塚義则
OwnerTOYOTA BOSHOKU KK