JP5262115B2 - Thermal mixture rectifier - Google Patents

Description

  The present invention relates to a thermal mixture rectifier, and more particularly to a thermal mixture rectifier that suppresses the generation of abnormal noise.

Abnormal noise is generated due to the turbulence of the air flow generated during intake of the internal combustion engine. In order to reduce such abnormal noise, an intake device for an internal combustion engine having an air rectifying member on the downstream side of the flow control valve has been proposed.
JP-A-11-141416

  In the intake noise reduction structure proposed here, as shown in the schematic cross-sectional view of FIG. 2, the net 1 is disposed downstream and in the vicinity of the slot valve 2 in order to reduce the noise downstream of the slot valve 2. When the passage wall 8 immediately downstream of the net 1 is made of resin, the direction of the intake air passing through the net 1 in a direction away from the inner surface 8a of the net 1 is set to flow immediately downstream of the net 1. When the wall 8 is made of metal, the eyes of the net 1 are directed to the intake air passing through the net toward the inner surface 8a of the passage wall.

  In other reference numerals, 3 is an intake manifold surge tank, 4 is a slot body, 5 is an intake manifold section, 6 is a surge tank, 8 is a passage wall, and A is an upstream side when the inner valve of the slot valve 2 is opened. The flow B flows through the gap between the falling portion and the passage wall 8, and B is the flow that flows through the gap between the portion falling down and the passage wall 8 when the inner valve of the slot valve 2 is opened.

  According to the embodiment of Patent Document 1, the structure of the air rectifying member installed on the downstream side of the flow control valve has a mesh shape, and rectifies the turbulence of the airflow generated in the gap passing through the valve. , Suppresses abnormal noise.

  However, such a structure is considered to have a problem that the wire mesh lattice is clogged due to adhesion of the blowback component from the engine side, leading to a reduction in intake performance.

  Abnormal noise occurs when turbulence occurs in the pipe. Turbulent flow has a wide range of frequency components, and air column resonance occurs due to frequency components that match the tube characteristics, resulting in abnormal noise.

  An object of the present invention is to provide a thermal mixture rectifier having a rectifying member that rectifies airflow turbulence in order to suppress abnormal noise caused by turbulent flow generated in a pipe.

An object of the present invention is to install a mesh-like rectifying plate made of only a conductive heat-generating material throughout the conductive heat- generating frame, and the conductive heat-generating frame is attached to the mounting jig via a heat insulating jig mounting member. It is achieved by a thermal mixture rectifier that is attached and used by energizing and heating the rectifying plate to 200 to 230 ° C. When this thermal mixture rectifier is used for rectification of the mixture, The thermal mixture is rectified while the energizing power generating mesh-like rectifying plate is energized and heated to 200 to 230 ° C.

  The thermal mixture rectifier according to the present invention comprises a combination of the principle of removing deposits by heat such as a thermal air flow meter and the rectifying action, and the rectification of the mixture and the component adhering to the rectifier It can be removed.

  That is, in the intake noise reduction structure described in Patent Document 1, the generation of noise is suppressed by rectifying the airflow, and only at the location where the component that forms turbulence is generated. Although the structure that arranges the rectifying plate made mesh-like is taken, the abnormal noise generated by the disturbance of the flow of the air-fuel mixture in the pipe is not able to identify the component that forms the turbulent flow only partly Based on the above, the entire frame body is formed of a mesh-like current plate.

Furthermore, when this intake noise reduction structure is used for airflow rectification, the rectification effect is reduced by clogging substances adhering to the mesh, and the generation of noise cannot be effectively reduced. In the air-fuel mixture rectifier, an energizing exothermic mesh rectifying plate made of only energizing exothermic material is placed throughout the energizing exothermic frame to generate energized heat and rectify the air flow while suppressing the accumulation of foreign matter. As such, this does not happen. That is, when turbulent flow occurs, air column resonance (abnormal noise) occurs in the pipe, but the rectifying plate of the present invention suppresses the turbulent flow and reduces the occurrence of abnormal noise.

Accumulation of foreign matter occurs because moisture, oil, etc. adhere to the metal surface and other components are adsorbed there, which is regarded as a drawback of the structure of the thermal mixture rectifier. However, in the present invention, the current-carrying rectifying member is heated to about 230 ° C., so that moisture, oil, etc., which are components of the air-fuel mixture adhering to the metal surface, are vaporized, and foreign matter accumulates there. It becomes difficult and not only increases the intake performance, but also reduces the noise generated with the deposit.

  The thermal mixture rectifier of the present invention that exhibits such an effect is used not only for automobiles such as intake manifold surge tanks, particularly for adsorption devices of internal combustion engines, but also for MEMS (micro electromechanical system) industrial applications. Since a resin member is used as the layer, etc., the pipe is vibrated by turbulent flow, and is effectively used as a countermeasure against the problem of generating abnormal noise.

FIG. 1 shows a plan view of one use mode of the thermal-air mixture rectifier according to the present invention. An energization exothermic mesh-shaped rectifying plate 12 made of only an energization exothermic material is disposed in the entire energization exothermic frame 11, and a heat insulating jig attachment member 13 is attached to the frame 11. The jig attachment member 13 is inserted into an insertion port provided in the attachment jig 14 and attached to a pipe or the like for assembly. Reference numeral 15 denotes a control unit. This thermal air-fuel mixture rectifier is installed in the middle of an air-fuel mixture pipe that generates abnormal noise caused by turbulent flow.

The energizing exothermic frame 11 is made of a metal such as a copper alloy, and the energizing exothermic mesh-like rectifying plate 12 disposed in the entire frame is made only of a metal wire such as a copper wire. The mesh of the rectifying plate 12 in a mesh shape has a structure in which the number of eyes per inch (2.54 cm) is about 16 to 30 in consideration of turbulent attenuation, and the opening area ratio is 60% or more. .

  By arranging such a mesh-like rectifying plate 12 in the middle of the pipe, rectification is performed smoothly. However, as the rectification time elapses, components in the mixed gas adhere to the mesh-like metal plate, and flow efficiency is improved. However, by heating the frame body 11 to the mesh-like rectifying plate 12 and heating to about 200 to 230 ° C., for example, the moisture, oil, etc., which are the components of the air-fuel mixture are vaporized, Prevent deposition of components on the current plate mesh. Alternatively, when the deposition cannot be ignored, the deposit is removed by energization heating without flowing the air-fuel mixture as necessary.

  Examples of the mixture rectified by such a thermal mixture rectifier include, for example, a mixture of gasoline and air in automobile applications, and a reaction system molecule gas and an inert carrier gas in MEMS applications. Or a mixed gas thereof.

It is a top view which shows the state which attached and attached the baffle plate of the thermal type air-fuel rectifier which concerns on this invention to an attachment jig. It is a schematic sectional drawing of the noise reduction structure of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Energizing exothermic frame 12 Energizing exothermic mesh-shaped rectifier 13 Heat insulation jig attachment member 14 Mounting jig

Claims (7)

A mesh-shaped rectifying plate made of only an energizing exothermic material is arranged throughout the energizing exothermic frame, and the energizing exothermic frame is attached to the mounting jig via the heat insulating jig mounting member, A thermal mixture rectifier used by heating to 200 to 230 ° C.   The thermal-air mixture rectifier according to claim 1, which is used for rectification of an air-fuel mixture.   The thermal mixture rectifier according to claim 1 or 2, wherein the mixture is a mixture of gasoline and air.   The thermal mixture rectifier according to claim 1 or 2, wherein the mixture is a mixture of a reaction system molecule gas and an inert carrier gas. Using the thermal air-fuel mixture rectifier according to claim 1 or 2, rectifying the air-fuel mixture while energizing and heating the energizing exothermic mesh rectifying plate to 200 to 230 ° C through the energizing exothermic frame. Thermal mixture rectification method.   6. The method according to claim 5, wherein the air-fuel mixture is a mixture of gasoline and air.   6. The thermal mixture rectification method according to claim 5, wherein the mixture is a mixture of a reaction system molecule gas and an inert carrier gas.

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