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Equipment for obtaining exhaust gas samples from internal combustion engines

A technology of internal combustion engine and exhaust gas, applied in the direction of sampling, sampling device, engine test, etc., to achieve the effect of simple installation, cheap manufacture and operation, and reduced pressure loss

Active Publication Date: 2017-08-22
AVL EMISSION TEST SYST GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem underlying the present invention is therefore to develop a device that guarantees a representative sampling according to regulations by avoiding the formation of areas of poor exhaust gas mixing

Method used

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  • Equipment for obtaining exhaust gas samples from internal combustion engines
  • Equipment for obtaining exhaust gas samples from internal combustion engines

Examples

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Embodiment Construction

[0026] The device according to the invention for obtaining exhaust gas samples from an internal combustion engine of a diesel or gasoline engine comprises an exhaust gas inlet 10 through which an exhaust gas channel 12 is in fluid communication with an exhaust gas source 14 formed by the internal combustion engine of a vehicle.

[0027] The exhaust gas channel 12 has an end 16 with an outflow cross section 18 which opens concentrically in an air channel 20 . For this purpose, this air channel 20 has in its boundary wall 24 an opening 22 through which the exhaust gas channel 12 protrudes vertically into the air channel 20 . In order to open concentrically in the air channel 20 , the exhaust gas channel 12 has a deflection of 90°.

[0028] Upstream of the flow of the exhaust gas channel 12, the air channel 20 has an inlet 26, on which a first air filter 28, usually formed by three filters, is arranged, through which air can be sucked into the Inside the air channel 20. The def...

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Abstract

A system for taking exhaust gas samples from internal combustion engines includes an exhaust gas duct comprising an outflow cross section and an exhaust gas inlet. The exhaust gas duct communicates with an exhaust gas source via the exhaust gas inlet. An air duct takes in ambient air via a filter. The outflow cross section is concentric in the air duct. A mixing zone is arranged downstream of the outflow cross section. A dilution tunnel has an exhaust gas / air mixture flow therethrough. An annular orifice is arranged downstream of the outflow cross section in the dilution tunnel. A flow deflection device is arranged upstream of the annular orifice and downstream of the outflow cross section. The flow deflection device deflects the exhaust gas / air mixture so that it departs from a center axis of the dilution tunnel immediately downstream of the flow deflection device in an axially symmetrical manner.

Description

technical field [0001] The invention relates to a device for obtaining exhaust gas samples from an internal combustion engine, said device having an exhaust gas channel in fluid communication with an exhaust gas source via an exhaust gas inlet, in which an air channel through which ambient air can be drawn in through an air filter, arranged in the exhaust gas Mixing zone downstream of the outflow cross-section of the channel, dilution tunnel through which the exhaust gas-air mixture flows, wherein the outflow cross-section of the exhaust gas channel is arranged substantially concentrically with the air channel and downstream of the outflow cross-section of the exhaust gas channel in the dilution There is an annular baffle in the tunnel. Background technique [0002] Such devices are known, for example, from CVS devices (Constant Volume Sampling). In this device, exhaust gas is always mixed with air, so that a constant overall volume flow of the air-exhaust gas mixture resul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/22
CPCG01N1/2252G01N33/0018G01N2001/2255G01M15/102
Inventor A.迪科R.巴利克S.威利克
Owner AVL EMISSION TEST SYST GMBH
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