SU1413491A1 - Apparatus for measuring fumes in exhaust of internal combustion engines - Google Patents

Abstract

This invention relates to devices for measuring the HAZARDOUND of exhaust gases of internal combustion engines. Del - improving the accuracy of measurements and the autonomy of the device. To solve this problem, the block of protection of the optics of the source 1 and light 2 receiver units is made in the form of an impeller 5, kinematically connected to a gas turbine 6, which absorbs atmospheric air into the enclosures of blocks 1 and 2. At the same time, In this way, the fan is directly dependent on the pressure of the exhaust gases on the walls of the exhaust pipe 3 and makes it possible to effectively protect the optics from contamination. 1 il. and

Description

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The invention relates to a measurement technique, in particular to optical devices for measuring the opacity of exhaust hectares: (s of internal combustion engines in established and transient modes, and can be used in engineering, energy, chemical and other industries, where there is a need to measure opacity (opacity) of the transported gas medium.

The aim of the invention is to improve the accuracy and autonomy in the operation of the device.

The drawing shows a functional block diagram of a device for measuring the opacity of the exhaust gases of internal combustion engines.

The device comprises a light source unit, a light receiver unit 2 located on the same optical axis, which are mounted on the exhaust pipe 3 of an internal combustion engine. Optics of blocks 1 and 2 are equipped with a block 4 for supplying air to them. The latter is made in the form of an impeller 5 installed in the pipe 3, kinematically connected with the compressor 6 located in the skin 7 of which the cavity communicates with the atmosphere and blocks 1 and 2 is rough 8. Unit 2 is electrically connected electronic unit 9.

A device for measuring the opacity of the exhaust gases of internal combustion engines works as follows.

The exhaust gases, the passage through the exhaust pipe 3 of the internal combustion engine, drives the impeller 5, which through rigid mechanical connection drives the compressor 6. The latter draws clean air from the atmosphere

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ferries and transports it through the tubes 8 to the blocks 1 and 2 of the source and the light receiver. The air entering the light source and receiver units creates a back pressure to the exhaust gases, building, and penetrating into them, thereby protecting the optics of these units from contamination.

At the same time, the back pressure is created close to the exhaust gas pressure on the walls of the exhaust pipe 3 due to the fact that with increasing pressure of the exhaust gases their velocity increases, which leads to an increase in the frequency of vras, impeller 5, and hence the compressor 6, which increases air leak the atmosphere.

At the same time, the light beam from the light source unit 1 enters the light receiver unit 2. The optical signal in unit 2 is converted into an electrical one, which in electronic unit 9 is converted with the subsequent indication into a corresponding amount of smoke.

Claims (1)

Invention Formula An apparatus for measuring the opacity of exhaust gases of internal combustion engines, comprising source and receiver units located on the same optical axis, as well as an air supply unit to these units, characterized in that, in order to improve accuracy and autonomy in operation, the air supply unit is made in the form of an impeller placed in the exhaust gas flow path, kinematically associated with a compressor located in a housing, the cavity of which is in communication with the atmosphere and the bodies of the light source and receiver units.