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Wide-range accurate-proportion dilution device

A diluter, a wide range of technology for a wide range of precision proportional diluters

Active Publication Date: 2014-06-18
CHENGDU VANTRON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once the dilution ratio exceeds the above range, the precise dilution ratio cannot be guaranteed

Method used

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  • Wide-range accurate-proportion dilution device
  • Wide-range accurate-proportion dilution device
  • Wide-range accurate-proportion dilution device

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Embodiment Construction

[0032] The present invention will be further described in detail below in conjunction with test examples and specific embodiments. However, it should not be understood that the scope of the above subject matter of the present invention is limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0033] Figure l shows the working principle of the engine exhaust gas diluter. When the diluter works normally, the first solenoid valve 101 and the solenoid valves 102 and 103 in the mass flow meter system are both closed, and the ball valve 104 is opened to the maximum position. This ball valve 104 can adopt automatic control, also can adopt manual control, once it is fully opened, it can hardly produce arbitrary direction resistance to fluid. Vehicle or engine exhaust enters the diluter through a sample gas inlet 105 and most of the sample gas exits the diluter through a bypass f...

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Abstract

The invention provides a wide-range accurate-proportion dilution device. The dilution device comprises a sample gas inlet for receiving a sample gas, a dilution gas inlet for controlling the flow and receiving a dilution gas, a first electromagnetic valve connected with the dilution gas inlet to control the dilution gas to go through the first electromagnetic valve, a ball valve connected with the sample gas inlet and the dilution gas inlet to control the sample gas and the dilution gas to go through the ball valve, a mass flow meter system connected with the outlet of the first electromagnetic valve and the inlet of a Venturi flow meter or pinhole flow meter to calibrate the mass flow meter system of the dilution device; the Venturi flow meter or pinhole flow meter for receiving the dilution gas and the sample gas to accurately measure the flow of the obtained mixed gas, a mixed gas flow outlet connected with the Venturi flow meter or pinhole flow meter and used for providing a uniformly-mixed mixed gas having an accurate dilution proportion for a measuring apparatus, and a flow control system connected to the Venturi flow meter or pinhole flow meter. A wide-range accurate dilution proportion is provided by calibrating the dilution device and adjusting through the flow control system.

Description

technical field [0001] This invention relates to the dilution of engine exhaust or other gases containing small particles. Background technique [0002] Engine exhaust typically contains a large amount of particulate matter. The U.S. Environmental Protection Agency defines the visible substances of engine exhaust as follows: high-temperature engine exhaust must be diluted to a temperature below 52°C before measurement, and then filter the exhaust with filter paper. The substances collected on the filter paper are visible from the engine. things. Under this definition, many different dilution systems have been developed and applied. [0003] One of these is the full-flow dilution system, which is used to dilute the entire vehicle engine exhaust. Such dilution systems are expensive, bulky, and limited by the maximum exhaust gas displacement of the engine, so the application of such diluters is limited. Partial flow dilution system is another kind of dilution system that ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/38
Inventor 魏强
Owner CHENGDU VANTRON TECH CO LTD