About the automobile exhaust analyzer

The automobile exhaust emission analyzer is an instrument that detects and analyzes the exhaust gas emitted by the automobile when the automobile engine is in normal operation, thereby judging whether the automobile engine is working properly and whether the harmful gas is out of the standard. It is an effective device for controlling the exhaust pollution of automobile exhaust. tool. The quality, performance, and popularization of the use of such instruments directly affect the efficiency and effectiveness of inspections of vehicles with excessive exhaust emissions, and it is related to the progress and effectiveness of urban air pollution management in China. Another important function that is often overlooked in automotive exhaust analyzers is the elimination of diagnostics during engine failure. Therefore, various types of users such as automobile manufacturers, government environmental protection agencies, transportation departments, public security traffic control departments, and vehicle maintenance companies all need instruments that can easily and accurately detect automobile exhaust emissions and meet government regulations. Now talk about several instruments on different principles of the market:

1. Electrochemical gas analysis equipment. This instrument can be used to measure O2, NO, SO2, etc. The detector is electrochemical and is consumable. Such detectors are compact, simple, inexpensive, and easy to replace, but the fly in the ointment is short life.

2. Hydrogen flame ionization apparatus. The main measure is HC. With the advantages of high accuracy and good linear relationship between output and number of carbon atoms, it is mostly used for high-precision measurement tests. Such instruments can be tested continuously for a long time, with fast response, high test accuracy, simple structure and easy maintenance, but the supporting price is expensive.

3. Non-dispersive infrared absorption instrumentation. This instrument has the advantages of simple structure, long life, high measurement accuracy, fast response, low operating cost, and easy operation. It can be used to analyze and test CO (carbon monoxide), CO2 (carbon dioxide), HC (hydrocarbon), NO (nitrogen oxides) ) The concentration of other gases, therefore, is widely used in the analysis of vehicle emission pollutant concentrations.

4. Chemiluminescence analysis instruments. The main analysis of the test NO / NOx and other components. With high sensitivity, fast response, good linearity and so on.

Throughout the above principles of the instrument, non-dispersive infrared absorption instrument with high accuracy and sensitivity, wide measurement range, fast response, good selectivity, stability and reliability, can achieve simultaneous measurement of multi-component gas, Ability to continuously analyze and automatically control. Therefore, at present, domestic auto/motorcycle production equipment used in the fields of down-line inspection, vehicle maintenance inspection, in-use vehicle pollution detection, automobile pollution detection and treatment, etc., mainly use small instruments that do not divide the principle of light and electrochemical principle.