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Internal combustion engine exhaust on-line measurement and diagnosis method and equipment

An internal combustion engine and exhaust gas technology, which is applied in the direction of internal combustion engine testing, measuring devices, instruments, etc., can solve the problems of complex structure, not easy operation, difficult to quickly measure the qualification of products, etc., and achieve the effect of improving speed and reliability.

Inactive Publication Date: 2012-05-09
胡建华 +3
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Problems solved by technology

[0007] Due to the complex structure, inconvenient operation, long test time, and frequent calibration of multiple reference points with standard gas to prevent test value drift, the above measurement method is currently difficult to apply to the rapid measurement and calibration of products on the production line. Judgment of whether the product is qualified or not

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  • Internal combustion engine exhaust on-line measurement and diagnosis method and equipment
  • Internal combustion engine exhaust on-line measurement and diagnosis method and equipment
  • Internal combustion engine exhaust on-line measurement and diagnosis method and equipment

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Embodiment Construction

[0032] In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, in conjunction with the accompanying drawings and preferred embodiments, the specific implementation methods, steps, The structure, characteristics and functions are described in detail.

[0033] see figure 1 Shown is a schematic diagram of the relationship between the air-fuel ratio of the combustible mixture of the internal combustion engine and carbon monoxide, hydrocarbons, and nitrogen oxides. (Excerpted from John B. Heywood: "Internal Combustion Engine Foundmentals", McGraw-Hill, 1988). When other input parameters remain constant, the air-fuel ratio of the combustible mixture of the internal combustion engine (the ratio of air mass to fuel mass, or expressed by the excess air coefficient λ) has a significant effect on the three main harmful components in the exhaust gas: carbon monoxide (CO), hydrocarbons (HC) and nitrogen oxides...

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Abstract

The invention relates to an internal combustion engine exhaust on-line measurement and diagnosis method and equipment. The internal combustion engine exhaust on-line measurement and diagnosis equipment comprises a measuring device, a processing controller and a display device, wherein the measuring device comprises an air fuel ratio sensor and an oxynitride sensor, the air fuel ratio sensor measures the air fuel ratio of a combustible gas mixture of an internal combustion engine, and the oxynitride sensor measures the concentration of the oxynitride in the exhaust of the internal combustion engine; the processing controller is in signal connection with the measuring device and can be used for storing an internal combustion engine discharge table or an internal combustion engine discharge mathematical model, and the processing controller receives the data of air fuel ratio of combustible gas mixture and concentration of the oxynitride in the internal combustion engine exhaust and judges the discharge state of the internal combustion engine according to the stored internal combustion engine discharge table or internal combustion engine discharge mathematical model; and the display device is in signal connection with the processing controller and displays the discharge state of the internal combustion engine. The method comprises a measurement step, a processing control step and a display step. The method and equipment provided by the invention can be used for rapidly measuring the concentration of a specific component in the internal combustion engine exhaust and judging whether the internal combustion engine exhaust meets the standards or not.

Description

technical field [0001] The invention relates to the measurement and diagnosis of the exhaust gas of an internal combustion engine, in particular to an online measurement and diagnosis method and equipment for the exhaust gas of an internal combustion engine for quickly measuring and judging the exhaust gas of an internal combustion engine in a production line. Background technique [0002] At present, the most commonly used test principles for the main emissions (carbon monoxide CO, hydrocarbons HC, nitrogen oxides NOx) of the known exhaust gas analyzers of internal combustion engines are mainly through several methods such as: non-dispersive infrared analysis principle (ND-IR) , Electrochemical principle, hydrogen flame ionization method (FID), chemiluminescence method (CLD), magnetic pressure method, etc., respectively test different types of gas components: [0003] Non-dispersive infrared absorption method: it can be used to analyze and test carbon monoxide CO and carbon...

Claims

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Application Information

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IPC IPC(8): G01N33/00G01N15/06G01M15/10
Inventor 胡建华徐卫红张勇蒋奕
Owner 胡建华
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