The FLY-3000 fuel consumption test device (hereinafter referred to as the FLY test device) uses the IRB-2100 non-dispersive infrared analysis platform to measure the exhaust concentration of gasoline or diesel vehicles, and uses a V with high accuracy, stability and durability. A cone-type (V-cone) flow meter measures the total flow after dilution, and then accurately calculates the carbon emissions based on the temperature, humidity, and pressure corrections to obtain the vehicle's fuel consumption.
FLY-3000 uses a fan with larger flow and wind pressure, which is suitable for the detection of large displacement models.
Figure 2 Gas flow chart of dilution unit
Measurement principle and structure of IRB-2100 non-spectral infrared method
Non-spectral infrared method uses certain asymmetric gas molecules, such as HC, CO 2 , and CO gases to have specific absorption peaks for infrared light of 3.4 μm, 4.3 μm, and 4.6 μm, respectively, and the absorption rate is between the concentration of the gas The relationship of 符合 is in accordance with Bill-Lambert's law, and the gas concentration can be calculated by measuring its absorption rate.
IRB-2100 infrared platform adopts the structure design of pulsed single light source, single gas cell and 4 units integrated thermopile infrared detector (built-in 4 kinds of infrared filters of HC, CO 2 , CO and reference); pulse The single light source replaces the traditional infrared light modulation mode of the cut-light motor, so there is no mechanical transmission, and the platform structure is more sturdy and miniaturized. The infrared detector has added parameters that do not generate infrared absorption for HC, CO 2 and CO Compared with filters and detection units, it can more effectively suppress common mode signal changes and make the performance of the platform more stable. The low-range calibration system is adopted to meet the measurement accuracy of low-concentration gas after dilution.
The absorption spectrum of HC, CO 2 and CO gas and the corresponding band-pass filter spectrum of the infrared filter are shown in Figure 5 and the block diagram of the IRB-2100 infrared platform is shown in Figure 6.
V cone flowmeter structure and characteristics
V-Cone flowmeter is a new type of differential pressure flowmeter developed in the differential pressure flowmeter represented by orifice plate, nozzle (critical Venturi tube), Venturi tube and uniform velocity tube. It also uses the throttling effect to measure the flow rate. Compared with other throttling fluids, it changes the throttling layout, from the traditional center hole throttling to the ring throttling. That is, the V-cone flowmeter uses first-class linear cones. Suspended in the center of the pipe, the fluid gradually shrinks to the inner wall of the pipe. This novel throttling effect makes it self-rectifying, self-cleaning, and self-protecting. From the actual use of a large number of sites, the measurement effect of the V-cone flowmeter is better than other differential pressure flowmeters.
Environmental conditions and power requirements
0 ~ 40 ℃;
10 ~ 90% RH;
70.0kPa ~ 110.0kPa;
380VAC ± 10% (three-phase)
1 Measurement range and indication error
0 ～ 4.000% vol
± 0.02% vol
0 ～ 1.000% vol
± 0.02% vol
0 ～ 500 × 10－6 vol
± 4 × 10－6 vol
2 Repeatability: not more than 1/3 of the indication error
3 interference error: not more than 1/2 of the indication error
4 Response time: <8s
Technical Specifications of Dilution Flow Unit
1 Flow measurement range: 0 ~ 30 m3 / min
2 Flow rate indication error: ± 1%
Fuel consumption measurement error: ± 4%
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