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Wysłany: Wto 9:41, 11 Sty 2011
Temat postu: Smoke at free acceleration test vehicle automation
Smoke at free acceleration test vehicle automation and control system applications
Diagram with four smoke, marriage Automatic Measuring Control System (a) automatic smoke detection and control system for operating the above results can be seen that accuracy and stability of test data there are two main factors: First,
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, freedom and unity to accelerate the time to ask that the testing standards set forth in order to achieve \2 seconds range; second before the engine speed detection devices must be completely free of idle state. GB/T3846--93 under both the requirements of national standard, and the smoke meter works. Free Acceleration Smoke proposed automatic detection and control system technical conditions: 1. Simple structure, light,
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, machine total mass of 7kg or less (not including control system and console), small size, can quickly locate the installation and removal. Both installation and removal time of 5 seconds. 2. Measurement, given the work of the signal through the photoelectric switch after the automatic control system and smoke meter device control network linked through the network automatically complete the requirements of the various indicators of sampling all the work procedures 3. Clamping body can be manually adjusted, hold tight through the valve to achieve positioning. Body positioning, the free cylinder and the gas pedal to accelerate the work of \4. The work of the working stroke cylinder gas pedal, through the electromagnetic sensors can be properly adjusted. 5. The work of the cylinder pressure of time, through the discharge valve can be adjusted by computer in the display reflect this. 6. Control system can be programmed by computer control, the automatic measuring devices and smoke meter and network together as one, requiring a variety of programmable parameters. Automatic detection and control system shown in Figure 3. r1I1-1 ~ --- f a dynamic block in Figure 3 Schematic diagram of measurement and control system 7. Accuracy and life: Accuracy - time is not greater than 1 second; life - light solid mechanical parts, electrical components safe and reliable. 8. Automatic measuring devices used in pressure in the 0.3 ~ 05MPa, power supply 220V, 5OHz. 9. Automatic measuring devices work cycle procedures, shown in Figure 4. When the signal is given to the work, the work of the cylinder gas pedal must be 0. . . - 02 seconds in the end will press the accelerator pedal and keep to 4 seconds. Work must be able to recover immediately after the cylinder, to completely release the accelerator pedal,
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, 4 seconds from the start to be 16 seconds, then repeat the cycle a total of six cycles end. 1999 (3) Total 127 39 Light Vehicle speed information technology technical aspect deleted in Figure 4 the amount of spy-speed time s 【b) smoke measuring device for automatic application of research results based on the technical conditions in this paper, we study under the front of the \\(sets) has been into production. After more than 10,000 sets of tests, the effect is excellent, all the technical parameters of all meet the technical conditions and the corresponding national standard requirements. The application of the technology compared with the original testing of workers,
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, the dispersion of test results greatly reduced, the comparative data in Table 3. Table 3 Comparison of Artificial and automatic detection accuracy of the table side comparison testing smoke test the range of discrete values of Rb Rb workers】】 721.35. 601.191.43-0.26 ~ +0.26 automatically 1. ∞ 1.50】 491.491.5O see from Table 3, the original manual method of testing the impact of the results of large dispersion in a 0.26 to a 0.26Rb, and the dispersion of test results automatically in a 0. 03 ~ +0.03 Rb, there is considerable difference between the two, than manually operated automatic detection accuracy is increased by nearly 1o times. Fourth, the significance and impact of 1 + the detection technology research and application, as the engine into the (row) gas system and combustion system improvements, can provide accurate emissions data. 2. Eliminate the human factor,
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, improve accuracy, the dispersion of a manual operation from the original ten 0 +26 RB 0.26 increased to automatically detect a 0.06 ~ +0 +06 Rb (Table 3), increased nearly 10 times . 3. Able to effectively control the scientific and smoke emission vehicle quality and emission levels. 4. Increase the plant's technology and equipment level, reducing the difference caused by detection of rework, thereby increasing work efficiency. 5. The results for the production, is the first in with a great promotional value. If the car manufacturer and the country set up local traffic management vehicle inspection station (that) and so on. 6. Great social benefits and long-term economic benefits. This technical improvement has urgent practical significance.
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