catalytic converters, is installed in the vehicle exhaust system, the most important machine outside the cleaning device, it can be discharged from automobile exhaust CO, HC and NOx and other harmful gases by oxidation and reduction of carbon dioxide into harmless , water and nitrogen. When the hot exhaust through the purification device, catalytic converters will increase in the scavenger CO,
air force one high, HC and NOx activity of three gases, led to some of its oxidation - reduction reaction, which is oxidized to CO at high temperature colored , non-toxic carbon dioxide gas; HC compounds in high temperature oxidation of water (H20) and carbon dioxide; NOx reduction into nitrogen and oxygen. Three types of harmful gases into harmless gases, the exhaust will be purified.
directory
Introduction to Visual inspection works back pressure vacuum test test test performance characteristics of other methods of heating catalytic converters to use profile is installed in the vehicle exhaust system, clean the outside of the most important device, it can be discharged from automobile exhaust CO, HC and NOx catalytic converters and other
by oxidation and reduction of harmful gases into harmless carbon dioxide effect, water and nitrogen. Because of this catalyst can also be the main type of work in the exhaust into harmless substances harmful substances, so called ternary. Work TWC works is this: When high-temperature automotive exhaust gas through the purification device, catalytic converters will increase in the scavenger CO, HC and NOx activity of three gases, led to some of its oxidation - reduction chemical reaction, which is oxidized to CO at high temperature colored, non-toxic carbon dioxide gas; HC compounds in high temperature oxidation of water (H20) and carbon dioxide; NOx reduction into nitrogen and oxygen. Three types of harmful gases into harmless gases, the exhaust will be purified. Detection of catalytic converter visual inspection checks whether the vehicle damage and whether overheating. After raising the vehicle to observe the surface of catalytic converters catalytic converters have
depression, if any, obvious dents and scratches, then the carrier of catalytic converter may be damaged. Observed on the catalytic converter is a serious case faded spots or slightly into the blue and purple traces of catalytic converter shield in the center is a very obvious dark gray spots, if it indicates overheating of catalytic converter had been the state of , need further examination. Percussion and shaking his fist catalytic converter, if you hear a sound object moving, then crushing its internal catalyst, need to replace the catalytic converter. To check the catalytic converter at the same time whether there are cracks, the connection is solid, all types of catheter for leaks, if any, should be dealt with promptly. This method is simple and effective, can quickly check the catalytic converter of mechanical failure. Peeling off the damaged catalyst, oil gathering, easily blocking the channel vector, the flow resistance increases, this time by measuring the pressure loss to be checked. Catalytic converter back pressure test in the appropriate place in front exhaust pipe to hit a hole, then a pressure gauge, start the engine, at idle, and 2500r/min, respectively, measured exhaust back pressure, if not more than the engine exhaust back pressure limits specified, then the catalyst is not blocked. If the engine exhaust back pressure exceeds prescribed limits, it would take the catalytic converter back exhaust system removed, repeat the above test, if the catalytic converter block, the engine exhaust back pressure will exceed the limit specified value. If the exhaust back pressure drop, then the muffler or catalytic converter downstream of the exhaust system problems, broken catalyst remaining in the downstream exhaust system, so visual inspection confirmed that the first complete catalyst is necessary. The exhaust pipe of a problem, muffler and catalytic converter can also be measured to determine pressure loss before and after. Vacuum gauge vacuum test will be received into the manifold, start the engine, it gradually increased from idle 2500r/min, observed changes in the vacuum table, vacuum if the time down, will remain the same engine speed 2500r/min and After reading the vacuum decreased, then the catalytic converter has blocked. Because the catalytic converter block in a vacuum test is a gradual process, and this test is a steady-state process (2500r/min), vacuum readings will not produce significantly reduced. If it is conducted in a laboratory before and after the catalytic converter block comparison check, after the catalytic converter block, intake manifold vacuum will occur significantly decreased, if the intake manifold vacuum dropped, and can not fully explain the catalytic converter is obstruction caused by the device. Reduced when the engine oil, intake manifold vacuum will fall. Therefore, compared with the vacuum test, exhaust back pressure test to better reflect the real situation of catalytic converters. Above method can only check catalytic converter mechanical failure, good or bad performance of catalytic converters, that is, its conversion efficiency is, you need to check to determine the following. Heating catalytic converter in normal operation, due to oxidation generated a lot of reaction heat,
air force one low nike, it can be judged by comparing the temperature difference between the performance is good or bad catalytic converter. Start the engine and warm to normal operating temperature, will remain at 2500r/min engine speed around the vehicle lift, with the digital thermometer (contact or non-contact infrared laser thermometer) to measure the import and export of catalytic converter temperature to be as close to the catalytic converter (50mm inside). Catalytic converter outlet temperature higher than the inlet temperature should be at least 10 to 15%, most of the normal work of the catalytic converter, the catalytic converter outlet temperature higher than the inlet temperature of 20 to 25%. If the vehicle before the main catalytic converter has also installed a vice catalytic converter, the main catalytic converter outlet temperature should be higher than the inlet temperature of 15 to 20%, if the outlet temperature is lower than the above range, the catalytic converter is not working properly, to be replaced; if the outlet temperature exceeds the above range, then the exhaust gas contains unusually high concentrations of CO and HC,
air force one low, to be on the engine itself for further examination. Other methods by comparing vehicle emissions to determine the efficiency of catalytic converters is unscientific. Because emissions from vehicles with the system good or bad working conditions related to the error can not be ruled out many factors. Such as the use of hot and cold idle to check the exhaust concentration conversion efficiency of catalytic converters is not very accurate method. Car engine is cold, cold as the cylinder wall, incomplete combustion and produce large amounts of CO and HC, while the hot car engine idling, due to improved combustion conditions, the engine has been in a state of closed-loop control, without the role of catalytic converters, exhaust gas concentrations will be greatly reduced. Therefore, this check can not guarantee that only for the conversion efficiency of catalytic converters, poor comparability. Features three-way catalytic performance is stable, reliable, long life, and its products are widely applied to Honda, Odyssey, Buick, Audi, Passat, Santana, Hyundai, Buick,
air force 1 shoes, Alto, Changhe, Jetta, etc. models. Contract other stainless steel products, filters, cabinet and other processing industries. TWC is a carrier of porous ceramic materials, components, install them in a special exhaust pipe. Said it is the carrier, because it itself does not participate in catalytic reaction, but covered with a layer of platinum, rhodium, palladium and other precious metals. It can exhaust HC, CO into water and CO2, while the Nox broken down into nitrogen and oxygen. HC, CO is a poisonous gas, excessive inhalation can cause death, and NOX will directly lead to the occurrence of photochemical smog. After the study shows that catalytic converters to reduce these emissions is the most effective method. Through oxidation and reduction reactions, carbon monoxide is oxidized into carbon dioxide, hydrocarbons are oxidized into water and carbon dioxide, nitrogen oxides into nitrogen and oxygen is reduced. All three types of harmful gases into harmless gases. Three-Way Catalyst minimum time to react to 350 degrees Celsius, the temperature is too low, the conversion efficiency decreased sharply; and the activity of the catalyst temperature (optimal temperature) is about 400 ℃ to 800 ℃,
nike air force 1 high, was too high to make the catalyst aging intensified. In an ideal air-fuel ratio (14.7: 1), the catalytic conversion of the results would be the best. Use of catalytic converters clean the fuel injector cleaning measures to be taken: 1. Turn off the engine, the ignition switch is turned to the OFF file location. 2. Disconnect the fuel pump Insurance (relay or remove the pump from the tank circuit at the plug) 3. Remove the vehicle injector for return lines, according to models installed in the supply and return pipe of the corresponding fast connections, and with washing machine connected, (return pipe can be used to install blind blocking,) 4. will triple cleaning agent (1004 oil repair agent) against 1000 ml bottle by a ratio of adding clean oil box. 5. connected to power, the red lead car battery positive, black negative battery connected car. 6. Regulator: The regulator set at low pressure, rotating at the highest value of the timer, open the washing machine power switch, according to the construction of the car's electric fuel pump to adjust the working pressure cleaning machine. 7. Check: Check whether all the connectors are plugged in, to ensure that no leakage phenomenon. 8. Cleaning: Start the engine and start cleaning, cleaning after use, the engine will automatically fire, (when the engine is an alarm that will stop cleaning, can stop or choose to continue under the circumstances, such as the timer will continue to high spin value) in the cleaning process, such as abnormal,
nike air force one, immediately turn off the washing machine power switch, as amended, continues to work. 9. After cleaning, disconnect the power switch cleaning equipment, cleaning equipment and vehicles apart the pipe connections and restore the vehicle's original fuel lines and electrical systems. 10. Start the engine, check for leaks, and all normal cleaning is completed. Description: Vehicle cleaning process, there will be unpleasant exhaust emission, engine shake, are normal. Washer fluid is exhausted, the engine will be part of the coke to be softened, to be owners of high-speed 20-50 km, will be fully discharged. Atlas Atlas entry for more extended reading: 1
China Automotive Technology Forum
2
http://www.55usedcar.net/CollectionD...?id=126&menu=7
3
Guangzhou Car Net
4
http://www.020rental.com/cheliangzhishi.htm
Open Category: cars, equipment, machines, the term I have to perfect the
Jourdan Dunn Is The New Naomi Campbell
Linear Mode
