1, Principle
three-way catalyst works is: when the temperature of the automobile exhaust gas purifying apparatus through, the three-way catalyst will be enhanced CO.’S scavenger, and hydrocarbons NOx activity of three gases, which causes a certain degree of oxidation – reduction chemical reactions, wherein CO oxidation at high temperatures has become colorless, nontoxic carbon dioxide gas; oxidation of hydrocarbons into water (H20) and carbon dioxide at high temperature; NOx reduced to nitrogen and oxygen. Three kinds of harmful gases into harmless gases, to purify the automobile exhaust. # 8203;
2. Maintenance
Since the Chinese generally poor quality fuel, the fuel contains sulfur, phosphorus and antiknock agents used in the MMT manganese, these chemical with the composition of the exhaust gas discharged, will form a chemical complex in the inner surface of the oxygen sensor and a three-way catalyst after combustion. Further, due to poor driving habits of the driver, or long-term driving in congested road, the engine often in an incomplete combustion state, will be the formation of coke in the oxygen sensor and catalytic converters. In addition, many parts of the country the use of ethanol gasoline, gasoline that has a strong cleaning effect, the combustion chamber will not decompose but the cleaning fouling combustion, exhaust emissions so as also dirt deposited on the surface of the oxygen sensor and terpolymers within the catalytic converter. Because of many factors, such travel for a distance in the car, in addition to carbon deposition in the combustion chamber and the intake valve, the oxygen sensor will result in poisoning and catalytic converters fail, 
three-way catalyst and plugging EGR valve is blocked catching sediment and other failures, causing the engine is not working properly, resulting in increased fuel consumption, power loss and excessive exhaust and other issues.
a conventional engine is limited to regular maintenance basic maintenance lubrication system, intake and fuel supply system, but can not meet the full range of maintenance requirements of modern engine lubrication system, an intake system, fuel supply system and an exhaust system, in particular It is required emission control system maintenance. Therefore, even if the long-term normal vehicle maintenance, it is difficult to avoid the above problems.
For such failure, dimensionalMeasures taken to repair companies usually replace oxygen sensors and catalytic converters, but due to the replacement cost of the problem, disputes between businesses and their customers continue to repair. Particularly those not yet reached the useful life of the oxygen sensor and catalytic converter replacement, often the focus of disputes, many problems attributed to the customer even quality of the vehicle.
3, new technologies
In order to solve this makes automobile manufacturers, service companies, maintenance management and environmental protection departments headache and difficult to solve the problem, relevant research institutes for traditional maintenance of existing conventional engine defects, research design and development of a new set of routine engine maintenance methods and techniques – conventional engine-round maintenance of new technologies.
This new technology content is: when customers regular maintenance, in addition to replacement of oil and three filter maintenance projects, joined the cleaning maintenance of catalytic converters. Its technical features are: the “automobile emission control system inspection and maintenance program” and a conventional engine regular maintenance methods combine to make up the traditional engine regular maintenance methods can not meet the defects of modern engine maintenance requirements, will passively solve environmental engine appears emission control system is not working properly to prevent environmental problems into active engine emission control system appears the problem is not working properly.
Table 1 National Car Quality Inspection Center for testing power and economy test results before and after cleaning
No.
pilot project
The test results # 8203; # 8203; # 8203; # 8203; the first
cleaning
after washing
change rate # 8203; # 8203; # 8203; # 8203;
1
dynamic properties
maximum speed / (km / h)
177.0
179.3
1.30 percentage # 8203;
of the fourth speed from 30 km / h acceleration to 100 km / h
Time / s
20.42
20.07
-1.71 percentage # 8203; # 8203 ;
starting gear up to 100 km / h
time / s
13.70
13.12
-4.23 percentage # 8203; # 8203;
2
economic [123 ] with 5 speed constant fuel consumption / (L / 100 km)
90 km / h
5.64
5.58
-1.06 percentage
120 km / h
7.93 [123 ] 7.72
-2.65 percentage # 8203; # 8203; # 8203;
Note: [rate of change = (test results after washing – before cleaning test results) test results /] before washing times; 100 percentage identification
this new technology has been tested by national car quality supervision and inspection Center and the China Association of automobile repair industry. After cleaning vehicle catalytic curing, the vehicle performance, acceleration performance can be improved, fuel consumption decreased (Table 1), vehicle emissions also been significantly changed
Good (Table 2).
Table 2 National Center for Quality car emission test engine test results before and after washing (unit: g / km) 
Pollutants
HC
CO
NOX # 8203;
tris catalytic converters cleaning agent before
The first
0.110
1.673
0.359
The second
0.101
1.625
0.375 # 8203;
The average ME1
0.106
1.649
0.367 # 8203;
after addition of three-way catalyst detergent
the first
0.108
1.517
0.320
the second
0.103
1.480
0.354 # 8203;
The average ME2
0.106
1.498
0.337 # 8203;
purification rate: (ME1-ME2) / ME1times; 100 Percent
0 percentage [ 123] 9.2 percentage
8.2 percentage # 8203;
4 Notes
1, three yuan if there is mechanical damage, thermal sintering, mileage over 200,000 km, lead case of poisoning, not cleaning utility.
2. The cleaning midway during engine stall, the engine immediately disconnect the hose connected to the device, and close the flow valve. Restart the engine, in order to reconnect adjusted smooth idle.
3, to check whether the right mixture concentration, can ensure that the liquid in a mist suction inlet.
4, washed three yuanIt should be carried out after the washing section of the door gas, fuel injectors and the combustion chamber.
5, the cleaning process, the idling not be so high catalytic converters overheating.
6, the washing liquid do not drip on the vehicle paint.
7, workplace away from the fire, make fire safety measures.
5, evaluation results
1, the cleaning process pungent smell of hydrogen sulfide, sulfur dioxide and other gas discharge.
2, after washing oxynitride significantly lower emissions.
6, the cleaning effect
Three cleaning agent can clean the engine intake, combustion system, the exhaust system simultaneously. Strong, fast and efficient removal inlet, an oxygen sensor and the carbon combustion chamber gum, three-way catalyst attached to a chemical complex. Washing down the gum and coke chemical complex will sufficiently oxidized into the combustion exhaust gas. Achieve governance exhaust, the CO, HC, NOx purpose of significantly reduced.
7, conservation effect
After washing, vehicle exhaust CO, HC, NO was significantly reduced, especially dropped NO; to improve fuel atomization, improve combustion efficiency, [ 123] to reduce fuel consumption, the percentage of fuel saving 5-20; capacity to improve cold starting, reduced noise; improve the power performance, extend the life of the engine and the three-way catalyst, to give a normal vehicle maintenance.
suggestions or twice a year for one-way catalytic converter 2-3 ten thousand kilometers per split-free cleaning.