converters unlimited device has ceramic honeycombs in its basis. Structurally, converters unlimited is a ceramic substrate made in the form of honeycombs, inserted into a metal housing and protected by heat-insulating materials. Small cells of a converters unlimited have a special coating or working composition.
The honeycomb composition is an alloy of platinum, rhodium and palladium, precious metals, the cost of which exceeds gold at least twice. The honeycomb structure of catalyst increases the contact area of toxic gases with neutralizing surface. Remains of harmful substances instantly burn out and do not enter in atmosphere.
The converters unlimited consists of the following parts:
- Housing with inlet and outlet nozzles;
- Ceramic block with porous structure;
- Catalytic layer, spraying on cells of a ceramic block;
- Sensor (lambda sensor) is a device that shows the pollution of gases after cleaning;
- Metal casing performs the function of thermal insulation and protects housing from mechanical damage.
converters unlimited circuit is installed after the exhaust pipe of an engine or in exhaust manifold. This arrangement is necessary for effective operation of a converters unlimited, since neutralization of toxic substances is possible only at high temperatures.
The operation of a node is as follows:
Exhaust gases are sent through the inlet to the inside and enter ceramic block, filling the cells. converters unlimited metals oxidize unburned hydrocarbons and carbon monoxide. Reducing metal, rhodium, neutralizes nitric oxide and turns it into a harmless substance. Pure gas is discharged into atmosphere through the outlet pipe.
It is important! The decisive role in the process of neutralizing toxic substances is played by the temperature. Conversion is possible at temperatures from 300 degrees, but basically the working temperature of a converters unlimited is in a range from 400 to 800 degrees.
At the time of engine warm-up,converters unlimited is inactive, and this is a significant drawback of models developed to date.
Difficulty in organizing correct operation of the unit is danger of its overheating. If you place converters unlimited closer to an engine, service life will decrease dramatically due to systematic overheating. Most car manufacturers place the part in an area of a right front wheel, where it is possible to maintain the temperature at optimum level.
Why buy?
Catalyst is one of the parts that continues to raise interest of consumers even at the end of a service life. There are more and more announcements about the purchase of automotive converters unlimited by numerous businessmen. The reason for this is the content of precious metals. Quantity of precious metals depends on a model and mass of the catalyst. Average indicators are as follows:
Silver – from 5.5 to 15 g;
Palladium – from 0.05 to 4.95 g;
Platinum – from 0.1 to 1 g.
Extraction of precious metals from old catalyst is a technologically complicated and disadvantageous process at home. This can only be done in large volumes using special equipment and reagents. In order to decide if the converters unlimited has to be removed and changed, pay attention to causes and symptoms of its failure.
- Working life
converters unlimited is good for approximately 150 thousand kilometers. During operation time, the part gradually burns out, and the worse the fuel, the faster it happens. The fact is that artificial additives in bad gasoline contribute to increased heating of fuel, and converters unlimited cells melt and clog.
It is important! The failure is also facilitated by microdamage that occurs when driving on bumps, malfunctions of piston group and ignition. Accelerating the honeycomb contamination process is an aggressive riding style.
-
Clogged honeycombs
A malfunction of a converters unlimited is detected by lambda sensor, and the error “CHECK ENGINE” pops up on a dashboard. At low efficiency of the converters unlimited due to clogging on the panel, error “P0420” may be displayed.
In addition, symptoms of component failure are:
- rattle and vibration under the bottom of a car. If a clang is heard during acceleration or relocation, it means that parts inside the catalyst body have crumbled.
- decreased engine dynamics. The car slowly accelerates. As if it was being held in the back. This suggests that the cells are partially clogged.
- temporary lack of traction at high speeds.
- difficulties with starting the engine. With a complete breakdown of aconverters unlimited, the car stalls immediately after starting.
- gray shade of exhaust with a pungent, suffocating odor is a sign, which indicates a significant destruction or melting of honeycombs.
- increased fuel consumption. This symptom is ambiguous and may indicate other problems. For example, gas mileage increases if fuel injectors are clogged.
All these signs indicate that the converters unlimited is still working, but cells are partially melted and their throughput is reduced. If you continue to operate the car in this situation, the engine may stop starting.
It is important! Ceramic particles of destroyed catalyst can get into cylinders, damage their walls and completely disable the engine.