Soft fuel additive Atomium Aprohim™ "SDA (SDA)" is designed to restore and maintain the performance of diesel fuel systems, including Common Rail and "pump-injector" systems. The additive cleans (washes), lubricates, and protects injectors and fuel pumps from corrosion, maintaining their serviceability. Brings the cetane number of the fuel to optimal values.
PROTECTION OF FUEL EQUIPMENT
The main purpose of the SDA fuel additive is to maintain the rated performance of diesel fuel equipment, protect it from clogging elements of diesel injectors, high-pressure pump plungers, and valves. Contamination, corrosion, and wear of these elements due to insufficient lubrication can lead to various noticeable violations in the fuel supply.
This page describes the mechanism of the most frequent problems that occur with diesel fuel systems, as well as the symptoms that indicate the presence of these problems.
Modern diesel engines using common rail systems operate with extremely high fuel pressure, reaching up to two thousand atmospheres in some operating modes. However, in some systems, fuel injection is performed up to 7 times per cycle – 2 pre-injection, 2 main and 3 post-injection. This requires the nozzle to open to 250 times per second. All this makes the engine economical and eco-friendly but imposes high requirements on the quality of fuel. The slightest contamination leads to a violation of the calculated modes of operation of the fuel supply. In some cases, the use of an SDA additive can help to normalize the already disturbed operation of the fuel system. However, you need to remember-the additive composition is balanced in such a way as to have a soft, gradual effect that does not violate the normal processes of fuel supply and combustion. That is why when using it, you should not expect immediate effects of restoring the characteristics of aggregates. It is much better to use the additive as a preventive tool that does not allow problems to occur.
INJECTORS " POUR»
One of the main problems of the diesel fuel system is that the injectors lose their hydro-density, which is commonly referred to by the phrase "injectors pour". Loss of hydro-tightness means that now when the nozzle is closed, its needle does not fit tightly to the seat and fuel enters the cylinder. Diesel fuel in the ramp, even in idle mode, is under a pressure of at least 200 atmospheres. In such conditions, a small amount of contamination that distorts the needle, or a slight wear on the surface, is enough to allow fuel to enter the combustion chamber "without permission".
This flow of fuel can be expressed in the fact that when the engine is running, black smoke will go out of the exhaust pipe, and fuel consumption will increase. If this has started to happen and the nozzle has not yet suffered permanent mechanical damage, the SDA additive will help to correct the situation. With a long enough continuous use, the additive will gradually remove dirt. However, it is better to apply it in advance. This will ensure the cleaning of the needle and its seat, prevent corrosion, which will improve the fit, and therefore significantly reduce the likelihood of loss of water tightness.
THE NOZZLE " POURS IN THE OPPOSITE DIRECTION»
Diesel injectors are equipped with a special channel for removing fuel back to the fuel tank. During normal operation of the system, this return fuel line is used for pressure relief, which ensures the action of the hydraulic mechanisms of the nozzle.
If the work of the nozzle is complicated by contamination, there may be a situation that the needle is displaced not in time or not completely, it "wedges". In this case, the cylinder is fed an insufficient amount of fuel, and its excess is fed to the "return".
Another reason for increased fuel discharge may be incorrect operation of the valves. Their design depends on the design of a specific nozzle, but in General, the wrong fit of the locking element (for example, the ball in piezo crystal nozzles) to the seat increases the hit of fuel in the "return".
All these problems disrupt the normal fuel supply, the engine power decreases, and fuel consumption increases. The SDA additive can help solve the problem by gradually cleaning the needle and valves from contamination and improving their fit.
THE SPRAY NOZZLE IS BROKEN
When lifting the needle of the diesel nozzle, fuel is fed under high pressure into the nozzle, through which it enters the combustion chamber in the form of a certain shape of a torch, mixes with air and ignites. If the nozzle is dirty, the shape of the fuel flare is broken. This leads to incorrect and incomplete combustion of fuel, which ends in a drop in power, the appearance of smoke from the exhaust pipe.
The Atomium Aprohim™ SDA additive is able to clean the nozzle of the nozzle and normalize the spray with constant long-term use.
WEAR OF HIGH PRESSURE PUMP PLUNGERS
The high-pressure fuel pump is the most important unit of any diesel fuel system. Its main task is to create working pressure in the fuel ramp. This pressure can range from 200 atmospheres at idle to one and a half to two thousand atmospheres at high operating conditions. At the same time, the pressure level is extremely important in order for the injectors to supply the strictly necessary amount of fuel.
Pressure is created by the plunger. With the smallest wear of the precision plunger pair (the plunger itself and the sleeve), the fit is broken and the pump has to make more turns in order to bring the pressure to the nominal level, which means it happens later.
All this disrupts the fuel supply, the engine loses dynamics and power, and fuel consumption increases. Using the SDA additive can solve the problem with the pump at an early stage, which makes it possible not to repair the fuel pump plungers or replace the pump. The SDA additive contains a geo-modifier of friction "SUPROTEC", which is able to restore the surface of the plunger, to overgrow micro-adjusters. Constant cleaning and lubrication of the plunger pairs will keep the pump running and protect it from low-quality fuel.
PROBLEMS WITH THE FUEL PRESSURE REGULATOR
A pressure regulator is a valve that is installed in the fuel ramp of a diesel system. If the ramp pressure is higher than necessary, the regulator opens and releases some of the fuel back into the fuel tank. Correct operation of the pressure regulator is especially important when changing engine operating modes, such as reducing rpm.
If the valve is dirty, it triggers with a delay or allows insufficient fuel to pass through during opening. This leads to the fact that the pressure in the ramp exceeds the required for this mode of operation, which means that when opening the injectors, more fuel enters the cylinders than necessary. Excess fuel does not burn and is released through the exhaust system, forming black smoke. Unburned fuel reduces the service life of diesel particulate filters and catalysts and can lead to turbocharger failure.
The fuel pressure regulator can be cleaned using an SDA additive. With constant use, it will gradually clean the valve, remove deposits, and prevent corrosion.
DIFFICULTIES STARTING THE DIESEL ENGINE
One of the most common symptoms of problems in the engine is its difficult start. "It doesn't start well" - car owners complain when starting a diesel engine requires them to scroll the engine for a long time with the starter. The normal start time of a diesel engine is 2-3 seconds or even less. An engine with a problem can take up to 15 seconds before the fuel ignites normally.
There may be several reasons for a difficult start-up. Insufficient compression, poor fuel, crystallization of paraffin hydrocarbons in diesel fuel at low temperatures, malfunction of glow plugs, and so on. Only a full-fledged diagnostic at a service station can determine the exact cause.
One of the reasons for the difficult start-up may be a problem in the fuel system. Contamination of the injectors can lead to a loss of hydraulic density, which means that they pass excess fuel into the cylinders. An additional symptom of this problem is black smoke from the exhaust pipe. Another reason may be wearing of the fuel pump plungers. In this case, the pump needs more revolutions and more time to create working pressure in the system. The SDA fuel additive cannot guarantee that the diesel engine will start up normally when it is used. However, constant application of the additive can clean the injectors and restore the pump's plunger pairs and thus eliminate fuel system problems from the list of possible causes.
INCREASED EXHAUST SMOKE
"Diesel smokes" - this is how they describe a situation when black smoke is clearly visible in the exhaust of a diesel engine. This "smoke" consists of tiny particles of unburned fuel. This means that the balance of fuel and air in the mixture is disturbed.
If the diesel is turbocharged, the reason for the imbalance may be that the turbine does not supply enough air, while the fuel system is working correctly. However, more often the reason lies in the fuel system itself. Violations of the hydraulic density of the injectors, contamination of the pressure regulator in the ramp, deposits on the nozzle of the nozzle disrupt the fuel supply and lead to more fuel entering the combustion chambers than necessary.
Not burned fuel leads not only to the appearance of smoke and violates the environmental friendliness of the car. Fuel particles negatively affect the operation of fuel catalysts, particulate filters, fall on the blades of the compressor turbine All these devices fall into the risk zone, their resource is reduced, and the probability of failure increases with every kilometre passed on a Smoking and Smoking car. In addition, this leads to increased fuel consumption. Which is not surprising if it just goes down the chimney instead of burning.
If the process of contamination and wear of fuel equipment elements has not yet led to irreversible mechanical failures, the SDA additive can restore normal operation of the system. When used continuously for 3-7 thousand kilometres (depending on the degree of contamination), the additive will clean the valves and plungers, restore the fit surfaces, and ensure the operation of mechanisms in nominal parameters.
LOSS OF DIESEL POWER AND INCREASED CONSUMPTION OF DIESEL FUEL
One of the reasons for reducing the power of the diesel engine, reducing dynamics, increasing fuel consumption may be the state of the fuel system. Any violations in the fuel supply – insufficient or increased pressure in the ramp, incorrect spray, loss of hydraulic density in the injectors-will lead to a drop in the efficiency of the entire engine. An additional (but optional) symptom of the fact that the reasons for the drop in power is in the fuel system of the car - black smoke in the exhaust of the car.
Continuous use of the SDA additive can correct a significant number of potential problems in the fuel system. First, it will clean the mobile elements of the fuel equipment, which will improve their fit, get rid of "wedging". Secondly, the additive will restore the fitting surfaces in the precision pairs of high-pressure pump plungers, in the valves of injectors, ensure their constant lubrication and protection from corrosion.
All this can normalize the operation of the fuel system, restore high-quality injection and spraying, and as a result-the completeness of fuel combustion.
If the application of SDA has not led to positive changes over a significant run, you need to check the engine for other possible causes of power loss - a decrease in compression, as a result of General engine wear, turbocharger problems, violations in the engine oil system.
Uneven operation of the diesel engine, especially noticeable at idle, can be the result of a violation of the fuel supply to different cylinders. Incomplete or untimely combustion of fuel leads to a decrease in pressure on the piston and the engine loses power at one or more cycles of operation. This is usually due to contamination and wear of fuel injectors elements.
In this case, you can solve the problem using the SDA fuel additive. If you use it for each refuelling, it will gradually remove dirt in the nozzles, ensure proper needle mobility, and remove deposits in the nozzle holes. However, contamination of the injectors is not the only possibility of engine vibration. Another reason may be low-quality fuel. For example, with a cetane number lower than 37. This may cause the fuel to ignite unevenly. Such situations can be avoided with constant preventive use of SDA additive, since it contains cetane-correcting additives and is able to raise the cetane number of low-quality fuel by 1-1. 5 units.
Uneven operation of the diesel engine can also be the result of problems unrelated to the fuel system – the occurrence of rings in some cylinders, uneven compression reduction due to wear and so on. The use of a fuel additive will eliminate the fuel system from the causes of engine vibration and encourage the diagnosis of other components.
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