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Automotive coke and fuel additives
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| Release time：2014.04.28 News source：Yuhuan TRV Throttle Body Co.,ltd,Throttle Body,Throttle Valve Browsing number： |
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Is the most fuel-efficient vehicle owners care topics, and more fuel-efficient products on the market is dazzling. Currently fuel-efficient products on the market can be divided into additive, fuel economy, fuel economy stickers categories. Many additives, packaging products and fuel economy marked "fuel rate of 5% to 30%", but these products really can save so much oil, and some owners have skeptical. Carbon can be divided valves, combustion chamber deposits and two carbon intake manifold.
According Kero Throttle Bod informed, valves, combustion chamber deposits controlled by the decision EFI engine characteristics, when each work is the first cylinder fuel injection re-ignition, the moment when we turn off the engine ignition is cut off immediately, but The duty cycle of the ejected gas can not be recovered, only attached to the intake valve and combustion chamber walls, gasoline is likely to be volatile, but gasoline wax and varnish, but stayed long run gasoline wax and varnish piled thick, hardened after repeated heating to form a coke. Poor if the engine burning oil or petrol filling mass impurities, then the valve is more serious and the formation of coke and faster. As the carbon structure similar to a sponge, when the valve after the formation of carbon injected into each cylinder of fuel will have a part to be adsorbed, so that the true concentration of the mixture into the cylinder thinning, resulting in poor engine, there difficulty in starting, idling is not steady, poor acceleration, emergency refueling temper, excessive exhaust, fuel consumption increases and other anomalies. If we can cause severe valve closed lax, so there is no reason a cylinder and cylinder pressure does not work completely, even blocking valve so as not to return. At this point the valve and piston movement will produce interference, and ultimately damage the engine.
Carbon as a result of the intake pipe of the entire engine pistons are not synchronized, when the engine is off, some of the intake valve of the cylinder can not be completely closed, some of the continuous evaporation of unburned fuel oxidation, especially in the intake manifold throttle Rear produce some softer carbon black. On the one hand the carbon wall of the intake pipe will be roughened, the intake of these vortices cause rough areas, affecting the quality of the air intake and the effect of the mixture. On the other hand, these carbon will clog the idle channel idle speed control device makes catching or exceeds its adjustment range, so that will cause low idle, idle shaking speed of various accessory devices are malfunctioning, closing off the car oil, exhaust exceeded, charges oil phenomenon.
If you are experiencing slow speed while driving, emergency refueling tempered, cold start problems phenomenon, your car is likely to have coke the valve. Found idling car idling low and trembling, when the throttle card, change the battery without idling, then your car's intake manifold has coke very serious. With the above phenomenon should go to a professional repair shop check the car up. In the automotive repair diagnostics for carbon intake pipe is very simple, just remove the throttle can clearly see the extent of the carbon.
But for the diagnosis of valve coke has always been a problem, in general, in the professional repair shop, there are three diagnostic methods.
1, the disintegration of the law is the engine apart, check for coke production. This is very straightforward, but time-consuming, and no matter what the parts are more or less every time dismantling affect its performance and shorten its life.
2, endoscopy or nozzle to remove the spark plug, use an endoscope to observe the extent of the valve coke. This method is very convenient, but the cost of the endoscope is no trivial matter, and its usefulness in the maintenance is not very wide, so not all of the maintenance companies are equipped with the device.
3, the feedback voltage changes observed with diagnostic computer to read the oxygen sensor feedback voltage changes, thereby indirectly detecting the presence of coke. Generally the normal oxygen sensor feedback voltage is between 0.3-0.7V fluctuations, but there should be eight times alternating maxima and minima within 10 seconds. Once the valve produces carbon, oxygen sensor feedback voltage fluctuation becomes large, such as 0.3-0.7V becomes the original 0.1-0.9V. And the center voltage value becomes large, while the frequency of changes will slow. Oxygen sensor diagnostic computer to read the feedback voltage variation method saves time and effort, but if the car itself control system failure, you can not very accurate basis for judging, but also misleading no idea troubleshooting experience staff. Then there is this method can only be used for closed-loop EFI car, because only closed-loop control system was equipped with an oxygen sensor. In the automotive repair for the diagnosis of carbon has always been a problem, and if so the owners themselves to tell whether there is even harder to produce coke, its not as good as out of the question then repair to take preventive measures, by means of routine maintenance to keep normal performance of the vehicle, to the last resort, the only surgery.
Kero Throttle Bod I introduce to you a few of reducing, preventing, remove carbon approach:
First: Petrol filling high-quality wax and gum and other impurities is a major component of the formation of coke, so the cleanliness of gasoline high tendency to form carbon deposits on the weaker. Unfortunately, the quality of China's current gasoline is still relatively low compared with developed countries, only crude. High grade does not mean we have to pay attention to quality, that number is 97 less than the oil does not necessarily impurities of 93 octane labels represent oil, and do not represent the quality and cleanliness. Some vehicle owners in order to ensure cleanliness of gasoline, gasoline will be used in the practice of adding gasoline detergent. This can effectively prevent the surface of the metal layer is formed of carbon junction, and the original can be gradually activated carbon particles gradually removed, thereby protecting the engine from damage. But adding gasoline detergent must be careful, if added shoddy products will get the opposite effect.
Second: Do not travel long idle time idle time, the engine reaches normal temperature, time becomes longer, gasoline is sprayed onto the valve on the back of the slow rate of evaporation, carbon is also a result. Often idle while driving, the air flow into the engine it is small, so it becomes very weak, will promote the deposition of carbon on carbon scouring action.
Third: multi-speed running, try to improve my hand speed shift car to run high-speed multi-purpose role is to use air scour inlet to prevent carbon deposition on. In addition, the speed is also improved shift speed and multi-run has the same purpose, the original shift in speed becomes 2500 2000 conversion, not only can effectively prevent coke formation, but also can improve the car's power, but also to avoid change knocking gear speed is too low to bring, to protect the engine.
Fourth: the use of fuel additives, cleaning cleaning cleaning agent to clean the engine protection is quite simple, the use of specific methods and precautions to see product description.
Cleaning agent in the engine, fuel pump along with the fuel being sucked along the supply line. With the fuel flow, it can not only washed the tank, gum and gum and carbon filter on the fuel pump nozzle, and also when the engine is working properly, the automatic valve and the engine cylinder washed of carbon, the engine "youth", regained surging power. Because clean down from the tank, fuel pump and fuel filter pipe gum will be deposited in the gasoline filter, so the split-free cleaning, must be replaced fuel filter (petrol grid). Owners must remind you again that, due to the chemical cleaning agent to clean the rubber composition of the oil pipeline have a corrosive effect, when using this method, be sure to pay attention to the life cycle of the interval, otherwise it will speed up the rubber fuel supply line aging and corrosion.
Fifth: disassemble simple cleaning effort, simply click the correct method can be used. But for carbon serious engine, this method appeared to be inadequate, can not achieve complete cleaning cleansing purposes. "Avoid demolition cleansing" after the performance if the engine is still bad, but the technician tells you the problem is caused by too much carbon cylinder valve and when it had to use dismantling engines. Valve coke cleaning is simple, and after removing the intake manifold, clean by hand or using drugs soaked to clear. As for cleaning the engine cylinder coke, you must "go to war", remove the cylinder head, timing belt, etc. can only be cleaned. After reassembling the engine disassembly, the power, the sealing performance is inferior to the original, so that under normal circumstances, the dismantling of the cylinder cleaning soot should launch frequently. 2-3 ten thousand kilometers can for example be based on mileage and regular checks to avoid demolition clean-up, to avoid dismantling the engine and cause damage to the engine .
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