How to make up for the defect of "disassembly-free cleaning and maintenance of oil nozzle and air inlet"

Ni Chuning is an expert in applied chemistry and automobile maintenance, the founder of the theory of "automobile ternary cleaning and maintenance" and the winner of the national invention patent of "automobile ternary cleaning and maintenance" technology. The products led by him are: Quanshuang brand ternary cleaning (maintenance) agent and special products for cleaning and maintenance of environmental protection engine emission control system. The product to control the black smoke emission of diesel vehicles is "Quanshuang brand hood". The product "Quanshuang brand diesel vitality sticker" for improving diesel combustion efficiency. At present, the "disassembly-free cleaning and maintenance method of oil nozzle and air inlet" is a widely used engine maintenance technology in China automobile maintenance enterprises, and some automobile manufacturers even list it as a 20,000-kilometer regular maintenance project for automobile engines. The maintenance method of nozzle and intake port without disassembly is a maintenance technology developed for carburetor engine and open-loop EFI engine in the mid-1980 s The material used is detergent dispersant, and the typical components are amino amide, polyethyl ether and butenamine, alkyl and succinic amide, and hydroxyl polyurethane, all of which belong to surfactants and are composed of polymers soluble in hydrocarbons and suitable connecting groups that can be connected to polar groups. Its cleaning function is realized by physically dissolving dispersed carbon deposits and deposits in fuel nozzles and air intake systems. The effect of "disassembly-free cleaning and maintenance of the oil inlet of oil nozzle" was very remarkable in 1980s and 1990s, mainly because leaded gasoline was still used in China at that time, and its octane number was also very low. No.70 gasoline is also used, which has high olefin content, poor oxidation resistance and much gum, so carbon deposition and deposits have a great influence on the engine. However, after entering the 2 1 century, all the cars produced and sold in China adopt closed-loop EFI engines, and leaded gasoline is no longer used as fuel, and the fuel quality has also been improved to some extent. Especially in 2005, after the fuel in China was produced according to the new standard, detergent dispersant was added to the fuel during the production process, so the influence of carbon deposition and deposits on the engine was no longer great, but manganese deposition, oxygen sensor poisoning and three-way catalyst blockage were replaced. Due to the influence of carbon deposit viscosity of EGR valve on environment-friendly engine, the effect of disassembly-free cleaning and maintenance of fuel nozzle and air inlet is gradually weakened, and its defects are gradually exposed. The main defects of "Nozzle and Intake Port Cleaning and Maintenance Method without Disassembly" are as follows: firstly, because it is a maintenance technology developed for carburetor engines and open-loop EFI engines in the mid-1980s, it can only partially clean the intake system and combustion system of the engine, which can not meet the all-round cleaning and maintenance requirements of the intake system, combustion system and exhaust system of environmental-friendly engines, especially the maintenance requirements of the three-way catalytic purification system with air-fuel ratio feedback control of environmental-friendly engines. Secondly, the colloidal carbon deposited can not be completely burned, but dispersed into particles and discharged in the form of black smoke, which will cause serious pollution to the three-way catalytic purification system of air-fuel ratio feedback control of environmental protection engines. Thirdly, the "fuel injector air inlet disassembly-free cleaning and maintenance method" has little effect on manganese deposits in clean and environmentally friendly engines, and cannot solve the influence of manganese deposits on the work of environmentally friendly engines. The defects of "cleaning and maintenance method of fuel nozzle inlet without disassembly" will have the following effects on environmentally friendly engines: 1. Pollution and interference oxygen sensor: The inner surface of the oxygen sensor in contact with the exhaust gas of the environmentally-friendly engine is provided with precious metal catalytic platinum, and the black smoke discharged from "cleaning and maintenance of the fuel nozzle and the air inlet will not disintegrate" can be adsorbed on the surface of the catalyst to form a chemical compound, resulting in catalyst poisoning failure. Because the catalyst can't play a catalytic role, the oxygen in the tail gas can't react with carbon monoxide to become carbon dioxide, which leads to the failure of the oxygen sensor. 2. Pollution and blockage of the three-way catalytic converter: The black smoke discharged from the "nozzle and air intake will not be disassembled for cleaning and maintenance" will be adsorbed on the surface of the three-way catalytic converter at the same time, forming a chemical complex, which will poison the catalytic converter and lose its catalytic effect on oxidation-reduction reaction, and the three-way catalytic converter will lose its purification effect on automobile exhaust, resulting in excessive exhaust gas. The discharged black smoke may also aggravate the blockage of the tee joint and increase the back pressure, resulting in the decrease of automobile power and the increase of fuel consumption. 3. Shorten the service life of the three-way catalytic converter: "Nozzle and air inlet are not disassembled for cleaning and maintenance" will aggravate the formation of chemical complexes on the surface of the three-way catalytic converter, aggravate the three-way blockage and aggravate the poisoning failure of the catalyst, so the service life of the three-way catalytic converter will be further shortened. Although there are some defects in the "fuel nozzle and intake port cleaning and maintenance method", it has certain influence on the environment-friendly engine, but its maintenance function of cleaning fuel nozzle and intake port is irreplaceable. The most ideal way to make up for the defect of "disassembly-free cleaning and maintenance of fuel nozzle and air intake" is to carry out ternary cleaning and maintenance after disassembly-free cleaning and maintenance of fuel nozzle and air intake of environment-friendly engine. "Automobile ternary cleaning and maintenance method" is a special technology of environmental protection engine maintenance independently founded and developed by Beijing Longquan Lu Shuang Technology Co., Ltd., and has obtained the national invention patent. It is characterized in that it can clean the air intake system, combustion system and exhaust system of the environment-friendly engine at the same time, and it can also remove the chemical compounds attached to the intake valve, combustion chamber deposits, oxygen sensor and three-way catalytic converter at the same time, especially its function of cleaning and maintaining the exhaust system, which fills the gap in the maintenance method of the three-way catalytic purification system of the air-fuel ratio feedback control of the environment-friendly engine. Three-way cleaning and maintenance can complement each other with the nozzle and intake port disassembly-free cleaning and maintenance, can make up for the weakness that three-way cleaning and maintenance can not clean the engine throttle and nozzle oil circuit, can eliminate the pollution of nozzle and intake port disassembly-free cleaning and maintenance to the exhaust system of environmentally-friendly engine, and solve the problems that nozzle and intake port disassembly-free cleaning and maintenance can not solve, such as manganese deposition of environmentally-friendly engine, poisoning failure of oxygen sensor and three-way catalyst, blockage of three-way catalyst and EGR valve, etc. The combination of two cleaning and maintenance methods can double the effect of engine disassembly-free cleaning. Automobile maintenance enterprises set up an all-round cleaning and maintenance project for environmentally-friendly engines, which can not only greatly improve the effect and technical level of disassembly-free cleaning and maintenance, but also greatly improve the economic benefits of disassembly-free cleaning and maintenance, and more importantly, effectively solve the problems and defects existing in disassembly-free cleaning and maintenance of environmentally-friendly engines.