People who use cars generally know that the engine runs smoothly and saves fuel within two to three years before purchase and use. However, after a few years of use, some car owners will obviously follow the maintenance manual for standard maintenance, but many vehicles inevitably need to start. For problems such as difficulty, jerky operation, easy flameout and increased fuel consumption, many repair shops recommend that car owners conduct disassembly and overhaul. But the reality is that once the engine is disassembled and reinstalled, unavoidable problems such as air leakage and power loss are prone to occur. In fact, most cars have been in operation for several years, especially due to the often crowded road conditions in the city. Various engine problems are caused by carbon deposits.
Carbon deposits are carbon and vinyl substances that accumulate in intake and exhaust valves, intake ducts, combustion chambers, fuel nozzles and other parts of the engine. The formation of carbon deposits is manifold. Simply put, the engine's power comes from the mixed gas, which enters the combustion chamber through the intake valve, and a small amount of gasoline will stick to the intake valve. When encountering high engine temperatures, gasoline cannot burn completely burnt hydrocarbons, paraffin wax and chewing gum into chewing gum. If the fuel injector is dirty, the sprayed gasoline will be in a poor atomization state, and the gasoline and air will not mix uniformly, which will increase condensation. Because rubber carbon has the characteristics of absorbing gasoline, this layer of carbon deposits will absorb gasoline. The absorbed gasoline is then burned into rubber carbon, forming a thicker carbon deposit. Thicker carbon deposits absorb more gasoline, which is too vicious. Cycle until excessive carbon deposits are formed.
Carbon deposits in the combustion chamber are caused by colloids in gasoline components and hydrocarbons that cannot be completely detonated. The tiny carbon particles produced will not be discharged with the exhaust gas and accumulate in the combustion chamber. If the carbon deposit in the combustion chamber is severe, it will burn. The temperature of the combustion chamber increased, causing the spark plug to catch fire, and the mixture in the combustion chamber exploded on its own. These two knock points will cause a sudden increase in cylinder pressure, damage the surrounding parts of the engine, and produce a sound similar to knocking the cylinder. knock. Therefore, it is necessary to remove the carbon deposits in the intake valve and combustion chamber.
Then, when repairing the vehicle, it is very necessary to determine the location and distribution of carbon deposits and carefully observe with the industrial endoscope
, which is a time-saving and convenient method.
The 4S shop can quickly confirm that the carbon deposits are basically near the intake pipe and intake valve based on the results of the endoscopic observation, and carry out targeted treatment to avoid the disassembly and maintenance of large engines. After maintenance, the engine runs smoothly and the effect is very good. Customer reputation.
Endoscopes in the automotive repair industry can not only perform engine failure checks, but also deal with common problems such as clogging and damage to the three-way catalytic converter. Once the three-way catalytic converter has a problem, the car will not be able to pass the review of the vehicle management department, which will lead to increased fuel consumption and air pollution problems. In the next article, it will be a typical three-way catalytic converter damage repair diagnosis problem.