Carbon Deposits On Fuel Injection Nozzles And Their Impact

Automobile Fuel Injector, one of the key components of electronic fuel injection engine, will seriously affect the performance of the engine if it works well. Blockage of fuel injector will seriously affect the performance of the car. The reason for the blockage is that the carbon deposits in the engine are deposited on the fuel injector or the impurities in the fuel block the fuel injector passage. After the car has been running for a period of time, a certain amount of sediment will form in the fuel system. The formation of sediment is directly related to the fuel of the car: first, because the gasoline itself contains colloids and impurities, or dust and impurities brought in during storage and transportation, sludge-like sediments are formed in the fuel tank, fuel inlet pipe and other parts of the car over time; secondly, the unstable components in gasoline react at a certain temperature to form colloid and resin-like viscous substances. When these viscous substances are burned in the fuel injector, intake valve and other parts, the sediments will become hard carbon deposits.

In addition, due to urban traffic congestion, cars are often at low speed and idling, which will aggravate the formation and accumulation of these sediments. Fuel system sediments are very harmful. Sediments will clog the needle valve and valve hole of the fuel injector, affect the working performance of the precision parts of the electronic injection system, and lead to a decrease in power performance; Sediments will form carbon deposits on the intake valve, causing it to close loosely, resulting in unstable engine idle speed, increased fuel consumption and worse exhaust emissions; Sediments will form hard carbon deposits on the piston top and cylinder head. Due to the high heat capacity and poor thermal conductivity of carbon deposits, it is easy to cause engine knock and other faults; In addition, it will shorten the life of the three-way catalytic converter. The working quality of the fuel injector plays a fundamental role in the power of each engine. Due to poor fuel, the fuel injector does not work properly, causing serious carbon deposits in the cylinder; the cylinder barrel and piston ring wear faster, causing unstable idle speed, increased fuel consumption, weak acceleration, difficult starting and excessive emissions. In severe cases, the fuel injector will be completely blocked and the engine will be damaged.

Therefore, the fuel injector should be cleaned regularly. Long-term non-cleaning or frequent cleaning of the nozzle will have a bad effect. As for the time of cleaning, it should be determined according to the condition of the vehicle and the quality of the fuel added at ordinary times. Generally speaking, most users are now recommended to clean it around 20,000 to 30,000 km. If the vehicle is in good condition and the fuel quality is good, it can be extended to about 40,000 to 60,000 km. When the fuel injector is slightly clogged, it will also have a certain impact on the vehicle condition. Sometimes such a fault will occur: when the first gear is engaged and the vehicle starts, the vehicle will shake a little. When the vehicle is engaged in a high gear and accelerated, this phenomenon disappears. Assuming that the various sensors on the vehicle are working normally, the throttle valve has been cleaned, and the circuit is normal, it is likely that the fuel injector is slightly clogged.

However, when accelerating in a high gear, it is possible that the slight colloid is sprayed away (dissolved) again, and the performance of the vehicle is restored. In the case of such slight blockage of the fuel injector, it is generally not necessary to clean it. Because the slight colloid can be dissolved. Therefore, in daily driving, you should often run on the highway to reduce the possibility of carbon deposits. When the gasoline quality is poor or the vehicle has been driving for a long time, if the fuel injector is not cleaned for a long time, this blockage phenomenon will be more serious, causing the engine to spray poorly, the injection angle and atomization are poor, resulting in poor operation of the engine at idle speed, acceleration or full load conditions, resulting in a decrease in engine power, an increase in fuel consumption, an increase in emission pollution, and even the inability of the engine to work. Therefore, the fuel injectors should be cleaned and inspected regularly to ensure they are working properly.