Quick Details
The nozzle is actually a simple electromagnetic valve, when the electromagnetic coil is energized to generate suction, suction needle was open, spray holes between the fuel through the needle valve head shaft needle and nozzle ring gap high-speed spray mist, conducive to the full combustion. Chinese nozzle , & nbsp; fuel spray nozzle & nbsp; simple solenoid valve; ▪ 3 4 fault exclusion cleaning directory 1 definition 2 ▪ coking effect; plug nozzle; bad seal ▪ ▪ air; oil sluggish ▪ less elastic ▪ 5 6 piston wear card dead fuel 7 troubleshooting 1 definition nozzle itself is a normally closed valve (normally closed valve means when no input control signals, the valve has been closed; the valve is always open when no input control signals, the valve has been turned), opened and closed by a valve needle up and down movement control valve. When the ECU issued a fuel injection command, the voltage signal will make the current flow through the coil inside the nozzle, generating a magnetic field to the valve pin, so that the valve can be opened so that oil can be emitted from the injection hole. The biggest advantage is to control the injection fuel supply is very accurate, so the engine can have the correct air-fuel ratio in any state, not only keep the engine running smoothly, its exhaust can meet environmental regulations and standards. 2 coking effect of as one of the key components of fuel injector of EFI engine, its quality of work will seriously affect the engine performance. Nozzle blockage will seriously affect the performance of the automobile. Jam is due to carbon deposition in the inner engine nozzle on the fuel or because of the impurities in the fuel injector clogging pathway. After a certain period of time, the fuel system will form a certain deposit. The formation of sediments and car fuel directly related to: the first is because the gasoline itself contains pectin, impurities, into the dust and impurities or the storage and transportation process, formation of sludge sediments of similar days and months multiplying in the automobile fuel tank, inlet pipe and other parts; the second is due to the unstable ingredient in gasoline reaction at a certain temperature, the formation of dope gum and resin. The viscous material in the fuel injector, intake valve and other parts, combustion, sediment will become hard coke. In addition, due to urban traffic congestion, the car is often in the low speed and idle state, it will increase the formation and accumulation of these sediments. Fuel system deposits have a great hazard. The needle valve, the valve hole sediment can clog the nozzle, affect the working performance of electronic injection system of precision parts, resulting in the decline in power performance; sediment deposit formation in the intake valve, which is not tightly closed, causing the engine idling instability, fuel consumption increases with exhaust emission deterioration; sediment will form a hard coke at the piston and the cylinder head and other parts, because the heat capacity of carbon and high thermal conductivity, easy to cause engine knock faults; also shorten the catalyst life of three yuan. The work of the nozzle is good or bad, the power of each engine play a fundamental role. Because the fuel injector due to poor work, so that the cylinder coke serious; cylinder, piston ring wear accelerated, resulting in idle instability, increased fuel consumption, weak acceleration, difficulty in starting and emissions exceed the standard, serious will completely clog the nozzle, damage the engine. Therefore, to regularly clean the nozzle, long-term cleaning or frequent cleaning nozzle will cause bad effects. As for the cleaning time, according to the quality condition and usually add fuel to determine, in general. The car is in good condition, the fuel quality can be extended to 4~6 in about km million. When the nozzle has a slight blockage, also have a certain impact on the condition. Sometimes there will be such a failure: hang a block, the car started, some other high-grade, jitter, acceleration, such a phenomenon has disappeared, assuming various sensors on the car to work normally, solar term valve also cleaned, the circuit is normal, it is likely that the injector slightly blocked the. However, the high gear speed, there may be a slight colloid was sprayed away (dissolved), the car's performance has been restored. Such a slight blockage of the nozzle of the situation, the general can not be cleaned. Because a slight gum can be dissolved. So in daily driving, should always run at high speed, in order to reduce the possibility of coke formed. When the gasoline quality is poor or the long running time vehicles, if the long term does not clean the fuel injection nozzle, this kind of blocking phenomenon will be more serious, thus causes the engine to spray.
