Oil quantity control and cleaning of the fuel injector of the generator set 'Q&A'

The fuel injector isGenerator setimportant parts. A device that atomizes oil to adapt it to combustion requirements. This is the function of the fuel injector. However, the control of fuel injection volume and clogging cleaning are problems that many customers are concerned about. Jiangsu Haixing Power will answer them one by one.

Customer from Taizhou, Jiangsu: How to control the amount of fuel injection?
Answer: The amount of fuel injection depends on the length of injection time. According to the different control methods of the solenoid coil, the fuel injector is divided into two types: voltage-driven type and current-driven type. The voltage type is also divided into low resistance and high resistance. High-resistance can be connected to 12V, low-resistance can only be connected to low voltage. If you connect it to 12V incorrectly for a long time, the coil will burn. When injecting fuel, the voltage provided by the computer is constant, such as 12V, and the fuel is cut off. It immediately changes to 0V. This change is instantaneous, just like the concepts of 0 and 1 in computer language. There is no 0.5 in between. In other words, this is a pulsating DC signal. It is not a term such as alternating current. , what is the concept of alternating current? The intersection of positive and negative is called alternating current. It seems that except for the part before the generator rectifier, there is basically no access to alternating current in the car.
For the same type of EFI vehicle, the pressure of the gasoline pump is constant. Regardless of the opening of the throttle, as long as it is adjusted by the fuel pressure regulator, the pressure of the fuel injector is always constant. The fuel injector is connected to the fuel pump. Strictly used with the fuel pressure regulator, only the designed pressure, fuel injector To achieve the best atomization effect, the pressure is lower than the design pressure, the sprayed oil is not mist, but columnar, and is not suitable for mixing with air; the pressure is too high, the sprayed oil has a conical shape, and is not easy to mix, and the force of the spray If it is too large, a lot of fuel will be sprayed directly onto the pipe wall, directly affecting the mixing ratio parameters. Whether accelerating or idling, the pressure should be constant. Different models have different pressures.

Customer from Nanjing, Jiangsu: When the fuel injection nozzle is clogged, fuel injection is not smooth, or there is carbon deposits and glue in the gap between the fuel injection nozzle, how should it be cleaned?
Answer: Jiangsu Haixing Power technicians remind everyone that the cleaning of the fuel injectors should not be carried out on schedule, let alone feel psychologically uncomfortable if it is not cleaned for a long time. In fact, the actual cleaning is very little.
One is that after the fuel is filtered through the dense mesh of the gasoline pump and then filtered by the fuel filter, the size of the impurity particles in the gasoline flowing through the injector is not an order of magnitude compared to the gap in the injector. Don't worry, it cannot be blocked.
On the other hand, the glue contained in gasoline is difficult to retain when the gasoline is sprayed out at high speed when passing through the gap. The so-called drop of water will penetrate the stone. Not to mention the countless times of knocking between the needle valve and the contact surface every day. How can it be glued here?
Another thing is that most models use out-of-cylinder injection, and the temperature here is not high, which is several times better than the working environment of spark plugs. To be honest, it is difficult to think of a fault.
The location that really easily affects atomization should be the outer surface of the fuel injection port of the fuel injector. A car that burns poorly will easily cause recoil and pollute the area. This is also divided into two. A car that burns well will not recoil. A car that burns poorly, even if it is cleaned, will only run a few kilometers and pollute again. It's useless to wash it. Treat the disease first and get rid of the root cause first. For example, a car that burns well will be clean no matter when you turn on the spark plug; a car that burns poorly, even if you replace the spark plug with a new one, in 5 minutes When you take it off later, you will see that it is still black and full of carbon deposits.
In fact, the so-called cleaning agents contain things like benzene or benzene aromatic hydrocarbons. When added to the engine for combustion, they can melt part of the carbon deposits. A cheap cleaning agent is a carburetor cleaning agent, which can also be added for combustion. It costs 4 yuan a bottle. Of course, there are better brands, but the price is by no means as high as the hype. In fact, normal engine combustion is also a process of constantly producing carbon deposits and constantly ablating carbon deposits. It is a relatively conservative process. There is no carbon deposit. Some friends always feel good psychologically whenever they see the black water flowing out from behind the exhaust pipe when cleaning carbon deposits. In fact, 90% of the black water is notGenerator setInternal carbon deposits. What's more, after it is washed and dried, burning gasoline will continue to produce corresponding carbon deposits until it reaches equilibrium. It doesn't make much sense. Don't wash it unless you have to. In fact, the combustion temperature of benzene aromatic hydrocarbons in the cylinder is much higher than that of gasoline. It is not good for the car to wash it in the sauna.
The focus of EFI car maintenance is still on the throttle. There is a lot of grease. Buy a bottle of slightly better carburetor cleaner, take out the air filter, turn on the fire, constantly change the throttle, and spray into the inlet pipe. This will not only clean the throttle. The valve can also clean the sensing hot line of the air flow meter. Be careful not to disassemble and clean the throttle. This is the same as the carburetor. Closing and opening the door is a process of constant wear and tear. Even if it is worn, the two worn surfaces still fit closely together. If not installed properly after disassembly, the position will change. , but it will not be closed tightly.