What about the inspection of fuel injectors in cars?
First, the injector is subjected to a series of tests after assembly, including its sealing, injection pressure and spray quality tests to ensure that its performance is up to standard. Secondly, for the detection of the injector, we usually use special equipment, that is, the injector test bench. During the testing process, if the injection pressure of the injector fails to meet the technical standards, the atomization effect is poor, oil dripping or leakage occurs, and it cannot be recovered by cleaning and adjusting, it needs to be replaced. Further, we can also judge the state of the injector by observing its injection Angle and atomization condition. In the cleaning process, pay attention to the oil injection Angle should be consistent (or in line with the vehicle factory technical standards), the atomization effect should be uniform, no jet phenomenon. In addition, we can also evaluate the performance of the injector by measuring the amount of fuel injected. When the engine is running, the working sound of the injector is monitored by a long handle screwdriver or stethoscope to determine whether it is working normally. Finally, we also need to test the electromagnetic coil of the injector and measure its resistance through a multimeter. If the resistance value is infinite, it indicates that the electromagnetic coil is broken and the injector needs to be replaced. These steps are key to ensuring that the fuel injector works properly.
The role of the pressure regulating screw of the fuel injector
First, the working principle of the fuel injector
In the gasoline engine, the injector is a very important part of the engine fuel system. When the injector works, it enters a certain amount of fuel into the cylinder through the nozzle to ensure the normal operation of the engine. However, in order for the injector to work properly, it is necessary to ensure that the amount of fuel injected and the pressure are properly matched.
Second, the role of the pressure regulator screw of the injector
The injector pressure regulator screw is a small part that can control the pressure of the automobile injector. It ensures the normal operation of the injector by adjusting the pressure inside the injector. The principle of adjusting the pressure of the injector is to change the force of the injector spring by adjusting the position of the injector adjusting screw, and then change the internal pressure of the injector.
Three, how to adjust the fuel injector pressure regulator screw
Before adjusting the pressure regulator screw of the injector, it is necessary to know the pressure value of the various components of the engine. On this basis, open the hood and locate the injector adjustment screw. Use a wrench to turn the adjusting screw counterclockwise or clockwise to adjust the pressure of the injector according to the needs of the engine. When adjusting, it is necessary to pay attention to only fine tuning each time to avoid excessive pressure adjustment leading to engine failure.
Four, the importance of fuel injector pressure screw
The pressure regulator screw of the injector plays a vital role in the normal operation of the automobile engine. If the fuel injector pressure is too large, the amount of fuel injection will increase, resulting in excess fuel burn, the fuel consumption of the vehicle will increase, but also lead to the engine idle instability, excessive acceleration and other problems. If the pressure of the injector is too small, it will lead to the loss of power of the vehicle, engine explosion and other serious problems. Therefore, for automotive maintenance engineers, owners, the correct adjustment of the fuel injector pressure regulator screw is very necessary.
【 Conclusion 】
Although the fuel injector pressure regulator screw is a small part in the automobile engine, it is crucial to the normal operation of the entire automobile engine. Accurate adjustment of the injector pressure regulator screw can ensure the power, stability and fuel economy of the engine, which is a very important operation for the owner and the repairman.
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