What is the effect of battery voltage on the starting of EFI engines?

The landlord, the battery has many functions after the car starts, such as the electrical appliances of the whole car depend on him, such as headlights, instrument lights, tail lights, glass regulators and so on. Because after the car starts, the generator starts working, and the output of his alternating current is very unstable. The generator alone cannot supply the electrical appliances of the car, so the designers directly charge the electricity from the generator to the battery through the rectifier regulator, and then the battery supplies power to the electrical equipment of the whole car.

The battery has a lot of functions after the car starts, and the electrical appliances of the whole car depend on it, such as headlights, instrument lights, tail lights, glass regulators and so on. Because after the car starts, the generator starts working, and its output is AC power that is very unstable. The low-speed generator alone cannot supply the electrical appliances of the car, so the designers directly charged the electricity from the generator through the rectifier regulator to the battery, and then the battery supplied power to the electrical equipment of the whole car.

When the engine is running at low speed and the engine power generation is insufficient, the lighting and audio devices are used for electricity; When the engine is running at high speed. When the generator generates enough electricity, it stores excess electricity. The charging and discharging of the battery can be displayed through the ammeter.

The second is that it is also a surge voltage receiver, which can stabilize the voltage and protect the normal operation of electrical appliances. The generator and the battery are connected in parallel, if the battery is disconnected and the engine speed is very high, the current in the circuit will suddenly become larger, and the current in the stator winding of the generator will produce a sudden change, which is bound to produce self-inductive electromotive force, produce overvoltage, and is not absorbed by the battery and directly added to the electrical equipment, and the electrical equipment will be burned out. If the revs are low at this point, the engine will stall due to insufficient voltage.

If the voltage is too low, you won't be able to start the car. Generally, less than 9 volts will not supply the engine computer. If you start it, you won't be able to get on the car, and you won't be able to bring the starter.

There are many possible factors for poor starting:

If the engine rotates briskly but takes a long time or can be started several times, the factors of the battery and starter can be ruled out, which may be a problem of ignition and oil supply.

If you feel that the engine is rotating heavy when starting, as if you can't take it, the factors of the battery and the starter are relatively large, which may be due to the lack of power or aging internal resistance of the storage hail pool, or it may be the problem of the starter.

There are many possible factors for poor starting:

If you feel that the engine is spinning briskly but it takes a long time or can be started several times, you can rule out the factors of battery and starter, which may be a problem of ignition and oil supply.

If you feel that the engine is rotating heavily when starting, as if you can't move it, the factors of the battery and the starter are relatively large, which may be the lack of power or aging of the battery, or it may be the problem of the starter.

Generally speaking, the reason why a motor vehicle cannot be ignited is mainly the battery loss, that is, the voltage is insufficient. Of course, there is also a problem with insufficient fuel, a faulty oil pump or poor oil circuit, as well as too much gel in the fuel injector, or the ignition coil and spark plug, including your starter motor.