First, the meaning of motorcycle electric injection, is the application of electronic fuel injection system in motorcycle. Use it to replace the original motorcycle carburetor and other fuel supply system.

Two, if you are asked to develop, or design a motorcycle electric spray system, what should you do? This is the essential difference between maintenance teachers and trainers. If this logic does not make students understand. The more parts you explain to him, the more vague the student, the more unable to learn, the more unable to remember.

That is to say, before the student learns about it, he needs to think about what he would do if he were to install an electric spray system on a motorcycle himself.

In this way, students will think about when to fuel the engine, how to achieve the fuel injection, how to control the fuel injection. Thus, it leads to the injection sensor, gasoline pump, control computer, nozzle and other key components.

1. According to the above analysis, there are three components of the electric spray system of motorcycle: sensor, controller (ECU) and actuator.

Thus, the sensor transmits the collected information to the processor ECU, which then arranges the actuator to complete the instructions after processing the information. For example, sensors are the human eyes and ears, the processor ECUs are the brain, and the actuators are the hands and feet.

2. Discuss each part of motorcycle sensor, controller (ECU) and actuator separately.

(1) Name of sensor and actuator

The thing to think about here is that each sensor and actuator should have an appropriate name if it wants to achieve a different role. We combine the name of the motorcycle sensor and the actuator in the actual work, and find a rule that the sensor and the actuator of the motorcycle electric spray system are named for the function and role, so that it is easy to remember the name and role of each sensor and the actuator. For example: idle servo motor, commonly known as idle motor, is to control the idle function of the electric spray motorcycle parts.

(2) How the sensor and actuator work.

Whether it is sensor signal acquisition or actuator signal output, at least three basic wires are required on each sensor or actuator.

That is, the sensor should have three basic lines, live line, neutral line, signal line, to achieve signal acquisition. The actuator should also have three basic lines, live line, neutral line, signal line, to achieve signal output.

Let's ignore the reality for a moment, some models because of the parts of the internal electrical design circuit is different, or several electrical parts in order to produce convenient, combined production and use. Lead to different sensors, the actual connection wire is not necessarily three, in the real sensor, from one wire, two wires, three wires have.

Normally, for example, the sensor's firewire is the 5 volts supplied by the ECUS. Due to different models of internal electrical design is not the same, in the actual car on a line. Until you understand how the internal components work, you will know when the wire is the ECU supplying it with 5V voltage and when it is the ECU supplying the signal.

We set this standard, is to let beginners quickly grasp the electric principle of motorcycle electric spray parts. There used to be repairmen who took what they said out of context and started to say that a certain sensor of a certain car was one wire, a certain sensor of a certain car was two wires, and so on. This isn't teaching. This is showing off work experience.

Similarly, the three basic wires on the actuator, the live wire is 12 volts, and the signal wire is the ECU to provide signals to the actuator. The zero line takes the rail.

Compared to the three basic wires on the sensor, the live wire on the sensor is the 5 volts supplied by the ECU, which provides the signal to the ECU. The zero line takes the rail.

3, master these basic principles, and then according to the work needs, to the car respectively measure the direction of each wire on each sensor or actuator, draw the foot protocol diagram of each component, the internal wire resistance value of each component of the vehicle, and record.

Combined with different vehicle conditions, gradually practice manual code reading, and computer fault detection methods. Through practical operation, gradually accumulate experience.

Theory can dominate practice, practice is the only standard to test truth. In the electric spray motorcycle maintenance operations, as far as possible to use digital multimeter. When the electrical components are disassembled, turn off the ignition switch first, and then remove the negative battery pole. Before removing each electrical component, it is best to use a computer monitor to measure the relevant parameters of the component and record them. Avoid data loss, bring unnecessary trouble!
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