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Home ::  Articles ::  Related Articles ::  How Electronic Ignition System Works?

How Electronic Ignition System Works?

Signal input of the electronic control ignition system: In a microprocessor control ignition system, the control system has input with multiple sensors signals: benchmark position, crank angle, rotational speed, water temperature, inlet pressure (or inlet flow) throttle position, and so on. Common pulse signal generators are including: magnetic pulse generator, metal detection sensor, Hall Effect sensor and photoelectric sensors.

Control strategy of electronic control ignition system

In a microprocessor control ignition system (Read also Understand R/C Engine Ignition System), electronic control unit (ECU) can not only produce an ignition signal, but also can control on the position of the ignition signal (decided to the ignition time) and shape (decided to the size of the primary loop closure Angle), So the control strategy of control system determine the advantages and disadvantages of ignition system and engine to performance good or bad in a great extent.

The control method of ignition advance Angle     

ECU is controlled ignition time according to all kinds of working conditions of the engine. First is to find the basic ignition advance angle from the store data according to the speed and input pressure signal of the engine, and then modify it in accordance with the relevant sensor signal value to get the actual ignition advance angle. The actual ignition advance angle is composed of three parts: the initial ignition advance angle, basic ignition advance angle and ignition advance angle.

Maintenance of ignition advance angle correction: warm, correction of overheating, air-fuel ratio feedback correction, the stability of idle speed correction, correction of detonation, the maximum and minimum advance angle control. (Also read Maintenance for AGM-30 Gas Model Aircraft Engine and Proper Use and Maintenance on Model Aircraft Engine)

Method of Closed Angle control

The time of Ignition coil current is the time that the engine to stock ignition energy with the form of establishing a magnetic field, and the time of the crank Angle

Closed angle control method of ignition coil current time is it in order to establish magnetic field accumulation ignition energy. In the form of time, the related crank angle is called a closed angle at that time. The principle of current time control is that do not affect the spark discharge and to ensure there are enough time to store energy and do not damage with overheating and destruction.

The method of measure the crankshaft position   

To control of the ignition time completely, you should measure the position of the crank shaft accurately, you should use the one of the way to measure it: counter delay technique method, 1 degree crank corner counting method, and pulse counting and delay synthesis.

Knock control   

When intense detonation occurs, all parts of the engine temperature rises, the output power decrease, seriously there still can cause sintering piston, piston ring, bearing damage and valve ablation, etc. Delayed ignition can reduce or even avoid detonation; the purpose of vibration control is to adjust ignition time according to the knock sensor signal and to make gasoline engine work in the critical state of detonation.

No distributor ignition system control (electronic distribution control) 

No distributor ignition system can eliminate the distribution part of the wear and power loss due to the distributor was cancelled. Since there will be no spark discharge phenomenon in the part of distribution, it has greatly reduced the electromagnetic interference. Depending on the difference of structure and ignition way, no distributor ignition system can be divided into two cylinder ignition spark (redundant) and each cylinder independent ignition.

Related Products: AGM-30 Airplane Engine Ignition