Motorcycle Ignition Coil According To The Different Ignition System
Motorcycle Ignition Coil According to the different ignition system
Different ignition systems are generated due to the different control methods of the engine ignition timing and the primary coil current. According to the different ignition system
Development stage can be divided into: the traditional mechanical contact ignition system, non-contact ignition system, computer-controlled electronic ignition system and computer-controlled non-distributor electronic ignition system.
1. Traditional mechanical contact ignition system:
The traditional ignition system has its ignition timing and control of the primary coil current by the mechanical transmission of the breaker contacts to complete. The distributor shaft, which is driven by the engine camshaft, controls the relationship between the opening and closing angles of the breaker and the working stroke of the engine. In order to enable the ignition advance angle to automatically adjust with the engine speed and load changes, the distributor is equipped with a centrifugal mechanical advance device and a vacuum advance device to sense the engine speed and load changes. The biggest drawback of the mechanical ignition system is that the closing angle can not be changed because of the mechanical linkage between the breaker and the drive cam, and the closing time has a great relationship with the change of the engine speed. When the engine speed is increased, the contact closure time is shortened, The primary coil current reduces the ignition energy to reduce; when the engine speed decreases when the closing time is too long, resulting in the coil is too large to easily damage the current. This is a mechanical contact ignition system can not overcome the shortcomings.
2. Non-contact electronic ignition system:
In order to avoid the shortcomings of the mechanical contact ignition system contact easy to ablate the damage, after the widely used transistor technology has produced a non-contact sensor as a control signal to high-power transistor for the switch instead of mechanical contact non-contact electronic ignition system. A significant advantage of this system is that the primary circuit current is turned on and off by the transistor, so the current value can be controlled by the circuit. The downside is that the ignition time in this system still uses a mechanical centrifugal advance device and a vacuum advance device, which is poorly adaptable to the engine operating conditions.
3. Microcomputer controlled electronic ignition system:
In order to improve the accuracy of the ignition system and the adaptability of various conditions, in the electronic ignition system, based on the use of computer control. The system is characterized by: not only without the distributor, but also in the advance angle of the control side there is no centrifugal advance device and vacuum advance device. From the primary coil current connected to the ignition time all the use of computer control. The working principle is as follows: The microcomputer system detects the engine speed and the load by the sensor, thus inquires about the best control parameter in the internal memory, obtains the best ignition advance angle and the primary circuit of the ignition coil under this condition The best closing angle, through the control of the transistor off time to achieve control purposes.