Carburetor models — general description (Nissan Bluebird T12)

The ignition system is divided into two circuits, low voltage (primary) and high voltage (secondary). The low voltage circuit consists of the battery, ignition socket, primary coil winding and integrated circuit of the ignition unit (integrated circuit) and the signal generation system inside the ignition distributor. The signal generation system includes the pulse generator, stator and magnet. The high-voltage circuit consists of the secondary winding of the ignition coil, the ignition wiring of the breaker-distributor post to the ignition coil, the rotor, the high-voltage cables and the spark plugs.

Note: Black/red wire on later models replaced with black/white

The ignition distributor is mounted on the left side of the cylinder head and rotates from the camshaft. The ignition advance is set in the ignition distributor and is controlled mechanically and by vacuum. The regulator mechanism consists of two opposite weights that move from the distributor shaft under the action of centrifugal force, with an increase in engine speed. They rotate the pulse generator relative to the distributor shaft and create the ignition advance. The weights are held in position by two light springs, the correct setting of the ignition advance depends on the elasticity of the springs. The vacuum regulator consists of a diaphragm, one side of which is connected through a small-diameter hole to the carburetor and the other side to the ignition distributor. The pressure drop in the exhaust manifold, which changes depending on the engine speed and throttle position, causes the diaphragm to move, the diaphragm in turn moves the support plate, reducing the ignition advance angle.



The source of the article is on the website: www.NissanBook.ru

Warning: The voltages produced by contactless ignition systems are significantly higher than those produced by a conventional system.