What is the ignition sequence of an eight-cylinder car? What is the ignition sequence of twelve cylinders?
If the right side is: 2,4,6, and the left side is 1, 3,5. The general time sequence is: 1-6-5-4-3-2.
Automobile engines are all multi-cylinder engines, and common automobile engines have four cylinders and six cylinders. A multi-cylinder engine consists of several identical cylinders, which are arranged on a cylinder block and share a crankshaft. The crankshaft of a four-stroke engine rotates twice in a working cycle, that is, 720 degrees. In order to keep the working balance, it is required that the ignition interval angles of all cylinders are equal. The ignition interval angle of all cylinders in cylinder 4 is 180 degrees, and that of cylinder 6 is 120 degrees.
Extended data:
Ignition sequence depends on engine structure, crankshaft design and crankshaft load. There are two references to the crankshaft. In fact, the stability of the engine is largely determined by the crankshaft. The centrifugal inertia force produced by the uneven rotating mass of crankshaft will make the engine vibrate.
Therefore, the crankshaft cranks (journal and cranks at both ends) should be as symmetrical and uniform as possible, the two cylinders that work continuously should be separated as much as possible, and the left and right rows of cylinders of V-type engines should work alternately as much as possible. Therefore, the engine must have an ignition sequence that can balance the operation of the crankshaft.
The cylinder arrangement of automobile engine is usually in-line arrangement. The cylinders of an in-line engine are arranged in a row, and each cylinder is upright. They are arranged on a body and share a crankshaft and a cylinder head. The in-line engine is relatively simple in structure and easy to manufacture and maintain. However, due to the vertical cylinder, the front of the car is relatively high, which affects the aerodynamic design of the car. Therefore, in-line engines are mostly used for small engines such as 4 cylinders to prevent oversize.
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