The sequence is represented by a number sequence, where each number corresponds to a cylinder. For example:
* A 4-cylinder engine might have a firing order of 1-3-4-2. This means cylinder 1 fires first, then cylinder 3, then cylinder 4, and finally cylinder 2. The sequence is chosen to optimally balance the reciprocating forces of the pistons.
* A V8 engine might have a firing order like 1-8-4-3-6-5-7-2. V8 firing orders are more complex due to the arrangement of cylinders in two banks (V-shape).
The optimal firing order depends on several factors, including the number of cylinders, their arrangement (inline, V, flat, etc.), and the crankshaft design. Engine manufacturers carefully determine the firing order during the design process to achieve the best balance of power, smoothness, and efficiency. Incorrect firing order can lead to increased vibration, reduced power, and even engine damage.