Where does cylinder 4 fire in a 4 stroke engine?
Cylinder #4 which fires after cylinder #3 should be two strokes behind the power stroke on cylinder #1. Examining Figure 2 again should help deduce that cylinder #4 should be on the intake stroke (i). Now cylinder #2 should be 3 strokes behind the power stroke on cylinder #1. That would put cylinder #2 on the exhaust stroke (e).
What is the firing order of a 4 cylinder engine?
Most 4-cylinder engines have a firing order of 1-3-4-2 although other firing orders such as 1-3-2-4, 1-4-3-2, 1-2-4-3 are possible. Consider the inline 4 engine in Figure 1.
Why are cylinders not fired at regular intervals?
Note however that in some V engines, especially V8 engines and above, manufacturers or engine builders don’t necessarily fire cylinders at regular intervals; this is a concept of engine design called uneven firing. This is done to obtain an aggressive burbling and throaty engine sound. Uneven firing orders will not be discussed in this article.
What are the four strokes of an engine?
Most engines today are classified as four stroke engines where stroke refers to the up or down travel of a piston. The four stages/strokes are intake, compression, power and exhaust strokes.
How often does a spark plug fire in a four stroke engine?
Assuming that the engine is a four stroke engine, the spark plug for each cylinder fires once every two revolutions.
Cylinder #4 which fires after cylinder #3 should be two strokes behind the power stroke on cylinder #1. Examining Figure 2 again should help deduce that cylinder #4 should be on the intake stroke (i). Now cylinder #2 should be 3 strokes behind the power stroke on cylinder #1. That would put cylinder #2 on the exhaust stroke (e).
Most 4-cylinder engines have a firing order of 1-3-4-2 although other firing orders such as 1-3-2-4, 1-4-3-2, 1-2-4-3 are possible. Consider the inline 4 engine in Figure 1.
How is the firing order of spark plugs determined?
The firing order of an engine is the sequence the spark plugs fire. On engines with a distributor, the firing order is determined by the routing of the spark plug wires from the distributor cap to the spark plugs in each cylinder. How do you calculate firing order?