general cylinder firing info

[jt1583]

on most cars, does more than one cylinder fire at a time? when i say fire i mean combust gas when its on compression stroke, not the thing for emissions. thanks

 

[Aikouka]

Engines fire at the end of compression stroke, and only one fires at a time, which is why there are proper spots on the coil pack for each cylinder (i.e. 4g63 = 4 - 1 - 2 - 3). There are no cylinders that even run the same spot in the same stroke. When one is on compression, the other one that's in the same spot is on exhaust.

 

[diviniti]

If you feel like reading, this will help you out alot.
Just click "next page" at the end of each page.
You will learn exactly how a motor works.

http://auto.howstuffworks.com/engine1.htm

 

[Defiant]

DSM ignitions are like 4-cylinder motorcycle motors, in that they fire off two cylinders at a time. One of the pair is on power, the other is on exhaust. It's not for emissions, it's not for power, it's just a tidy way to set up a four-cylinder engine's ignition scheme. It's a waste spark. Saves you needing a distributor and all the jimcrackery entailed in driving and mounting it, and all its parts.
It's a fairly new "innovation", leaving dozens of old-time ignition engineers with bruised foreheads from where they've slapped themselves and said, "Why didn't I think of that?"