What is the difference between continious and sequential fuel injection system?

Answer 1

continuous just pours the fuel in when the cylinder is rising up but sequential has a sequence that it follows,like it will put gas in at certain timing.

Answer 2

A continuous fuel injection system sounds like a constant-flow system, one where fuel comes out like out of a garden hose controlled by a valve. A steady flow, but the volume changes. Very few modern EFI systems use continuous flow - usually they pulse the fuel injectors so they're open all the way and then closed all the way, spending as little time in between as possible.

A sequential fuel injection system has an injector at each port. At least at low speeds, the each individual injector is timed to the opening of the individual intake valves (Often, the injectors need to stay open longer than the valve at high speeds, so timing is less important). The computer controls how much fuel to inject by how long the injector stays open rather than how far open the injector is.

Then there are a few in between systems like batch fire. A batch fire fuel injection system uses the same method of controlling how long the injectors open rather than how far the injector is, but it activates the injectors in groups without taking the valve timing into consideration. Still works pretty well, but the emissions aren't quite as low as with sequential.