Sequential Injection. Can I Have A Definition & Explanation Of How It Works?

[holden#1]

Just curious to know how it works different to the 'non sequential injection'.

[sircruisealotVS]

basically sequential injection works by pulsing the injectors only when the corresponding intake for that cylinder is opened. meaning that the injectors will only fire one or two at a time.
this works differently to a bank fire system where a series (bank) of injectors are all pulsed at the same time, even if the intake for that cylinder isnt opened. the fuel sits in the runner untill its intake is open where the mix then passes on to be combusted.
this is how i understand the two systems anyway...

[Troy711]

http://en.wikipedia.org/wiki/Fuel_injection

http://auto.howstuffworks.com/fuel-injection.htm

[holden#1]

basically sequential injection works by pulsing the injectors only when the corresponding intake for that cylinder is opened. meaning that the injectors will only fire one or two at a time.
this works differently to a bank fire system where a series (bank) of injectors are all pulsed at the same time, even if the intake for that cylinder isnt opened. the fuel sits in the runner untill its intake is open where the mix then passes on to be combusted.
this is how i understand the two systems anyway...

In other words sequential injection saves heaps of fuel...

thanks guys... I understand better now.

[SweetWagon]

not heaps but a small margin, they are still pulsing the same amount just at different times. sequential injection uses a cam angle sensor to sense when the intake valve will be open