10-02-2019, 12:47 PM
(10-02-2019, 12:01 PM)Ben70_imp Wrote: If anyone has a multi channel oscilloscope available, we could hook into cyls 1 and 2 injectors and determine if they are firing at the same time. If so, it would be ported fuel injection with a waste pulse, or possibly continuous pulse like the old throttle body injection on cars.
If they don't fire at the same time, it would be sequential fuel injection.
I don't remember reading anywhere that it specified sequential fuel injection.
Interesting point to determine, in any case.
Ben
Throttle body injection worked best in multi-cylinder applications like V-8 and V-6 where there are multiple intake ports constantly drawing the mixture in. Most bikes and cars now have sequential/multipoint/whatever injection (except some Triumphs and Guzzis, NC700X.750X twins, and Gold Wings), meaning one injector per cylinder.
With that, there would be a waste of fuel half the time. It wouldn't be a 50% waste of the fuel, but still noticeable. Bikes with the cam pulse signal generator do not get markedly better mileage.
If there was a waste "squirt", you could swap the injector connectors for #2 & #3 cylinders, and it should run the same.