How does petrol injection work?
I have a fairly good understanding of how engines work, both carbureted or diesel. But I cannot see how, in an injected petrol engine, there is still mention of a mixture setting. In a diesel, one sends an ample quantity of fuel to the injector, and a return line takes care of the excess, simple and efficient. Must I understand that, in an injected petrol engine, the quantity of fuel injected is metered in function of both the throttle setting, and the mixture setting compensated for air pressure?
Apologies if the question is dumb. Pointers to a good explanatory web site are just as welcome, it's not that I don't want to do any thinking on my own.