I can only, first hand. recall Honda and their VTEC-E (civic VX) engine design in an attempt to induce an ultra lean burn (22:1) that shut one of the two intake valves off below 2500RPM. This brought the charge in from one corner of the chamber and created a swirling effect that aimed to atomize the mixture further.
They likely did this directly in the combustion chamber to reduce the problem of the long travel distance of a swirling mixture vs a straight flow. You could argue that it was for simplicity but the mechanism that controlled the operation of the valves although simply actuated was not simple in itself.