BTW: The fuel at gasoline engines is never sprayed into to combustion chamber, but into the air intake manifold.

Even at the old style Mercedes Diesel (OM 621 ff., OM 601 ff.) always sprayes into the pre chamber.

Direkt injection used to be a technology for certain truck engines, for the new generation of tdi-engines of Audi and VW and for the cdi-engines of new Mercedes. And, yes, there used to be some Rover and Fiat with direct injected Diesels around.

There are some direct injected gasoline engines. First was Mitsubishi with the gdi-engines, today VW and Audi has the new technology on the market. And Mercedes is also introducing new engines with this technology.

Well, look back in history: The 300 SL Gullwing and the Gutbrod Superior had also direct injected gasoline engines. The guy who designed them did his training at the Luftwaffe during WW II, where direct injection was commonplace for fighter plane piston engines.

Kind regards
Eberhard
(living pretty much in the middle between the place where the Gullwing was developed and where Gutbrod had their plant)