The first automotive direct injection system used to run on gasoline was developed under Hans Scherenberg s leadership, and was introduced by Bosch was basically a high-pressure diesel direct-injection pump with an intake throttle valve set up . ( Diesels only change the amount of fuel injected to vary output; there is no throttle . ) It used a normal gasoline fuel pump, to provide fuel to a mechanically driven injection pump, which had separate plungers per injector to deliver a very high injection pressure directly into the combustion chamber.
