BenK wrote:
Direct gasoline injection was invented here. Isuzu was the first to
my knowledge to offer a production ICE V6. It was for their truck line
outside North America. This was in the late 90's
Early 2000's had Toyota offer it here, but the injectors had a low GPH.
So supplemented with port inject above a certain RPM/throttle setting
The reason for Port injection over direct injection isn't because the direct injectors are not able to inject enough gasoline. The reason for the port injection is to achieve a stratified mixture of gasoline/air in the combustion chamber. It is difficult to achieve a good mix of gasoline and air with direct injection. By injecting gasoline in the intake port the gasoline has much more time to mix with the air and the air movement itself helps with the mixing.
