An engine that has surfaced and pretty much faded in a short time is Honda’s i-VTEC I Engine, a variant of the K-series DOHC engine family featuring gasoline direct injection. It made it’s debut in the previous generation 2004 Honda Stream 7-seater MPV in Japan, but the current Stream does not use this engine anymore, instead using a 2.0 litre version of the R-series i-VTEC SOHC engine.

The engine featured the ability to use ultra-lean air-fuel mixtures of about 65:1, much leaner compared to the the usual direct injection engine 40:1 ratio, and of course so much more leaner than the stoichiometric air-fuel mixture of 14.7:1 – this saves fuel. Fuel consumption dropped to 15km per litre. Power ratings remain the same at about 155 horsepower. This engine in the Stream is mated to a CVT gearbox with a manual 7 virtual gear shifting feature.

Honda also had a demonstration engine back in end 1999 where a 1.4 litre DOHC Honda engine was equipped with a VTEC-DI system. This was Honda’s first demonstration of direct injection to the public. The engine was installed in a Honda Logo (the predecessor to the Honda Fit/Jazz) and made power and torque outputs of 107 hp at 6200 rpm and 133 Nm at 5000 rpm.

Check out a video of the i-VTEC I engine after the jump.

Video: Honda’s i-VTEC I Engine: Direct Injection