it has this word Acoustic, does it mean using sound wave to control ? induction engine, very new thing to me. i understand force induction, which is turbo or supercharger. does this just simple means using another method to increase power and efficiency of fuel efficiency?
ok then, how about Dual VVti, isnt this already control the intake valve? you said not a new tech., who else do you know of has this as well?
very interesting old tech here.
oh just found out, tech from Lexus,
taken from lexus website
"Rather like an athlete, an engine performs better when it breathes more deeply. One way to increase the amount of air entering the engine is to optimise the length of the intake manifold. At a certain engine speed, the airflow through the intake manifold increases naturally as a result of physical forces at work in the induction process. The effect is a little like that of a supercharger. Normally, this extra rush of air happens at only one particular engine speed.
However, ACIS varies the length of the intake manifold in three stages, so you gain this natural, deep-breathing performance advantage across a broad range of engine revs."
looks like a simple system to force more air into the chamber.
maybe it has no maintenance required. and cheaply manufactured and better for toyota image. No maintenance car.
seem japanese road car not really into turbo/supercharger yet. instead using simple method or hybrid for fuel efficiency
thus is a challenge with turbo and N/A engine. Personally I would like small cc engine with turbocharge. less roadtax