hi all i saw modification of this on bike.
i just wonder if it will work on car's engine

its a thing to let us save fuel, and preserve the low end torque.

see the pic, (plz dun mind it is a 2 stroke, more later)
it menas when the intake is close, there is something like 'reverse flow' of fuel+air
or maybe it means momentum of intake air still comming in
so the reserve actually can hold it (something like the air inside get compressed?)
than when the intake open again it can suck from...