Turbocharger system for a two-stroke engine

1. A turbocharger comprising:

a turbine housing comprising an inlet and an outlet, and a turbine wheel coupled to a shaft;

said turbine housing comprising a first scroll and a second scroll for fluidically coupling the inlet and the turbine wheel, said first scroll having a first end adjacent said inlet and a second end adjacent the turbine wheel, said second scroll having a third end adjacent the inlet and a fourth end adjacent the turbine wheel, the first scroll is separated from the second scroll by a separation wall; and

an exhaust gas diverter valve coupled to the turbine housing selectively restricting flow into the first scroll and the second scroll, said exhaust gas diverter valve having a first valve end pivotally mounted adjacent the separation wall, the exhaust gas diverter valve having a first position with the diverter valve restricting flow into the first scroll and allowing flow into the second scroll, a second position blocking flow into the second scroll and allowing flow to the first scroll and a third position allowing flow simultaneously into both the first scroll and the second scroll,

the inlet comprises a first valve seat adjacent to the first scroll receiving an edge portion of a second valve end of said exhaust gas diverter valve and a second valve seat adjacent the second scroll, receiving the edge portion of the exhaust gas diverter valve;

the first valve seat and the second valve seat are integrally formed as recesses in the turbine housing.

2. The turbocharger of claim 1 wherein the first scroll has a first area to radius ratio and the second scroll has a second area to radius ratio different than the first area to radius ratio.

3. The turbocharger of claim 1 wherein the first scroll has a first area to radius ratio and the second scroll has a second area to radius ratio equal to the first area to radius ratio.

4. The turbocharger of claim 1 wherein the exhaust gas diverter valve comprises at least one butterfly valve to selectively close one or more of the first scroll and the second scroll.

5. A system comprising:

a two-stroke engine;

a turbocharger fluidly coupled to the two-stroke engine, the turbocharger comprising;

a turbine housing comprising an inlet and an outlet, and a turbine wheel coupled to a shaft;

said turbine housing comprising a first scroll and a second scroll for fluidically coupling the inlet and the turbine wheel, said first scroll having a first end adjacent said inlet and a second end adjacent the turbine wheel, said second scroll having a third end adjacent the inlet and a fourth end adjacent the turbine wheel; and

an exhaust gas diverter valve coupled to the turbine housing selectively restricting flow into the first scroll or the second scroll;

an exhaust gas bypass valve coupled between a tuned pipe of the two-stroke engine and a silencer, said exhaust bypass valve selectively communicating exhaust gasses from the tuned pipe to the silencer;

an actuator coupled to the exhaust gas bypass valve and the diverter valve; and

a controller coupled to the actuator simultaneously controlling positions of the exhaust gas bypass valve and the di eater valve with the actuator.

6. The system as recited in claim 5 wherein the controller controls the exhaust gas bypass valve independent of boost pressure of the turbocharger.

7. The system as recited in claim 5 further comprising a position sensor coupled to the controller, said position sensor generating a position sensor signal corresponding to an opening of the exhaust gas bypass valve, said controller controlling the actuator in response to the position sensor signal.