Exhaust treatment system for internal combustion engine

Details Exhaust treatment system for internal combustion engine Exhaust treatment system for internal combustion engine

2011-08-02

2011-08-02

Gimie, Mahmoud (Department: 3747)

Internal-combustion engines

Charge forming device

Exhaust gas used with the combustible mixture

C701S108000

Reexamination Certificate

active

07987837

ABSTRACT:
Systems and methods are provided for operating an engine exhaust system. In one example, a system comprises a first valve, and a second valve coupled to the first valve via a shaft. A first position of the shaft situates the first valve closed and the second valve open, a second position situates the second valve closed and the first valve open by a first amount, and a third position situates the second valve closed and the first valve open by a second, larger amount.

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