Exhaust manifold arrangement

Details Exhaust manifold arrangement Exhaust manifold arrangement

2006-12-19

2006-12-19

Huynh, Hai (Department: 3747)

Internal-combustion engines

Charge forming device

Exhaust gas used with the combustible mixture

C123S0650PE, C123S0650EM, C060S324000

Reexamination Certificate

active

07150273

ABSTRACT:
A passageway is provided between branches of a multi-branch exhaust manifold to reduce the amount of backflow (iEGR) into the cylinders at low engine speeds. The passage is located upstream of the turbocharger and can be at the part of the manifold where the branches merge for entry into the turbo. The passageway allows exhaust pressure pulse modulation so that high iEGR levels (using iEGR through delayed exhaust valve closing for example) are avoided. The passage may be controllable to modulate the effect based on engine conditions.

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