Gm Global Technolgoy Operations, Inc.

Christopher C Wright

Robert J Moran

Michael A Potter

Sherif Hussein El Tahry

Fabien G Redon

Iain J Read

John A Pinson

An exhaust after-treatment system for a vehicle including a dosing agent that is selectively injected into an exhaust from a dosing agent supply includes a first module that determines a level of a dosing agent source. A second module selectively impedes vehicle operation by adjusting an engine operating mode if the level of said dosing agent source is below a threshold level.

Emissions conformance for an exhaust after-treatment system having a dosing agent supply

An intake assembly is provided for a sequentially fired eight cylinder V-type internal combustion engine including a cylinder block having a first band of cylinders and a second bank of cylinders. The assembly includes first, second, third, and fourth intake plenums mounted with respect to the engine. The first bank of cylinders includes a first group of two cylinders that fire ninety crank angle degrees apart from each other and the second bank of cylinders includes a second group of two cylinders that fire ninety crank angle degrees apart from each other. The first and second intake plenums are operable to communicate intake air to a respective one cylinder of the first group of two cylinders. The third and fourth intake plenums are operable to communicate intake air to a respective one cylinder of the second group of two cylinders.

Intake manifold assembly

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Howell, MI, United States of America

Christopher C Wright