Abstract: An exhaust arrangement for a multi-cylinder internal combustion engine of a vehicle which has a row of cylinders. The arrangement includes an exhaust manifold including a branch portion having a plurality of branch pipes corresponding to the cylinders, a catalyst disposed downstream of the exhaust manifold, and an exhaust pipe connecting the exhaust manifold to the catalyst. The exhaust pipe defines an exhaust path having a bend. The bend includes a plane dividing an interior of the bend into equal halves. A partition divides the exhaust path into first and second exhaust passages coextending in a longitudinal direction of the exhaust pipe. The partition extends in the bend in alignment with the plane. An oxygen sensor is disposed at the bend of the exhaust pipe in alignment with the partition and projects into both of the first and second exhaust passages through a periphery of the partition.

Abstract: An exhaust arrangement for a multi-cylinder internal combustion engine of a vehicle which has a row of cylinders. The arrangement includes an exhaust manifold including a branch portion having a plurality of branch pipes corresponding to the cylinders, a catalyst disposed downstream of the exhaust manifold, and an exhaust pipe connecting the exhaust manifold to the catalyst. The exhaust pipe defines an exhaust path having a bend. The bend includes a plane dividing an interior of the bend into equal halves. A partition divides the exhaust path into first and second exhaust passages coextending in a longitudinal direction of the exhaust pipe. The partition extends in the bend in alignment with the plane. An oxygen sensor is disposed at the bend of the exhaust pipe in alignment with the partition and projects into both of the first and second exhaust passages through a periphery of the partition.

Abstract: An engine output characteristics control system includes means for monitoring a selection of speed ratios of a power transmission to provide information concerning transmission gear position. The control system receives transmission gear position indicative information to detect selection of a specific speed ratio of the transmission for providing information indicative of the selection of the specific transmission gear position. The control system is responsive to the specific transmission gear position selection indicative information for deriving an engine control signal for controlling the engine output characteristics so that the engine output is adapted to the specific speed ratio.