Exhaust arrangement for internal combustion engine
First Claim
1. An exhaust arrangement for a multi-cylinder internal combustion engine of a vehicle, the engine including a row of cylinders, the exhaust arrangement comprising:
- an exhaust manifold including a branch portion including a plurality of branch pipes corresponding to the cylinders;
a catalyst disposed downstream of the exhaust manifold;
an exhaust pipe connecting the exhaust manifold to the catalyst, the exhaust pipe defining an exhaust path;
a bend formed in the exhaust pipe, the bend including a plane which divides an interior of the bend into equal halves;
a partition dividing the exhaust path into first and second exhaust passages coextending in a longitudinal direction of the exhaust pipe, the partition extending in the bend in alignment with the plane; and
an oxygen sensor disposed at the bend of the exhaust pipe in alignment with the partition, the oxygen sensor projecting into both of the first and second exhaust passages through a periphery of the partition.
1 Assignment
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Accused Products
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.
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Citations
20 Claims
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1. An exhaust arrangement for a multi-cylinder internal combustion engine of a vehicle, the engine including a row of cylinders, the exhaust arrangement comprising:
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an exhaust manifold including a branch portion including a plurality of branch pipes corresponding to the cylinders;
a catalyst disposed downstream of the exhaust manifold;
an exhaust pipe connecting the exhaust manifold to the catalyst, the exhaust pipe defining an exhaust path;
a bend formed in the exhaust pipe, the bend including a plane which divides an interior of the bend into equal halves;
a partition dividing the exhaust path into first and second exhaust passages coextending in a longitudinal direction of the exhaust pipe, the partition extending in the bend in alignment with the plane; and
an oxygen sensor disposed at the bend of the exhaust pipe in alignment with the partition, the oxygen sensor projecting into both of the first and second exhaust passages through a periphery of the partition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An exhaust arrangement for a multi-cylinder internal combustion engine of a vehicle, the engine including a row of cylinders, the exhaust arrangement comprising:
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an exhaust manifold including a branch portion including a plurality of branch pipes corresponding to the cylinders;
a catalyst disposed downstream of the exhaust manifold;
passage means for defining an exhaust path having a length extending from the exhaust manifold to the catalyst;
bending means for bending the exhaust path to provide the exhaust path with a curve;
partition means for dividing the exhaust path into first and second exhaust passages coextending along the length of the exhaust path, the partition means equalizing the first and second exhaust passages at the curve; and
a sensor projecting into both of the first and second exhaust passages at the curve through the partition means. - View Dependent Claims (14, 15, 16, 17, 18)
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19. An exhaust arrangement for a multi-cylinder internal combustion engine of a vehicle, the engine including a row of cylinders, the exhaust arrangement comprising:
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an exhaust manifold including a branch portion including a plurality of branch pipes corresponding to the cylinders;
a catalyst disposed downstream of the exhaust manifold;
an exhaust pipe connecting the exhaust manifold to the catalyst, the exhaust pipe defining an exhaust path, the exhaust pipe having a longitudinal axis;
a bend formed in the exhaust pipe, the bend including a plane in which the longitudinal axis of the exhaust pipe lies, the bend including an inner curving periphery and an outer curving periphery extending longer than the inner curving periphery;
a partition dividing the exhaust path into first and second exhaust passages, the partition extending in the bend in alignment with the plane; and
an oxygen sensor disposed at the outer curving periphery of the bend in alignment with the partition, the oxygen sensor projecting into both of the first and second exhaust passages through a periphery of the partition. - View Dependent Claims (20)
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Specification