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Exhaust system, and engine device and vehicle with the same

Ryusuke Kato, +2 more
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TLDR
In this article, a first oxygen sensor (S1) is attached to an exhaust pipe (101) connected to a standard cylinder in which the amount of injected fuel is the closest to the average of the amounts of fuel injected in a plurality of cylinders.
Abstract: 
In an exhaust system, a first oxygen sensor (S1) is attached to an exhaust pipe (101) connected to a standard cylinder in which the amount of injected fuel is the closest to the average of the amounts of fuel injected in a plurality of cylinders. A controller calculates the air-fuel ratio of the standard cylinder based on the value detected by the first oxygen sensor (S1). Then, based on the difference between the calculated air-fuel ratio of the standard cylinder and a predetermined target air-fuel ratio, the amount of correction to the amount of fuel injected in the standard cylinder is determined such that the air-fuel ratio of the standard cylinder is equal to the target air-fuel ratio. Furthermore, based on the amount of correction to the amount of fuel injected in the standard cylinder, the amounts of correction of the other cylinders are determined.

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Exhaust passage structure of multi-cylinder engine

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Exhaust System and Saddle-Ride Type Vehicle

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Exhaust system for motor vehicles

Hiroyuki Kikuchi, +6 more
TL;DR: An exhaust system for discharging exhaust gases through an exhaust passageway, emitted from a multi-cylinder combustion engine mounted on a motor vehicle includes a partition plate formed therein for dividing the exhaust passage into a plurality of juxtaposed exhaust passages and having a communicating hole defined therein, and an exhaust gas sensor positioned at a location in proximity of the communicating hole for detecting a composition of exhaust gases as mentioned in this paper.
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Exhaust system for motorcycle

Kenji Morita, +1 more
TL;DR: In this paper, a V engine with front and rear bank cylinders and a manifold pipe with front cylinders connected to the manifold pipe from the front side and an exhaust pipe extending backward from a rear face of the catalyst chamber is considered.
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Patent

Easily controlled exhaust pipe

Ming-Tien Chang
TL;DR: In this paper, an interior of a middle section of the manifold has a valve which is controlled by a controller, and the valve controls the area of the opening of the left branch tube communicated with the first muffler tube and the area from the right branch tube communicating with the second manifold tube.
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Exhaust manifold, for internal combustion engine, for improving durability of oxygen sensor at merging portion of exhaust manifold

Shigeki Sugiura, +2 more
TL;DR: In this article, an exhaust manifold comprising a plurality of exhaust pipes and a merging portion applies exhaust gas from each cylinder uniformly to an oxygen sensor in a merging part at low speed.
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Exhaust gas purifier

Hirayama Hiroshi, +3 more
TL;DR: In this paper, two catalytic converters in series with each other in an exhaust passage and providing a bypass around the upstream converter so that exhaust gas flows through the bypass when the temperature of the gas is not lower than a prescribed level.
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Baffled catalytic converter

David Charles Weber, +1 more
TL;DR: In this article, a baffle is added to the inlet pipe and inlet volume of a catalytic converter to maintain separation between converging exhaust gas streams entering into the catalytic converters material.
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Exhaust arrangement for internal combustion engine

Kawamizu Kiyomi
TL;DR: In this paper, an exhaust arrangement for a multi-cylinder internal combustion engine with a row of cylinders (C1-C4) is presented, where an exhaust manifold (2) including a branch portion (8) having a plurality of branch pipes (7A-7D) corresponding to the cylinders, a catalyst (4) disposed downstream of the exhaust manifold, and an exhaust pipe (3) connecting the exhaust manifolds to the catalyst is defined.