Back to results
US 9,441,513 B2Granted
Exhaust gas purification device
AssigneeYanmar Co., Ltd.
InventorsMasataka Mitsuda, Hiroshi Uehara
Life of this patent
Estimating the term…
Abstract
An exhaust gas purification device capable of enhancing handling operability such as maintenance of an engine includes two gas purification bodies which purify exhaust gas discharged from the engine, inner cases in which the gas purification bodies are incorporated, and outer cases in which the inner cases are incorporated. The outer cases are arranged side by side in a moving direction of exhaust gas and connected to each other. One of the adjoining inner cases is inserted into the other inner case to form a double-layer structure. A loosely-fitting gap is formed between an inner side surface of the one inner case and an outer side surface of the other inner case.
Claims11
An exhaust gas purification device comprising:
- two gas purification bodies for purifying exhaust gas discharged from an engine;
- inner cases for incorporating the gas purification bodies;
- outer cases for incorporating the inner cases, the outer cases being arranged side by side in an exhaust gas moving direction and connected to each other, wherein one of the adjoining inner cases is inserted into the other inner case to form a double-layer structure, and a loosely-fitting gap is formed between an inner side surface of the one inner case and an outer side surface of the other inner case;
- and
- an exhaust gas inlet pipe that receives exhaust gas flowing in from the engine, and an exhaust gas outlet pipe through which the exhaust gas flows out after passing through the gas purification bodies,
- wherein an upward-facing opening of the exhaust gas inlet pipe is fixed to an outer side surface of the outer case that is for the catalyst such that a rectangular upwardly opening end which is on a large diameter side covers an exhaust gas inflow opening, and extends in a longitudinal direction of said outer case for the catalyst, and a downward-facing opening, which serves as an exhaust gas receiving side, opens onto an edge close to a longitudinal middle portion of said outer case in the exhaust gas inlet pipe, so that an exhaust gas introducing passage is formed by the outer side surface of an exhaust gas upstream side outer case and the inner side surface of the exhaust gas inlet pipe.
3 more elements
An exhaust gas purification device comprising:
- two gas purification bodies for purifying exhaust gas discharged from an engine;
- inner cases for incorporating the gas purification bodies;
- outer cases for incorporating the inner cases, the outer cases being arranged side by side in an exhaust gas moving direction and connected to each other, wherein one of the adjoining inner cases is inserted into the other inner case to form a double-layer structure, and a loosely-fitting gap is formed between an inner side surface of the one inner case and an outer side surface of the other inner case;
- and
- an exhaust gas introducing passage is formed by the outer side surface of the exhaust gas upstream side outer case and the inner side surface of the exhaust gas inlet pipe,
- wherein the exhaust gas inlet pipe is mounted on an exhaust as upstream side outer case, a first rectifier is provided on an outer side surface of the exhaust gas upstream side outer case, and a second rectifier is provided on the inner side surface of the exhaust gas inlet pipe, the first rectifier being located on an exhaust gas upstream side, and the second rectifier being located on an exhaust gas downstream side.
3 more elements
An exhaust gas purification device comprising:
- two gas purification bodies for purifying exhaust gas discharged from an engine;
- inner cases for incorporating the gas purification bodies;
- outer cases for incorporating the inner cases, the outer cases being arranged side by side in an exhaust gas moving direction and connected to each other, wherein one of the adjoining inner cases is inserted into the other inner case to form a double-layer structure, and a loosely-fitting gap is formed between an inner side surface of the one inner case and an outer side surface of the other inner case;
- and
- an exhaust gas inlet pipe for exhaust gas from the engine flowing into, and an exhaust gas outlet pipe for exhaust gas passing through the gas purification body flowing out,
- wherein the exhaust gas inlet pipe is mounted on an exhaust gas upstream side outer case such that an exhaust gas introducing passage is formed by the outer side surface of the exhaust gas upstream side outer case and the inner side surface of the exhaust gas inlet pipe, and at least one of the outer side surface of the exhaust gas upstream side outer case and the inner side surface of the exhaust gas inlet pipe is provided with a rectifier which rectifies a flow of exhaust gas, and
- wherein the rectifier is provided on each of the outer side surface of the exhaust gas upstream side outer case and the inner side surface of the exhaust gas inlet pipe, the rectifier of the outer case is located on an exhaust gas upstream side, and the rectifier of the exhaust gas inlet pipe is located on an exhaust gas downstream side.
4 more elements
Dependencies are inferred from the claim text.