# US 2016/0251997 A1 · Engine device for work vehicle

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2016/0251997 A1
- Document ID: US20160251997A1
- Status: Published application
- Kind: A1
- Application number: 15/030,704
- Filed: 2014-10-22
- Published: 2016-09-01
- Earliest claimed: 2013-10-28
- Assignees: Yanmar Co., Ltd.
- Applicants: Yanmar Co., Ltd.
- Inventors: Yoshiyuki SANDOU
- Web page: https://patentgrep.com/patent/US20160251997A1

## CPC

- F01N 13/08: Other arrangements or adaptations of exhaust conduits {(pipes, joints or supports therefor in general F16L; collecting or removing exhaust gases of vehicle engines in workshops B08B15/00, on highways E01C1/005)}
- F01N 3/021: by means of filters
- F01N 3/035: with catalytic reactors
- F01N 3/106: {Auxiliary oxidation catalysts}
- F01N 3/2066: {Selective catalytic reduction [SCR]}
- F01N 3/24: characterised by constructional aspects of converting apparatus (filtering in combination with catalytic reactors F01N3/035)
- F01N 13/009: {having two or more separate purifying devices arranged in series}
- F01N 13/1822: {for fixing exhaust pipes or devices to vehicle body}
- F01N 13/1855: {the connection being realised by using bolts, screws, rivets or the like}
- F01N 13/0097: {the purifying devices are arranged in a single housing}
- F01N 2250/02: filtering and catalytic conversion
- F01N 2570/14: Nitrogen oxides
- F01N 2590/08: for heavy duty applications, e.g. trucks, buses, tractors, locomotives
- F01N 2610/02: the substance being ammonia or urea
- Y02A 50/20: Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02T 10/12: Improving ICE efficiencies
- F01N: GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16)
- Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

An engine device for a work vehicle, in which an exhaust purification unit can be placed on an engine in the neighborhood of the final process in the assembly work of the engine, thereby improving the assembly workability of the engine. The engine device includes a first case that removes particulate matter in the exhaust gas of the engine and a second case that removes nitrogen oxides in the exhaust gas of the engine and connects the first case to the second case via a urea mixing pipe. The first case and the second case are integrally adhered by means of clamping bodies, and, thereby forming an exhaust purification unit, and the exhaust purification unit is configured to be supported by the engine via the clamping bodies, and in a detachable manner.

## Claims

### Claim 1

An engine device for a work vehicle, the engine device configured to include a first case for removing particulate matter in exhaust gas of an engine and a second case for removing nitrogen oxides in the exhaust gas of the engine, and configured to connect the first case to the second case via a urea mixing pipe, comprising:
wherein the first case and the second case are integrally adhered by means of a clamping body, thereby forming an exhaust purification unit, and
wherein the exhaust purification unit is configured to be supported by the engine via the clamping body in a detachable manner.

### Claim 2 (depends on 1)

The engine device for the work vehicle according to claim 1,
wherein a supporting stand is approximately horizontally adhered on an upper surface side of the engine, and the clamping body is adhered on an upper surface side of the supporting stand, and the first case and the second case are supported in a sideways posture on the upper surface side of the engine via the clamping body, and the urea mixing pipe is configured to be supported between the first case and the second case on the upper surface side of the first case and the second case.

### Claim 3 (depends on 1)

The engine device for the work vehicle according to claim 1,
wherein a lower end side of a plurality of supporting leg bodies is adhered to an outer circumferential surface of a cylinder head of the engine, and an approximately horizontal supporting stand is coupled on an upper end side of the plurality of supporting leg bodies in a detachable manner, and the exhaust purification unit is configured to be placed on the upper surface side of the engine via the supporting stand.

### Claim 4 (depends on 3)

The engine device for the work vehicle according to claim 3,
wherein the exhaust purification unit is supported within a width of the engine in a core-line direction of an output shaft of the engine via the supporting stand, and a direction intersecting with a core line of the output shaft of the engine is configured to correspond to a transfer direction of the exhaust gas in the first case or the second case.

### Claim 5 (depends on 1)

The engine device for the work vehicle according to claim 1, further comprising: a supporting leg body installed in such a manner as to protrude from the engine; and a supporting stand adhered to the supporting leg body, and
wherein the first case and the second case are configured to be mounted on a plane surface of the supporting stand.

### Claim 6 (depends on 5)

The engine device for the work vehicle according to claim 5,
wherein a plane surface of the supporting stand is brought in surface contact with a horizontal surface of an exhaust gas outlet portion on an outer side surface of the engine, and the supporting stand is joined with the outer side surface of the engine via a horizontal surface on an outside of the engine and the plane surface of the supporting stand, and when the supporting stand is fixed on the supporting leg body, the upper surface side of the supporting stand is configured to be approximately horizontal.

### Claim 7 (depends on 5)

The engine device for the work vehicle according to claim 5,
wherein a positioning body is integrally fixed on the supporting stand, and the positioning body is brought in surface contact with an opening surface of an exhaust gas outlet portion of the engine, and the supporting stand is joined on a side of the engine via the positioning body, and the upper surface side of the supporting stand is configured to be approximately horizontal.

### Claim 8 (depends on 6)

The engine device for the work vehicle according to claim 6,
wherein regarding structure in which the first case and the second case are integrally constituted as an exhaust purification unit, the exhaust purification unit is configured to be integrally attached or detached on the flat upper surface side of the supporting stand whose lower surface side is adhered to the supporting leg body.

### Claim 9 (depends on 1)

The engine device for the work vehicle according to claim 1, further comprising: a plurality of case fixing bodies for fixing the first case and the second case; and supporting frame bodies for adhering to the plurality of case fixing bodies, and
wherein the case fixing bodies and the supporting frame bodies are configured to be coupled in such a manner that a mounting position can be adjusted, and
wherein a posture of an exhaust gas inlet portion of the first case is configured to be capable of adjusting with respect to a mounting surface of the engine.

### Claim 10 (depends on 9)

The engine device for the work vehicle according to claim 9,
wherein the exhaust purification unit is formed of each of the cases, the case fixing bodies, and the supporting frame bodies, and a lower end side of a plurality of supporting leg bodies is adhered to an outer side surface of a cylinder head of the engine, and the supporting frame bodies are coupled on an upper end side of the plurality of supporting leg bodies.

### Claim 11 (depends on 9)

The engine device for the work vehicle according to claim 9,
wherein a supporting stand is arranged approximately horizontally on an upper surface side of the engine via a plurality of supporting leg bodies, and the supporting frame bodies are adhered on an upper surface side of the supporting stand.

### Claim 12 (depends on 11)

The engine device for the work vehicle according to claim 11,
wherein part of the lower surface side of the supporting stand is brought in surface contact with part of an exhaust gas outlet surface of the engine, and the supporting stand is configured to be fixed on the engine in a horizontal posture with the exhaust gas outlet surface of the engine as a reference.