Engine device

1. An engine device comprising:

a post-treatment device provided in an exhaust passage of an engine, the post-treatment device configured to purify an exhaust gas from the engine; and

a filter case disposed, in a replaceable manner separate from the post-treatment device, upstream of the post-treatment device in the exhaust passage, the filter case is at both ends thereof respectively provided with connecting flanges and includes a filter body configured to catch deposits in the exhaust gas;

an oil pan coupled to the post-treatment device via a fixing bracket, wherein:

one of the connecting flanges is connected to a flange of an exhaust gas introduction pipe; and

another of the connecting flanges is connected to a flange of an exhaust gas inlet of the post-treatment device.

2. The engine device according to claim 1 , further comprising:

a temperature detecting member provided upstream of the filter body, the temperature detecting member being configured to detect a temperature of the exhaust gas, wherein

a replacement timing of the filter body is determined based on a detection result from the temperature detecting member.

3. The engine device according to claim 1 , further comprising:

differential pressure detecting members between which the filter body is interposed, the differential pressure detecting members being configured to detect a pressure difference between an upstream side of the filter body and a downstream side of the filter body, wherein

a replacement timing of the filter body is determined based on a detection result from the differential pressure detecting members.

4. An engine device comprising:

a post-treatment device provided in an exhaust passage of an engine, the post-treatment device configured to purify an exhaust gas from the engine; and

a filter case disposed, in a replaceable manner separate from the post-treatment device, upstream of the post-treatment device in the exhaust passage, the filter case including:

a filter body configured to catch deposits in the exhaust gas;

a first connecting flange positioned at a first end of the filter case; and

a second connecting flange positioned at a second end of the filter case;

an exhaust gas introduction pipe disposed upstream of the filter case; and

an oil pan coupled to the post-treatment device via a fixing bracket, wherein:

the first connecting flange is connected to a downstream flange of the exhaust gas introduction pipe; and

the second connecting flange is connected to an upstream flange of an exhaust gas inlet of the post-treatment device.

5. The engine device according to claim 4 , wherein the post-treatment device further comprises:

a catalyst case;

an exhaust gas inlet pipe coupled to the catalyst case; and

an exhaust gas outlet pipe coupled to the catalyst case.

6. The engine device according to claim 5 , wherein:

the exhaust gas inlet pipe is positioned upstream of the catalyst case.

7. The engine device according to claim 5 , wherein:

the exhaust gas outlet pipe is positioned downstream of the catalyst case.

8. The engine device according to claim 4 , wherein the fixing bracket comprises:

a vertical plate fastened to a rear surface of the oil pan; and

a horizontal plate fastened to a bottom surface of the post-treatment device.

9. The engine device according to claim 4 , wherein the post-treatment device is configured to be positioned between a rear surface of a cylinder block and a rear portion of a top surface of the oil pan.

10. The engine device according to claim 4 , further comprising:

an exhaust manifold configured to receive the exhaust gas of the engine; and

wherein the post-treatment device is disposed between the exhaust manifold and the oil pan.