Work vehicle-mounted engine device

1. A work vehicle-mounted engine device comprising:

an engine mounted on a machine body and covered with a hood;

an air cleaner for cleaning air introduced into the engine; and

an exhaust gas cleaning device for cleaning exhaust gas from an exhaust manifold of the engine; and

wherein a cooling fan is arranged on one side portion of the engine;

wherein a flywheel housing is fitted to an other side portion of the engine opposite to the one side portion where the cooling fan is arranged;

wherein a support body is fitted on an upper portion of the flywheel housing;

wherein the exhaust gas cleaning device is fitted on the flywheel housing via the support body;

wherein a filter support body is provided on an outer peripheral side of the exhaust gas cleaning device so as to support the exhaust gas cleaning device, and an inlet tube is provided on the outer peripheral side of the exhaust gas cleaning device and connected so as to communicate with the exhaust manifold;

wherein the filter support body is affixed to an upper surface of the flywheel housing so as to position the exhaust gas cleaning device in a long position in a direction perpendicular to an output shaft of the engine; and

wherein the exhaust gas cleaning device comprises: a first gas cleaning filter contained in a first inner case; a second gas cleaning filter contained in a second inner case, the first and second gas cleaning filters for cleaning the exhaust gas and being of different types; and a first outer case and second outer case together containing the first and second inner cases, in which the first outer case contains the first the inner case and together with the second outer case contains the second inner case.

2. The work vehicle-mounted engine device as claimed in claim 1 , wherein the exhaust gas cleaning device is arranged close to a cylinder head of the engine.

3. The work vehicle-mounted engine device as claimed in claim 1 , wherein:

the air cleaner is arranged at a position lower than an upper surface of the engine and on one side of the engine; and

the exhaust gas cleaning device is arranged on an other side of the engine.

4. The work vehicle-mounted engine device as claimed in claim 1 , wherein a structure in which the engine and a counter weight to achieve a weight balance of a work vehicle are arranged on a turning machine body rotatable around a vertical axis and in which an exhaust gas pipe is made to communicate with the exhaust gas cleaning device, and an exhaust outlet side of the exhaust gas pipe is faced to a through hole formed in the counter weight.

5. The work vehicle-mounted engine device as claimed in claim 1 , wherein a structure in which the engine and a counter weight as a weight balancer of a work vehicle are arranged on a turning machine body rotatable around a vertical axis and in which an exhaust gas pipe is made to communicate with the exhaust gas cleaning device, and an exhaust port side of the exhaust gas pipe is passed through a through hole formed in the counter weight.

6. The work vehicle-mounted engine device as claimed in claim 1 , wherein a work vehicle structure in which a chassis for forming an engine room is fitted in the hood and in which an outer peripheral side of the engine is surrounded by the chassis for forming an engine room, and the air cleaner and the exhaust gas cleaning device are arranged in an engine room space surrounded by the chassis at positions separate from an upper surface of the engine.

7. The work vehicle-mounted engine device as claimed in claim 1 , wherein a battery for supplying electric power is arranged below an engine cooling radiator and on a side of a radiator drain, the engine cooling radiator being arranged opposite to the cooling fan in the hood.

8. The work vehicle-mounted engine device as claimed in claim 1 , wherein a controller for controlling an operation of a turning work vehicle is arranged in the hood and above the cooling fan.