JP5707289B2 - Engine with exhaust treatment device - Google Patents

Description

  The present invention relates to an engine with an exhaust treatment device, and more particularly to an engine with an exhaust treatment device that can reduce the installation space of a bracket to which a connector is attached.

Conventionally, as an engine with an exhaust treatment device, there is one in which an exhaust treatment device is attached to an engine body (see, for example, Patent Document 1).
According to this type of engine, there is an advantage that the exhaust treatment device is integrated with the engine body, and the exhaust treatment device can be easily installed in the engine-equipped machine.
In this type of engine, a plurality of sensors are arranged in the exhaust treatment device, a wire harness is led out from each of the plurality of sensors, a sensor-side connector is provided at each lead-out end portion of each wire harness, and each sensor-side connector is respectively connected When connecting to the engine ECU side connector, a bracket is attached to the engine body, a plurality of connector attachment pieces arranged in the length direction are provided on the bracket, the connector attachment pieces are arranged at the same height, and the engine ECU side connector and A problem arises when any one of the sensor-side connectors is attached to each connector attachment piece.

JP 2010-71175 A (see FIG. 15)

<Problem> Installation space for the bracket to which the connector is attached increases.
A bracket is attached to the engine body, and a plurality of connector attachment pieces arranged in the longitudinal direction are provided on the bracket. The connector attachment pieces are arranged at the same height, and either one of the engine ECU side connector and the sensor side connector is provided. When one connector is attached to each connector mounting piece, in order to avoid mutual interference between adjacent connectors, the distance in the front-rear direction of the connector cannot be reduced, and the length in the front-rear direction of the bracket becomes longer. The installation space becomes larger.

  An object of the present invention is to provide an engine with an exhaust treatment device that can reduce the installation space of a bracket to which a connector is attached.

(Invention-specific matters common to the inventions of claims 1 and 3)
As illustrated in FIGS. 4 to 7, an exhaust treatment device (2) is attached to the engine body (1), and a plurality of sensors (3), (4) and (5) are arranged in the exhaust treatment device (2). An engine with an exhaust treatment device,
As illustrated in FIGS. 4 to 7, wire harnesses (3a), (4a), and (5a) are derived from the plurality of sensors (3), (4), and (5), respectively, and the wire harnesses (3a), (4a) ( Sensor-side connectors (3b), (4b) and (5b) are provided at the lead-out ends of 5a), and the sensor-side connectors (3b), (4b) and (5b) are connected to the engine ECU-side connectors (3c), (4c) and (5c), respectively. )
As illustrated in FIGS. 1 to 3, a bracket (6) is attached to the engine body (1), and a plurality of connector attachment pieces (3d) (4d) (5d) arranged in the front-rear direction are attached to the bracket (6). The connector mounting pieces (3d), (4d), and (5d) are arranged in steps different in height, and the engine ECU side connectors (3c) (4c) (5c) and the sensor side connectors (3b) (4b) ( 5b), one of the connectors (3c), (4c) and (5c) is attached to each connector mounting piece (3d), (4d) and (5d),
As illustrated in FIG. 2, the front and rear end edges (4e) and (5e) of the connectors (4c) and (5c) respectively attached to adjacent connector mounting pieces (4d) and (5d) overlap each other when viewed from directly above. I did it.
(Invention-specific matters specific to the invention of claim 1)
As illustrated in FIGS. 1 to 3, the bracket (6) is provided with a wire harness attachment wall (7), and the wire harness attachment wall (7) is connected to a plurality of connector attachment pieces (3d) (4d) (5d). A plurality of sensors (3), (4) and (5) are placed on the inward surface (7a) of the wire harness mounting wall (7) facing the connector mounting pieces (3d), (4d) and (5d) along the arrangement direction. The led wire harnesses (3a), (4a), and (5a) are bound and attached by clamps (8) and (9), and the outward surface (7b) of the wire harness attachment wall (7) is placed above the exhaust manifold (10). An engine with an exhaust treatment device, characterized by being along the space (11).
(Invention-specific matters specific to the invention of claim 3 )
As illustrated in FIGS. 1 and 3, among the plurality of connector mounting pieces (3d), (4d) and (5d), the connector mounting piece (5d) at one end in the front-rear direction is connected to the other connector mounting pieces (3d) (4d). The engine suspension bracket (12) is provided at the front and rear ends of the engine body (1) at the position adjacent to the lowest connector mounting piece (5d), and the engine suspension bracket (12). An engine with an exhaust treatment device, wherein the lifting hook engaging portion (12a) is disposed obliquely above the lowest connector mounting piece (5d).

(Invention of Claim 1)
The invention according to claim 1 has the following effects.
<< Effect 1-1 >> The installation space of the bracket for attaching the connector can be reduced.
As illustrated in FIG. 2, the front and rear end edges (4e) and (5e) of the connectors (4c) and (5c) respectively attached to adjacent connector mounting pieces (4d) and (5d) overlap each other when viewed from directly above. Since it did in this way, the distance of the front-back direction of a connector (4c) (5c) can be packed up and arrange | positioned in a bracket (6), without producing mutual interference of adjacent connectors (4c) (5c), The dimension of the bracket (6) in the front-rear direction can be shortened, and the installation space for the bracket (6) can be reduced.

<< Effect 1-2 >> Connectors and wire harnesses can be protected from hot air that floats above the exhaust manifold.
As illustrated in FIGS. 1 to 3, since the outward surface (7 b) of the wire harness mounting wall (7) is placed along the space (11) above the exhaust manifold (10), the exhaust manifold (10) The hot air that rises in the space (11) above is blocked by the wire harness mounting wall (7), and the wires (3a), (4a), (5a) of the sensors (3), (4), (5) and the engine ECU side The connectors (3c), (4c), (5c) and the sensor side connectors (3b), (4b), (5b) can be protected from the hot air floating above the exhaust manifold (10).

(Invention of Claim 2 )
The invention according to claim 2 has the following effect in addition to the effect of the invention according to claim 1 .
< Effect 2> While avoiding mutual interference between the engine lifting hook and the connector, the height of the engine lifting bracket can be lowered.
As illustrated in FIGS. 1 and 3, an engine suspension bracket (12) is provided at the front and rear ends of the engine body (1) at a position adjacent to the lowest connector mounting piece (5d), and the engine suspension bracket (12). Since the lifting hook engaging portion (12a) provided on the lower side of the lowest connector mounting piece (5d) is disposed on the lower side of the engine lifting bracket (12), the adjacent lifting crane can be lifted. The hook and the connector (5c) adjacent to the hook can be separated from each other up and down, and the back of the engine suspension bracket (12) can be attached while avoiding mutual interference between the lifting hook of the crane for lifting the engine and the connector (5c). Can be lowered.
(Invention of Claim 3)
The invention according to claim 3 has the “effect 1-1” of the invention according to claim 1 and the “effect 2” of the invention according to claim 2.

It is a perspective view of the bracket used with the engine with an exhaust treatment device concerning the embodiment of the present invention, and its peripheral parts. It is a top view of the bracket of FIG. 1 and its peripheral components. It is a rear view of the bracket of FIG. 1 and its peripheral parts. 1 is a perspective view of an engine with an exhaust treatment device according to an embodiment of the present invention. It is a top view of the engine of FIG. It is a rear view of the engine of FIG. It is a side view of the engine of FIG.

  1 to 7 are views for explaining an engine with an exhaust treatment device according to an embodiment of the present invention. In this embodiment, a water-cooled vertical in-line multi-cylinder diesel engine with an exhaust treatment device will be explained.

As shown in FIGS. 4 to 7, an exhaust treatment device (2) is attached to the engine body (1), and a plurality of sensors (3), (4) and (5) are arranged on the exhaust treatment device (2). .
The engine body (1) is configured as follows.
As shown in FIG. 7, a cylinder head (16) is assembled to the upper part of the cylinder block (15), a cylinder head cover (17) is assembled to the upper part of the cylinder head (16), and cooling water is attached to the front part of the cylinder block (15). A pump (18) and an engine cooling fan (19) are arranged, a flywheel housing (20) is assembled to the rear of the cylinder block (15), and an oil pan (21) is assembled to the lower part of the cylinder block (15). .
As shown in FIG. 5, the intake manifold (22) is assembled on one side of the cylinder head (16), the exhaust manifold (10) is assembled on the other side, and the upper part of the exhaust manifold (10) is supercharged. Machine (23) is assembled.
As shown in FIG. 6, fuel is supplied from a fuel supply pump (24) to a common rail (32), accumulated in the common rail (32), and pumped from the common rail (32) to an injector (not shown). A predetermined amount is injected into the combustion chamber at a predetermined timing by opening and closing.

As shown in FIG. 6, the exhaust treatment device (2) is attached to the upper part of the flywheel housing (20) via a stay (25).
As shown in FIG. 5, the exhaust treatment device (2) accommodates a DOC (26) and a DPF (27) therein, and converts PM in the exhaust discharged from the supercharger (23) into the DPF (27). When the PM accumulation estimated value of the DPF (27) reaches a predetermined regeneration required value, unburned fuel is supplied into the exhaust by post injection, and this unburned fuel is catalytically burned by the DOC (26). The exhaust temperature is raised, PM deposited on the DPF (27) is removed by incineration, and the DPF (27) is regenerated.
DOC is an abbreviation for diesel oxidation catalyst, DPF is an abbreviation for diesel particulate filter, and PM is an abbreviation for particulate matter.

As shown in FIG. 5, a plurality (three) of sensors (3), (4) and (5) arranged in the exhaust treatment device (2) are connected to the DOC upstream exhaust temperature sensor (3 ), A DPF upstream exhaust temperature sensor (4) between the DOC (26) and the DPF (27), and a DPF downstream exhaust temperature sensor (5) downstream of the DPF (27).
These sensors (3), (4), and (5) are connected to an engine ECU (not shown), send exhaust temperature information to the engine ECU, and the engine ECU estimates PM accumulation in the DPF (27) based on the exhaust temperature information. Value calculation processing and DPF (27) regeneration processing are performed.
Engine ECU is an abbreviation for engine electronic control unit.

  As shown in FIGS. 4 to 7, wire harnesses (3a), (4a) and (5a) are derived from a plurality (three) of sensors (3), (4) and (5), respectively, and each wire harness (3a) ( Sensor side connectors (3b), (4b) and (5b) are provided at the lead-out ends of 4a) and (5a), and the sensor side connectors (3b), (4b) and (5b) are connected to the engine ECU side connectors (3c) and (4c), respectively. ) (5c).

  As shown in FIGS. 1 to 3, a bracket (6) is attached to the engine body (1), and a plurality (three) of connector attaching pieces (3d) (4d) (4) arranged in the front-rear direction on the bracket (6). 5d), and the connector mounting pieces (3d), (4d) and (5d) are arranged in steps different in height, and the engine ECU side connectors (3c), (4c) and (5c) and the sensor side connector (3b) ( One of the connectors (4c) and (5c) of 4b and 5b is attached to each of the connector attachment pieces (3d), (4d), and (5d).

As shown in FIGS. 1 to 3, in this embodiment, the engine ECU side connectors (3c), (4c), and (5c) are respectively attached to the connector mounting pieces (3d), (4d), and (5d).
As shown in FIG. 3, the bracket (6) is attached to the cylinder head cover (17). As shown in FIG. 1 and FIG. 3, among the plurality (three) of connector mounting pieces (3d), (4d) and (5d), the frontmost connector mounting piece (3d) is the highest and the rearmost connector mounting The piece (5d) is made the lowest, and the middle connector mounting piece (4d) in the front-rear direction is arranged at the middle height in the up-down direction.
As shown in FIG. 1, the engine ECU side connectors (3c), (4c) and (5c) are provided. The engine ECU side connector (3c) connected to the connector (3b) of the DOC upstream side exhaust temperature sensor (3) in order from the front, and the engine ECU side connector (4b) connected to the connector (4b) of the DPF upstream side exhaust temperature sensor (4) 4c) an engine ECU side connector (5c) connected to the connector (5b) of the DPF downstream side exhaust temperature sensor (5), the frontmost engine ECU side connector (3c) being at the highest position, and the rearmost The engine ECU side connector (5c) is at the lowest position, and the middle ECU side connector (4c) in the front-rear direction is disposed at the middle height in the vertical direction.
As shown in FIG. 4, the wire harnesses respectively led out from the engine ECU side connectors (3c), (4c) and (5c) are bundled and connected together to the lead-out connector (28) arranged at these lead-out ends. ing. This lead-out connector (28) is attached to the engine body (1) via a bracket (29). A harness connector (not shown) led out from the engine ECU is connected to the lead-out connector (28).

As shown in FIG. 2, when viewed from directly above, the front and rear end edges (4e) and (5e) of the connectors (4c) and (5c) attached to the adjacent connector attachment pieces (4d and 5d) overlap each other. ing.
That is, the rear end edge (4e) of the connector (4c) of the DPF upstream exhaust temperature sensor (4) at the middle position in the front-rear direction and the front end edge of the connector (5c) of the rearmost DPF downstream exhaust temperature sensor (5) (5e) They are made to overlap each other.

  As shown in FIGS. 1 to 3, a wire harness mounting wall (7) is provided on the bracket (6), and the wire harness mounting wall (7) is connected to a plurality (three) of connector mounting pieces (3 d, 4 d) ( 5d), a plurality of sensors (3), (4) (on the inward surface (7a) of the wire harness mounting wall (7) facing the connector mounting pieces (3d) (4d) (5d). 5) The wire harnesses 3a, 4a and 5a derived from 5) are attached by being bound by clamps 8 and 9 and the outward face 7b of the wire harness mounting wall 7 is connected to the exhaust manifold 10 Along the space (11) above.

As shown in FIG. 4, as shown in FIG. 1, a pair of clamps (8) and (9) are provided at the front and rear, and the front wire clamp (8) has three wire harnesses (3a) (4a) (5a). The straight portions of the wire harness (4a) and the straight portion of the wire harness (3a) are bound to the rear clamp (9). The space (11) above the exhaust manifold (10) is directly above the exhaust manifold (10).
As shown in FIG. 1, the bracket (6) is formed by bending a wire harness mounting wall (7) perpendicular to the left and right side edges of the bottom plate (29) upward and forming a vertical connector support wall (right and left side edges). 30) is bent upward, and horizontal connector mounting pieces (3d) (4d) (5d) are bent horizontally from the connector support wall (30) toward the opposite side of the wire harness mounting wall (7). doing. There are a total of three connector mounting pieces (3d) (4d) (5d).

As shown in FIGS. 1 and 3, among a plurality (three) of connector attachment pieces (3d), (4d) and (5d), the connector attachment piece (5d) at one end in the front-rear direction is replaced with another connector attachment piece (3d). ) (4d), and at the position adjacent to the lowest connector mounting piece (5d), an engine suspension bracket (12) is provided at the front and rear ends of the engine body (1), and the engine suspension bracket (12) The lifting hook engaging portion (12a) provided on the lower connector attaching piece (5d) is disposed obliquely above.
That is, the frontmost connector mounting piece (3d) is the highest and the rearmost connector mounting piece (5d) is the lowest, and an engine suspension bracket (12) is provided at the rear end of the engine body (1). ing. The lifting hook locking portion (12a) is a hook locking hole opened in the engine hanging bracket (12).
An engine suspension bracket (31) is also arranged at the front end of the engine body (1).

(1) Engine body
(2) Exhaust treatment equipment
(3) Sensor
(3a) Wire harness
(3b) Sensor side connector
(3c) Engine ECU side connector
(3d) Connector mounting piece
(4) Sensor
(4a) Wire harness
(4b) Sensor side connector
(4c) Engine ECU side connector
(4d) Connector mounting piece
(4e) Front and rear end edges
(5) Sensor
(5a) Wire harness
(5b) Sensor side connector
(5c) Engine ECU side connector
(5d) Connector mounting piece
(5e) Front and rear end edges
(6) Bracket
(7) Wire harness mounting wall
(7a) Inward surface
(7b) Outward surface
(8) Clamp
(9) Clamp
(10) Exhaust manifold
(11) Space just above the exhaust manifold
(12) Engine suspension bracket
(12a) Lifting hook locking part

Claims (3)

An engine with an exhaust treatment device in which an exhaust treatment device (2) is attached to the engine body (1), and a plurality of sensors (3), (4) and (5) are arranged on the exhaust treatment device (2),
Wire harnesses (3a), (4a), and (5a) are led out from a plurality of sensors (3), (4), and (5), respectively, and sensor-side connectors are connected to lead-out ends of the wire harnesses (3a), (4a), and (5a), respectively. (3b) (4b) (5b) are provided, and each sensor side connector (3b) (4b) (5b) is connected to the engine ECU side connector (3c) (4c) (5c).
A bracket (6) is attached to the engine body (1), and a plurality of connector attachment pieces (3d) (4d) (5d) arranged in the front-rear direction are provided on the bracket (6). The connector attachment pieces (3d) (4d) ) (5d) are arranged in steps different in height, and either one of the engine ECU side connectors (3c) (4c) (5c) and the sensor side connectors (3b) (4b) (5b) ( 3c), (4c) and (5c) are attached to the respective connector mounting pieces (3d), (4d) and (5d),
When viewed from directly above, the front and rear end edges (4e) and (5e) of the connectors (4c) and (5c) attached to the adjacent connector attaching pieces (4d and 5d) are overlapped with each other ,
A wire harness mounting wall (7) is provided on the bracket (6), and the wire harness mounting wall (7) is arranged along the arrangement direction of the plurality of connector mounting pieces (3d) (4d) (5d), so that the connector mounting piece (3d ) (4d) Wire harness (3a) (4a) (4a) (4a) (4a) (5a) led out from a plurality of sensors (3) (4) (5) on the inward surface (7a) of the wire harness mounting wall (7) 5a) is bound and attached with clamps (8) and (9), and the outward surface (7b) of the wire harness mounting wall (7) is placed along the space (11) above the exhaust manifold (10). Features an engine with an exhaust treatment device. The engine with an exhaust treatment device according to claim 1 ,
Among the plurality of connector mounting pieces (3d), (4d) and (5d), the connector mounting piece (5d) at one end in the front-rear direction is made lower than the other connector mounting pieces (3d) (4d), and the lowest connector At the position adjacent to the mounting piece (5d), the engine suspension bracket (12) is provided at the front and rear ends of the engine body (1), and the lifting hook locking portion (12a) provided on the engine suspension bracket (12) is the lowest. An engine with an exhaust treatment device, which is disposed obliquely above a connector mounting piece (5d). An engine with an exhaust treatment device in which an exhaust treatment device (2) is attached to the engine body (1), and a plurality of sensors (3), (4) and (5) are arranged on the exhaust treatment device (2),
  Wire harnesses (3a), (4a), and (5a) are led out from a plurality of sensors (3), (4), and (5), respectively, and sensor-side connectors are connected to lead-out ends of the wire harnesses (3a), (4a), and (5a), respectively. (3b) (4b) (5b) are provided, and each sensor side connector (3b) (4b) (5b) is connected to the engine ECU side connector (3c) (4c) (5c).
  A bracket (6) is attached to the engine body (1), and a plurality of connector attachment pieces (3d) (4d) (5d) arranged in the front-rear direction are provided on the bracket (6). The connector attachment pieces (3d) (4d) ) (5d) are arranged in steps different in height, and either one of the engine ECU side connectors (3c) (4c) (5c) and the sensor side connectors (3b) (4b) (5b) ( 3c), (4c) and (5c) are attached to the respective connector mounting pieces (3d), (4d) and (5d),
  When viewed from directly above, the front and rear end edges (4e) and (5e) of the connectors (4c) and (5c) attached to the adjacent connector attaching pieces (4d and 5d) are overlapped with each other,
Among the plurality of connector mounting pieces (3d), (4d) and (5d), the connector mounting piece (5d) at one end in the front-rear direction is made lower than the other connector mounting pieces (3d) (4d), and the lowest connector At the position adjacent to the mounting piece (5d), the engine suspension bracket (12) is provided at the front and rear ends of the engine body (1), and the lifting hook locking portion (12a) provided on the engine suspension bracket (12) is the lowest. An engine with an exhaust treatment device, which is disposed obliquely above a connector mounting piece (5d).

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