JP2015190315A - Engine device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an engine device enabled to open the upper face side or the side face of an engine 1 largely and to improve the maintenance workability of the upper face side or the side face of the engine 1.SOLUTION: An engine device comprises: a first case 28 for removing a particulate substance in the exhaust gas of the engine 1; and a second case 29 for removing a nitrogen oxide substance in the exhaust gas of the engine 1. The second case 29 is connected to the first case 28 through a urea mixer tube 35. The engine device further comprises a support base 45 for fixing the first case 28, the second case 29 and the urea mixer tube 35 in parallel. The first case 28, the second case 29 and the urea mixer tube 35 are integrally provided on the support base 45 thereby to form an exhaust emission control system 27 of a single part structure, and the exhaust emission control system 27 is attached to support leg bodies 46 protruded downward from the lower face side of the engine 1.

Description

  The present invention relates to an engine device mounted on a cargo transportation container or the like. More specifically, the present invention is applied to an engine that is mounted on, for example, a freight container or various vehicles, and drives a refrigeration / refrigeration air conditioner, an in-vehicle temperature control device, or a power generation device. In addition, the present invention relates to an engine device equipped with an exhaust gas purification device that removes particulate matter (soot, particulates) contained in exhaust gas or nitrogen oxides (NOx) contained in exhaust gas. is there.

  Conventionally, a diesel particulate filter case (hereinafter referred to as a DPF case) and a urea selective reduction catalyst are provided as exhaust gas purifying devices (exhaust gas aftertreatment devices) in the exhaust path of a diesel engine. A technique is known in which a case (hereinafter referred to as an SCR case) is provided, exhaust gas is introduced into the DPF case and the SCR case, and the exhaust gas discharged from the diesel engine is purified (see, for example, Patent Documents 1 to 4). ). Furthermore, a container for transporting frozen cargo and the like is equipped with a refrigeration air conditioner and an engine that drives the air conditioner, and the container is kept at a temperature (for example, −20 ° C.) or less required for refrigeration storage of the cargo. There is also a technique for transporting cargo in a frozen state by maintaining the internal temperature and connecting the container to a tractor (Patent Document 5).

JP 2009-74420 A JP 2012-21505 A JP2013-104394A JP 2012-177233 A JP 2008-8516 A

  When assembling the DPF case and the SCR case apart from the engine, the temperature of the exhaust gas supplied from the engine to the DPF case or the SCR case decreases, and regeneration of the diesel particulate filter or selective catalytic reduction action, etc. Therefore, there is a problem that a special device for maintaining the temperature of the exhaust gas in the SCR case at a high temperature is required. There is also a technology for attaching the DPF case and the SCR case by attaching the DPF case and the SCR case to the two parallel base frames and fastening the two base frames to the object to be installed. Needs to be formed horizontally (flat), and there is a problem that it is difficult to support the support posture of the DPF case and the SCR case in a predetermined posture due to processing errors of mounting parts such as a base frame.

  On the other hand, when the DPF case and the SCR case are assembled close to the engine, the temperature drop of the exhaust gas supplied from the engine to the SCR case is reduced, and the temperature of the exhaust gas in the SCR case is easily maintained at a high temperature. In addition, it is necessary to secure an installation space for the SCR case on the side of the engine, and it is difficult to make the engine room compact and there is a problem that the DPF case or the SCR case cannot be supported compactly.

Furthermore, as in Patent Document 5, in the conventional technology in which a diesel engine as a drive source for an air conditioner or the like is mounted on a freight container, a DP is installed on the upper part of the diesel engine.
Although an F case and an SCR case can be provided, the installation space for the diesel engine cannot be easily reduced. In addition, since the outer dimensions of the freight shipping container are defined according to the purpose of use and the outer dimensions cannot be increased, there is a problem that the cargo loading capacity of the container needs to be reduced.

  In addition, when the cargo transport container is kept in operation for a long time, or when the container in operation is moved for a long distance, the engine is continuously operated for a long time in a relatively low speed rotation state. Since it is operated, there is a problem that the exhaust gas purification temperature of the exhaust gas purification device cannot be easily maintained above the temperature at which the exhaust gas can be continuously purified. When the engine is operated continuously for a long time, a large-capacity oil pan is necessary, but considering the oil pan molding cost, problems such as insufficient rigidity and easy conduction of engine vibration There is also.

  Accordingly, the present invention seeks to provide an engine device that has been improved by examining these current conditions.

  In order to achieve the above object, an engine device according to a first aspect of the present invention includes a first case for removing particulate matter in engine exhaust gas, and a second case for removing nitrogen oxides in the engine exhaust gas. An engine device comprising a case and connecting the second case to the first case via a urea mixing tube, further comprising a support base for fixing the first case, the second case, and the urea mixing tube in parallel, A case, a second case, and a urea mixing pipe are integrally disposed on a support base to form an exhaust gas purification device having a single-part structure, and a support leg projecting downward from the lower surface side of the engine. An exhaust gas purification device is attached.

  According to a second aspect of the present invention, in the engine device according to the first aspect, the exhaust gas purification device is attached in a posture in which the exhaust gas movement direction of the exhaust gas purification device intersects the output shaft of the engine. In addition, the upper end side of the support leg is fixed to the oil pan at the lower part of the engine, the lower end side of the support leg is protruded downward from the oil pan at the lower part of the engine, and the support base is provided at the lower end side of the support leg. Is attached in a detachable manner, and the exhaust gas purification device is attached.

  According to a third aspect of the present invention, in the engine device according to the first aspect, the exhaust gas purification device is placed in a posture in which the exhaust gas movement direction of the exhaust gas purification device is parallel to the output shaft of the engine. At the same time as mounting, the upper end side of the support leg is fixed to the oil pan below the engine, the lower end side of the support leg protrudes downward from the oil pan below the engine, and the support is supported on the lower end side of the support leg. A base is detachably fixed and the exhaust gas purification device is attached.

According to the first aspect of the present invention, the first case for removing particulate matter in the exhaust gas of the engine and the second case for removing nitrogen oxides in the exhaust gas of the engine are provided. In the engine device in which the second case is connected to the case via the urea mixing tube, the engine device includes a support base for fixing the first case, the second case, and the urea mixing tube in parallel, and the first case and the second case, The urea mixing pipe is integrally arranged on the support base to form an exhaust gas purification device having a single part structure, and the exhaust gas purification device is attached to a support leg projecting downward from the lower surface side of the engine. Therefore, the upper surface side or side surface of the engine can be largely opened, and the maintenance workability of the upper surface side or side surface of the engine can be improved. Further, the exhaust gas purification device can be disposed at a position lower than the engine installation frame surface. For example, the installation height of the engine and the exhaust gas purification device is lowered with respect to the chassis (engine installation frame surface) of the refrigeration container vehicle. Thus, the center of gravity of the vehicle body can be set to a low position.

  According to the second aspect of the present invention, the exhaust gas purification device is mounted in a posture in which the exhaust gas movement direction of the exhaust gas purification device intersects the output shaft of the engine, and the oil pan in the lower part of the engine Fixing the upper end side of the support leg, projecting the lower end side of the support leg downward from the oil pan below the engine, and detachably fixing the support base to the lower end side of the support leg, Since the exhaust gas purification device is mounted, an inlet on the exhaust gas intake side of the exhaust gas purification device can be disposed on the same side as the exhaust manifold outlet on the left side of the engine, and the exhaust manifold outlet and the exhaust gas purification device The connection distance at the inlet of the exhaust gas can be made short, and the exhaust gas piping workability can be improved.

  According to the third aspect of the present invention, the exhaust gas purification device is mounted in an attitude in which the exhaust gas movement direction of the exhaust gas purification device is parallel to the output shaft of the engine, and the oil in the lower part of the engine The upper end side of the support leg body is fixed to the pan, the lower end side of the support leg body is protruded downward from the oil pan below the engine, and the support base is detachably fixed to the lower end side of the support leg body. Since the exhaust gas purifying device is attached, an inlet on the exhaust gas intake side of the exhaust gas purifying device can be arranged immediately below the exhaust manifold outlet on the left side of the engine, and the exhaust gas has a simple straight tube shape. Gas piping can be configured, and exhaust gas piping workability can be improved.

It is a front view of the diesel engine mounted in the container which shows 1st Embodiment. It is a side view of the diesel engine mounted in the container. It is the right perspective view seen from the front side of a diesel engine. It is the left perspective view seen from the back side of a diesel engine. It is a right view of a diesel engine (intake manifold installation side). It is a front view of a diesel engine. It is the right perspective view seen from the front side of the diesel engine which shows a 2nd embodiment. It is the left perspective view seen from the back side of the diesel engine which shows a 2nd embodiment.

  DESCRIPTION OF EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings. 1 is a front view of a diesel engine mounted on a container, FIG. 2 is a side view of the diesel engine mounted on a container, FIG. 3 is a right perspective view of the diesel engine, FIG. 4 is a left perspective view of the diesel engine, and FIG. FIG. 6 is a front view of the diesel engine. FIG. The overall structure of the diesel engine 1 will be described with reference to FIGS. In the following description, the intake manifold installation side of the diesel engine 1 is simply referred to as the right side of the diesel engine 1, and the exhaust manifold installation side of the diesel engine 1 is also simply referred to as the left side of the diesel engine 1.

  As shown in FIGS. 3 to 5, an intake manifold 3 is disposed on the right side surface of the cylinder head 2 of the diesel engine 1. The cylinder head 2 is mounted on a cylinder block 5 in which an engine output shaft 4 (crankshaft) and a piston (not shown) are built. An exhaust manifold 6 is disposed on the left side surface of the cylinder head 2. The front end and the rear end of the engine output shaft 4 are projected from the front and rear surfaces of the cylinder block 5.

As shown in FIGS. 3 to 6, a flywheel housing 8 is fixed to the rear surface of the cylinder block 5. A flywheel 9 is provided in the flywheel housing 8. A flywheel 9 is pivotally supported on the rear end side of the engine output shaft 4. Moreover, the compressor 7 for refrigerant | coolant compression as an air conditioning apparatus is provided. The compressor 7 is fixed to the flywheel housing 8. The compressor 7 is configured to take out the power of the diesel engine 1 via the flywheel 9.

  Further, an oil pan 11 is disposed on the lower surface of the cylinder block 5. The flat upper area of the oil pan 11 is formed larger than the flat bottom area of the cylinder block 5. That is, the left and right side portions of the oil pan 11 protrude outward from the left and right side surfaces of the cylinder block 5, and the front portion of the oil pan 11 protrudes forward from the front surface of the cylinder block 5 to increase the oil storage volume of the oil pan 11. In this configuration, a large amount of engine oil (not shown) is stored in the oil pan 11 so that the engine oil is prevented from running short during continuous operation of the diesel engine 1.

  As shown in FIGS. 3 to 6, an exhaust gas recirculation device (EGR) 15 that takes in exhaust gas for recirculation is disposed in the intake manifold 3. An air cleaner (not shown) is connected to the intake manifold 3. The external air that has been dust-removed and purified by the air cleaner is sent to the intake manifold 3 and supplied to each cylinder of the four-cylinder diesel engine 1.

  Further, the exhaust gas recirculation device 15 mixes the recirculated exhaust gas (EGR gas from the exhaust manifold 6) of the diesel engine 1 and fresh air (external air from the air cleaner) and supplies it to the intake manifold 3. A main body case (collector) 17, a recirculation exhaust gas pipe 19 as a recirculation joint body connected to the exhaust manifold 6 via an EGR cooler 18 as a recirculation exhaust gas cooling means, and the recirculation exhaust gas And an EGR valve 20 for adjusting the suction amount of the gas. The EGR main body case 17 incorporates an intake throttle valve (not shown) for adjusting the amount of fresh air.

  With the above configuration, the EGR main body case 17 is communicated with the recirculated exhaust gas pipe 19 via the EGR valve 20, and a part of the exhaust gas discharged from the diesel engine 1 to the exhaust manifold 6 is transferred from the intake manifold 3 to the diesel engine. By returning to 1, the combustion temperature of the diesel engine 1 decreases, the amount of nitrogen oxide (NOx) discharged from the diesel engine 1 is reduced, and the fuel efficiency of the diesel engine 1 is improved.

  A cooling water pump 21 for circulating cooling water in the cylinder block 5 and a radiator (not shown) is provided. A cooling water pump 21 is disposed in front of the diesel engine 1. A cooling water pump 21 is connected to the front end portion of the engine output shaft 4 via a V belt 22 or the like, and the cooling water pump 21 is driven. On the other hand, the EGR cooler 18 is connected to the cooling water pump 21 via the cooling water pipe 23. The cooling water is sent from the cooling water pump 21 into the cylinder block 5 through the EGR cooler 18.

  Next, the fuel system structure of the diesel engine 1 will be described with reference to FIGS. As shown in FIGS. 3 and 5, a fuel pump 42 and a common rail 43 are provided that connect fuel tanks (not shown) to the injectors (not shown) for four cylinders provided in the diesel engine 1. The injector has an electromagnetic opening / closing control type fuel injection valve (not shown). A common rail 43 is fixed to the right side surface of the cylinder head 2, the common rail 43 is disposed close to the lower side of the intake manifold 3, and the common rail 43 is provided close to the intake manifold 3 and the exhaust gas recirculation device 15.

With the above configuration, the fuel in the fuel tank is pumped to the common rail 43 by the fuel pump 42, and high-pressure fuel is stored in the common rail 43. The fuel injection valve of each injector 41 is controlled to open and close, whereby high-pressure fuel in the common rail 43 is injected into each cylinder of the diesel engine 1. That is, by electronically controlling the fuel injection valve of the injector, the injection pressure, injection timing, and injection period (injection amount) of the fuel supplied from each injector 41 can be controlled with high precision. Nitrogen oxide (NOx) can be reduced.

  Next, the exhaust gas purification structure of the diesel engine 1 will be described with reference to FIGS. As shown in FIGS. 3 to 6, an exhaust gas purifying device 27 for purifying exhaust gas discharged from each cylinder of the diesel engine 1 is provided. Exhaust gas discharged from each cylinder of the diesel engine 1 to the exhaust manifold 6 passes through the exhaust gas purification device 27 and the like, and carbon monoxide (CO) and hydrocarbon (HC) in the exhaust gas of the diesel engine 1. In addition, the particulate matter (PM) is configured to be reduced.

  As shown in FIGS. 1 to 6, as an exhaust gas purifying device 27 for purifying the exhaust gas discharged from each cylinder of the diesel engine 3, a diesel part that removes particulate matter in the exhaust gas of the diesel engine 3. A first case 28 as a curate filter (DPF) and a second case 29 as a urea selective catalytic reduction (SCR) system for removing nitrogen oxides in the exhaust gas of the diesel engine 3 are provided. The first case 28 as the DPF case is provided with an oxidation catalyst and a soot filter (not shown), and the second case 29 as the SCR case is provided with an SCR catalyst for reducing the urea selective catalyst (not shown) and the oxidation. A catalyst is installed inside.

  Exhaust gas discharged from each cylinder of the diesel engine 3 to the exhaust manifold 15 is discharged to the outside via the exhaust gas purification device 27 and the like. The exhaust gas purifying device 27 is configured to reduce carbon monoxide (CO), hydrocarbon (HC), particulate matter (PM), and nitrogen oxides (NOx) in the exhaust gas of the diesel engine 3. doing.

  The first case 28 and the second case 29 are formed in a long cylindrical shape. A DPF inlet pipe 31 for taking in the exhaust gas and a DPF outlet pipe 32 for discharging the exhaust gas are provided on both sides of the first case 28 in the cylindrical shape (one end side and the other end side in the exhaust gas movement direction). Similarly, an SCR inlet pipe 33 for taking in exhaust gas and an SCR outlet pipe 34 for discharging exhaust gas are provided on both sides of the second case 29 (one end side and the other end side in the exhaust gas movement direction).

  Further, an exhaust pipe 37 is connected to the exhaust gas outlet pipe 36 of the exhaust manifold 6, and the DPF inlet pipe 31 is connected to the exhaust manifold 6 via the exhaust pipe 37, so that the exhaust gas of the diesel engine 1 is put into the first case 28. On the other hand, a urea mixing pipe 35 for connecting the SCR inlet pipe 33 to the DPF outlet pipe 32 is provided, and the exhaust gas of the first case 28 is introduced into the second case 29 via the urea mixing pipe 35. doing. The DPF outlet pipe 32 and the urea mixing pipe 35 are detachably connected by a flange body, and the SCR inlet pipe 33 and the urea mixing pipe 35 are detachably connected by a flange body.

  In addition, the first case 28, the second case 29, and the urea mixing pipe 35 are provided with a support base 45 arranged in parallel. The first case 28, the second case 29, and the urea mixing pipe 35 are integrally fixed by a support base 45 to form an exhaust gas purification device 27 having a single part structure. The upper ends of the plurality of support legs 46 are detachably fastened to the side surface of the diesel engine 1 (oil pan 11), and the lower ends of the plurality of support legs 46 are protruded downward from the lower surface side of the diesel engine 3, A support base 45 is detachably fastened and fixed to the lower end portion of the support leg body 46. That is, the exhaust gas purifying device 27 is disposed in the vicinity of the lower surface of the oil pan 11.

That is, the support 4 for fixing the first case 28, the second case 29, and the urea mixing pipe 35 in parallel.
5, the first case 28, the second case 29, and the urea mixing pipe 35 are integrally disposed on the support base 45 to form the exhaust gas purification device 27 having a single-part structure, and the lower surface of the diesel engine 1. The exhaust gas purification device 27 is attached to a support leg 46 projecting from the side toward the lower side. The support leg 46 is projected from the oil pan 11 toward the lower side, and the support leg 46 is The support base 45 is detachably fixed to the projecting lower end side, and the exhaust gas purification device 47 is attached to the lower surface side of the oil pan 11 via the support leg body 46.

  Next, a usage example of the diesel engine 1 will be described with reference to FIGS. As shown in FIGS. 1 to 2, a square box type freight transport container 52 for transporting frozen cargo or the like is mounted on a trailer vehicle body 51 that is towed by a towing vehicle (not shown). The trailer vehicle body 51 is horizontally supported by a retractable front support leg 53 and a rear wheel 54 and stored in a fixed place, while the front support leg 53 is stored in the rear part of the towing vehicle. The front part of the trailer vehicle body 51 is connected, and the trailer vehicle body 51 is pulled by the tow vehicle.

  In addition, an air conditioning housing 55 for air conditioning equipment is provided on the front surface of the cargo transport container 52. An air conditioner (not shown) for controlling the temperature in the container 52 is installed in the air conditioning housing 55. An engine room 56 is formed below the air conditioning housing 55. The diesel engine 1 and the compressor 7 that is a part of the air conditioning apparatus are installed in the engine room 56. By operating the compressor 7 by the diesel engine 1 and compressing the refrigerant of the air-conditioning equipment by the compressor 7, the temperature in the freight transport container 52 is kept at a cold temperature suitable for storing frozen cargo (−20 ° C. or the like). It is configured to hold. As shown in FIG. 1, the fuel filter 44 is arranged on the machine frame 58 side of the air conditioning housing 55 where the diesel engine 1 is installed, and the fuel filter 44 is supported on the upper part of the engine room 56, so that the fuel pump of the diesel engine 1 is provided. A fuel filter 44 is connected to 42.

  As shown in FIGS. 1 and 2, a maintenance door 57 is provided on the front surface of the engine room 56 so as to be openable and closable. By opening the door 57, the front surface of the engine room 56 is opened forward. Also, the front of the diesel engine 1 is directed to the left side of the cargo transport container 52, the diesel engine 1 is disposed on the right side of the engine room 56 toward the front of the cargo transport container 52, and the compressor 7 is disposed on the left side of the engine room 56. Place. That is, the right side surface of the diesel engine 1 and the right side surface of the compressor 7 are configured to face the front opening of the engine room 56.

  Further, as shown in FIGS. 1 and 2, an EGR valve 20 as an exhaust gas recirculation valve and a common rail 43 are disposed on the intake manifold 3 installation side on the right side of the diesel engine 1 and adjacent to the intake manifold 3 installation side. An EGR cooler 18 as exhaust gas cooling means for cooling the exhaust gas for recirculation is provided on the side surface of the diesel engine 1, and the diesel engine 1 is connected to the maintenance door 57 of the engine room 56 in which the diesel engine 1 is installed. The intake manifold 3 installation side is faced.

  As shown in FIGS. 2 and 3, on the intake manifold 3 installation side of the diesel engine 1, an engine oil supply lid 61 that closes the oil supply port on the upper surface of the oil pan 11, an engine oil filtration filter 62, and diesel A starter 63 for starting the engine 1 and the fuel pump 42 are provided. A drain cap 64 for extracting oil from the oil pan 11 is provided below the side surface of the oil pan 11 on the intake manifold 3 installation side.

With the above configuration, maintenance and inspection work for the EGR valve 20, the common rail 43, and the EGR cooler 18 can be performed from the front opening side (maintenance door 57) of the engine room 56 by an operator in front of the trailer vehicle body 51. . On the other hand, the engine oil refueling work to the fuel filling opening for opening and closing the fuel filling cover 61, the replacement work of the engine oil filter 62, and the maintenance and inspection work of the starter 63, the fuel pump 42, the injector 41, etc. This can be executed from the front opening side (maintenance door 57).

  As shown in FIGS. 3 to 6, a first case 28 for removing particulate matter in the exhaust gas of the diesel engine 1 and a second case 29 for removing nitrogen oxides in the exhaust gas of the diesel engine 1 are provided. In the engine apparatus in which the second case 29 is connected to the first case 28 via the urea mixing pipe 35, the first case 28, the second case 29, and the urea mixing pipe 35 are provided with a support base 45 that fixes the first case 28 in parallel. The case 28, the second case 29, and the urea mixing pipe 35 are integrally arranged on the support base 45 to form an exhaust gas purification device 27 having a single component structure, and project downward from the lower surface side of the diesel engine 1. The exhaust gas purification device 27 is attached to the supported leg body 46. Therefore, the upper surface side or side surface of the diesel engine 1 can be largely opened, and the maintenance workability of the upper surface side or side surface of the diesel engine 1 can be improved. Further, the exhaust gas purifying device 27 can be arranged at a position lower than the frame surface where the diesel engine 1 is installed. For example, the diesel engine 1 and the exhaust gas purifier are disposed on the chassis (engine installation frame surface) of the refrigeration container vehicle such as the trailer vehicle body 51. The installation height of the device 27 can be lowered, and the center of gravity of the vehicle body can be set at a low position.

  As shown in FIGS. 3 to 6, the exhaust gas purification device 27 is installed in such a posture that the exhaust gas movement direction of the exhaust gas purification device 27 intersects the output shaft 4 of the diesel engine 1, and the oil below the diesel engine 1 is installed. The upper end side of the support leg body 46 is fixed to the pan 11, the lower end side of the support leg body 46 protrudes downward from the oil pan 11 under the diesel engine 1, and the support base 45 can be attached to and detached from the lower end side of the support leg body 46. The exhaust gas purification device 27 is attached in a fixed manner. Accordingly, the exhaust gas intake side inlet of the exhaust gas purification device 27 can be arranged on the same side as the exhaust manifold 6 outlet on the left side of the diesel engine 1, and the connection distance between the exhaust manifold 6 outlet and the exhaust gas purification device 27 is shortened. The exhaust gas piping workability can be improved.

  Next, a modification of the mounting structure of the exhaust gas purifying device 31 will be described with reference to FIGS. In the first embodiment, the oil pan 11 is in a posture in which the exhaust gas movement direction of the exhaust gas purification device 27 (the first case 28, the second case 29, and the urea mixing pipe 35) intersects the engine output shaft 4. Although the exhaust gas purification device 27 is arranged on the lower surface side, in the second embodiment of FIGS. 7 and 8, the exhaust gas movement of the exhaust gas purification device 27 (first case 28, second case 29, urea mixing pipe 35) is performed. An exhaust gas purification device 27 is disposed on the lower surface side of the oil pan 11 in a posture in which the direction is parallel to the engine output shaft 4. Further, the DPF inlet pipe 31 of the first case 28 is opened upward so as to face the downward opening of the exhaust gas outlet pipe 36 of the exhaust manifold 6, and the exhaust gas outlet pipe 36 of the first case 28 is connected via the substantially straight exhaust pipe 37. The upward opening of the DPF inlet pipe 31 is connected to the downward opening.

  As shown in FIGS. 7 and 8, the exhaust gas purification device 27 is mounted in a posture in which the exhaust gas movement direction of the exhaust gas purification device 27 is parallel to the output shaft 4 of the diesel engine 1, and the lower part of the diesel engine 1 is installed. The upper end side of the support leg body 46 is fixed to the oil pan 11, the lower end side of the support leg body 46 protrudes downward from the oil pan 11 below the diesel engine 1, and the support base 45 can be attached to and detached from the lower end side of the support leg body 46. The exhaust gas purifying device 27 is attached to the gas outlet. Accordingly, the exhaust gas intake side inlet of the exhaust gas purifying device 27 can be arranged directly below the outlet of the exhaust manifold 6 on the left side of the diesel engine 1, and the exhaust gas pipe (exhaust pipe 37) can be formed in a simple straight tube shape. The exhaust gas piping workability can be improved.

DESCRIPTION OF SYMBOLS 1 Diesel engine 4 Engine output shaft 11 Oil pan 27 Exhaust-gas purification apparatus 28 1st case 29 2nd case 35 Urea mixing pipe 45 Support stand 46 Support leg

Claims (3)

A first case for removing particulate matter in the exhaust gas of the engine and a second case for removing nitrogen oxides in the exhaust gas of the engine are provided, and the second case is connected to the first case via a urea mixing tube. In the engine device to which the case is connected,
A support base for fixing the first case, the second case, and the urea mixing pipe in parallel; and the first case, the second case, and the urea mixing pipe are integrally disposed on the support base; An engine device characterized by forming an exhaust gas purification device and attaching the exhaust gas purification device to a support leg projecting downward from the lower surface side of the engine.   Attach the exhaust gas purification device in a posture where the exhaust gas movement direction of the exhaust gas purification device intersects the output shaft of the engine, and fix the upper end side of the support leg to an oil pan below the engine, The exhaust gas purification device is mounted by projecting the lower end side of the support leg downward from an oil pan at the lower part of the engine, and removably fixing the support base to the lower end side of the support leg. The engine device according to claim 1.   The exhaust gas purification device is mounted in a posture in which the exhaust gas movement direction of the exhaust gas purification device is parallel to the output shaft of the engine, and the upper end side of the support leg is fixed to an oil pan below the engine. The exhaust gas purification device is attached by causing the lower end side of the support leg to project downward from the oil pan below the engine, and detachably fixing the support base to the lower end side of the support leg. The engine device according to claim 1, wherein

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