JP2014025403A - Engine device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow an exhaust emission control system 2 to be highly rigidly arranged in an engine 1 as a component of the engine 1 with high degree of arrangement freedom.SOLUTION: An engine device includes an exhaust emission control system 2 which purifies exhaust gas from an engine 1. The exhaust emission control system 2 is mounted on a top portion side of the engine 1 via a mount base 70. The mount base 70 is constituted in a single by coupling two kinds of bracket bodies 71, 72. The exhaust emission control system 2 is supported by the bracket bodies 71, 72.

Description

  The present invention relates to an engine device mounted on a work machine such as a construction engineering machine, a farm work machine, and an engine generator.

  In recent years, due to the application of high-level exhaust gas regulations related to diesel engines (hereinafter simply referred to as engines), air pollutants in exhaust gases have been introduced into construction civil engineering machinery, agricultural machinery and engine generators on which engines are mounted. It is desired to install an exhaust gas purification device for purifying the exhaust gas. As an exhaust gas purification device, a diesel particulate filter (hereinafter referred to as DPF) that collects particulate matter or the like in exhaust gas is known (see Patent Documents 1 to 3).

JP 2000-145430 A Japanese Patent Laid-Open No. 2003-27922 JP 2010-71176 A

  By the way, in DPF, there exists a technique which regenerates a soot filter by carrying out combustion removal of the particulate matter which accumulates on a soot filter by use over time, when an engine is driven. As is well known, the soot filter regeneration operation occurs when the exhaust gas temperature is equal to or higher than the reproducible temperature (for example, about 300 ° C.). For this reason, there has been a demand for mounting the DPF at a position where the exhaust gas temperature is high, that is, directly on the engine.

  When the DPF is attached to the engine, the engine vibration due to the drive may be directly transmitted to the exhaust gas purification device. If an appropriate DPF attachment structure is not considered, the diesel oxidation catalyst and the soot filter housed in the DPF will vibrate. There is a concern that it will break.

  In this regard, Patent Document 3 discloses that an intake manifold and an exhaust manifold are separately arranged on both sides of an engine cylinder head and an exhaust gas purification device is connected to the intake and exhaust manifolds above the engine. ing. With this configuration, there is an advantage that the exhaust gas purification device can be supported with high rigidity using the intake / exhaust manifold, which is a high-rigidity part of the engine, and damage to the exhaust gas purification device due to vibration or the like can be prevented.

  However, in the configuration of Patent Document 3, the exhaust gas inlet pipe of the exhaust gas purification device is connected to the outlet portion of the exhaust manifold, so the location of the exhaust gas purification device above the engine naturally depends on the position of the outlet portion of the exhaust manifold. Limited. That is, the configuration of Patent Document 3 has room for improvement in that the degree of freedom of arrangement of the exhaust gas purification device above the engine is low.

  This invention makes it a technical subject to provide the engine apparatus which examined and improved the above present condition.

  The invention according to claim 1 is an engine device that includes an exhaust gas purification device that purifies the exhaust gas of the engine, and that has the exhaust gas purification device mounted on the upper side of the engine via a mount. A single mounting base is configured by connecting two types of bracket bodies, and the exhaust gas purifying device is supported by both the bracket bodies.

  According to a second aspect of the present invention, in the engine device according to the first aspect, the two bracket bodies are made of different materials, one is a cast iron bracket body, the other is a sheet metal bracket body, and the cylinder head of the engine. The bracket made of cast iron is fastened.

  The invention according to claim 3 is the engine device according to claim 1, wherein the bracket bodies are made of different materials, one is a cast iron bracket body, the other is a sheet metal bracket body, and the cast iron bracket body is The upper end side of the cast iron bracket body is fastened to the exhaust gas purifying device, the lower end side of the cast iron bracket body is fastened to the cylinder head of the engine, and the cast iron bracket body is connected to the intake manifold of the engine via a sheet metal auxiliary bracket. The upper and lower halfway parts are connected.

  According to the first aspect of the present invention, there is provided an exhaust gas purification device that purifies the exhaust gas of the engine, and the exhaust gas purification device is mounted on the upper side of the engine via a mounting base. Since the single mounting base is configured by connecting two types of bracket bodies, and the exhaust gas purification devices are supported by the bracket bodies, the exhaust gas purification device is supported using an intake / exhaust manifold. Compared with the prior art, the restriction of the arrangement of the exhaust gas purification device can be reduced, and the degree of freedom of arrangement of the exhaust gas purification device on the upper side of the engine is improved. The single mounting base made of the two types of bracket bodies makes it possible to mount the exhaust gas purifying device on the upper side of the engine while ensuring sufficient support strength in a small space.

  According to the invention of claim 2, the bracket bodies are made of different materials, one is a cast iron bracket body, the other is a sheet metal bracket body, and the cast iron bracket body is fastened to the cylinder head of the engine. Therefore, by the fastening, it is possible to set the mounting reference position of the exhaust gas purification device with respect to the engine with high accuracy, and even if the exhaust gas purification device is heavier than a muffler that is a post-processing device, It can be properly mounted at a predetermined position.

  According to the invention of claim 3, the bracket bodies are made of different materials, one is a cast iron bracket body, the other is a sheet metal bracket body, and the upper end side of the cast iron bracket body is the exhaust gas purification device. Since the lower end side of the cast iron bracket body is fastened to the cylinder head of the engine, the upper and lower middle portions of the cast iron bracket body are connected to the intake manifold of the engine via a sheet metal auxiliary bracket. The connection strength (rigidity) of the cast iron bracket body to the engine can be sufficiently secured by the connection between the intake manifold and the cast iron bracket body via the sheet metal auxiliary bracket, and due to vibration of the engine, etc. It is possible to prevent deterioration and damage of the exhaust gas purification device and contribute to improving the durability of the exhaust gas purification device.

It is a front view of an engine. It is a rear view of an engine. It is a left view of an engine. It is a right view of an engine. It is a top view of an engine. It is the perspective view which looked at the engine from back diagonally upward. It is the perspective view which looked at the engine from diagonally backward. It is a right view of an engine which shows the positional relationship of a cooling fan, a head cover, and an exhaust gas purification apparatus. It is the expansion perspective view which looked at the engine and the exhaust gas purification device from the front left diagonal. It is the expansion perspective view which looked at the engine and the exhaust gas purification device from the front right diagonal. It is a separation perspective view of the exhaust gas purification device for the engine.

  DESCRIPTION OF EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings. First, the schematic structure of the common rail engine 1 will be described with reference to FIGS. In the following description, both sides along the output shaft 3 (both sides sandwiching the output shaft 3) are left and right, the cooling fan 9 arrangement side is the front side, the flywheel 11 arrangement side is the rear side, and the exhaust manifold 7 arrangement side is The left side and the intake manifold 6 arrangement side are referred to as the right side, and these are used as a reference for the positional relationship between the four sides and the top and bottom in the engine 1 for convenience.

  As shown in FIGS. 1-8, the engine 1 as a motor | power_engine mounted in working machines, such as a construction civil engineering machine and an agricultural machine, is equipped with the continuous regeneration type exhaust gas purification apparatus 2 (DPF). The exhaust gas purification device 2 removes particulate matter (PM) in the exhaust gas discharged from the engine 1 and reduces carbon monoxide (CO) and hydrocarbons (HC) in the exhaust gas.

  The engine 1 includes a cylinder block 4 having a built-in output shaft 3 (crankshaft) and a piston (not shown). A cylinder head 5 is mounted on the cylinder block 4. An intake manifold 6 is disposed on the right side surface of the cylinder head 5. An exhaust manifold 7 is disposed on the left side surface of the cylinder head 5. That is, the intake manifold 6 and the exhaust manifold 7 are distributed and arranged on both side surfaces along the output shaft 3 in the engine 1. A head cover 8 is disposed on the upper surface of the cylinder head 5. A cooling fan 9 is provided on one side of the engine 1 that intersects the output shaft 3, specifically, on the front surface of the cylinder block 4. A mounting plate 10 is provided on the rear surface of the cylinder block 4. The flywheel 11 is arranged so as to overlap the mounting plate 10.

  A flywheel 11 is pivotally supported on the output shaft 3. The power of the engine 1 is taken out via the output shaft 3 to the working part of the work machine. An oil pan 12 is disposed on the lower surface of the cylinder block 4. Lubricating oil in the oil pan 12 is supplied to each lubricating portion of the engine 1 through an oil filter 13 disposed on the right side surface of the cylinder block 4.

  A fuel supply pump 14 for supplying fuel is attached to the right side surface of the cylinder block 4 above the oil filter 13 (below the intake manifold 6). The engine 1 is provided with an injector 15 for three cylinders with an electromagnetic opening / closing control type fuel injection valve (not shown). A fuel tank (not shown) mounted on the work machine is connected to each injector 15 via a fuel supply pump 14, a cylindrical common rail 16 and a fuel filter (not shown).

  Fuel in the fuel tank is pumped from the fuel supply pump 14 to the common rail 16 via a fuel filter (not shown), and high-pressure fuel is stored in the common rail 16. By controlling the fuel injection valves of the injectors 15 to open and close, the high-pressure fuel in the common rail 16 is injected from the injectors 15 into the cylinders of the engine 1. An engine starter 18 is provided on the mounting plate 10. The pinion gear of the engine starter 18 is engaged with the ring gear of the flywheel 11. When the engine 1 is started, the output shaft 3 starts to rotate (so-called cranking is executed) by rotating the ring gear of the flywheel 11 with the rotational force of the starter 18.

  A cooling water pump 21 is arranged coaxially with the fan shaft of the cooling fan 9 on the front side of the cylinder head 5 (on the cooling fan 9 side). On the left side of the engine 1, specifically, on the left side of the cooling water pump 21, an alternator 23 is provided as a generator that generates power using the power of the engine 1. As the output shaft 3 rotates, the cooling water pump 21 and the alternator 23 are driven together with the cooling fan 9 via the cooling fan driving V-belt 22. Cooling water in the radiator 19 (see FIGS. 3 and 4) mounted on the work machine is supplied to the cylinder block 4 and the cylinder head 5 by driving the cooling water pump 21, thereby cooling the engine 1.

  On the left and right side surfaces of the oil pan 12, engine leg mounting portions 24 are respectively provided. Each engine leg mounting portion 24 can be bolted to an engine leg (not shown) having vibration-proof rubber. In the embodiment, the oil pan 12 is sandwiched between a pair of left and right engine support chassis 25 in the work machine, and the engine leg mounting portion 24 on the oil pan 12 side is bolted to each engine support chassis 25, thereby The engine support chassis 25 supports the engine 1.

  A pair of left and right engine support chassis 25 is provided with a radiator 19 having a fan shroud 20 attached to the back side so as to be positioned on the front side of the engine 1. The fan shroud 20 surrounds the outside (outer peripheral side) of the cooling fan 9 and allows the radiator 19 and the cooling fan 9 to communicate with each other. Due to the rotation of the cooling fan 9, the cooling air blows against the radiator 19 and then flows from the radiator 19 to the engine 1 via the fan shroud 20.

  As shown in FIGS. 4 to 6 and the like, an air cleaner (not shown) is connected to the inlet portion of the intake manifold 6 via an EGR device 26 (exhaust gas recirculation device). The EGR device 26 is mainly disposed on the right side of the engine 1, specifically, on the right side of the cylinder head 5. The fresh air (external air) sucked into the air cleaner is dust-removed and purified by the air cleaner, and then enters the intake manifold 6 via the compressor case 62 (details will be described later) of the turbocharger 60 and the EGR device 26. Sent to each cylinder of the engine 1.

  The EGR device 26 mixes a part of the exhaust gas (EGR gas) of the engine 1 and fresh air and supplies it to the intake manifold 6, and an intake throttle that causes the EGR body case 27 to communicate with the compressor case 62. A member 28, a recirculation exhaust gas pipe 30 connected to the exhaust manifold 7 via an EGR cooler 29, and an EGR valve member 31 for communicating the EGR main body case 27 with the recirculation exhaust gas pipe 30 are provided.

  That is, the intake manifold 6 is connected to the intake manifold 6 via the EGR main body case 27. An outlet side of the recirculation exhaust gas pipe 30 is connected to the EGR main body case 27. The inlet side of the recirculated exhaust gas pipe 30 is connected to the exhaust manifold 7 via the EGR cooler 29. By adjusting the opening degree of the EGR valve in the EGR valve member 31, the supply amount of EGR gas to the EGR main body case 27 is adjusted. The EGR main body case 27 is detachably bolted to the intake manifold 6.

  In the above configuration, fresh air is supplied from the air cleaner through the compressor case 62 and the intake throttle member 28 into the EGR main body case 27, while EGR gas is supplied from the exhaust manifold 7 into the EGR main body case 27. After the fresh air from the air cleaner and the EGR gas from the exhaust manifold 7 are mixed in the EGR main body case 27, the mixed gas is supplied to the intake manifold 6. By returning a part of the exhaust gas discharged from the engine 1 to the exhaust manifold 7 from the intake manifold 6 to the engine 1, the maximum combustion temperature at the time of high load operation is lowered, and NOx (nitrogen oxide) from the engine 1 is reduced. Emissions are reduced.

  A turbocharger 60 is disposed on the left side of the cylinder head 5 and above the exhaust manifold 7. The turbocharger 60 includes a turbine case 61 with a built-in turbine wheel and a compressor case 62 with a built-in blower wheel. An exhaust gas intake pipe 63 of the turbine case 61 is connected to the outlet of the exhaust manifold 7. The exhaust gas purification device 2 is connected to the exhaust gas discharge pipe 64 of the turbine case 61. That is, the exhaust gas discharged from each cylinder of the engine 1 to the exhaust manifold 7 is discharged to the outside through the turbocharger 60, the exhaust gas purification device 2, and the like.

  The supply side of the compressor case 62 is connected to the supply / discharge side of the air cleaner via the supply pipe 65. The supply / discharge side of the compressor case 62 is connected to the intake manifold 6 via a supercharging pipe 66 and an EGR device 26. That is, fresh air removed by the air cleaner is sent from the compressor case 62 to the EGR device 26 via the supercharging pipe 66 and then supplied to each cylinder of the engine 1.

Next, the exhaust gas purification device 2 will be described. The exhaust gas purification device 2 includes a purification casing 38 having a purification inlet pipe 36. Inside the purification casing 38 is a diesel oxidation catalyst 39 such as platinum that generates nitrogen dioxide (NO ₂ ), and a soot filter having a honeycomb structure that continuously oxidizes and removes the collected particulate matter (PM) at a relatively low temperature. 40 are arranged in series in the exhaust gas movement direction. It can be said that the diesel oxidation catalyst 39 and the soot filter 40 are gas purification filters accommodated in the purification casing 38. For example, a silencer or a tail pipe is connected to the exhaust gas outlet 41 of the purification casing 38 via an exhaust pipe, and the exhaust gas is discharged from the exhaust gas outlet 41 to the outside via the silencer or the tail pipe.

In the above configuration, nitrogen dioxide (NO ₂ ) generated by the oxidation action of the diesel oxidation catalyst 39 is taken into the soot filter 40. Particulate matter contained in the exhaust gas of the engine 1 is collected by the soot filter 40 and continuously oxidized and removed by nitrogen dioxide (NO ₂ ). In addition to the removal of particulate matter (PM) in the exhaust gas of the engine 1, the content of carbon monoxide (CO) and hydrocarbon (HC) in the exhaust gas of the engine 1 is reduced.

  A purification inlet pipe 36 is provided on the outer peripheral portion of the purification casing 38 on the exhaust upstream side. A lid 42 is welded and fixed to the end of the purification casing 38 on the exhaust downstream side. An end of the purification casing 38 on the exhaust downstream side is closed by a lid 42. An exhaust gas outlet 41 is opened substantially at the center of the lid 42.

  An exhaust pressure sensor 44 is attached to the purification casing 38. The exhaust pressure sensor 44 detects the pressure difference of the exhaust gas between the upstream side and the downstream side of the soot filter 40, converts the pressure difference of the exhaust gas into an electric signal, and sends it to an engine controller (not shown). It is configured to output. Based on the exhaust pressure difference between the upstream and downstream of the soot filter 40, the amount of particulate matter accumulated in the soot filter 40 is calculated, and the clogged state in the soot filter 40 is grasped.

  As shown in FIGS. 1 to 8, a sensor fastening portion 46 with a through hole is provided on the intermediate clamping flange 45 of the purification casing 38, on the opposite side to the cooling fan 9 (head cover 8 side) in the outer peripheral portion of the purification casing 38. Provide to be located. The exhaust pressure sensor 44 integrally provided with the electrical wiring connector 44 a is bolted to the sensor fastening portion 46 of the intermediate clamping flange 45. That is, an electrical wiring connector 44 a for the exhaust pressure sensor 44 for the exhaust gas purification device 2 is arranged on the opposite side of the outer periphery of the exhaust gas purification device 2 from the cooling fan 9. The exhaust pressure sensor 44 corresponds to a detection member.

  One end side of the upstream sensor pipe 47 and the downstream sensor pipe 48 is connected to the exhaust pressure sensor 44. The upstream and downstream sensor piping boss bodies 49 and 50 are provided in the purification casing 38 so as to sandwich the soot filter 40 in the purification casing 38. Fastening boss bodies 51 and 52 provided on the other end side of the sensor pipes 47 and 48 are fastened to the sensor pipe boss bodies 49 and 50 via pipe joint bolts 53.

  In the above configuration, the exhaust pressure sensor 44 detects the difference between the exhaust gas pressure upstream (inflow) of the soot filter 40 and the exhaust gas pressure downstream (outflow) of the soot filter 40 (exhaust gas differential pressure). Is done. Since the residual amount of particulate matter in the exhaust gas collected by the soot filter 40 is proportional to the differential pressure of the exhaust gas, the exhaust pressure is increased when the amount of particulate matter remaining in the soot filter 40 increases more than a predetermined value. Based on the detection result of the sensor 44, regeneration control for reducing the amount of particulate matter in the soot filter 40 (for example, control for increasing the exhaust temperature) is executed. When the residual amount of the particulate matter further increases beyond the regeneration controllable range, the cleaning casing 38 is detached and disassembled, the soot filter 40 is cleaned, and the particulate matter is removed manually. Is called.

  As described above, when the electrical wiring connector 44a for the exhaust pressure sensor 44 for the exhaust gas purification device 2 is disposed on the opposite side of the outer periphery of the exhaust gas purification device 2 from the cooling fan 9, the upper end of the exhaust gas purification device 2 is disposed. It is possible to position the electrical wiring connector 44a at a height that is substantially the same as or lower than that, and with respect to the overall height of the engine 1 including the exhaust gas purifying device 2, the electrical wiring connector 44a and therefore the exhaust pressure sensor 44 The influence of placement can be reduced or eliminated. For this reason, in the engine 1 to which the exhaust gas purification device 2 is assembled, it is effective to keep the overall height as low as possible, and contributes to the downsizing of the engine 1.

  Further, since the exhaust pressure sensor 44 itself is located on the opposite side of the outer periphery of the exhaust gas purification device 2 from the cooling fan 9, the cooling air from the cooling fan 9 hits the exhaust pressure sensor 44 and the sensor pipes 47 and 48. Hateful. Therefore, it is possible to prevent the exhaust gas in the exhaust pressure sensor 44 and the sensor pipes 47 and 48 from being cooled by the cooling air from the cooling fan 9 as much as possible, to prevent erroneous detection of the exhaust pressure sensor 44, and soot filter 40. The accuracy of regeneration control that reduces the amount of particulate matter can be improved (can be performed properly).

  As shown in FIGS. 5 to 8, the exhaust gas purification device 2 is supported by the cylinder head 5 at a location near the cooling fan 9 on the upper surface side of the engine 1. For this reason, the exhaust gas purification device 2 can be shipped after the exhaust gas purification device 2 is incorporated into the engine 1, but the exhaust gas purification device 2 can be supported with high rigidity using the cylinder head 5 which is a high rigidity component of the engine 1. Damage to the exhaust gas purification device 2 due to vibration or the like can be prevented. Further, the exhaust gas purification device 2 can be communicated with the exhaust manifold 7 at a close distance, so that the exhaust gas purification device 2 can be easily maintained at an appropriate temperature, and high exhaust gas purification performance can be maintained. As a result, the exhaust gas purification device 2 can also be reduced in size. In addition, since the exhaust gas purification device 2 is disposed near the cooling fan 9 on the upper surface side of the engine 1, the upper surface side of the cylinder head 5, the intake manifold 6 and the exhaust manifold 7 can be exposed over a wide range. Maintenance work is also easier.

  In the embodiment, a space between the head cover 8 and the cooling fan 9 on the upper surface side of the engine 1 exists as a dead space. Therefore, the exhaust gas purification device 2 is positioned between the head cover 8 and the cooling fan 9 on the upper surface side of the engine 1 so that the longitudinal direction of the exhaust gas purification device 2 is orthogonal to the output shaft 3 of the engine 1. . For this reason, even the engine 1 with the exhaust gas purifying device 2 assembled can be structured to keep the overall height as low as possible, and the dead space between the head cover 8 and the cooling fan 9 can be effectively used to make the engine 1 compact. Can be realized.

  In the embodiment, since the outer peripheral side of the cooling fan 9 is surrounded by the fan shroud 20, it is possible to prevent the cooling air from the cooling fan 9 from directly hitting the exhaust gas purification device 2. For this reason, it is possible to avoid the exhaust gas temperature in the exhaust gas purification device 2 from being lowered by the cooling air from the cooling fan 9 as much as possible, and to appropriately maintain the exhaust gas purification performance of the exhaust gas purification device 2. However, the cooling water pump 21 faces the cooling fan 9 because of the positional relationship, and the cooling air from the cooling fan 9 directly blows against the cooling water pump 21. Therefore, the presence of the exhaust gas purification device 2 does not hinder the cooling of the cooling water pump 21.

  As shown in FIG. 1, the exhaust gas purification device 2 is located in the installation width L2 between the alternator 23 and the EGR device 26 that are generators and above the cooling water pump 21 in a front view. That is, the longitudinal length L1 of the exhaust gas purification device 2 is smaller than the installation width L2 corresponding to the full width of the engine 1. The exhaust gas purification device 2 is positioned above the cooling water pump 21 so as to be within the installation width L2 corresponding to the full width of the engine 1. For this reason, even if it is the engine 1 which assembled | attached the exhaust gas purification apparatus 2, it can be set as the structure which suppressed the full width as much as possible low, and it contributes to the compactization of the engine 1 also in this point.

  Further, the piping 64 between the turbocharger 60 and the exhaust gas purification device 2 and the piping 66 between the turbocharger 60 and the EGR device 26 can be arranged without being restricted by the exhaust gas purification device 2. The degree of freedom of installation of the pipes 64 and 66 can be improved.

  Next, a structure for assembling the exhaust gas purification device 2 to the engine 1 will be described. An exhaust gas discharge pipe 64 is bolted to the exhaust manifold 7 and the turbine case 61 of the turbocharger 60. The purification inlet pipe 36 of the exhaust gas purification device 2 (purification casing 38) is bolted to the exhaust gas discharge pipe. Exhaust gas in the exhaust manifold 7 is supplied from the turbine case 61 of the turbocharger 60 to the exhaust gas purification device 2 via the exhaust gas discharge pipe 64. The exhaust gas discharge pipe 64 also functions as a casing support that supports the exhaust gas purification device 2.

  As shown in detail in FIGS. 9 to 11, the engine 1 includes an inlet side bracket body 71 and an outlet side bracket body 72 for supporting and fixing the exhaust gas purification device 2. In the embodiment, the inlet side bracket body 71 is made of sheet metal, and the outlet side bracket body 72 is made of cast iron. The inlet side bracket body 71 corresponds to a sheet metal bracket body, and the outlet side bracket body 72 corresponds to a cast iron bracket body. That is, the combination of the inlet side bracket body 71 and the outlet side bracket body 72 corresponds to two types of bracket bodies. As described above, in the embodiment, the material of the bracket bodies 71 and 72 is different from that of cast iron or sheet metal. The material itself of each bracket body 71, 72 is not limited to cast iron or sheet metal, but may be other materials such as die-cast.

  The lower end side of the inlet side bracket body 71 is bolted to the front part of the left side surface of the cylinder head 5. The lower end side of the outlet side bracket body 72 is bolted to the front side of the cylinder head 5, and the upper and lower middle parts of the outlet side bracket body 72 are bolted to the upper surface of the intake manifold 6 via the connection bracket 73. The connection bracket 73 is made of the same sheet metal as the inlet side bracket body 71 and corresponds to a sheet metal auxiliary bracket. An inlet side bracket body 71 and an outlet side bracket body 72 are erected on the front side of the cylinder head 5.

  As described above, by fastening the lower end side of the outlet side bracket body 72 to the front side of the cylinder head 5, the reference mounting position of the exhaust gas purification device 2 with respect to the engine 1 can be set with high accuracy. For this reason, even if the exhaust gas purification device 2 is heavier than a muffler or the like as a post-processing device, it can be properly mounted at a predetermined position. In addition, the connection strength (rigidity) of the outlet side bracket body 72 to the engine 1 can be sufficiently secured by the connection of the intake manifold 6 and the outlet side bracket body 72 via the connection bracket 73, and exhaust due to vibration of the engine 1 or the like. It is possible to prevent deterioration and damage of the gas purification device 2 and contribute to improving the durability of the exhaust gas purification device 2.

  A reinforcing plate portion 74 is provided on the upper end side of the inlet side bracket body 71. The distal end portion (right end portion) of the reinforcing plate portion 74 of the inlet side bracket body 71 is connected to the upper end side of the outlet side bracket body 72. That is, a single mounting base 70 is configured by connecting the inlet side bracket body 71 and the outlet side bracket body 72 through the reinforcing plate portion 74.

  A receiving bracket 75 welded and fixed to the exhaust downstream side of the outer peripheral surface of the purification casing 38 is bolted to the base end portion (left end portion) of the reinforcing plate portion 74 fixed to the upper end side of the inlet side bracket body 71. The upper end side of the outlet side bracket body 72 is bolted to the intermediate clamping flange 45 of the purification casing 38. The exhaust-gas purification device 2 (purification casing 38) is supported on the cylinder head 5 of the engine 1 by the inlet-side bracket body 71 and the outlet-side bracket body 72 which are a single mounting base 70. For this reason, compared with the prior art that uses the intake / exhaust manifold to support the exhaust gas purification device, the arrangement restriction of the exhaust gas purification device 2 can be reduced, and the arrangement of the exhaust gas purification device 2 on the upper side of the engine 1 can be reduced. The degree of freedom is improved. The exhaust gas purifying device 2 can be mounted on the upper side of the engine 1 while ensuring sufficient support strength in a small space by the single mounting base 70 including the outlet side bracket body 72 and the inlet side bracket body 71. It becomes possible.

  As apparent from the above description and FIGS. 1 to 8, the exhaust gas purification device 2 for purifying the exhaust gas from the engine 1 is provided, and the longitudinal direction of the exhaust gas purification device 2 is the output of the engine 1. An engine device in which the exhaust gas purification device 2 is mounted on the engine 1 so as to be orthogonal to the shaft 3, provided with a cooling fan 9 on one side surface intersecting the output shaft 3 in the engine 1, Since the exhaust gas purification device 2 is supported by the cylinder head 5 at a location near the cooling fan 9 on the upper surface side of the engine 1, the engine 1 can be shipped after the exhaust gas purification device 2 is incorporated into the engine 1 However, the exhaust gas purifying device 2 can be supported with high rigidity by using the cylinder head 5 which is a highly rigid part of the engine 1, and the exhaust gas due to vibration or the like can be supported. Thereby preventing damage to the apparatus 2.

  Further, the exhaust gas purification device 2 can be communicated with the exhaust manifold 7 at a close distance, so that the exhaust gas purification device 2 can be easily maintained at an appropriate temperature, and high exhaust gas purification performance can be maintained. As a result, the exhaust gas purification device 2 can also be reduced in size. In addition, since the exhaust gas purifying device 2 is disposed near the cooling fan 9 on the upper surface side of the engine 1, the upper surface side of the cylinder head 5, the intake manifold 6 and the exhaust manifold 7 is exposed over a wide range. This also facilitates maintenance work related to the engine 1.

  As is clear from the above description and FIGS. 5 and 8, the exhaust gas purification device 2 is located between the head cover 8 on the cylinder head 5 and the cooling fan 9. The exhaust gas purification device 2 can be arranged by effectively utilizing the dead space existing between the head cover 8 and the cooling fan 9 on the upper surface side. Therefore, even the engine 1 assembled with the exhaust gas purification device 2 can have a structure in which the overall height is kept as low as possible, and the engine 1 can be made compact.

  As is apparent from the above description and FIGS. 1 to 4, the electrical wiring connector for the detection member 44 for the exhaust gas purification device 2 is provided on the opposite side of the outer periphery of the exhaust gas purification device 2 from the cooling fan 9. 44a is disposed, the electrical wiring connector 44a can be positioned at a height that is substantially the same as or lower than the upper end of the exhaust gas purification device 2, and the exhaust gas purification device 2 is The influence of the arrangement of the electrical wiring connector 44a can be reduced or eliminated with respect to the total height of the engine 1 including the engine 1. For this reason, in the engine 1 to which the exhaust gas purification device 2 is assembled, it is effective to keep the overall height as low as possible, and this point also contributes to the downsizing of the engine 1.

  As is clear from the above description and FIGS. 1 to 4, the intake manifold 6 and the exhaust manifold 7 are distributed and arranged on both side surfaces along the output shaft 3 in the engine 1. A generator 23 is disposed on the exhaust manifold 7 side, an EGR device 26 is disposed on the intake manifold 6 side of the engine 1, a cooling water pump 21 is disposed on the cooling fan 9 side of the engine 1, and the generator 23 and the EGR device 26, and the exhaust gas purification device 2 is positioned above the cooling water pump 21, so the engine 1 with the exhaust gas purification device 2 assembled can be used. Even if it exists, it can be set as the structure which suppressed the full width as much as possible, and also contributes to the compactization of the said engine 1 also in this point. Further, for example, a pipe 64 between the turbocharger 60 and the exhaust gas purification device 2 and a pipe 66 between the turbocharger 60 and the EGR device 26 are restricted to the exhaust gas purification device 2. Therefore, the degree of freedom of installation of the pipes 64 and 66 can be improved. Further, the cooling air from the cooling fan 9 directly blows against the cooling water pump 21, and the presence of the exhaust gas purification device 2 does not hinder the cooling of the cooling water pump 21.

  As is apparent from the above description and FIGS. 9 to 11, the exhaust gas purification device 2 for purifying the exhaust gas of the engine 1 is provided, and the exhaust gas is disposed on the upper side of the engine 1 via a mounting base 70. The engine device is equipped with the purification device 2, and a single mounting base 70 is configured by connecting two types of bracket bodies 71, 72, and the exhaust gas purification device 2 is connected to both the bracket bodies 71, 72. Therefore, as compared with the prior art in which the exhaust gas purification device is supported using an intake / exhaust manifold, the arrangement restriction of the exhaust gas purification device 2 can be reduced, and the upper side of the engine 1 can be The degree of freedom of arrangement of the exhaust gas purification device 2 is improved. The exhaust gas purifying device 2 can be mounted on the upper side of the engine 1 while ensuring sufficient support strength in a small space by the single mounting base 70 composed of the two types of bracket bodies 71 and 72. It becomes possible.

  As apparent from the above description and FIGS. 9 to 11, the bracket bodies 71 and 72 are made of different materials, one of which is a cast iron bracket body 72 and the other of which is a sheet metal bracket body 71. Since the cast iron bracket body 72 is fastened to one cylinder head 5, the fastening reference position of the exhaust gas purification device 2 with respect to the engine 1 can be set with high accuracy by the fastening, and the muffler which is a post-processing device Even if the exhaust gas purification device 2 is heavier than the above, it can be properly mounted at a predetermined position.

  As is clear from the above description and FIGS. 9 to 11, the bracket bodies 71, 72 are made of different materials, one is a cast iron bracket body 72, the other is a sheet metal bracket body 71, and the cast iron An upper end side of the bracket body 72 is fastened to the exhaust gas purification device 2, a lower end side of the cast iron bracket body 72 is fastened to the cylinder head 5 of the engine 1, and a sheet metal auxiliary is attached to the intake manifold 6 of the engine 1. Since the upper and lower middle parts of the cast iron bracket body 72 are connected via the bracket 73, the engine is connected to the intake manifold 6 and the cast iron bracket body 72 via the sheet metal auxiliary bracket 73. 1 can sufficiently secure the connection strength (rigidity) of the cast iron bracket body 72 with respect to the exhaust 1. To prevent deterioration and damage of the scan purifier 2, which contributes to improved durability of the exhaust gas purifying device 2.

  In addition, the structure of each part in this invention is not limited to embodiment of illustration, A various change is possible in the range which does not deviate from the meaning of this invention.

DESCRIPTION OF SYMBOLS 1 Engine 2 Exhaust-gas purification apparatus 3 Output shaft 4 Cylinder block 5 Cylinder head 6 Intake manifold 7 Exhaust manifold 8 Head cover 9 Cooling fan 70 Mounting base 71 Inlet side bracket body (sheet metal bracket body)
72 Outlet bracket body (cast iron bracket body)
73 Connecting bracket (Auxiliary bracket made of sheet metal)

Claims (3)

An exhaust gas purification device for purifying the exhaust gas of the engine, wherein the exhaust gas purification device is mounted on the upper side of the engine via a mount;
The single mounting base is configured by connecting two types of bracket bodies, and the exhaust gas purification device is supported by both the bracket bodies.
Engine equipment. The two bracket bodies are made of different materials, one is a cast iron bracket body, the other is a sheet metal bracket body, and the cast iron bracket body is fastened to the cylinder head of the engine.
The engine device according to claim 1. The bracket bodies are made of different materials, one is a cast iron bracket body, the other is a sheet metal bracket body, the upper end side of the cast iron bracket body is fastened to the exhaust gas purification device, and the cast iron bracket The lower end side of the body is fastened to the cylinder head of the engine, and the upper and lower middle portions of the cast iron bracket body are connected to the intake manifold of the engine via a sheet metal auxiliary bracket,
The engine device according to claim 1.

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