JP2010270612A - Burner device for internal combustion engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technology to stabilize combustion in a burner combustion chamber by taking-in oxygen in exhaust gas, in a burner device for an internal combustion engine. <P>SOLUTION: This burner device for the internal combustion engine includes: an air introduction section 104 for supplying air into the burner combustion chamber; a fuel injection nozzle 105 for supplying fuel into the burner combustion chamber; and an electrode 106 for igniting an air-fuel mixture in the burner combustion chamber. The burner combustion chamber is formed inside a bottomed cylindrical body 108 projecting in an exhaust passage 8. A plurality of exhaust intakes 113, 114 are formed on the peripheral surface of the bottomed cylindrical body 108 so that exhaust gas flowing in the exhaust passage 8 is taken-in the burner combustion chamber. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a burner device for an internal combustion engine that is provided in an exhaust passage of the internal combustion engine and raises the temperature of the exhaust gas.

  An exhaust system for an internal combustion engine is disclosed that includes a secondary fuel supply unit for introducing secondary fuel into the exhaust gas in an exhaust passage of the internal combustion engine (see, for example, Patent Document 1). In this system, the introduction of secondary fuel into the exhaust takes place via or through a post-circulation device. The post-circulation device has a circulation space that receives the exhaust side stream from the exhaust line, and the secondary fuel is introduced into the exhaust side stream in the circulation space, and the reformed exhaust side stream flows from the circulation space to the exhaust line. Reflux.

JP 2006-112423 A

  By the way, as described in the above technique, there is a case where a so-called burner device is used in which fuel and air are supplied to an exhaust passage of an internal combustion engine and burned. In such a burner device, it is desired to reduce the size of the device for supplying air necessary for combustion by taking oxygen in the exhaust gas into the burner combustion chamber of the burner device. That is, in a burner device for an internal combustion engine, it is desired to stabilize the combustion by appropriately using oxygen in the exhaust gas flowing through the exhaust passage for combustion.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a technique for capturing oxygen in exhaust gas and stabilizing combustion in a burner combustion chamber in a burner device for an internal combustion engine.

In the present invention, the following configuration is adopted. That is, the present invention
A burner device for an internal combustion engine that is provided in an exhaust passage of the internal combustion engine and raises the temperature of exhaust gas flowing through the exhaust passage,
Air supply means for supplying air to the burner combustion chamber;
Fuel supply means for supplying fuel to the burner combustion chamber;
Ignition means for igniting the air-fuel mixture in the burner combustion chamber;
With
The burner combustion chamber is formed inside a bottomed cylindrical body protruding into the exhaust passage,
A burner device for an internal combustion engine, characterized in that a plurality of exhaust intake ports for taking the exhaust gas flowing through the exhaust passage into the burner combustion chamber are provided on the peripheral surface of the bottomed cylindrical body.

According to the present invention, the exhaust gas flowing through the exhaust passage can be taken into the burner combustion chamber from the plurality of exhaust intake ports provided on the peripheral surface of the bottomed cylindrical body. For this reason, oxygen in exhaust gas can be taken into the burner combustion chamber and combustion in the burner combustion chamber can be stabilized. Therefore, the amount of air to be supplied from the air supply means for supplying air necessary for combustion in the burner combustion chamber can be reduced, and the air supply means and the apparatus for supplying air related thereto can be reduced in size. it can.

  The bottomed cylindrical body is a double cylinder having an inner cylinder and an outer cylinder that covers the inner cylinder with a gap between the inner cylinder and the inner cylinder, and the exhaust intake port includes the inner cylinder and the outer cylinder. It is good to be provided in both of the cylinders.

  According to the present invention, even if the bottomed cylindrical body has an inner cylinder and an outer cylinder, the exhaust flowing through the exhaust passage outside the outer cylinder from the exhaust intake is taken into the burner combustion chamber inside the inner cylinder. Can do.

  The exhaust passage is branched from the exhaust flow upstream side of the position where the bottomed cylindrical body of the exhaust passage is disposed, and is connected to the outside of the bottomed cylindrical body, and the exhaust of the exhaust passage is transferred to the burner combustion chamber. It is preferable to provide an exhaust supply passage for supplying.

  According to the present invention, the exhaust gas flowing through the exhaust passage from the exhaust supply passage to the exhaust intake port can be guided and taken into the burner combustion chamber. For this reason, it becomes easy to take in oxygen in exhaust gas by a burner combustion chamber, and combustion in a burner combustion chamber can be stabilized more.

  The axis of the bottomed cylindrical body may be inclined with respect to the exhaust flow direction of the exhaust passage and the direction perpendicular to the exhaust flow direction of the exhaust passage.

  According to the present invention, since the axis of the bottomed cylindrical body is inclined with respect to the exhaust flow direction of the exhaust passage and the direction perpendicular to the exhaust flow direction of the exhaust passage, the height at which the burner device projects outside the exhaust passage. Can be lowered. For this reason, it becomes easy to ensure the installation space of a burner apparatus, and it becomes advantageous on mounting to an internal combustion engine.

  According to the present invention, in the burner device for an internal combustion engine, oxygen in exhaust gas can be taken in and combustion in the burner combustion chamber can be stabilized.

1 is a diagram showing a schematic configuration of an internal combustion engine and an intake system / exhaust system thereof according to Embodiment 1. FIG. 1 is an external view of a burner device for an internal combustion engine according to Embodiment 1. FIG. 1 is a diagram illustrating a schematic configuration of a burner device for an internal combustion engine according to Embodiment 1. FIG. It is a figure which shows schematic structure of the bottomed cylindrical body in the burner apparatus of the internal combustion engine which concerns on Example 1. FIG. 3 is a flowchart showing a combustion control routine of the burner device for the internal combustion engine according to the first embodiment. It is a figure which shows the external appearance of the burner apparatus of the internal combustion engine which concerns on Example 2. FIG. It is a figure which shows schematic structure of the burner apparatus of the internal combustion engine which concerns on Example 2. FIG.

  Specific examples of the present invention will be described below.

<Example 1>
FIG. 1 shows a schematic configuration of an internal combustion engine 1 to which a burner device for an internal combustion engine according to the present embodiment is applied, and its intake and exhaust systems. The internal combustion engine 1 is a water-cooled four-stroke cycle diesel engine having four cylinders 3 that form a combustion chamber together with a piston 2. The internal combustion engine 1 is mounted on a vehicle. Each cylinder 3 of the internal combustion engine 1 is provided with a fuel injection valve 4 that injects fuel at an appropriate amount and timing. Fuel is pumped from the supply pump 5 to the fuel injection valve 4. The supply pump 5 also supplies fuel to a burner device 100 described later. An engine cooling water temperature sensor 6 is attached to the internal combustion engine 1.

  An intake passage 7 and an exhaust passage 8 are connected to the internal combustion engine 1. In the middle of the intake passage 7 connected to the internal combustion engine 1, a compressor 9a of a turbocharger 9 that operates using exhaust energy as a drive source is arranged. In the intake passage 7 upstream of the compressor 9a, an air cleaner 10, an atmospheric temperature sensor 11, and an air flow meter 12 are arranged from the upstream side. In the intake passage 7 downstream of the compressor 9a, an intercooler 13, an intake air temperature sensor 14, a throttle valve 15, and an intake pressure sensor 16 are arranged from the upstream side. These intake passages 7 and the devices arranged in the intake passage 7 constitute an intake system for taking intake air into the internal combustion engine 1.

  On the other hand, a turbine 9 b of a turbocharger 9 is arranged in the middle of the exhaust passage 8 connected to the internal combustion engine 1. The turbine 9b is driven by exhaust gas flowing through the exhaust passage 8, and the compressor 9a rotates together with the driven turbine 9b to supercharge intake air flowing through the intake passage 7.

  The internal combustion engine 1 is provided with a high-pressure EGR device 17 that recirculates (recirculates) a part of the exhaust gas flowing through the exhaust passage 8 upstream of the turbine 9b to the intake passage 7 downstream of the compressor 9a at a high pressure. . The high pressure EGR device 17 includes a high pressure EGR passage 18, a high pressure EGR valve 19, and a high pressure EGR cooler 20. The high pressure EGR passage 18 supplies a part of the exhaust gas flowing through the check valve to the air tank 21. The exhaust gas stored in the air tank 21 flows out to the turbine 9b through the check valve, and is supplied to the burner device 100 described later.

  From the upstream side, the burner device 100, the first NOx sensor 22, the exhaust temperature sensor 23, the first exhaust gas purification device 24, the DPF floor temperature sensor 25, the differential pressure sensor 26, and urea are added to the exhaust passage 8 downstream of the turbine 9b. A valve 27, a second exhaust purification device 28, a second NOx sensor 29, and an exhaust throttle valve 30 are arranged. Details of the burner device 100 will be described later.

  The first exhaust purification device 24 includes a particulate filter (hereinafter simply referred to as a DPF) 24a and an oxidation catalyst 24b disposed at a subsequent stage of the DPF 24a. The DPF 24a collects PM (particulate matter, soot) as exhaust system foreign matter contained in the exhaust flowing into the first exhaust purification device 24 and purifies the exhaust. However, the PM collection performance of the DPF 24a of the first exhaust purification device 24 has a limit. For this reason, in order to recover the performance of the DPF 24a, a control for recovering the performance of the first exhaust purification device 24 called so-called filter regeneration control (PM oxidation removal control) is performed on the first exhaust purification device 24. In the filter regeneration control, when the differential pressure sensor 26 detects that the amount of PM accumulated in the DPF 24a is equal to or greater than the predetermined amount C, exhaust gas whose temperature has been raised by a burner device 100 described later is supplied downstream. The temperature of the first exhaust purification device 24 is raised, and the PM collected in the DPF 24a is oxidized and removed.

  The second exhaust purification device 28 includes a selective reduction catalyst (hereinafter simply referred to as an SCR catalyst) 28a and an ASC catalyst 28b disposed at the subsequent stage of the SCR catalyst 28a. The SCR catalyst 28a purifies the exhaust gas by reducing NOx contained in the exhaust gas flowing into the second exhaust gas purification device 28 using urea added from the urea addition valve 27 disposed on the upstream side.

  The exhaust passage 8 and the devices arranged in the exhaust passage 8 constitute an exhaust system for exhausting exhaust gas from the internal combustion engine 1.

  The internal combustion engine 1 configured as described above is provided with an ECU 31 that is an electronic control unit for controlling the internal combustion engine 1. The ECU 31 is a unit that controls the operation state of the internal combustion engine 1 in accordance with the operation conditions of the internal combustion engine 1 and the request of the driver. Various types of sensors, a crank position sensor 32, and an accelerator position sensor (not shown) are connected to the ECU 31 via electrical wiring, and output signals from these various sensors are input to the ECU 31. On the other hand, the fuel injection valve 4, the throttle valve 15, the high pressure EGR valve 19, the burner device 100, the urea addition valve 27, and the exhaust throttle valve 30 are connected to the ECU 31 through electric wiring. Be controlled.

  Next, the burner device 100 will be described in detail. As shown in FIG. 1, the burner device 100 is disposed in the exhaust passage 8 immediately downstream of the turbine 9b, and raises the temperature of the exhaust gas flowing through the exhaust passage 8 discharged from the turbine 9b. Note that the exhaust gas temperature is increased by the burner device 100 when the internal combustion engine 1 is at a low temperature, when the DPF 24a is at a low temperature, when filter regeneration control is performed, or the like.

  FIG. 2 shows the appearance of the burner device 100 of the internal combustion engine 1 according to this embodiment. FIG. 3 shows a schematic configuration of the burner device 100 of the internal combustion engine 1 according to the present embodiment. FIG. 4 shows a schematic configuration of the bottomed cylindrical body 108 in the burner device 100 of the internal combustion engine 1 according to the present embodiment. As shown in FIG. 2, the burner device 100 is fixed to a part of the exhaust pipe 8a constituting the exhaust passage 8 in a state where a part of the main body upper part 101 and the main body lower part 102 are exposed from the exhaust pipe 8a.

  As shown in FIG. 3, the burner apparatus 100 includes a main body upper portion 101 covered with an upper case 103, an air introduction portion 104, a fuel injection nozzle 105, and an electrode 106, and a portion exposed from the exhaust pipe 8 a. The bottom portion 102 of the main body covered with the lower case 107 is provided with a bottomed cylindrical body 108 serving as a burner combustion chamber in which the inside actually burns to raise the temperature of the exhaust gas.

  The air introduction unit 104 is a space around the fuel injection nozzle 105 and the electrode 106, and exhaust gas is supplied from the air tank 21 shown in FIG. 1 to an air introduction port 109 communicating with the air introduction unit 104. Then, exhaust from the air introduction unit 104 is sent out from the air passage 110 provided at the outer peripheral end of the air introduction unit 104 to the burner combustion chamber inside the bottomed cylindrical body 108. A device from the time when air is supplied from the internal combustion engine 1 to the burner combustion chamber via the air tank 21 corresponds to the air supply means of the present invention.

  The fuel injection nozzle 105 is disposed at the center of the main body upper portion 101, is supplied with fuel from the supply pump 5 shown in FIG. 1, and injects the fuel into the burner combustion chamber inside the bottomed cylindrical body 108. The fuel injection nozzle 105 is electrically connected to the ECU 31 and injects fuel at an appropriate timing according to a command from the ECU 31. The fuel injection nozzle 105 corresponds to the fuel supply means of the present invention.

  The electrode 106 is disposed at a position where discharge can be performed from the tip thereof to the tip of the fuel injection nozzle 105, and the fuel injected from the fuel injection nozzle 105 and the exhaust in the burner combustion chamber inside the bottomed cylindrical body 108 are mixed. Ignite the mixture. The electrode 106 is electrically connected to the ECU 31 and the power source 33, and ignites the air-fuel mixture at an appropriate timing according to a command from the ECU 31. The electrode 106 corresponds to the ignition means of the present invention. In addition, since ignition is only performed by discharging and igniting between a pair of electrodes at the front end of the electrode 106 and the front end of the fuel injection nozzle 105, the ignition time is short, and the exhaust at the cold start of the internal combustion engine 1 is sufficient. Deterioration can be reduced to a minimum.

The axis of the bottomed cylindrical body 108 is directed in a direction perpendicular to the exhaust flow direction of the exhaust passage 8. The bottomed cylindrical body 108 has a gap with the lower case 107 on the outer peripheral side, and further protrudes into the exhaust passage 8 while the lower case 107 is connected to the exhaust pipe 8a. . Note that the depth D1 at which the bottomed cylindrical body 108 protrudes into the exhaust passage 8 is such that the deeper the depth is, the more the exhaust flow in the exhaust passage 8 is blocked, which causes the exhaust pressure of the internal combustion engine 1 to increase. Therefore, the optimum depth is set in advance by experiment, verification, or the like.

  As shown in FIG. 4, the bottomed cylindrical body 108 includes a bottomed inner cylinder 111 having an end surface protruding into the exhaust passage 8 as a bottom surface, and a gap between the inner cylinder 111 and the inner cylinder 111. A double-cylinder cylinder that includes a bottomed outer cylinder 112 that covers 111 and also has a bottom surface. A plurality of exhaust inlets 113 for taking the exhaust gas flowing through the exhaust passage 8 into the burner combustion chamber on the peripheral surface of the bottomed cylindrical body 108, specifically, the side surfaces and bottom surfaces of both the inner cylinder 111 and the outer cylinder 112, 114 is provided. By forming the plurality of exhaust intake ports 113 and 114 in this way, even if the bottomed cylindrical body 108 has the inner cylinder 111 and the outer cylinder 112, the exhaust intake ports 113 and 114 are connected to the outside of the outer cylinder 112. The exhaust gas flowing through the exhaust passage 8 can be taken into the burner combustion chamber inside the inner cylinder 111. In particular, since there is a gap between the lower case 107 and the outer cylinder 112, the exhaust gas from the exhaust intake port 114 is exhausted over a wide range on the side surface on the upstream side of the exhaust flow of the outer cylinder 112 as shown by the arrows in FIG. Can be imported. Further, the heated exhaust gas taken into the burner combustion chamber is caused to flow into the exhaust passage 8 from the exhaust inlets 113 and 114 on the side and bottom surfaces of the inner cylinder 111 and the outer cylinder 112 on the downstream side of the exhaust flow. In particular, since there is a gap between the lower case 107 and the outer cylinder 112, the exhaust gas from the exhaust intake port 114 is exhausted over a wide range on the side surface on the downstream side of the exhaust flow of the outer cylinder 112 as shown by the arrows in FIG. Can flow out into the exhaust passage 8.

  In the burner device 100 configured as described above, a plurality of exhaust intake ports 113 and 114 provided on the peripheral surfaces of the inner cylinder 111 and the outer cylinder 112 which are the bottomed cylindrical body 108, particularly the exhaust flow upstream side. The exhaust gas flowing through the exhaust passage 8 from the exhaust intake ports 113 and 114 can be taken into the burner combustion chamber. On the other hand, the exhaust from the burner combustion chamber can be discharged to the exhaust passage 8 from the exhaust intakes 113 and 114 on the downstream side of the exhaust flow. For this reason, oxygen in exhaust gas can be taken into the burner combustion chamber and combustion in the burner combustion chamber can be stabilized. Further, the ventilation of the burner combustion chamber can be performed by passing exhaust gas through the exhaust passage 8 and passing through the burner combustion chamber without using any device, and the combustion in the burner combustion chamber can be continuously stabilized. Therefore, the amount of air to be supplied from the air introduction unit 104 that supplies air necessary for combustion in the burner combustion chamber can be reduced, and the apparatus for supplying air from the air tank 21 can be downsized.

  Next, a combustion control routine of the burner device 100 according to the present embodiment will be described. FIG. 5 is a flowchart showing a combustion control routine of the burner apparatus 100 according to the present embodiment. This routine is repeatedly executed by the ECU 31 every predetermined time.

  In S101, it is determined whether or not the engine coolant temperature of the internal combustion engine 1 is lower than the first predetermined temperature T1. The engine coolant temperature is detected by an engine coolant temperature sensor 6 electrically connected to the ECU 31. If the first predetermined temperature T1 is a temperature lower than that, it can be determined that the DPF 24a of the first exhaust purification device 24 is not in an active state and is a cold start time of the internal combustion engine 1. Or by verification. If it is determined in S101 that the engine coolant temperature is lower than the first predetermined temperature T1, the process proceeds to S102. On the other hand, if it is determined in S101 that the engine coolant temperature is not lower than the first predetermined temperature T1, the process proceeds to S105.

  In S102, the burner apparatus 100 is turned on and combustion is performed by the burner apparatus 100. Thereby, the temperature of the exhaust gas flowing to the first exhaust gas purification device 24 is raised, and the DPF 24a is warmed.

  In S103, it is determined whether or not the engine coolant temperature of the internal combustion engine 1 is equal to or higher than a first predetermined temperature T1. If it is determined in S103 that the engine coolant temperature is equal to or higher than the first predetermined temperature T1, the process proceeds to S104. On the other hand, if it is determined in S103 that the engine coolant temperature is not equal to or higher than the first predetermined temperature T1, the process returns to S102.

  In S104, the burner apparatus 100 is turned off and combustion in the burner apparatus 100 is stopped.

  In S105, it is determined whether or not the DPF floor temperature of the first exhaust purification device 24 is lower than the second predetermined temperature T2. The DPF floor temperature is detected by a DPF floor temperature sensor 25 electrically connected to the ECU 31. If the second predetermined temperature T2 is a temperature lower than that, it can be determined that the DPF floor temperature when the DPF 24a of the first exhaust purification device 24 is not in the active state is low. Desired. If it is determined in S105 that the DPF floor temperature is lower than the second predetermined temperature T2, the process proceeds to S106. On the other hand, if it is determined in S105 that the DPF floor temperature is not lower than the second predetermined temperature T2, the process proceeds to S109.

  In S106, the burner apparatus 100 is turned on and combustion is performed by the burner apparatus 100. Thereby, the temperature of the exhaust gas flowing to the first exhaust gas purification device 24 is raised, and the DPF 24a is warmed.

  In S107, it is determined whether or not the DPF floor temperature of the first exhaust purification device 24 is equal to or higher than a second predetermined temperature T2. If it is determined in S107 that the DPF floor temperature is equal to or higher than the second predetermined temperature T2, the process proceeds to S108. On the other hand, if it is determined in S107 that the DPF floor temperature is not equal to or higher than the second predetermined temperature T2, the process returns to S106.

  In S108, the burner apparatus 100 is turned off and combustion in the burner apparatus 100 is stopped.

  In S109, it is determined whether or not the PM accumulation amount on the DPF 24a of the first exhaust purification device 24 is equal to or greater than a predetermined amount C. Whether the PM accumulation amount is equal to or greater than the predetermined amount C is determined by the fact that the differential pressure by the differential pressure sensor 26 electrically connected to the ECU 31 is equal to or greater than the predetermined pressure. The predetermined amount C is an amount that causes the exhaust pressure of the internal combustion engine 1 to increase and hinder the operation of the engine when the PM accumulation amount exceeds that. When it is affirmed in S109 that the PM accumulation amount is equal to or greater than the predetermined amount C, the process proceeds to S110. On the other hand, if it is determined in S109 that the PM accumulation amount is not equal to or greater than the predetermined amount C, this routine is temporarily terminated.

  In S110, the burner device 100 is turned on, combustion is performed in the burner device 100, and filter regeneration control is performed. Thereby, the temperature of the exhaust gas flowing to the first exhaust gas purification device 24 is raised, the temperature of the first exhaust gas purification device 24 is raised, and the PM collected by the DPF 24a is oxidized and removed.

  In S111, it is determined whether or not the filter regeneration control is finished. The end of the filter regeneration control can be determined by the combustion time of the burner device 100 or the like. If it is affirmed in S111 that the filter regeneration control has been completed, the process proceeds to S112. On the other hand, when it is determined negative in S111 that the filter regeneration control has not ended, the process returns to S110.

  In S112, the burner apparatus 100 is turned off and combustion in the burner apparatus 100 is stopped. After the processing of this step, this routine is once ended.

  According to the routine described above, the DPF 24a can be warmed or the filter regeneration control can be performed by the burner device 100.

<Example 2>
Next, Example 2 will be described. In the present embodiment, the configuration of the burner device 100a different from the above embodiment will be described, and the description of the same parts as those in the above embodiment will be omitted.

  FIG. 6 shows the appearance of the burner device 100a of the internal combustion engine 1 according to this embodiment. FIG. 7 shows a schematic configuration of the burner device 100a of the internal combustion engine 1 according to the present embodiment. As shown in FIG. 6, the burner device 100a is fixed to a part of the exhaust pipe 8a constituting the exhaust passage 8 in a state where most of the main body upper part 101 and the lower part of the main body 102 are exposed from the exhaust pipe 8a.

  The burner device 100a includes an air introduction part 104, a fuel injection nozzle 105, and an electrode 106 in the upper part 101 of the main body covered with the upper case 103, as in the above embodiment. A bottomed tubular body 108 serving as a burner combustion chamber in which the inside actually burns to raise the temperature of exhaust gas is provided in the lower part 102 of the main body covered with the lower case 107 at a portion exposed from the exhaust pipe 8a.

  The lower part 102 of the main body of the burner device 100a is connected to the lower case 107 outside the bottomed tubular body 108 by branching the exhaust path 8 from the upstream side of the exhaust flow with respect to the position of the bottomed tubular body 108 in the exhaust passage 8. And an exhaust supply passage 115 for supplying exhaust gas from the exhaust passage 8 to the burner combustion chamber. The exhaust supply passage 115 is connected to the upstream side of the exhaust flow of the lower case 107 so that the exhaust of the exhaust passage 8 can be supplied into the lower case 107 as much as possible. As a result, the exhaust gas flowing through the exhaust passage 8 from the exhaust supply passage 115 to the exhaust intake ports 113 and 114 of the bottomed tubular body 108 can be guided and taken into the burner combustion chamber. For this reason, it becomes easy to take in oxygen in exhaust gas by a burner combustion chamber, and combustion in a burner combustion chamber can be stabilized more.

  The bottomed cylindrical body 108 has an axis protruding from the exhaust passage 8 with respect to the exhaust flow direction of the exhaust passage 8 and the direction perpendicular to the exhaust flow direction of the exhaust passage 8. It is inclined to become. For this reason, the whole burner apparatus 100a of the present embodiment is also inclined and arranged like the bottomed cylindrical body 108. Thus, the axis of the bottomed cylindrical body 108 is inclined with respect to the exhaust flow direction of the exhaust passage 8 and the direction perpendicular to the exhaust flow direction of the exhaust passage 8, so that the burner device 100 a protrudes outside the exhaust passage 8. The height to do can be made low. For this reason, it becomes easy to ensure the installation space of the burner apparatus 100a, and it becomes advantageous on mounting to the internal combustion engine 1.

  Thus, in the present embodiment, the burner device 100a is inclined so that the upper part of the burner device 100a protruding from the exhaust passage 8 is on the upstream side of the exhaust flow, and has the exhaust supply passage 115. The depth D2 protruding into 8 can be made shallower than in the above embodiment. As a result, in the burner device 100a of the present embodiment, it is difficult to reduce the cross-sectional area of the exhaust passage 8, and it is difficult to block the exhaust flow in the exhaust passage 8, and the increase in the exhaust pressure of the internal combustion engine 1 can be suppressed.

  The burner device for an internal combustion engine according to the present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Internal combustion engine 4 Fuel injection valve 5 Supply pump 6 Engine cooling water temperature sensor 7 Intake passage 8 Exhaust passage 8a Exhaust pipe 9 Turbocharger 9a Compressor 9b Turbine 21 Air tank 24 First exhaust purification device 24a DPF
25 DPF floor temperature sensor 26 Differential pressure sensor 31 ECU
100, 100a Burner device 101 Main body upper part 102 Main body lower part 103 Upper case 104 Air introduction part 105 Fuel injection nozzle 106 Electrode 107 Lower case 108 Bottomed cylindrical body 109 Air introduction port 110 Air passage 111 Inner cylinder 112 Outer cylinder 113, 114 Exhaust Intake 115 Exhaust supply passage

Claims (4)

A burner device for an internal combustion engine that is provided in an exhaust passage of the internal combustion engine and raises the temperature of exhaust gas flowing through the exhaust passage,
Air supply means for supplying air to the burner combustion chamber;
Fuel supply means for supplying fuel to the burner combustion chamber;
Ignition means for igniting the air-fuel mixture in the burner combustion chamber;
With
The burner combustion chamber is formed inside a bottomed cylindrical body protruding into the exhaust passage,
A burner device for an internal combustion engine, wherein a plurality of exhaust intake ports for taking in exhaust gas flowing through the exhaust passage into the burner combustion chamber are provided on a peripheral surface of the bottomed cylindrical body. The bottomed cylindrical body is a double cylinder having an inner cylinder and an outer cylinder that covers the inner cylinder with a gap between the inner cylinder and the inner cylinder;
The burner device for an internal combustion engine according to claim 1, wherein the exhaust intake port is provided in both the inner cylinder and the outer cylinder.   The exhaust passage is branched from the exhaust flow upstream side of the position where the bottomed cylindrical body of the exhaust passage is disposed, and is connected to the outside of the bottomed cylindrical body, and the exhaust of the exhaust passage is transferred to the burner combustion chamber. The burner device for an internal combustion engine according to claim 1, further comprising an exhaust supply passage for supplying the exhaust gas.   The axis of the bottomed cylindrical body is inclined with respect to an exhaust flow direction of the exhaust passage and a direction perpendicular to the exhaust flow direction of the exhaust passage. A burner device for an internal combustion engine.

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