Exhaust purification system for internal combustion engines
A technology of exhaust purification and exhaust purification device, which is applied in the direction of internal combustion piston engine, exhaust device, exhaust treatment, etc., can solve the problems of complex structure, large size, deterioration of burner mountability, etc., and achieve the promotion of heating and stability The effect of flame formation
Inactive Publication Date: 2015-07-29
TOYOTA JIDOSHA KK
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Problems solved by technology
However, when the combustion chamber is formed in such a structure, since the structure is complicated and the size is large, there is a problem that the mountability of the combustor on a vehicle or the like deteriorates.
Method used
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Embodiment Construction
[0038] Hereinafter, specific embodiments of the present invention will be described based on the drawings. The dimensions, materials, shapes, and relative arrangements of components described in this embodiment do not mean that the technical scope of the invention is limited thereto unless otherwise specified.
[0039]
[0040] Here, a case where the present invention is applied to an exhaust purification system of a diesel engine for driving a vehicle will be described as an example. In addition, the internal combustion engine according to the present invention is not limited to a diesel engine, and may be a gasoline engine.
[0041](Schematic configuration of the intake and exhaust system of the internal combustion engine 1)
[0042] figure 1 It is a diagram showing a schematic configuration of the intake and exhaust system of the internal combustion engine according to the present embodiment. The internal combustion engine 1 is a diesel engine for driving a vehicle. ...
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An object of the invention is to achieve improved heating of the exhaust gas purification apparatus without making the structure of a burner complex or bulky. The system according to the invention is equipped with a burner 20 arranged in an exhaust passage upstream of an exhaust gas purification apparatus 6 and having a burner combustion chamber in which flame is produced. At the time of raising the temperature of the exhaust gas purification apparatus 6, the burner 20 is caused to produce flame that extends from the interior of the burner combustion chamber to the interior of the exhaust passage 3 upstream of the exhaust gas purification apparatus 6 when the flow rate of the exhaust gas is not higher than a predetermined flow rate, and the burner 20 is caused to make the size of the flame produced in the interior of the exhaust passage 3 smaller than when it is determined that the flow rate of the exhaust gas is not higher than the predetermined flow rate or to produce flame only in the interior of the burner combustion chamber when it is determined that the flow rate of exhaust gas is higher than the predetermined flow rate.
Description
technical field [0001] The present invention relates to an exhaust purification system of an internal combustion engine including a burner for raising the temperature of an exhaust purification device. Background technique [0002] In the exhaust passage of an internal combustion engine, there is known a technique in which a burner for raising the temperature of the exhaust purification device composed of an exhaust purification catalyst and a particulate filter is provided on the upstream side (for example, Refer to Patent Documents 1 and 2). This type of burner has a burner combustion chamber, and by combusting supplied fuel in the burner combustion chamber, the temperature of exhaust gas flowing into the exhaust purification catalyst is raised. [0003] Patent Document 3 discloses a combustor capable of taking in exhaust gas and burning it by diverting part of the exhaust gas from the main flow. In addition, Patent Document 3 describes a technique in which a burner is a...
Claims
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IPC IPC(8): F01N3/02F01N3/20
CPCY02T10/26F01N9/00F01N3/0256F01N3/36F01N3/2033F01N2900/1411F01N2900/1602Y02T10/47F01N2240/14F01N2340/02F01N3/38Y02T10/12Y02T10/40
Inventor 广田信也见上晃利冈俊祐伊藤和浩福田光一朗
Owner TOYOTA JIDOSHA KK