Exhaust gas recirculation system
A recirculation system and exhaust gas technology, which is applied in the direction of exhaust gas recirculation, charging system, and adding non-fuel substances to fuel, etc., can solve problems such as compressor failure, rotating shaft and bearing wear, and achieve the purpose of suppressing uneven distribution of flow velocity Effect
Active Publication Date: 2013-05-22
MITSUBISHI MOTORS CORP
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Problems solved by technology
[0006] As a result, since a force is applied to the compressor in a direction transverse to the rotary shaft of the compressor, it is considered that the compressor contacts the housing housing the compressor, thereby generating wear due to the contact and creating a gap between the rotary shaft and the bearing. wear, leading to compressor failure
Method used
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Embodiment Construction
[0035] will resort to Figure 1 to Figure 7 An exhaust gas recirculation system according to a first embodiment of the present invention is described. As an example, the exhaust gas recirculation system of this embodiment is used in an engine system 10 including a reciprocating diesel engine 11 . Engine system 10 is installed in a motor vehicle (not shown).
[0036] figure 1 is a schematic diagram showing the engine system 10 . Such as figure 1 As shown, the engine system 10 includes a reciprocating diesel engine 11, an air intake system 20 for introducing intake air into the diesel engine 11, an exhaust system 30 for directing exhaust gases from the diesel engine 11 to the exterior of the motor vehicle, and a turbocharger. device 70.
[0037] In this embodiment, a diesel engine 11 is composed of a cylinder block 12, a cylinder head 13, etc., and constitutes a part of an engine system 10 that does not have an intake passage for introducing intake air into a cylinder 14 (a...
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An exhaust gas recirculation system includes an induction passageway (23) through which fresh air flows and an annular flow path (62) extending in a circumferential direction of the induction passageway (23) and formed in an annular shape. The annular flow path (62) encompasses the induction passageway (23) therein. An inlet port (63) is formed between the induction passageway (23) and the annular flow path (62) and communicates the induction passageway with the annular flow path. An exhaust gas introduction flow path (80) is communicated with the annular flow path (62) and introduces the exhaust gases into the annular flow path (62) so that the exhaust gases flow in one direction of the circumferential direction. The annular flow path (62) has an inner face facing the inlet port (63), and the inner face has a width (w2) in a direction crossing the one direction. An upstream side of the width (w2) is shorter than a downstream side of the width (w2) with respect to a flow of the exhaust gasses which flows into the annular flow path (62) from the exhaust gas introduction flow path (80).
Description
technical field [0001] The present invention relates to the technology of an exhaust gas recirculation system for introducing exhaust gas into an induction system. Background technique [0002] Conventionally, an exhaust gas recirculation system has been proposed for returning a portion of exhaust gas to an intake system to improve fuel economy in a low-load region of an engine and reduce nitrogen oxides (NOx). The exhaust gas recirculation system includes a recirculation passage that directs exhaust gas into the intake system. The recirculation passage is connected with the intake passage through which fresh air flows into the intake system. [0003] Fresh air is mixed with EGR (Exhaust Gas Recirculation) gas at the connecting portion between the intake passage and the recirculation passage. A mixture of fresh air and EGR gas flows downstream of the connecting portion. The connection configuration between the intake passage and the recirculation passage will be specifica...
Claims
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IPC IPC(8): F02M25/07
CPCF02M25/0727F02M25/0718F02M25/0709F02M25/0722Y02T10/121F02M25/0707F02M26/05F02M26/06F02M26/15F02M26/19F02M26/23F02M26/35
Inventor 矶部雄辅木村洋之前原和人
Owner MITSUBISHI MOTORS CORP