Double-channel air exhausting device of double-flow channel turbocharger

Abstract

The invention discloses a double-channel air exhausting device of a double-flow channel turbocharger. The air exhausting device comprises a turbine volute, wherein two air inlet flow channels are formed in the turbine volute; the turbine volute is provided with an air exhausting channel which is communicated with the two air inlet flow channels respectively; and an air exhausting valve is arranged at the outlet of the air exhausting channel and is in transmission connection with an execution mechanism on the turbine volute. Mutual influence of exhaust pulses of the two air inlet flow channels of the double-flow channel turbine volute is restrained by a simple device and energy loss caused by the entrance of waste gas into the air exhausting channel when an engine runs at a low speed is reduced. The air exhausting device has a simple structure; an air exhausting port is molded in the casting process of the turbine volute; and compared with a double-air exhausting channel double-air exhausting valve device, the air exhausting device can effectively lower processing and assembly difficulty and cost and contributes to enhancing the sealing performance of the air exhausting valve and the reliability of a bypass air exhausting device of the turbocharger.

Description

technical field [0001] The present invention relates to a waste gas bypass device for a turbocharger, in particular to a bypass exhaust device for a dual-flow turbocharger. Background technique [0002] When the turbocharger of the vehicle engine is working, the exhaust gas discharged from the engine enters the turbine volute of the turbocharger, pushes the turbine impeller to rotate and does work and then discharges. It is then fed into the engine cylinder for combustion, thereby increasing the intake air density of the engine, achieving the purpose of increasing engine power and reducing emissions. [0003] With the tightening of emission regulations and the continuous improvement of people's requirements for engine performance, turbochargers are widely used in diesel engines, and the original fixed section device has been developed to a wastegate device. The supercharger using the waste gas bypass device can move the matching point between the supercharger and the engine...

AI Technical Summary

Problems solved by technology

[0006] Moreover, when the turbocharger is under low-speed engine conditions, the air discharge valve is in a closed state. At this time, the two intake runners are in a closed communication state. After the exhaust pulse of the engine enters one of the intake runners, part of the exhaust gas Under the action of the flow pressure difference, it rushes from the exhaust passage into another intake passage, which causes the exhaust gas of each cylinder of the engine to interfere with each other and is not conducive to maintaining a stable working state of the turbine.

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