Flow area variable turbosuperchager

Abstract

The invention relates to a flow area variable turbosuperchager, and belongs to the field of diesel engine equipment. A six-cylinder supercharged diesel engine of the flow area variable turbosuperchager is connected with an intake manifold, and every three cylinders in the six-cylinder supercharged diesel engine are connected with a first exhaust manifold and a second exhaust manifold; and each first exhaust manifold is connected with the turbine end through a first runner, and each second exhaust manifold is connected with the turbine end through a second runner. The flow area variable turbosuperchager is characterized in that the first runners and the second runners are arranged side by side, the first runners and the second runners are connected with a turbine shell and correspond to airways in the turbine shell, and a valve is arranged between each first runner and the corresponding second runner; and the valve controls waste gas pressure of the first runners and the second runners. The flow area variable turbosuperchager is suitable for the supercharged diesel engine adopting the high pressure EGR scheme. The flow area of the runners inside the supercharger is adjusted throughthe valve, the pressure of the corresponding exhaust manifolds is accordingly achieved, and EGR smooth guiding-in is achieved; meanwhile, the low average pumping loss is kept; and the turbosuperchager can be matched with an EGR valve to achieve flexible adjustment on the EGR rate.

Description

technical field [0001] The invention relates to a turbocharger with variable channel area, which belongs to the field of diesel engine equipment. Background technique [0002] For heavy-duty diesel engines, in order to achieve National V and National VI emissions, EGR technology is one of the feasible solutions. For supercharged diesel engines, not all working conditions can smoothly introduce high-pressure EGR. Generally, a turbocharger with variable cross-section and flow passage area, or other similar methods of changing the flow cross-section of the turbine are used to adjust the pre-vortex pressure, which can smoothly introduce high-pressure EGR. In prior art such as [0003] CN200710006742.5 Turbocharger with variable nozzle area and variable flow path area discloses a turbocharger with variable nozzle and variable flow path area. The disadvantage of this technology is that the turbocharger with variable nozzle and variable flow path area The structure of the devi...

AI Technical Summary

Problems solved by technology

Although these three patents can adjust the cross-section of the supercharger, they cannot adjust the pressure of a certain exhaust manifold separately, and the average pumping loss of the engine is large.

[0005] CN200910017719.5 Turbocharger with variable channel area Asymmetrical split turbine discloses a turbocharger with asymmetric double channel area with variable channel area. The disadvantage of the asymmetrical split turbine in this technology is that the channel is fixed. not adjustable

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