Split-type supercharger for a turbocharged engine

Abstract

The invention relates to a split supercharger of a turbo supercharged engine and is used for realizing the matching of the air inlet pressure of the engine and the work condition of the engine. The split supercharger consists of an air compressor, a turbine and an intermediate body and is characterized in that the intermediate body is in a split structure and comprises an air compressor end intermediate body, a turbine end intermediate body, an intermediate body casing, a rolling wheel turntable type stepless speed changer and a driving motor, the air compressor end intermediate body and the turbine end intermediate body are connected through the intermediate body casing, the intermediate body casing is connected with the driving motor through a gear engaging mechanism, and the rolling wheel turntable type stepless speed changer is arranged in an inner cavity of the intermediate body casing. The split supercharger has the advantages that the structure is simple, the manufacture cost is low, the work noise is low, the split supercharger can be matched with different work conditions of the engine, the efficiency of the engine is improved, and the NVH (noise, vibration and harshness) performance of the engine is improved.

Description

technical field [0001] The invention relates to a supercharger for a turbocharged engine, in particular to a split type supercharger for a turbocharged engine, and belongs to the technical field of combustion engines. Background technique [0002] Since the power of the engine is proportional to the amount of air (or mixture) supplied to the cylinder, and under the condition of constant cylinder volume and engine speed, the amount of air (or mixture) supplied to the cylinder is proportional to the air density , Therefore, the power of the engine can be increased by pre-compressing the air entering the cylinder, which is the theoretical basis of the engine supercharging technology. [0003] Exhaust gas turbocharging uses part of the exhaust energy of the engine to drive the supercharger to increase the density of the air entering the cylinder, thereby improving the power performance of the engine. It has been widely used in automobile engines at present. In the existing exha...

AI Technical Summary

Problems solved by technology

Due to the large fluctuation of the exhaust gas energy generated by the engine under specific working conditions, the supercharger valve plate will vibrate, and the valve will be knocked to produce noise; and when the vehicle is running suddenly and suddenly brakes, the throttle valve will be closed quickly, and the pressure will be reduced. The gas pressure in the casing rises rapidly, and the intake bypass valve opens at this time, and the high-pressure gas produces noise when passing through the intake bypass valve, which adversely affects the driving comfort of the vehicle

In addition, the control form of the existing turbocharger is difficult to match all the working conditions of the engine. It is necessary to install two superchargers, one large and one small, which complicates the structure and increases the cost of manufacturing and after-sales maintenance.

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