Noise control method and device for electronic control turbocharger

Abstract

The invention discloses a noise control method and device for an electronic control turbocharger. The method comprises the steps that gear information and motion working condition information are obtained; if the current gear is the non-power gear and the movement working condition is the acceleration working condition, limiting the required torque value of an electric control turbine to be smaller than a first threshold value through a first electric control turbine control strategy so as to ensure that a bypass valve of the supercharger is in an open state; wherein the first threshold value is a torque value when the electric control turbine does not use the supercharger for supercharging. It can be seen that actually, the bypass valve of the supercharger is kept in the open state by adjusting the torque requirement of the electric control turbine at the non-power gear, so that the situation that noise is generated when the bypass valve is opened again after the bypass valve of the supercharger is closed is avoided, and then noise is fundamentally avoided under the condition that extra cost does not need to be increased.

Description

technical field [0001] The present application relates to the field of turbine control, and in particular, to a method and device for noise control of an electronically controlled turbocharger. Background technique [0002] In an electronically controlled turbocharger, the working state of the supercharger valve stem is controlled by the torque demand of the electronically controlled turbine. In the acceleration condition of non-power gear, the accelerator opening is large, and the corresponding torque demand is also large. At this time, the executive motor in the supercharger will push the booster valve stem to close the bypass valve until the engine speed reaches the limit. At high speed, the torque demand of the electronically controlled turbine is reduced, and the boost valve stem in the supercharger will quickly open the bypass valve. [0003] When the supercharger is working, the temperature of the rocker arm of the bypass valve and the end face of the bushing is very...

AI Technical Summary

Problems solved by technology

However, when the boost lever quickly opens the bypass valve, the rocker arm of the bypass valve rotates relative to the bushing. Due to the gap between the two, noise is likely to be generated, which affects the driving experience.

[0004] At present, in order to solve this noise problem, the noise is usually improved by adding elastic gaskets in the gap to make up for the noise, but because the elastic gaskets are worn at high temperature, the elastic gaskets need to be replaced frequently, resulting in high cost

Moreover, elastic gaskets can only reduce the generation of noise to a certain extent, but cannot completely solve the problem of noise generation.

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