Tightness degree intelligent adjusting device for belt of BSG system of hybrid electric vehicle

Abstract

The invention discloses a tightness degree intelligent adjusting device for a belt of a BSG system of a hybrid electric vehicle. The device comprises the BSG system and a belt tightness degree controlsystem. According to the tightness degree intelligent adjusting device, the minimum belt segment tension of the BSG system is set into two gears by a tension controller according to the actual working state (start, rest and normal work) of an engine, different requirements on the belt segment tension under different working conditions of the hybrid electric vehicle are guaranteed, gears can be intelligently switched according to needs, and the response speed is fast; and the BSG system of the design scheme is adopted, and is only in a large tension level at a vehicle start stage, and the BSGsystem is both in a small tension level at most time periods when the vehicle rests and drives normally, so that the service life of the belt is prolonged helpfully.

Description

technical field [0001] The invention relates to the technical field of automobile engines, in particular to an intelligent adjustment device for belt tightness of a BSG system of a hybrid electric vehicle. Background technique [0002] With the development of my country's automobile industry and the implementation of more stringent regulations on energy conservation and emission reduction, new energy vehicles with low or even zero emissions are gaining more and more favor. Among many new energy vehicle solutions, hybrid vehicles have been successfully industrialized. Micro-hybrid systems with a belt-driven integrated starter / generator (ie, BSG) have been widely used in small-displacement vehicles such as passenger cars. Different from the traditional engine accessory drive system, the BSG-containing automotive accessory drive system (ie, BSG system) uses a reversible motor that integrates start-up / power generation functions to replace the traditional generator. When a car ...

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Problems solved by technology

Therefore, the design scheme of arranging an automatic tensioner including two swing arms on both sides of the BSG motor can ensure that there will be no severe slippage when the engine starts, but it will increase the belt tension of the car accessory drive system when it is working normally; and The engine is in normal working state or stopped most of the time, which means that the drive system of the car accessories will always be in a state of high tension, which will greatly shorten the service life of the belt, increase the cost of use and maintenance, and also have certain safety hazards

Moreover, this design method is relatively rough, and it cannot guarantee that the belt tension of the BSG system is at the best level under different working conditions.

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