A method for protecting the conveyor belt in a cvt gearbox

Abstract

The invention discloses a method for protecting a conveying belt in a CVT gearbox. The method comprises the following steps: acquiring a CVT conveying belt slip state signal; and when the acquired signal shows that a CVT conveying belt slips, reducing a basic ignition angle of advance according to a set value. When the CVT conveying belt slips (due to over high rotating speed of an engine), the rotating speed is reduced by reduction of the basic ignition angle of advance, and the conveying belt is protected. According to the method, the development period is short, only ECU software needs to be updated, increasing of costs is not required, and the effect is remarkable.

Description

technical field [0001] The invention relates to the field of automotive electronic control. Background technique [0002] With the continuous improvement of CVT technology, CVT has gradually occupied most of the passenger car market. It is also expected that the number of cars equipped with CVTs will increase rapidly in the future due to improvements in the transmittable torque of CVTs and other technological advances. CVT can not only change the speed ratio continuously, but also can effectively use the power of the engine, continuously output the power, change the speed without impact, and has strong acceleration performance. The transmission part of CVT is mainly based on the belt and pulley system. Because of clutches, conveyor belts, etc., parts can be reduced by about 30%, and assembly efficiency can be increased by about 20%. In addition, the reduction of components directly leads to cost reduction, which is also an important reason why CVT can become the mainstrea...

AI Technical Summary

Problems solved by technology

[0005] 1. Since the protection of mechanical conveyor belts is to increase or change parts, etc., the increase in cost is very prominent, and higher design requirements are put forward for parts, and in the face of design changes, full verification must be carried out to ensure later Are there bigger problems emerging;

[0006] 2. The change from the mechanical design needs to be applied in the later stage. Although the optimization has a certain effect, the effect is not necessarily significant

[0007] 3. Increased development cycle: Facing the increasingly rapid development of science and technology, time represents life for OEMs

If the development cycle is relatively long, the aftermarket will face great pressure when problems arise, and cannot solve problems quickly and effectively

It will have a certain negative impact on the reputation of the whole machine factory

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