The invention relates to a vacuum pump on-off threshold self-learning method, which is used for a new energy automobile and comprises the following steps of: obtaining a vacuum pump initial on threshold and a vacuum pump initial off threshold; electronic vacuum pump fault detection: detecting whether a vacuum pump has a leakage fault and detecting whether a brake pedal is stepped on; in the switching cycle process of the vacuum pump, the vacuum pump has no leakage fault and does not step on a brake pedal, the vacuum degree change rate in unit time is calculated, and when the vacuum degree change rate is smaller than a preset value and the vacuum degree is maintained for preset time or the continuous operation time of the vacuum pump reaches the preset time, the vacuum pump is closed, and the vacuum degree value of the vacuum pump at the moment is read; updating the opening and closing threshold values of the vacuum pump according to the vacuum degree at the moment; compared with the prior art, the loss of the pump body can be reduced; the accuracy is high, the change process of atmospheric pressure does not need to be considered, the switching strategy is adjusted in time, the brake pedal feeling is improved, and the driving safety is improved.
本发明涉及了一种真空泵开关阈值自学习方法,用于新能源汽车上,包括以下步骤:获得真空泵初始开启阈值以及真空泵初始关闭阈值;电子真空泵故障检测,检测真空泵是否存在泄露故障,检测是否踩制动踏板;在真空泵开关循环过程中,真空泵无泄露故障且未踩制动踏板,计算单位时间内真空度变化率,当真空度的变化率小于预设值,且真空度维持预设时间或者真空泵持续运行时间达到预设时间,则关闭真空泵,读取此时的真空泵的真空度数值;根据此时的真空度对真空泵开启和关闭阈值进行更新;区别于现有技术,本发明可以减少泵体损耗;准确率高,且无需考虑大气压力的变化过程,及时调整开关策略,改善制动踏板感,提高驾驶的安全性。
Vacuum pump switch threshold value self-learning method, storage medium and electronic equipment
一种真空泵开关阈值自学习方法、存储介质及电子设备
2024-01-09
Patent
Electronic Resource
Chinese
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