High-temperature protection method for engine cooling water in hybrid vehicle model
High-temperature protection method for engine cooling water in hybrid vehicle model
- Neue Suche nach: ZHANG CHUNJIAO
- Neue Suche nach: ZHENG HANLIN
- Neue Suche nach: LU PAN
- Neue Suche nach: ZHANG CHUNJIAO
- Neue Suche nach: ZHENG HANLIN
- Neue Suche nach: LU PAN
The invention discloses a cooling water high-temperature protection method for an engine in a hybrid vehicle type. According to atmospheric pressure, atmospheric temperature, a time interval from last flameout time of an engine to starting of the engine, the number of combustion times after starting of the engine, the rotating speed of the engine, the ratio of the current cooling water temperature of the engine to an alarm water temperature limit value and the ratio of fire path torque to gas path torque, the engine is started according to the ratio. An engine cooling water high-temperature characteristic value is obtained according to the air-fuel ratio and the EGR rate, and then a vehicle driving characteristic value is obtained according to the ratio of the vehicle speed change rate to the wheel end total request torque change rate; and executing different engine cooling water temperature high-temperature protection strategies according to the engine cooling water high-temperature characteristic value calculated in the driving cycle and the vehicle driving characteristic value, so that the engine is protected under the condition of maintaining certain power of the engine.
本发明公开了一种混动车型中发动机冷却水高温保护方法，该方法根据大气压力、大气温度、从发动机上一次熄火时间到发动机启动前的时间间隔、本次发动机启动后的燃烧次数、发动机转速、当前发动机冷却水温度与报警水温限值的比值、火路扭矩与气路扭矩的比值、空燃比以及EGR率获得发动机冷却水高温特征值，而后根据车速变化率与轮端总请求扭矩变化率的比值得到车辆驾驶特性值，根据驾驶循环中计算得到的发动机冷却水高温特征值和车辆驾驶特性值执行不同的发动机冷却水温高温保护策略，进而实现了在维持发动机一定动力的条件下对发动机的保护。
Dokumentinformationen
High-temperature protection method for engine cooling water in hybrid vehicle model
一种混动车型中发动机冷却水高温保护方法
2022-12-09
Patent
Elektronische Ressource
Chinesisch
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