The invention provides a braking safety protection mode switching control method of a power split type hybrid power truck. A second clutch is pre-charged, and when pre-charging is completed and a rotating speed difference between an engine and a second motor is within a set interval C, the second clutch is controlled to slide and drag the engine; a transmission torque of the second clutch is controlled to be reduced to 0; then the engine is controlled to start injecting oil; the rotating speed of the engine is increased by controlling a required torque of the engine; the transmission torque ofthe second clutch is controlled to enable an engine rotating speed to gradually approach a second motor rotating speed; and then the second clutch is controlled to be closed, the first clutch is pre-charged, when pre-charging of the first clutch is completed and an absolute value of the rotating speed difference between the engine and a planet carrier is less than a set threshold value H, the transmission torque of the first clutch is controlled to enable the rotating speed of the planet carrier to be gradually close to the rotating speed of the engine, and finally a vehicle control unit makes the first clutch be closed. The method is simple and feasible, and driving safety and system reliability are improved.
本发明提供了一种功率分流式混合动力卡车制动安全保护模式切换控制方法,对第二离合器进行预充并在其预充完成且发动机与第二电机的转速差在设定区间C内时,控制第二离合器滑摩拖拽发动机,之后控制第二离合器传递扭矩降低至0,接着控制发动机开始喷油,并通过控制发动机需求扭矩增加发动机转速,再控制第二离合器传递扭矩使得发动机转速逐渐接近第二电机转速,再然后控制第二离合器闭合,对第一离合器进行预充并在其预充完成且发动机与行星架的转速差绝对值小于设定阈值H内时,控制第一离合器传递扭矩使得行星架转速逐渐接近发动机转速,最后整车控制器控制第一离合器闭合。本发明方法简单可行,提高了驾驶安全性和系统可靠性。
Braking safety protection mode switching control method for power split type hybrid power truck
功率分流式混合动力卡车制动安全保护模式切换控制方法
25.08.2020
Patent
Elektronische Ressource
Chinesisch
IPC: | B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion |
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