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Method and system for protecting dual mass flywheel in hybrid vehicle and terminal
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A hybrid vehicle and dual-mass flywheel technology, applied in hybrid vehicles, motor vehicles, transportation and packaging, etc., can solve problems such as DMF damage and failure, and achieve the effect of preventing impact torque and avoiding damage
Active Publication Date: 2019-08-09
ZHEJIANG GEELY HOLDING (GROUP) CO LTD +1
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Abstract
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[0006] Compared with the 12V starting method of the traditional power 7DCT, P2.5 architecture vehicles have three starting methods: battery 12V starting, clutch starting and high-voltage motor starting; more starting conditions, more driving conditions and possibilities for DMF The nature makes the DMF enter the speed resonance range, which causes the damage and failure of the DMF
Method used
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Embodiment 1
[0054] see figure 2 . As shown in the figure, this embodiment discloses a method for protecting a dual-mass flywheel in a hybrid vehicle, including the following steps:
[0055] S201. When the engine is turned off, determine whether a start command is received;
[0056] S202. If yes, execute the startup instruction;
[0057] S203. Judging whether the starting command is a clutch starting command;
[0058] S204. If yes, determine whether an emergency braking instruction is received within a preset time range after executing the start instruction;
[0059] In practical applications, generally, when the start command is executed, that is, at the instant when the clutch is started, it is judged whether an emergency braking command is received;
[0060] S205. If yes, determine whether the rotational speed of the clutch drive shaft is within the first preset rotational speed range;
[0061] In practical applications, generally, the rotation speed of the clutch drive shaft is r...
Embodiment 2
[0071] Such as image 3 As shown, this embodiment discloses a method for protecting a dual-mass flywheel in a hybrid vehicle, including the following steps:
[0072] S301. When starting the vehicle, determine whether the engine speed is within the second preset speed range;
[0073] In practical applications, generally, the second preset speed range refers to the resonance speed region of the dual-mass flywheel, and when the engine speed falls into this region, it will cause DMF resonance; the resonance speed region of the dual-mass flywheel is related to the characteristics of the flywheel , so the resonance speed region is not fixed. The second preset speed range in this embodiment is 100-750rpm, and this value can also be adjusted according to the actual situation;
[0074] S302. If so, judge whether the duration of the engine speed within the second preset speed range exceeds a preset threshold; at this time, the vehicle has not been started normally, and the vehicle spe...
Embodiment 3
[0086] This embodiment discloses a method for protecting a dual-mass flywheel in a hybrid vehicle, including the following steps:
[0087] When the engine is turned off, it is judged whether a starting command is received; the starting command also includes a clutch starting command, a 12V battery starting command and a high voltage battery starting command (high voltage refers to a voltage higher than 300V),
[0088] If so, execute the start instruction;
[0089] judging whether the start command is a clutch start command;
[0090] If yes, determine whether an emergency braking instruction is received within a preset time period after executing the start instruction;
[0091] If so, judge whether the rotational speed of the clutch drive shaft is within a preset range;
[0093] In some embodiments, fuel is supplied to the engine when the rotational speed of the clutch drive shaft is not within a predetermined range;
...
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Abstract
The invention discloses a method and system for protecting a dual massflywheel in a hybrid vehicle and a terminal. The method for protecting the dual massflywheel in the hybrid vehicle comprises thesteps of judging whether a starting instruction is received or not when an engine flames out; if the starting instruction is received, executing the starting instruction; judging whether the startinginstruction is a clutch starting instruction or not; if the starting instruction is the clutch starting instruction, judging whether an emergency brake instruction is received or not within a presettime range after the starting instruction is executed; if the emergency brake instruction is received within the preset time range after the starting instruction is executed, judging whether a rotation speed of a clutch dragging shaft falls within a first preset rotation speed range or not; and if the rotation speed of the clutch dragging shaft falls within the first preset rotation speed range, cutting off fuel supply in the engine. According to the method for protecting the dual massflywheel in the hybrid vehicle, a dual mass flywheel protection strategy is set for a clutch starting mode inthe hybrid vehicle; when the vehicle flames out at a low speed, is restarted through a clutch and braked in an emergency at the moment that the clutch is started, the dual mass flywheel is preventedfrom generating larger impact torque by cutting off the fuel supply in the engine; and therefore, the damage to the dual mass flywheel is avoided.
Description
technical field [0001] The invention relates to the technical field of protecting a dual-mass flywheel, in particular to a protection method, system and terminal for a dual-mass flywheel in a hybrid vehicle. Background technique [0002] As consumer demands for comfortable and quiet vehicles gradually increase, active research on vibration and noise reduction is being conducted to improve consumer satisfaction. However, lightweight and high horsepower vehicles have poor performance in reducing vehicle vibration and noise. [0003] When the irregular vibration of the torque generated from the engine is transmitted to the drive system, the vibration and noise from the vehicle drive system vibrate the entire vehicle, in order to reduce the vibration and noise in the drive system, a dual-mass flywheel system is applied to make the generated from the engine The vibration of the torque transmitted to the drive system is minimized. [0004] Dual-mass flywheel (DMF) is a device co...
Claims
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Application Information
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