A control method, system and vehicle for series switching hybrid mode
A series switching and control method technology, applied in hybrid vehicles, motor vehicles, transportation and packaging, etc., can solve the problems of excessive difference between engine speed and transmission input shaft speed, drag feeling, poor ride comfort, etc. , to achieve the effect of improving ride comfort and improving drag
Active Publication Date: 2021-08-10
BYD CO LTD
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Problems solved by technology
Among them, the inventors found that in the process of switching between series and hybrid modes, the engine speed and the speed of the input shaft of the transmission device are inconsistent. The clutch engagement process will produce a sense of drag, resulting in poor ride comfort of the vehicle
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[0021] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention. On the contrary, the embodiments of the present invention include all changes, modifications and equivalents coming within the spirit and scope of the appended claims.
[0022] Hybrid vehicles are becoming more and more common in our daily lives. The inventors have found that hybrid vehicles generally include two driving modes, series and hybrid. In the series mode, the engine outputs power to the generator to generate electricity, and the power generated by the generator is provided to the motor or the power battery. The elect...
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The present invention provides a control method for switching the hybrid mode in series for a vehicle, which includes receiving a signal for switching the hybrid mode in series, and obtaining the first rotational speed difference between the rotational speed of the engine and the rotational speed of the input shaft of the transmission device; and then obtaining the first power generation torque of the generator ; Adjusting the generating torque of the generator according to the first generating torque of the generator; adjusting the engine speed, and when it reaches the target speed range, controlling the coupling of the clutch between the engine and the transmission device. Therefore, by adjusting the engine speed to the target speed range in the process of switching between series and hybrid, and then engaging the clutch, the drag feeling caused by the inconsistency between the engine speed and the transmission input shaft speed is improved to a certain extent. , which improves the ride comfort of the vehicle during the switching process between series and hybrid modes.
Description
technical field [0001] The invention belongs to the technical field of vehicle control, and in particular relates to a control method, system and vehicle for serially switching hybrid modes. Background technique [0002] With the continuous improvement of environmental awareness, hybrid vehicles are becoming more and more common in daily life. The inventors have found that current hybrid vehicles generally have series and hybrid driving modes. In the series mode, the clutch between the engine and the drive shaft is disconnected, the engine drives the generator to generate electricity, and the motor drives the vehicle to run; in the hybrid mode Next, the clutch between the engine and the transmission is combined, and the output power of the engine participates in the driving of the vehicle. Among them, the inventors found that in the process of switching between series and hybrid modes, the engine speed and the speed of the input shaft of the transmission device are inconsis...
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IPC IPC(8): B60W20/20B60W20/40
CPCB60W20/20B60W20/40
Inventor 喻航周剑锋
Owner BYD CO LTD