A power source torque distribution method and device for a plug-in hybrid electric vehicle

A hybrid vehicle and torque distribution technology, applied in hybrid vehicles, motor vehicles, control devices, etc., can solve problems such as power system jitter, improve driving experience, avoid slow torque changes, and improve driving smoothness.

Active Publication Date: 2020-08-04
SAIC MOTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention proposes a power source torque distribution method and device for a plug-in hybrid electric vehicle, in order to solve the technical problem that the power system is likely to vibrate during the torque reduction and torque increase process

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  • A power source torque distribution method and device for a plug-in hybrid electric vehicle

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Embodiment Construction

[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0052] Powertrain Input Shaft Structural Parts of Plug-in Hybrid Electric Vehicles figure 1As shown, in the power system structure, there are three power sources: TM (Traction Motor, drive motor), ISG, ICE (internal combustion engine, internal combustion engine). ISG and ICE are rigidly connected, C1 is a normally open clutch, and C2 is a normally closed clutch. The power sources at the C1 end include ISG and ICE. By changing the control strategy of the torqu...

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Abstract

The invention discloses a power source torque distribution method and device for a plug-in hybrid electric vehicle. The method comprises the steps: receiving a lifting torque command for an input shaft, limiting the torque change rate of an engine, and controlling the torque of an ISG, so that the actual torque of the input shaft is consistent with a target instruction torque. The torque change rate of the engine is limited and the residual torque demand of the input shaft is provided by the ISG; the torque response of the ISG is fast, so that the problems that the torque change is slow and the power interruption time is too long due to the slow torque response of the engine can be avoided, the driving smoothness of a vehicle is improved, and then the driving experience of a driver is improved.

Description

technical field [0001] The present invention relates to the technical field of power source control, and more specifically, relates to a power source torque distribution method and device for a plug-in hybrid electric vehicle. Background technique [0002] With the increasing emphasis on energy security and environmental protection, countries have become more and more strict on vehicle emissions. It has become a general trend to bring energy vehicles to the market. Among them, hybrid electric vehicles with relatively mature technology have good potential at this stage. [0003] There are multiple power sources in the power system of plug-in hybrid electric vehicles, and the power sources need to be adjusted during the process of gear shifting and mode switching to meet the different driving needs of drivers. Before and after the speed regulation of the power source, it is necessary to reduce the torque and increase the torque of the power source respectively. Torque reduc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W20/10B60W30/20B60W10/06B60W10/08
CPCB60W10/06B60W10/08B60W20/10B60W30/20B60W2030/206B60W2710/0672B60W2710/083Y02T10/62
Inventor 赵沂周文竞姜丰伟张鹏君罗翔
Owner SAIC MOTOR
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