Method and device for torque control of hybrid electric vehicle and hybrid electric vehicle

A hybrid electric vehicle, torque control technology, applied in the field of hybrid electric vehicle, hybrid electric vehicle torque control, can solve the problem of inability to respond to torque demand in a timely manner, poor power economy and drivability, poor driving experience for drivers and passengers, etc. problems, to achieve timely response, wide range of applications, and excellent driving performance

CN111873983BActive Publication Date: 2022-03-25BAIC MOTOR CORP LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2022-03-25

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Abstract

The invention discloses a method and device for torque control of a hybrid electric vehicle and a hybrid electric vehicle. The invention relates to the field of vehicle control. The method includes: obtaining the required torque at the wheel end; combining the required torque at the wheel end, power system parameters and The power consumption demand of high-voltage accessories determines the target operation mode. The target operation mode is a mode that meets the current vehicle drive power requirements and the power consumption requirements of high-voltage accessories of the vehicle; in the target operation mode, the respective torques of the engine and the drive motor are controlled so that the hybrid The power car achieves the target power economy. The torque control method of the embodiment of the present invention is beneficial to improve the economical efficiency of the whole vehicle and at the same time give priority to satisfying the torque demanded by the wheel ends, that is, the torque demanded by the driver. And it has high modularization and generalization, a wide range of applications, and high practicability.
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Description

technical field

[0001] The invention relates to the field of vehicle control, in particular to a method and device for torque control of a hybrid electric vehicle and a hybrid electric vehicle. Background technique

[0002] A hybrid vehicle refers to a vehicle driven by a hybrid power system. A hybrid power system refers to a system that consists of two or more power sources with different working principles and combines different power sources to drive the vehicle. The purpose of the hybrid vehicle is to make use of the respective strengths of the engine and the drive motor to make up for the requirements of economy, emission and driving range that cannot be achieved by a single power source, and has a good application prospect.

[0003] At present, according to the general hybrid system classification, the plug-in hybrid is a strong hybrid system because of the high energy of the power battery, and the power of the drive motor accounts for a large proportion of the total p...

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Embodiment Construction

[0075] In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, only a part of the embodiments of the present invention, but not all of the embodiments, and are not used to limit the present invention.

[0076] The inventor found that the torque control strategy of the current hybrid vehicle is mostly determined by the vehicle speed and the SOC of the battery. For example: when the battery power is high enough to fully meet the speed requirement, enter the pure electric drive mode, and use the output torque of the drive motor to meet the torque demanded by the wheel; Hybrid drive mode, in which the engine and drive motor jointly meet the torque demand at the wheel end.

[007...