Coordinated control method for power switching of coaxial parallel hybrid electric vehicle with engine torque observer

A hybrid vehicle and engine torque technology, which is applied in hybrid vehicles, motor vehicles, control devices, etc., can solve the problems of difficult real-time guarantee, large amount of calculation, poor generality, etc., to improve the classification performance and generalization ability. , Reduce the process of sliding and grinding, reduce the effect of impact

CN105035079BActive Publication Date: 2017-10-20北京勇搏科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2017-10-20

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Abstract

The invention discloses a power switching coordination control method of a coaxial parallel hybrid electric vehicle with an engine torque observer. Based on the method of a least square support vector machine, the testing sampledatum of the engine rack performance aretrained; the distribution estimation algorithm is adopted to optimize the parameter C and Lambda of the least square support vector machine; and through off-line training and optimization to an engine toque module and based on the optimum parameters, the engine torque observer is built. The current throttle value percentage and rotary speed are inputted to acquire a real-time torque value, thus realizing on-line observation to the engine torque. During the switching process of switching a pure electric driving model to a pure engine driving model (different power sources) of the vehicle provided herein, section coordination control is carried out aiming to different power sources, thus realizing stable transition of the whole switching process and stable torque of power system output without fluctuation, and satisfying the requirement of vehicle driving total torque.
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Description

technical field

[0001] The invention relates to a coordinated control method for power mode switching of a hybrid electric vehicle, in particular to a coordinated control method for power switching of a coaxial parallel hybrid electric vehicle with an engine torque observer. Background technique

[0002] Hybrid electric vehicles can realize low-speed pure electric driving and parallel hybrid driving under medium-high speed and heavy load conditions, so that the control of vehicle energy flow and the optimization of energy consumption have greater flexibility, and it is easier to achieve low fuel consumption and low emission goals. However, due to the significant difference in the transient response characteristics of different power sources, switching between vehicle power sources often leads to large changes or sudden changes in the output torque of the power system, resulting in unstable power output and large longitudinal impact on the vehicle. impact, thereby reducing t...

Examples

Embodiment Construction

[0057] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

[0058] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate 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.

[0059] figure 1 It is a simplified structural schematic diagram of a vehicle power transmission system, and only schematically shows components related to the present invention.

[0060] Such as figure 1 The coaxial parallel hybrid vehicle shown includes an engine 1 , a clutch 2 , a gearbox 3 , a drive motor 4 , a final reducer 5 and w...