A Calculation Method of Braking Recovered Energy of Planetary Hybrid Electric Vehicle
A hybrid vehicle and brake recovery technology, applied in electric vehicles, electric braking systems, vehicle components, etc., can solve the problems of low precision and large errors, and achieve the effect of improving accuracy and reliability
Inactive Publication Date: 2020-07-28
JILIN UNIV
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[0004] The invention provides a calculation method for braking energy recovery of a planetary hybrid electric vehicle, which solves the problems of large errors and low precision in the existing calculation method for braking energy recovery of a planetary type hybrid electric vehicle, and can improve vehicle manufacturing efficiency. Accuracy and Reliability of Kinetic Energy Recovery Power Calculation
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[0040] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, in which the same or similar symbols represent the same or similar physical quantities or physical quantities with the same or similar meanings 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.
[0041] In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "array" and "range" should be understood in a broad sense, for example, it can be a group of equally spaced numbers, or it can be randomly spaced For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific situations.
[0042]Since the basic structure of the planetary hybrid electric vehicle is well known to those skilled in the art, i...
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The invention discloses a calculation method for braking recovery energy of a planetary parallel-serial hybrid electric vehicle. The method comprises the following steps: firstly, based on a brake pedal opening degree gamma, a rotation speed nMG2 of a motor MG2, an automobile speed v and a battery SOC value of the planetary parallel-serial hybrid electric vehicle, judging an energy recovery mode of the current vehicle; secondly, calculating initial values of braking energy recovery power of the vehicle in N and D gears respectively according to the mode of the vehicle; and then in view of theinfluences of engine braking when the vehicle is braked with gears and the temperature change of the motor MG2 on vehicle braking recovery power, setting a reasonable offset and a temperature correction factor to obtain an actual value of the braking energy recovery power of the vehicle in the N and D gears. The method solves the problem of relatively large error and low precision in an existing calculation method, and can improve the accuracy and reliability of the calculation of the braking energy recovery power of the vehicle.
Description
technical field [0001] The invention belongs to the technical field of new energy vehicles, and in particular relates to a calculation method for braking energy recovery of a planetary hybrid vehicle. Background technique [0002] At present, under the background of increasing pressure on energy and the environment, the development of low-carbon and environmentally friendly new energy vehicles has become the focus of social attention. Among them, planetary hybrid vehicles have become a new trend due to their good fuel economy and low emissions. One of the popular directions of energy vehicles. In order to make up for the lack of endurance of the power battery of planetary hybrid vehicles, regenerative braking is used to recover braking energy, which is of great significance to improve the driving range of vehicles. Therefore, for planetary hybrid vehicles, how to realize the accurate calculation of vehicle braking energy recovery is an urgent problem to be solved. [0003]...
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IPC IPC(8): B60L7/10
Inventor 曾小华牛超凡宋大凤王星琦张轩铭钱琦峰纪人桓孙可华高福旺李晓建
Owner JILIN UNIV