An adaptive multi-mode energy recovery method and system based on road condition recognition
An energy recovery and self-adaptive technology, which is applied in the direction of electric braking system, transportation and packaging, circuit or fluid pipeline, etc., can solve the problems of vehicle comfort impact, vehicle dynamic deceleration difference, and inability to adjust, etc., to improve Energy Recovery Efficiency and Retrofit Cost Reduction Effects
Active Publication Date: 2022-03-25
DONGFENG MOTOR GRP
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Problems solved by technology
First of all, in the daily braking process, the brake pedal feel is very different from that of traditional braking when the braking energy recovery is coordinated with the two modes of regenerative braking and mechanical hydraulic braking. The braking conditions can be adjusted in real time to assist characteristics; while the traditional mechanical braking system is designed with a vacuum mechanical booster as a booster amplifier, once its structural parameters are fixed, it cannot be adjusted later; therefore, the adjustment of the brake pedal feel is greatly affected. Big limitations
Secondly, the existing braking energy recovery determines the recovery target torque, using the vehicle speed and brake pedal signal as the input conditions for the calculation of the recovery torque; this technical solution does not consider real-time vehicle parameters and road conditions changes, when the vehicle When the parameters and road conditions change, the dynamic deceleration feeling of the vehicle will be very different, which will have a great impact on the comfort of the vehicle; thirdly, due to the different road surfaces, the energy recovery strategy still cannot adapt to the change of the road surface type. , the recovery efficiency will decrease
In addition, it is not possible to recycle multi-mode design
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[0062] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0063] see figure 1 , the present invention adjusts the brake assist curve according to different recovery modes, so as to adapt to different energy recovery models.
[0064] The road surface type identification algorithm adopted by the embodiments of the present invention can adapt to different road surface types, and adopt different energy recovery strategies according to different road surface types, so as to obtain better recovery efficiency and comfortable braking feeling. For example, when the vehicle is in a coasting state: if the target torque of regenerative braking needs to be increased on ice, the normal regenerative strength should be maintained on high-speed roads. By sliding recovery, the braking feeling of the vehicle on low-adhesion roads is close to that on high-adhesion roads, and the recovery efficiency on low-adhe...
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The present invention provides an adaptive multi-mode energy recovery method and system based on road condition recognition, aimed at vehicles with electric drive systems, including hybrid and pure electric vehicles, through electronic boosters, on the basis of braking systems, based on Active road surface type recognition realizes multi-mode energy recovery function, improves energy recovery efficiency, and takes into account the comfort of vehicle braking. The invention can intelligently adapt to multi-mode energy recovery in different road states. The present invention is entirely based on the equipment of the current vehicle itself without adding any additional equipment, which reduces the transformation cost for new functions.
Description
technical field [0001] The invention belongs to the technical field of electric vehicle driving, and in particular relates to an adaptive multi-mode energy recovery method and system based on road condition recognition. Background technique [0002] In recent years, due to emission regulations and energy policies, the electrification of vehicles has become an unstoppable trend in the future, and the sales of electric vehicles have been booming in recent years. For electric vehicles, cruising range is the most important design indicator. In order to increase the cruising range, on the one hand, the capacity of the battery is continuously increased, and on the other hand, the effective utilization of electric energy is improved. Under different driving conditions of the vehicle, about 35%-80% of the kinetic energy of the vehicle is converted into heat energy and dissipated by braking; therefore, in order to further improve the cruising range of electric vehicles, braking ener...
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IPC IPC(8): B60L7/10B60R16/023
CPCB60L7/10B60R16/0231
Inventor 孙国正李泽彬文翊
Owner DONGFENG MOTOR GRP