Distributed three-motor driving force distribution strategy for improving vehicle control stability
A technology of handling stability and distribution strategy, applied in the direction of motor, control drive, vehicle components, etc., can solve the problem of no driving force distribution strategy, and achieve the effect of ensuring steady-state steering characteristics, improving handling stability, and avoiding tire wear.
Inactive Publication Date: 2021-01-05
DONGFENG MOTOR CORP HUBEI
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Problems solved by technology
[0007] It includes centralized drive for the front wheels and distributed drive for the rear wheels, but the wheel motor is essentially different from the hub motor of the present invention, and there is no specific driving force distribution strategy
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[0057] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0058] refer to Figure 1 ~ Figure 2 As shown, the distributed three-motor driving force distribution strategy for improving vehicle handling stability in an embodiment provided by the present invention, the distributed three-motor drive system includes a power battery system, a vehicle controller, a front axle drive system and The rear axle drive system, the vehicle controller and the power battery system are respectively connected to the front axle drive system and the rear axle drive system through the CAN bus, and the power battery provides power to the front and rear motors to drive the motors;
[0059] The front axle drive system is driven by a centralized motor, including an AC motor, a reducer and a front wheel half shaft. The power battery system and the vehicle controller are connected to the AC motor, and the AC motor is connected to the tw...
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The invention discloses a distributed three-motor driving force distribution strategy for improving vehicle control stability. The strategy comprises the steps that a total target torque expected by adriver is acquired according to accelerator pedal input of the driver; front and rear axle driving torque distribution is carried out on the total target torque by adopting a distribution mode in direct proportion to axle load; the steering wheel rotating angle and the rear axle driving total torque serve as input, the difference between the ideal yaw velocity and the actual automobile yaw velocity serves as a controlled variable, and the actual controlled variable deviation is obtained through a controller; the controller decides and controls yawing moment, and the yawing moment is controlled to realize driving force distribution of hub motors on the left and right sides of a rear axle through a differential torque distribution module; and the torque is finally distributed to two hub motors of the rear axle after passing through a torque limiting module. According to the invention, the turning radius is slightly influenced by longitudinal acceleration, and the maneuverability is better; even under the limit working condition, certain lateral stability can be considered, and the steady-state steering characteristic of the automobile is guaranteed.
Description
technical field [0001] The invention relates to the technical field of electric vehicle driving, in particular to a distributed three-motor driving force distribution strategy for improving vehicle handling stability. Background technique [0002] Hub motor drive is to install the drive motor directly in the drive wheel. It is a new type of drive layout for automobiles to solve power and power efficiency. It has outstanding advantages such as short drive transmission chain, high transmission efficiency, compact structure, and fast response. It is the future An important direction for the development of electric vehicles. In-wheel motor drives the driving actuator of the vehicle—the in-wheel motor is in its own independent wheel, which greatly improves the degree of freedom and accuracy of control. The four-wheel drive model based on the hub motor has high and low voltage wire harnesses and cooling pipes of the motor at the wheel end. When they are arranged on the front whee...
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Patent Timeline
Login to View More IPC IPC(8): B60W30/02B60W50/00B60L15/32
CPCB60L15/32B60L2240/423B60W30/02B60W50/00B60W2050/0019Y02T10/64
Inventor 王念史建鹏赵春来秦博张泽阳
Owner DONGFENG MOTOR CORP HUBEI