Control method for realizing crawling of electric vehicle on the basis of driving controller
A drive controller, electric vehicle technology, applied in electric vehicles, control drives, control devices, etc., can solve problems such as vehicle forward rush, jitter, reduce vehicle driving comfort and safety, affect vehicle smooth start, etc., to simplify the The effect of starting movements, improved comfort and safety
Active Publication Date: 2017-07-07
SHANGHAI DAJUN TECH
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Problems solved by technology
However, as the load changes, the vehicle will rush forward and shake, which will affect the smooth start of the vehicle and reduce the driving comfort and safety of the vehicle.
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[0018] Example figure 1 As shown, the present invention realizes the control method of electric vehicle peristalsis based on drive controller and comprises the following steps:
[0019] Step 1. Set the first threshold of electric vehicle motor speed, the second threshold of motor speed, the third threshold of motor speed, and the fourth threshold of motor speed. The first threshold is the maximum speed of the vehicle creeping, and the second threshold is the motor starting to accelerate. The third threshold is the starting speed for starting to find the vehicle power balance, and the fourth threshold is the highest speed for completely exiting the vehicle creep control, wherein the third threshold is smaller than the first threshold;
[0020] Step 2. The drive controller detects whether the vehicle's hand brake, foot brake, accelerator setting, gear position, and motor control system are normal, and whether the first threshold of the motor speed meets the threshold to enter th...
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The invention discloses a control method for realizing crawling of an electric vehicle on the basis of a driving controller. The control method for realizing the crawling of the electric vehicle on the basis of the driving controller comprises the steps of firstly, setting four threshold values for the rotation speed of a motor; enabling the driving controller to detect whether an integrated state of the vehicle and a first threshold value satisfy requirements on entering in a crawling mode or not; in the crawling mode, controlling the motor to smoothly increase output moment and limit the amplitude of the moment; when the rotation speed of the motor reaches a second threshold value, controlling the motor to accelerate by using the current output moment of the motor as maximum output moment; and when the rotation speed of the motor reaches a third threshold value and a given moment of a vehicle controller is not received, enabling the driving controller to automatically find a power balancing point of motor output; and in a non-crawling mode, judging whether the rotation speed of the motor reaches a fourth threshold value or not; and if the rotation speed of the motor does not reach the fourth threshold value, responding to a given instruction of the vehicle controller; and if the rotation speed of the motor reaches the fourth threshold value, comparing the current motor moment with the given moment of the vehicle controller; and if the given moment is larger than the current moment, responding to the given instruction of the vehicle controller; and otherwise, smoothly controlling the output moment of the motor. The control method for realizing the crawling of the electric vehicle on the basis of the driving controller has the advantages that the vehicle is stably started, the starting action is simplified, forward-rush and shaking of the vehicle do not exist and the driving comfort and safety are improved.
Description
technical field [0001] The invention relates to a control method for realizing electric vehicle creep based on a drive controller. Background technique [0002] Based on the ever-increasing requirements for driving comfort and safety, although it is not difficult to realize the car creep function, how to realize creep and the process of switching to normal driving under creep conditions is particularly important, especially on slopes, and even A slippery slope will occur. Once a slippery slope occurs, it will cause a greater safety hazard to vehicle safety. [0003] Chinese patent application CN104670044A discloses a control method and system for realizing low-speed creeping with the help of a motor controller, which is mainly completed in two steps: first, collecting the current vehicle state signal and sending the current vehicle state signal to the motor The controller MCU, MCU determines the current working mode by controlling the target speed of the motor according to...
Claims
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Login to View More IPC IPC(8): B60L15/20
CPCB60L15/2063B60L2240/423Y02T10/72
Inventor 严小朋王文峰杜朝晖雷小军
Owner SHANGHAI DAJUN TECH