Integrated ramp start-stop control method for centralized motor-driven vehicle
A motor-driven, start-stop control technology, which is applied to control devices, vehicle components, input parameters of external conditions, etc., can solve the problem of difficulty in controlling the speed of vehicles on steep slopes when starting from a slope, and reduces the difficulty of development and algorithm complexity. The effect of strong reliability and simple principle
Pending Publication Date: 2021-12-21
JILIN UNIV
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Problems solved by technology
[0006] The purpose of the present invention is to realize the function integration of mutually independent ramp auxiliary subsystems based on the self-defined starting risk assessment results, and solve the difficulty in controlling the speed of the centralized motor-driven vehicle due to the excessive weight of the ramp at the start of the ramp and down the steep slope. and other problems, and provides an integrated ramp start-stop control method for centralized motor-driven vehicles
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[0063] see Figure 1 to Figure 3 shown:
[0064] The integrated ramp start-stop control method for a centralized motor-driven vehicle provided by the present invention includes the following steps:
[0065] Step 1. Design an uphill start assist control system based on electric vehicle creep compensation. The uphill start assist control system is replaced by the hill start assist system as described below. The hill start assist system includes a hill start strategy response module and a hill start creep compensation control. two parts;
[0066] The hill-start strategy response module is responsible for monitoring the vehicle status, identifying the driver's intention, and outputting the hill-start assist intervention flag. The hill-start assist intervention flag is initially set to 0, and the function is in an inactive state. The designed activation conditions are as follows:
[0067] Condition 1. When at least 2 of the 4 wheel speeds are lower than the designed threshold for...
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The invention discloses an integrated ramp start-stop control method for a centralized motor-driven vehicle. The method comprises the steps of 1, designing an uphill start auxiliary control system based on electric vehicle crawling compensation; 2, designing a full-scene automatic parking control system based on driver operation, wherein the full-scene automatic parking control system is replaced by an automatic parking system according to the following description, and the automatic parking system comprises a parking strategy response module and a hydraulic braking keeping module; and 3, designing a function integration interaction module based on start risk assessment. The method has the beneficial effects that the designed uphill start crawling compensation control strategy can take over brake master cylinder pressure control during slope starting, and smooth starting of the vehicle is cooperatively guaranteed through brake pressure reduction control based on the driving torque change rate and electric vehicle crawling compensation control based on feedback. The method is simple in principle, does not need to additionally design a control algorithm, and is high in reliability. The starting safety in a full-road scene is realized.
Description
technical field [0001] The invention relates to an integrated ramp start-stop control method for a vehicle, in particular to an integrated ramp start-stop control method for a centralized motor-driven vehicle. Background technique [0002] At present, centralized motor-driven vehicles, as an important category of new energy vehicles, have obvious advantages in saving energy and reducing carbon dioxide emissions. In recent years, they have developed rapidly. The high-performance electronic and electrical platforms they carry have greatly reduced the difficulty of developing driver assistance functions. [0003] The uphill start assist function and the automatic parking function are important guarantees for the safety of the centralized motor-driven vehicle on the slope. For the former, the Chinese Patent Publication No. CN108819787A, published on 2018-11-16, designed a starting anti-slope method for unlocking the electronic parking when the driver's required wheel-end torque ...
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IPC IPC(8): B60W30/18B60W10/08B60W10/18
CPCB60W30/18009B60W30/18027B60W30/18063B60W10/08B60W10/18B60W2510/1005B60W2552/15B60W2520/28B60W2710/182B60W2710/083B60W2720/10Y02T10/72
Inventor 赵健杜金朋朱冰
Owner JILIN UNIV