Virtual P-gear slope parking and slope sliding prevention control method for new energy automobile

A technology of new energy vehicles and control methods, applied in the field of new energy vehicle virtual P parking slope and anti-slope control, can solve the problems of reliability, safety assembly, poor comfort, parking reliability, poor safety, and reduced Vehicle comfort and other issues to achieve the effect of improving vehicle safety, reducing assembly accuracy, and reducing noise

Pending Publication Date: 2022-03-22
DONGFENG AUTOMOBILE COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this scheme, it is necessary to rely on the P gear parking mechanism, the P gear controller, and the related CAN network and wiring harness to work together to ensure the smooth parking of the vehicle. Not only are there more control nodes, but the parking reliability and safety are poor. Moreover, the cost is high, the assembly is complicated, and the requirements for the processing technology of the P block parking mechanism are also stricter. If the driver does not operate properly, the transmission gear is easily damaged, and the maintenance cost is high. When the vehicle is parked, especially when it is parked on a slope, it will slide back 5-10cm, accompanied by obvious mechanical noise and shaking, which reduces the comfort of the vehicle
Therefore, the existing mechanical P gear parking mechanism has the problems of poor reliability, safety, assembly and comfort.

Method used

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  • Virtual P-gear slope parking and slope sliding prevention control method for new energy automobile
  • Virtual P-gear slope parking and slope sliding prevention control method for new energy automobile
  • Virtual P-gear slope parking and slope sliding prevention control method for new energy automobile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] see figure 1 , figure 2 , a virtual P gear parking slope and anti-slope control method for a new energy vehicle, including slope parking control, and the slope parking control is specifically carried out according to the following steps:

[0044] A1. The vehicle controller VCU judges whether the received current gear signal is a P gear signal. If so, control the motor controller MCU to enter the virtual P gear mode, and then enter step A2. If not, press the current gear signal to continue driving;

[0045] A2, the motor controller MCU judges whether a hand brake or a brake signal is received, if so, park the vehicle through the hand brake or the brake, if not, realize parking through the virtual P mode of the motor controller MCU;

[0046] Wherein, the realization of parking through the virtual P gear mode of the motor controller MCU is specifically:

[0047] The motor controller MCU first enters the speed control mode and controls the motor torque to be cleared, an...

Embodiment 2

[0051] The difference with embodiment 1 is:

[0052] see image 3 , Figure 4 , the method also includes anti-slope control, the anti-slope control is located after the standing slope control, and the anti-slope control is specifically: the motor controller MCU detects that the current gear signal is a D gear or R gear signal And if the handbrake, brake or accelerator signal is not detected, judge whether the motor has a speed and whether the direction of the motor speed is opposite to the current gear signal. If there is a speed and the direction of the speed is opposite to the current gear signal, enter the anti-slope mode , if not, enter the creeping driving mode;

[0053] The anti-slope mode is specifically: the motor controller MCU first opens the anti-slope function, and then closes the anti-slope function after T seconds, and exits the anti-slope mode after the above steps circulate N times, wherein, N=3, The anti-slope function is that the motor controller MCU appli...

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Abstract

A virtual P-gear hill-holding and slope-sliding prevention control method for a new energy automobile comprises the steps that hill-holding control is conducted, specifically, firstly, when a VCU receives a P-gear signal, a motor controller MCU is controlled to enter a virtual P-gear mode, and then parking is achieved through the virtual P-gear mode when the motor controller MCU does not receive a hand brake or brake signal; and finally, the motor controller MCU starts an electronic brake EPB after the parking duration reaches the set duration, and after the electronic brake EPB is started, the motor controller MCU does not park in the virtual P-gear mode any more. According to the design, a mechanical P-gear parking mechanism, a P-gear parking mechanism controller, a related CAN network, a wire harness and other parts are omitted, parking is conducted in a virtual P-gear mode, the vehicle cost can be reduced, the assembling precision can be improved, damage to a gearbox gear caused by misoperation of a driver is avoided, and in the parking process, noise is lower, the shaking amplitude is lower, the riding comfort is high, and the vehicle safety is high.

Description

technical field [0001] The invention belongs to the technical field of new energy vehicle control, and in particular relates to a new energy vehicle virtual P gear parking slope and anti-slope control method, which is suitable for improving the reliability, safety, assembly and comfort of parking. Background technique [0002] At present, new energy vehicles often rely on mechanical P gears and hand brakes to park on slopes. When the driver parks and mounts the P gear, the pawl is pushed into the slot of the parking gear through the pressing device or the P gear motor, and the parking gear transmits force to the half shaft through the slot and the pawl to stop the vehicle on the road. In this scheme, it is necessary to rely on the P gear parking mechanism, the P gear controller, and the related CAN network and wiring harness to work together to ensure the smooth parking of the vehicle. Not only are there more control nodes, but the parking reliability and safety are poor. M...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L15/20
CPCB60L15/2018B60L2240/423B60L2260/44Y02T10/72
Inventor 曾明扬郭启翔唐剑波林凌王磊马银波尤泰康黎新李帅李大威李嫩郑杭
Owner DONGFENG AUTOMOBILE COMPANY
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