Steering gear rack tail end protection control method and device, terminal and storage medium

A technology of end protection and control method, which is applied in the field of automobiles, and can solve problems such as noise, hand feeling, and reduction of steering power at the end of the rack.

Pending Publication Date: 2022-08-05
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, by reducing the steering power at the end of the rack, the driver will have a certain resistance when the steering wheel reaches the end, avoiding the problems of noise and poor hand feeling caused by mechanical impact at the end of the steering gear

Method used

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  • Steering gear rack tail end protection control method and device, terminal and storage medium
  • Steering gear rack tail end protection control method and device, terminal and storage medium
  • Steering gear rack tail end protection control method and device, terminal and storage medium

Examples

Experimental program
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Effect test

Embodiment 1

[0055] figure 1 This is a flowchart of a method for controlling the end protection of a steering gear rack provided in Embodiment 1 of the present invention. This embodiment can be applied to the control of the protection of the rack end of an electric steering gear. A steering gear rack end protection control device is implemented, and the device can be implemented by software and / or hardware.

[0056] see figure 1 , a control method for the protection of the end of a steering gear rack, comprising the following steps:

[0057] Step 1. Obtain the pre-calibrated steering wheel zero position of the vehicle, and calculate the left steering wheel limit angle theoretical value SWA_LT and the right steering wheel limit angle theoretical value SWA_RT according to the steering gear rack stroke and line angle transmission ratio; (Define the left steering angle of the steering wheel is "negative", and the right turn angle is "positive"); the specific method is as follows:

[0058] T...

Embodiment 2

[0082] see Figure 4 , a steering gear rack end protection control device, including:

[0083] The first calculation module is used to calculate the left steering wheel limit angle theoretical value SWA_LT and the right steering wheel limit angle theoretical value SWA_RT according to the steering gear rack stroke and the line angle transmission ratio after obtaining the vehicle pre-calibrated steering wheel zero point position;

[0084] The second calculation module is used to calculate the angle range [θL2, θL1] of the left rack end protection function and the angle range [θR1, θR2] of the right rack end protection function after defining the rack end protection angle range AREA;

[0085] The acquisition module is used to obtain the actual rotation angle SWA_L of the left steering limit position and the actual rotation angle SWA_R of the right steering limit position through the rotation angle sensor;

[0086] The correction execution module is used for when the difference b...

Embodiment 3

[0089] Figure 5 This is a structural block diagram of a terminal provided by an embodiment of the present application, and the terminal may be the terminal in the foregoing embodiment. The terminal 300 may be a portable mobile terminal, such as a smart phone and a tablet computer. The terminal 300 may also be referred to by other names such as user equipment, portable terminal, and the like.

[0090] Generally, the terminal 300 includes: a processor 301 and a memory 302 .

[0091] The processor 301 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and the like. The processor 301 may adopt at least one hardware form of DSP (Digital Signal Processing, digital signal processing), FPGA (Field-Programmable Gate Array, field programmable gate array), PLA (Programmable Logic Array, programmable logic array) accomplish. The processor 301 may also include a main processor and a co-processor. The main processor is a processor used to process...

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Abstract

The invention relates to a steering gear rack tail end protection control method and device, a terminal and a storage medium. The method comprises the following steps: 1, calculating theoretical limit corner values of left and right steering wheels; 2, defining a rack tail end protection corner range, and calculating corner ranges of left and right side rack tail end protection functions; 3, acquiring actual turning angles of left and right turning limit positions; fourthly, when the difference value between the actual turning angle of the left steering limiting position and the actual turning angle of the right steering limiting position is larger than a threshold value, the protective turning angle at the tail end of the rack is corrected, and otherwise, execution is carried out according to a default theory calculation result; 5, judging whether rack tail end protection is started or not according to whether the signal directions of the steering torque direction and the steering angle direction are consistent or not; before the steering gear rack reaches the tail end position, electronic components of the controller are prevented from being damaged by too high temperature by reducing the current of the steering power assisting device controller, and the problems of noise and poor hand feeling caused by mechanical impact of the tail end of the steering gear are solved by reducing the steering power assisting magnitude of the tail end of the rack.

Description

technical field [0001] The invention belongs to the technical field of automobiles, in particular to a control method, a device, a terminal and a storage medium for protecting the end of a steering gear rack. Background technique [0002] At present, there are two schemes for protecting the end of the steering gear rack: [0003] The first protection scheme is to add physical components (such as rubber dampers or nylon pads) to the end of the steering gear rack to eliminate the metal crash sound generated when steering to the limit position, while the elastic compression of the rubber or nylon elements Increase the resistance on the feel when turning to the extreme position, and improve the driving quality. [0004] Another solution is to implement in the electric power steering device. Through the software strategy in its controller, the steering assist current is deliberately reduced within a certain stroke near the limit position on both sides of the steering to slow the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D5/04B62D3/12
CPCB62D5/0469B62D3/126Y02T10/72
Inventor 张吉何畅赵向青王鹏飞高尚王仕伟
Owner CHINA FIRST AUTOMOBILE
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