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Method and device for determining vehicle speed and vehicle

A technology for determining method and device, which is applied in the field of vehicle speed determination method, device and automobile, can solve problems such as inconsistency, vehicle out of control, lack of safety check and fault handling process, etc., so as to improve safety and reliability, and improve driving Feel the effect

Active Publication Date: 2020-03-06
BEIJING ELECTRIC VEHICLE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the vehicle speed is determined by collecting the rotational speed of each wheel and the rotation radius of the wheels by the wheel speed sensors on the four wheels to determine the driving speed of the vehicle. At present, there is no specific safety check and fault handling process, so When the wheel speed sensor fails, the calculated vehicle speed does not match the actual vehicle speed, causing the car to lose control, threatening the safety of people and vehicles

Method used

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  • Method and device for determining vehicle speed and vehicle
  • Method and device for determining vehicle speed and vehicle
  • Method and device for determining vehicle speed and vehicle

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Embodiment Construction

[0069] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0070] The embodiment of the present invention aims at the problem in the prior art that the vehicle speed calculation result is wrong due to abnormal parts or abnormal road conditions, resulting in traffic accidents, and provides a vehicle speed determination method, device and automobile, which realizes the vehicle speed calculated by the motor speed and The vehicle speed calculated by the wheel speed is checked for safety, which improves the safety and reliability of the car, and also improves the driving experience of the user.

[0071] Such as figure 1 As shown, an embodiment of the present invention provides a method for determining vehicle speed, including:

[0072] Step 11, acquiring the motor speed and multiple wheel speeds of the vehicle in re...

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Abstract

The invention provides an automobile speed determining method and device, and an automobile, and relates to the technical field of automobile control. The automobile speed determining method comprisesthe steps that the rotational speed of a motor of the automobile and the rotational speeds of a plurality of wheels are obtained in real time; if the current obtained rotational speeds of the multiple wheels are all within a first preset range, the first theoretical automobile speed is calculated according to the rotational speeds of the multiple wheels; if the current obtained rotational speed of the motor is within a second preset range, the second theoretical automobile speed is calculated according to the rotational speed of the motor; and the current output automobile speed of the automobile is determined according to the first theoretical automobile speed and the second theoretical automobile speed. According to the automobile speed determining method and device, and the automobile,the calculated theoretical automobile speeds are subjected to security checking, the possibility of accident occurring caused by automobile speed miscalculation due to unit exception is decreased, and the safety and reliability of the automobile are improved.

Description

technical field [0001] The invention belongs to the technical field of vehicle control, and in particular relates to a vehicle speed determination method, device and vehicle. Background technique [0002] With the development of economy and technology, cars are becoming more and more popular, and cars have become an indispensable travel tool for people. With the increase in the number of cars, there are more and more traffic accidents on the road. It also happens from time to time. Therefore, users have higher and higher requirements for the safety and reliability of cars. [0003] In the prior art, the vehicle speed is determined by collecting the rotational speed of each wheel and the rotation radius of the wheels by the wheel speed sensors on the four wheels to determine the driving speed of the vehicle. At present, there is no specific safety check and fault handling process, so When the wheel speed sensor fails, the calculated vehicle speed does not match the actual ve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W40/105
CPCB60W40/105B60W2510/081B60W2520/28
Inventor 刘明丁张蓝文代康伟李明亮
Owner BEIJING ELECTRIC VEHICLE
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