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New energy automobile sliding control system and method based on intelligent network connection information and new energy automobile

A new energy vehicle and control system technology, applied in the field of new energy vehicle coasting control system, can solve the problems such as difficulty in showing the advantages of coasting recovery function, loss of recoverable energy, and inseparability.

Pending Publication Date: 2021-04-16
UNITED AUTOMOTIVE ELECTRONICS SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] however, the benefits of taxi recovery are difficult to capture in current strategies
On the one hand, in the actual driving process, the driver often cannot decide when to release the accelerator pedal to smoothly slide to the front deceleration area, resulting in unnecessary loss of driving and braking energy conversion; on the other hand, the strategy does not Considering the method of maximizing coasting energy recovery, it causes the loss of part of the recoverable energy; to improve the above two problems, the vehicle control needs to be forward-looking and predictable, that is, it is necessary to know the deceleration demand ahead and make a decision in advance. This is inseparable from the input of intelligent network information

Method used

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  • New energy automobile sliding control system and method based on intelligent network connection information and new energy automobile
  • New energy automobile sliding control system and method based on intelligent network connection information and new energy automobile
  • New energy automobile sliding control system and method based on intelligent network connection information and new energy automobile

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Such as figure 2 As shown, the new energy vehicle taxiing control system based on the information of the intelligent network connection includes the intelligent network connection system, the driver taxiing reminder module, and the vehicle speed trajectory planning and following module;

[0063] The intelligent network connection system is used to analyze the intelligent network connection information collected by the environmental perception system to obtain the taxiing control parameters; the taxiing control parameters include the distance s from the vehicle to the front deceleration area f , The target vehicle speed ahead (the maximum speed limit in the deceleration area) V f ;

[0064] Driver taxiing module, when the vehicle reaches the front deceleration area distance s f less than the vehicle at the current speed V 0 Pure taxiing to the target vehicle speed V ahead f The sliding distance s 0 , then output the coasting activation signal to the vehicle speed t...

Embodiment 2

[0070] Based on the new energy vehicle taxiing control system of Embodiment 1, the taxiing control parameters also include a slope angle β;

[0071] v=V 0 +αT;

[0072] In the formula, V 0 is the current vehicle speed, C D is the wind resistance coefficient, ρ is the air density, A is the windward area, m is the vehicle mass, μ is the rolling resistance coefficient, g is the acceleration of gravity, α is the vehicle acceleration, and v is the predicted speed of the taxiing process, which is calculated by the longitudinal dynamics formula The vehicle acceleration a and current vehicle speed V 0 Calculated iteratively, T represents a discrete time interval.

[0073] For the new energy vehicle sliding control system, the parameters of the vehicle model are estimated as follows:

[0074] The force of the vehicle during driving is divided into three directions—longitudinal, vertical and lateral. Correspondingly, the content of vehicle dynamics mainly includes driving and b...

Embodiment 3

[0086] Based on the new energy vehicle taxiing control system of Embodiment 2, the driver taxiing module, when the vehicle reaches the front deceleration area distance s f less than the vehicle at the current speed V 0 Pure taxiing to the target vehicle speed V ahead f The sliding distance s 0 , and greater than the minimum deceleration distance s 1 , 01 0 , then output a coasting activation signal to the vehicle speed trajectory planning and following module, and output a prompt message for the driver to release the pedal.

[0087] Preferably, the driver's coasting module recovers the maximum torque T according to the motor min and the maximum acceptable deceleration α for driving experience max Calculate the deceleration minimum distance s 1 .

[0088] In the new energy vehicle coasting control system of Embodiment 3, considering the limitation of motor recovery torque and the difference in driving experience, when the distance between the vehicle and the target decele...

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Abstract

The invention discloses a new energy automobile sliding control system based on intelligent network connection information, which automatically outputs driver pedal loosening prompt information according to front deceleration scene information through the assistance of an intelligent network connection function, notifies a driver in advance that a pedal can be loosened at proper time for sliding, and after the driver loosens the pedal and enters sliding, an optimal economical vehicle speed curve following the sliding working condition is automatically planned, so that the vehicle travels to a deceleration area in a most energy-saving sliding mode, energy consumption conversion loss caused by the fact that a driver steps on an accelerator in the front section to drive a brake in the rear section is avoided, kinetic energy is recycled as much as possible while the sliding distance is met and drivability is guaranteed, and the endurance mileage of the whole vehicle is increased. On the premise of ensuring drivability and safety, the energy-saving potential of a sliding deceleration scene is embodied to the maximum extent, the energy-saving and emission-reducing effects of the vehicle are effectively improved, and the driver is liberated from paying attention to anxiety during deceleration. The invention further discloses a new energy automobile sliding control method based on the intelligent network connection information and a new energy automobile.

Description

technical field [0001] The invention relates to new energy vehicle technology, in particular to a new energy vehicle coasting control system and method based on intelligent network information and a new energy vehicle. Background technique [0002] In recent years, new energy vehicles have gradually become the mainstream of the automobile market due to their good energy-saving and emission-reduction performance and the active guidance of national policies. The reason why it can effectively reduce energy consumption, on the one hand, is to improve energy conversion efficiency through a reasonable energy distribution strategy, and another very important aspect is to stop and coast as much as possible during deceleration motion, and recover braking energy through the motor when necessary way to charge the battery to reduce energy consumption. The former has already been analyzed from various perspectives in many literatures, so I won’t go into details here, but focus on the la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W30/18
CPCY02T10/60B60W30/18072
Inventor 鄢挺程玉佼
Owner UNITED AUTOMOTIVE ELECTRONICS SYST
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