Pure electric vehicle hill-start assist control method

A technology of pure electric vehicles and ramp assistance, which is applied in the direction of electric vehicles, control drives, control devices, etc., can solve problems that cannot be detected and prevented in a timely and effective manner, large starting frustration, long-term motor stalling, etc., and achieve smoothness Performance and safety, shortening the time of standing on the slope, and ensuring the effect of quickness

Active Publication Date: 2017-10-24
清华大学苏州汽车研究院(吴江)
View PDF6 Cites 49 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are some methods for judging the situation of slipping forward in the prior art, they cannot be detected and prevented in time and effectively.
When the motor is in the parking state, if the accelerator pedal has not been pressed, the motor may be locked for a long time. When the accelerator pedal is pressed to start,

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Pure electric vehicle hill-start assist control method
  • Pure electric vehicle hill-start assist control method
  • Pure electric vehicle hill-start assist control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0025] The preferred embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0026] Such as figure 1 As shown, the vehicle control system of this solution includes a vehicle controller 10 for processing and controlling the data of the entire vehicle, and the hill start assist control method of the present invention is integrated in the vehicle control device 10. The present invention mainly describes the slope auxiliary starting control method of the vehicle controller. The vehicle controller is connected with an accelerator pedal 1, a brake pedal 2, a hand brake 3, a gear position 4, a slope sensor 5, a vehicle weight sensor 6, and a vehicle speed signal. 7. The motor speed signal 8. The motor 9 is provided by the motor controller 12, wherein 1-8 provide the signals required by the hill start assist system 11. The method for controlling start assist on a hill will be described in detail below.

[0027] Such as ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a pure electric vehicle hill-start assist control method. When in an uphill assist mode, whether a motor rotates reversely or not is detected, a vehicle slips reversely if the motor rotates reversely, needed additional anti-slip torque of the motor is calculated according to the reverse rotation speed and the accelerated speed of the motor, and the torque of the motor is increased until the motor no longer rotates reversely. When in a flat road assist mode, slip judgment is not performed. When in a downhill assist mode, the highest stable speed of downhill start is set according to a ramp angle, driving force generated by a ramp is calculated according to a vehicle weight sensor, needed parking torque is calculated, and a brake pedal opening value K corresponding to the parking torque is calculated. When the opening of a brake pedal is smaller than K, the start process is divided into a non-accelerator start mode and an accelerator start mode by judging acceleration pedal signals, and different start assist control is performed. Based on multi-sensor information fusion technology, the pure electric vehicle can stably, rapidly and safely start on the ramp by the aid of reasonable pure electric vehicle hill-start assist control strategies.

Description

technical field [0001] The invention relates to a control method for assisting start of a vehicle on a slope, in particular to a control method for assisting a start of a pure electric vehicle on a slope. Background technique [0002] The hill start assist control function is a control function developed to simplify the hill start operation. After the driver releases the brake pedal with his right foot, this function allows the vehicle to continue for a short time without using the handbrake. Keeping the braking state leaves time for the driver to switch from the brake pedal to the accelerator pedal, so that the driver can operate the pedal calmly and start the car easily. [0003] There are generally two types of electric vehicles in existence: a hybrid electric vehicle with a pure electric drive function and a pure electric vehicle. The pure electric vehicle cancels the engine and even the gearbox of the traditional car, uses the battery as the energy source, and the moto...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B60L15/20
CPCB60L15/20B60L15/2081B60L2240/12B60L2240/14B60L2240/26B60L2240/421B60L2240/423B60L2240/642B60L2250/26Y02T10/72
Inventor 王月宏王明亮何咨毅马兴远朱江
Owner 清华大学苏州汽车研究院(吴江)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap