Supercharge Your Innovation With Domain-Expert AI Agents!

Method of optimizing shift schedule of stepped automatic transmission of electric vehicle

A technology of automatic transmission and electric vehicles, which is applied in the direction of control devices, etc., to achieve the optimal effect of vehicle power and economic comprehensive performance indicators

Inactive Publication Date: 2017-06-13
XIHUA UNIV
View PDF4 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned shift schedule based on experience and a shift schedule based on a single constraint condition, and to provide a multi-performance index comprehensive optimal shift schedule optimization method for a stepped automatic transmission of an electric vehicle, which aims to reflect On the basis of the driver's intention to shift gears, ensure that the comprehensive performance indicators of the vehicle's power and economy are optimal

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
  • Method of optimizing shift schedule of stepped automatic transmission of electric vehicle
  • Method of optimizing shift schedule of stepped automatic transmission of electric vehicle
  • Method of optimizing shift schedule of stepped automatic transmission of electric vehicle

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0097] Example 1: Set the weight of each sub-objective function to w d = 70%, w j =30%, to express that the driver hopes to drive the car in a mode that focuses on power and takes economical into consideration. Using the above method to optimize and calculate the optimal shift schedule of multi-performance with superior dynamic performance is as follows: Figure 5 shown.

[0098] Example 2: Set the weight of each sub-objective function to w d = 30%, w j =70%, to express that the driver hopes to drive the car in a mode that is more economical in energy consumption and at the same time takes power into account. The economically superior multi-performance comprehensive optimal shift schedule obtained by the optimization calculation of the above method is as follows: Image 6 shown.

[0099] Example 3: Set the weight of each sub-objective function to w d = 50%, w j =50%, to express that the driver has the same expectations for power and economy. The optimal shift law of p...

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

A method of optimizing shift schedule of a stepped automatic transmission of an electric vehicle comprises: constructing an integrated evaluation function for electric vehicle multi-performance integrated optimal shift schedule; with the integrated evaluation function as an optimization target, and basic conditions of vehicle driving and speed range corresponding to a motor high-efficiency area as constraints, using optimization algorithm to calculate multi-performance integrated optimal shift schedule for the electric vehicle stepped automatic transmission; by using the shift schedule for the electric vehicle stepped automatic transmission formulated by the method, it is possible to ensure optimal vehicle power and optimal ecological integrated performance indexes at the premise of allowing the vehicle to reflect a driver's shifting intention.

Description

technical field [0001] The invention relates to a method for optimizing the shift schedule of a stepped automatic transmission of an electric vehicle, and belongs to the technical field of the stepped automatic transmission of an electric vehicle. Background technique [0002] Shift schedule plays a very important role in vehicles equipped with automatic transmission, and it is one of the core technical links of automatic transmission system. At present, electric vehicles mostly use traditional automatic transmissions, so they have the same effect as the shift schedule of internal combustion engine vehicles, and both are the basis for gear decision-making. Considering its impact on motor efficiency, power and economy, the shift schedule is also There are certain differences. [0003] According to different control parameters, shift schedules are mainly divided into single-parameter (vehicle speed), two-parameter (vehicle speed, accelerator pedal intensity) and three-paramet...

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): B60W40/00B60W40/105B60W50/00
CPCB60W40/00B60W40/105B60W50/00B60W2050/0042B60W2520/10
Inventor 阴晓峰武小花孙华孙超王贵均
Owner XIHUA UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com