A hill-climbing shift strategy for a two-speed automatic transmission vehicle

A technology of automatic transmission and gear shifting strategy, which is applied in the direction of components with teeth, transmission control, belt/chain/gear, etc., which can solve the problems of vehicle climbing performance, inapplicability, complexity, etc., to avoid Frequent gear shifting, optimized gear selection, and simple switching strategies

Active Publication Date: 2021-03-19
XIAMEN KING LONG UNITED AUTOMOTIVE IND CO LTD
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention provides a climbing and shifting strategy for a two-speed automatic transmission vehicle to solve the problem that the existing climbing strategy has a certain influence on the climbing performance of the vehicle and is relatively complicated, and is not suitable for a two-speed automatic transmission at the same time. Disadvantages such as electric vehicles

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
  • A hill-climbing shift strategy for a two-speed automatic transmission vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] Specific embodiments of the present invention will be described below with reference to the accompanying drawings. In order to provide a comprehensive understanding of the present invention, many details are described below, but it will be apparent to those skilled in the art that the present invention can be practiced without these details. Known components, methods and processes will not be described in detail below.

[0022] A hill-climbing shift strategy for a two-speed automatic transmission vehicle, refer to figure 1 , specifically follow the steps below:

[0023] Step 1: During the driving process of the vehicle, combined with the real-time speed, torque and slope sensor data of the driving motor, within a certain calculation period t, use the vehicle dynamics model to calculate the mass of the vehicle in the current state (as shown in Equation 1 Show).

[0024] , in formula (1): n is the output speed of the motor, r / min; T is the output torque of the motor,...

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 climbing gear shifting strategy of a two-gear automatic transmission vehicle. The climbing gear shifting strategy of the two-gear automatic transmission vehicle comprises thefollowing steps that in the running process of the vehicle, in combination with the real-time rotating speed and torque of a driving motor and data of a ramp sensor, the mass of the vehicle in the current state is obtained through calculation by means of a vehicle dynamics model; the maximum vehicle speed Vmax which can be reached by each gear of the vehicle in the current state according to rampinformation and the mass of the current vehicle calculated in step 1 in combination with a driving Map theory of the vehicle driving motor; and a vehicle gear shifting strategy in the climbing process is selected according to the maximum vehicle speed Vmax calculated in step 2 and reference on the optimal gear shifting vehicle speed point of the vehicle. According to the climbing gear shifting strategy of the two-gear automatic transmission vehicle, the gear shifting strategy is simpler, gear selection is optimized, frequent gear shifting on a ramp is avoided, and driving comfort is improved.

Description

technical field [0001] The present invention relates to a gear shifting strategy of an electric vehicle, more specifically a climbing gear shifting strategy of a two-speed automatic transmission vehicle. Background technique [0002] With the rapid development of new energy vehicles, people have higher requirements for the comfort and reliability of the vehicle, and the shift speed point of the electric vehicle matched with the automatic transmission is usually based on the external characteristics of the drive motor and the speed ratio of each gear. Optimal calculation to obtain the optimal shifting speed, reducing the frustration during the shifting process. However, when the vehicle is driving on a slope, the speed of the vehicle will often change due to changes in the slope and load, which will cause the vehicle to shift gears frequently, which will affect the ride comfort of the passengers, and will affect the operation of the automatic transmission in the long run. Th...

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
Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/02
CPCF16H61/0213F16H2061/0234
Inventor 龚刚林陈立林思学
Owner XIAMEN KING LONG UNITED AUTOMOTIVE IND CO LTD
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