Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Gear-shifting control method for automatic hydraulic speed changer

A technology of automatic transmission and control method, which is applied in the direction of transmission control, toothed components, belts/chains/gears, etc., which can solve the problems of shifting shock, jitter or frustration, etc., to reduce shifting shock, reduce Clutch slipping, effect of improving shift quality

Active Publication Date: 2014-03-26
SHENGRUI TRANSMISSION
View PDF4 Cites 30 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the present invention is to provide a gear shift control method for a hydraulic automatic transmission in view of the above problems, which overcomes the defects of shifting shock, vibration or frustration in the process of gear shift switching in the prior art. After the control method, the problem of shifting impact during the gear shifting process is solved, and a simple, efficient and smooth hydraulic automatic transmission shifting control is realized.

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
  • Gear-shifting control method for automatic hydraulic speed changer
  • Gear-shifting control method for automatic hydraulic speed changer
  • Gear-shifting control method for automatic hydraulic speed changer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0030] In the embodiment, a gear shift control method of a hydraulic automatic transmission, the 8-speed hydraulic automatic transmission realizes 8 forward gears and 1 reverse gear through 4 wet clutches and 1 brake. For example, in the 1st gear, the B1, C1, and C4 clutches are combined, and so on, the shift logic relationship of the hydraulic automatic transmission is shown in the following table:

[0031]

[0032] Analyze the shift logic in the above table by summarizing, such as figure 1 As shown, all sequential shifts and most interval shifts satisfy the "simple shift logic", that is, each shift requires only one shift element to be opened, and one shift element to be combined to complete the shift During the shifting process,...

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 gear-shifting control method for an automatic hydraulic speed changer. The gear-shifting control method comprises the steps that in the one-time gear shifting process, only one clutch is started, the other clutch is combined, the torque exchanging process is carried out between the two movement clutches, oil pressure is controlled through the combination of the clutch controlling step and the separated clutch controlling step, and the flexible clutch combination is guaranteed by adjusting the K1 and K2 control pressure in the gear shifting process. The engine torque changing is controlled, and easy, efficient and smooth gear shifting controlling of the automatic hydraulic speed changer is achieved. The test carried out under the full accelerator aperture and other limiting conditions such as gear lifting and gear jumping and reducing in a low-gear gear area shows that the control method can meet the requirements for gear shifting quality of forward torque gear lifting, forward torque gear reducing, negative torque gear lifting and negative toque gear reducing.

Description

technical field [0001] The invention relates to a shift control method of a hydraulic automatic transmission, which belongs to the field of shift control of automatic transmissions. Background technique [0002] With the development of the automobile industry, automatic transmission vehicles are more and more favored by consumers. Compared with manual transmission vehicles, which require frequent shifting operations, are easy to cause driver fatigue, and affect driving safety, hydraulic automatic transmission vehicles are easy to operate and have good adaptability, which greatly improves the service life of the engine and drive train. The hydraulic automatic transmission changes the transmission ratio by opening and combining the shift clutch to complete the shift control process. [0003] In the process of realizing the present invention, the inventor found that the prior art has the following deficiencies: However, due to the complex and changeable driving conditions of t...

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 Applications(China)
IPC IPC(8): F16H61/40
CPCF16H61/40F16H61/4183F16H61/46
Inventor 刘祥伍鲁曦李强史春光
Owner SHENGRUI TRANSMISSION
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com