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

Method and device for controlling automatic transmission

A technology of automatic transmission and control method, which is applied to the transmission device, gear transmission device, transmission device control, etc., can solve the problem of reduced responsiveness of frictional engagement elements, and achieve the effect of shortening the engagement control time

Inactive Publication Date: 2017-11-28
MAZDA MOTOR CORP
View PDF15 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there are problems in that the engagement control for bringing the frictional engagement elements into the engaged state takes time, and the responsiveness of the frictional engagement elements decreases.

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 and device for controlling automatic transmission
  • Method and device for controlling automatic transmission
  • Method and device for controlling automatic transmission

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0096] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the form described below is one form of the present invention, and the present invention is not limited by the following forms except for its essential structure;

[0097] [Implementation form]

[0098] [Overall structure of automatic transmission 1]

[0099] figure 1 It is a schematic diagram showing the structure of the automatic transmission 1 for automobiles (vehicles) according to the embodiment of the present invention. The automatic transmission 1 includes: a transmission case 2; an input shaft 3 arranged in the transmission case 2 and extending from the engine side; an output gear 4; and four sets of planetary gear sets (first planetary gear set 11, Second planetary gear set 12, third planetary gear set 13, fourth planetary gear set 14), two brakes (first brake 21, second brake 22), and three clutches (first clutch 31, second clutch 32, the third ...

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 relates to a method and device for controlling automatic transmission. The invention aims to reduce joint impact, shorten joint control time, and simplify the control and realize precise control of state change of automatic transmission. A speed changing command is emitted at T0, an oil pressure control part sends a first indicating pressure namely an oil pressure command of oil pressure level L5 on a linear electromagnetic valve during the first period from T0 to T5 by corresponding to the speed changing command (first process); and then, during the second period from T5 to T6, a second indicating pressure, which increases as time passes from oil level L5 to oil level L7, is applied on the linear electromagnetic valve (second process). The oil pressure level L5 is smaller than the oil pressure level L6 namely a release pressure of a reducing valve. From time T8, the set pressure level of the reducing valve is changed from level L6 to level L4. Thus, the pressure difference between a joint oil pressure chamber and a release oil pressure chamber is increased so as to increase the press force on a friction plate unit.

Description

technical field [0001] The present invention relates to a control method and a control device of an automatic transmission, in particular to a control method and a control device of an automatic transmission mounted on a vehicle. Background technique [0002] The automatic transmission mounted on vehicles such as automobiles is formed by combining a torque converter and a transmission gear mechanism, and appropriately selects the working state of multiple frictional engagement elements such as clutches and brakes, that is, the power transmission path, according to the operating conditions, so as to provide a specified The structure of the automatic transmission of the transmission section. [0003] With regard to shift control of an automatic transmission, when switching a frictional engagement element from a disengaged state to an engaged state, it is required to shorten the time from when a shift command is issued to when the engagement is completed, and to reduce the enga...

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): F16H61/40F16H3/66
CPCF16H3/66F16H61/40F16H2200/006F16H57/10F16H59/18F16H59/36F16H59/54F16H59/70F16H59/72F16H61/0206F16H61/2807F16H2003/442F16H2059/683F16D2500/3024F16D2500/7041F16D25/0638F16D48/062F16H61/0251F16H2063/303F16H2200/2012F16H2200/2043F16D25/10F16D2500/308F16H61/0021F16H61/0204F16H61/30F16H63/3026F16D48/02
Inventor 福田裕太郎笹原学齐藤忠志久保智宏
Owner MAZDA MOTOR CORP
Features
  • Generate Ideas
  • 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