Wet-type double-clutch automatic transmission electromagnetic valve characteristic curve compensation method

A technology of wet dual clutch and automatic transmission, which is applied in transmission control, components with teeth, belts/chains/gears, etc. It can solve problems such as large influence and reduced control accuracy, and achieve simple algorithm and improved control Accuracy, the effect of realizing precise control

Active Publication Date: 2014-03-12
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
View PDF7 Cites 41 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the characteristic curve of the solenoid valve is greatly affected by the temperature of the transmission oil, and is affected by the physical characteristics of the solenoid valve itself. , when working conditions such as tip in (acceleration) and tip out (deceleration) chang

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
  • Wet-type double-clutch automatic transmission electromagnetic valve characteristic curve compensation method
  • Wet-type double-clutch automatic transmission electromagnetic valve characteristic curve compensation method
  • Wet-type double-clutch automatic transmission electromagnetic valve characteristic curve compensation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] Depend on figure 1 It can be seen that when a current of a certain intensity is applied to the solenoid valve, the pressure of the solenoid valve generated under different transmission oil temperature conditions is not the same, that is to say, the transmission oil temperature will affect the P-I characteristics of the solenoid valve. While the vehicle is running, the change of the transmission oil temperature is inevitable.

[0029] Depend on figure 2 and image 3 It can be seen that even under the same transmission oil temperature condition, the P-I characteristic curve obtained during the current rising process and the current falling process is not the same. For example in figure 2 In the middle, it is also minus 20°C, when the current intensity increases from 300mA to 400mA, the pressure value of the solenoid valve is above 300kPa, but when the current intensity decreases from 500mA to 400mA, the pressure value of the solenoid valve is below 300kPa, that is to...

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 provides a wet-type double-clutch automatic transmission electromagnetic valve characteristic curve compensation method. The method comprises the following steps: computing the current expectation pressure of the clutch under actual working condition, judging whether to perform compensation treatment, wherein the compensation treatment comprises oil temperature compensation and/or hysteresis compensation, if so, obtaining a compensation value, and computing a final expectation pressure according to the compensation value and the current expectation pressure; searching a corresponding current value in the electromagnetic valve characteristic curve under basic oil temperature according to the final expectation pressure, and exerting the searched current value on the electromagnetic valve; if not, searching the corresponding current value in the electromagnetic valve characteristic curve under base oil temperature according to the current expectation pressure, and exerting the searched current value on the electromagnetic valve. The control precision of a transmission control unit to the transmission is improved.

Description

technical field [0001] The invention relates to the field of automobile control, in particular to the field of gearbox control. Background technique [0002] The wet dual-clutch automatic transmission includes two clutches, which are respectively connected to two input shafts, and the odd-numbered and even-numbered gears of the transmission are respectively distributed on the two input shafts. The combination and separation of the two clutches are controlled by the oil pressure in the hydraulic oil circuit, so as to realize torque transmission and disconnection. [0003] The combination, separation, and cooling of the two clutches in the wet dual-clutch automatic transmission, as well as the synchronizer and shift fork actions corresponding to each gear, are all realized by controlling the pressure in the oil circuit through the transmission hydraulic module. [0004] The control logic and control software of the wet dual clutch automatic transmission are stored in the tran...

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): F16H61/02
CPCF16H61/0251F16H2061/0258
Inventor 黄孝奎彭丽张友皇
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP 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