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

Controller for continuously variable transmission

A continuously variable transmission and control device technology, which is applied in the direction of transmission control, toothed components, belts/chains/gears, etc., and can solve belt and pulley slippage, oil pressure response lag, clamping pressure control delay, etc. problems, to achieve the effect of preventing the belt from slipping, increasing the clamping pressure, and preventing the increase of the grip force

Active Publication Date: 2017-04-19
JATCO LTD +1
View PDF7 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On such a road surface, it takes time to determine whether the road surface is not good, and sometimes the response of the oil pressure is delayed, and the control of the clamping pressure is delayed, and there is a problem of slipping between the belt and the pulley.

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
  • Controller for continuously variable transmission
  • Controller for continuously variable transmission
  • Controller for continuously variable transmission

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] Hereinafter, embodiments of the present invention will be described based on the drawings. In this specification, "good road surface" refers to paved roads such as asphalt and concrete, and "poor road surface" refers to all unpaved road surfaces such as sandy soil roads and stone roads. Bad roads also include roads where there are obstacles such as large stones, woods, and curbs in the direction of travel, or where the road surface is sunken, where the road surface has severe unevenness, and where sudden torque is input from the drive wheels to the transmission. The so-called "sudden torque" refers to the sudden large torque temporarily input from the drive wheels to the transmission when the vehicle drives over an obstacle, or when the idling drive wheels touch the ground after overcoming an obstacle.

[0015] figure 1 It is a system diagram showing the structure of the control device of the continuously variable transmission of the embodiment. In a belt type continu...

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 controller for a continuously variable transmission (1) is provided with: a wheel speed sensor (21F) for detecting the rotational speed of a driving wheel; a wheel speed sensor (21R) for detecting the rotational speed of a driven wheel; and a transmission controller (12). When the wheel speed difference between the driving wheel and the driven wheel is equal to or greater than a start determination threshold value, the transmission controller (12) determines the road surface being travelled to be a bad road (S1) and then increases the clamping force of the continuously variable transmission (1) (S2). When a vehicle speed vibration is detected on the basis of a detection value acquired by the wheel speed sensor (21R), and it is found that the wheel speed difference is equal to or less than a release determination threshold value (S3) and the detected vibration is equal to or less than a predetermined vibration value (S5), the transmission controller (12) reduces the raised clamping force (S8).

Description

technical field [0001] The invention relates to a control device of a continuously variable transmission. Background technique [0002] As a technology for accurately determining the road surface state and controlling the clamping pressure of the belt-type continuously variable transmission suitable for the actual road surface state, there is a technology described in Patent Document 1. Specifically, a band-pass filter process is performed on the detected value of the rotational speed of the driving wheels, a value obtained by this process is integrated over time, and the road surface state is determined based on the total time integrated value. When it is determined that the road surface state is not a good road surface, and when it is determined that the road surface is good, the clamping pressure is increased. [0003] However, in order to correctly determine the state of the road surface, the detection value is processed with a band-pass filter and integrated over time....

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): F16H61/12F16H59/40F16H61/662
CPCF16H59/40F16H61/12F16H2059/405F16H61/66272F16H61/662F16H59/42F16H59/46F16H59/48F16H2061/1284F16H2061/66277
Inventor 阿部浩介诹访部智之塚本晋
Owner JATCO LTD
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