Unlock instant, AI-driven research and patent intelligence for your innovation.

Adaptive clutch slip learning for critical capacity clutch fusing in a continuously variable transmission

A continuously variable transmission, clutch technology, applied in clutches, elements with teeth, transmissions, etc., can solve problems such as fuel economy impact

Active Publication Date: 2018-10-23
GM GLOBAL TECH OPERATIONS LLC
View PDF13 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this maximum clamping pressure has a negative impact on fuel economy

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
  • Adaptive clutch slip learning for critical capacity clutch fusing in a continuously variable transmission
  • Adaptive clutch slip learning for critical capacity clutch fusing in a continuously variable transmission
  • Adaptive clutch slip learning for critical capacity clutch fusing in a continuously variable transmission

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] Reference will now be made in detail to several examples of the present disclosure which are illustrated in the accompanying drawings. Where possible, the same or similar reference numerals are used in the drawings and descriptions to refer to the same or similar parts or steps. The drawings are presented in simplified form and are not drawn to precise scale. For convenience and clarity only, directional terms such as top, bottom, left, right, upward, above, above, below, below, rear and front may be used with respect to the drawings. These and similar directional terms should not be construed to limit the scope of the present disclosure in any way.

[0023] Referring now to the drawings, wherein like reference numerals correspond to like or analogous parts throughout the several views, figure 1 with 2 Elements of a motor vehicle propulsion system 10 are schematically illustrated including an engine 12 , such as an internal combustion engine, rotatably coupled to a c...

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 continuously variable transmission, a control system, and a method are provided. The control system and method are configured to learn a desired running pressure to be applied to a clutch that is lower than a pulley clamping pressure and higher than a pressure at which the clutch would slip (a clutch critical pressure), so that the clutch can act as a fuse to avoid pulley slip. A plurality of clutch slip tests are performed, each of which include decreasing pressure supplied to the clutch until a clutch slip occurs. Clutch slip data points are collected at the point of slip and used to determine a gain and an offset, where the gain is a clutch pressure versus clutch torque capacity gain, and the offset is a clutch pressure offset, which is used to determine the clutch critical pressure.

Description

technical field [0001] The present disclosure relates to a continuously variable transmission (CVT), a control system, and a method for controlling a clutch of the CVT. Background technique [0002] A continuously variable transmission (CVT) is a type of power transmission capable of continuously varying the output / input speed ratio within a range between a minimum (underdrive) ratio and a maximum (overdrive) ratio, thus allowing infinitely variable selection of engine operation, It achieves a preferred balance of fuel consumption and engine performance in response to output torque requests. Unlike conventional gear transmissions, which use one or more planetary gear sets and multiple rotating and braking friction clutches to establish discrete gear states, a CVT uses a system of variable diameter pulleys for infinitely variable selection of gear ratios. [0003] The pulley system, commonly referred to as a variator assembly, can shift anywhere within a calibrated range of ...

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): F16D48/06F16D48/10
CPCF16D48/064F16D48/10F16D2500/30401F16D2500/30406F16H2061/6618F16H61/061F16H61/66272F16H2061/064F16H2061/6604F16D2500/30421F16D2500/30426F16D2500/50281F16D2500/70406F16D48/06F16H37/022F16D2500/10412F16D2500/70426F16D2500/30803F16D2500/3109F16D2500/3144F16D2500/30806F16D2500/3024F16D2500/1026F16D2500/30415F16D2500/1088F16D2500/50236F16D2500/70605F16H9/18
Inventor J·L·阿宾顿C·达夫蒂拉C·赫尔顿格伦T·R·斯托克代尔李东旭
Owner GM GLOBAL TECH OPERATIONS LLC