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

Continuously variable transmission (cvt) ratio control

A transmission ratio, controller technology, applied in the direction of transmission control, elements with teeth, belts/chains/gears, etc.

Inactive Publication Date: 2017-11-10
FORD GLOBAL TECH LLC
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is in contrast to other mechanical transmissions that offer a fixed number of gear ratios

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
  • Continuously variable transmission (cvt) ratio control
  • Continuously variable transmission (cvt) ratio control
  • Continuously variable transmission (cvt) ratio control

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] Embodiments of the present disclosure are described herein. It is to be understood, however, that the disclosed embodiments are merely examples and that other embodiments may take various and alternative forms. The figures are not necessarily to scale; some features may be exaggerated or minimized to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously utilize the embodiments. As will be understood by those of ordinary skill in the art, various features shown and described with reference to any one figure may be combined with features shown in one or more other figures to create a feature not explicitly shown or described. Example. The combinations of features shown provide representative embodiments for typical applications. Various combinations and modifications of the features consiste...

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 vehicle includes an engine with an associated engine-speed sensor, and wheels each having a respective wheel-speed sensor. The vehicle also includes a continuously variable transmission (CVT) coupled to the engine and configured to operate at variable input-to-output ratios. At least one controller is programmed to reduce the operating ratio of the CVT in response to the engine-speed sensor indicating the engine is operating at idle speed and the wheel-speed sensor indicating the velocity is approximately zero. This provides less noise, vibration and harshness in the vehicle due to the reduced ratio that is possible during conditions in which a vehicle launch in that reduced ratio may not be acceptable.

Description

technical field [0001] The present disclosure relates to a vehicle control system for controlling an input-to-output ratio of a continuously variable transmission (CVT). Background technique [0002] A continuously variable transmission (CVT) is an automatic transmission that can change seamlessly through an infinite number of effective gear ratios between maximum and minimum values. This is in contrast to other mechanical transmissions that offer a fixed number of gear ratios. Contents of the invention [0003] According to one embodiment, a vehicle includes an engine with an associated engine speed sensor and wheels each with a respective wheel speed sensor. The vehicle also includes a continuously variable transmission (CVT) coupled to the engine and configured to operate with a variable input to output ratio. At least one controller is configured to reduce the operating gear ratio of the CVT in response to the engine speed sensor indicating that the engine is operati...

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): F16H61/662F16H61/664F16H59/44F16H59/74
CPCF16H59/44F16H59/74F16H61/66236F16H61/6646F16H2061/66204F16H2061/6641F16H59/22F16H61/66259F16H59/54F16H2059/366F16H59/18F16H61/662
Inventor 姜洪戴征宇陈卫田蒂莫西·L·萨金特许阳
Owner FORD GLOBAL TECH LLC
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