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

Method for operating a continuously variable transmission incorporating a drive belt

A technology for continuously variable transmissions and transmission belts, which is applied to transmission parts, belts/chains/gears, mechanical equipment, etc. It can solve the problems of low transmission efficiency and low coolant supply temperature, allowing the supply temperature to increase and the supply flow rate to be improved. Effects of reductions, cooling effects, and/or power reductions

Active Publication Date: 2015-12-16
ROBERT BOSCH GMBH
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this regard, it has to be taken into account that the greater the supply flow and / or the lower the supply temperature of the coolant, the lower the overall efficiency of the transmission becomes because of the increased amount of power consumed by the cooling device

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 for operating a continuously variable transmission incorporating a drive belt
  • Method for operating a continuously variable transmission incorporating a drive belt
  • Method for operating a continuously variable transmission incorporating a drive belt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] exist figure 1 In the graph of , the dots represent the corresponding HRC hardness of 25 quench-hardened transverse elements ("specimens"), while the squares represent the corresponding HRC hardness of the same specimens after they were also subjected to extended tempering at 160°C for 400 hours. HRC hardness. The latter conditions are considered to be representative of the prevailing conditions in the transmission during normal operation of the transmission. From the graph, it appears that under these conditions the hardness of the samples does not drop below the commonly applied lower threshold of 58 HRC.

[0017] exist figure 2 In the graph of , the dots represent the corresponding HRC hardness of 25 additional quench-hardened samples, while the squares represent the corresponding HRC hardness of the same samples after they were also subjected to extended tempering at 180° C. for 400 hours. From the graph, it appears that under the latter conditions the hardness ...

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 for operating a continuously variable transmission incorporating a drive belt, said transmission further comprising a cooling device for supplying a flow of coolant to the drive belt. The method comprises the step of setting or controlling the flow such that the temperature of the coolant exceeds 90°C, preferably exceeds 100°C and remains below 140°C. The method reduces the effect required for cooling the transmission, ie increases the transmission efficiency, while still ensuring that the normal function of the drive belt continues to be performed.

Description

technical field [0001] The present invention relates to a method for operating a continuously variable transmission incorporating a drive belt, said transmission being known in the art, for example according to European patent EP-A-1167829. Background technique [0002] The drive belt of such a transmission is typically in the form of a so-called push belt, known per se, for example from European patent EP-A-0626526. Said known push belt comprises steel transverse elements contained within the belt slidingly relative to the periphery of its annular tensile members, which primarily have the function of restraining and guiding the transverse elements . The transverse elements of said known drive belt are made of carbon comprising steel 75Cr1 comprising 0.7% to 0.8% by weight of carbon and typically between 0.35% and 0.55% by weight of chromium. Typically, annular tensile members are also made of steel, especially maraging steel, and consist of two sets of multiple nested, ie...

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 Patents(China)
IPC IPC(8): F16H57/04
CPCF16H57/0489
Inventor C·J·M·范德梅尔
Owner ROBERT BOSCH GMBH