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Control method for synchronous shifting of a transmission comprising a continuously variable planetary mechanism

A technology of transmission control and inverter control, applied in mechanical equipment, transmission, friction transmission, etc., can solve problems such as the complexity of the ratio control process

Inactive Publication Date: 2018-01-02
DANA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The combination of a CVT with one or more additional stages further complicates the ratio control process because a transmission can have multiple configurations to achieve the same final drive ratio

Method used

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  • Control method for synchronous shifting of a transmission comprising a continuously variable planetary mechanism
  • Control method for synchronous shifting of a transmission comprising a continuously variable planetary mechanism
  • Control method for synchronous shifting of a transmission comprising a continuously variable planetary mechanism

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Embodiment Construction

[0036] Described herein is an electronic controller capable of electronically controlling a variable ratio transmission having a continuously variable ratio section, such as a continuously variable transmission (CVT), an infinitely variable transmission (IVT), or a variator. The electronic controller may be configured to receive an input signal indicative of a parameter associated with the engine coupled to the transmission. The parameters may include throttle position sensor value, vehicle speed, gear selector position, user selectable mode configuration, etc., or some combination thereof. The gear selector position is usually the PRNDL position. The electronic controller can also receive one or more control inputs. The electronic controller can determine the active mode and converter ratio based on the input signal and the control input. The electronic controller may control the overall gear ratio of the variable ratio transmission by controlling one or more electronic act...

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Abstract

A control system for a multiple-mode continuously variable transmission is described as having a ball planetary variator operably coupled to multiple-mode gearing. The control system has a transmission control module configured to receive a plurality of electronic input signals, and to determine a mode of operation from a plurality of control ranges based at least in part on the plurality of electronic input signals. In some embodiments, the system also has a ratio schedule module configured to store at least one shift schedule map, and configured to determine a desired speed ratio of the variator based at least in part on the mode of operation; a variator control module configured to receive the desired speed ratio and configured to determine an actuator setpoint signal based at least inpart on the mode of operation; and a torque reversal module.

Description

[0001] cross reference [0002] This application claims the benefit of US Provisional Application No. 62 / 158,847, filed May 8, 2015, which is hereby incorporated by reference in its entirety. Background technique [0003] Continuously variable transmissions (CVTs) and substantially continuously variable transmissions are gaining acceptance in a variety of applications. The process of controlling the ratio provided by a CVT is complicated by the continuously variable or small ratio changes that a CVT exhibits. Furthermore, the range of ratios that can be achieved in a CVT is insufficient for some applications. The transmission may implement a combination of a CVT with one or more additional CVT stages, one or more fixed ratio range splitters, or some combination thereof, in order to expand the range of available ratios. The combination of a CVT with one or more additional stages further complicates the ratio control process because a transmission can have multiple configurati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H15/28
CPCF16H15/28F16H2037/025F16H61/0213F16H61/664F16H2061/0216F16H61/6646F16H61/702F16H15/503F16H37/021F16H61/0403
Inventor T·N·麦克勒莫雷J·M·大卫G·麦金杜
Owner DANA CORP