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Method of managing output chatter or clunk in a strong hybrid vehicle

A hybrid vehicle, dull technology, used in hybrid vehicles, motor vehicles, power management, etc., to solve problems such as transmission system output chatter

Active Publication Date: 2018-02-16
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, a condition known as driveline output chatter can result when the transmission is operated in neutral due to transient torque disturbances from the engine

Method used

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  • Method of managing output chatter or clunk in a strong hybrid vehicle
  • Method of managing output chatter or clunk in a strong hybrid vehicle
  • Method of managing output chatter or clunk in a strong hybrid vehicle

Examples

Experimental program
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Embodiment Construction

[0043] With reference to the drawings, the vehicle 10 is figure 1 As shown in, the vehicle 10 has an internal combustion engine (E) 12, a transmission 14, and a controller (C) 50. The vehicle 10 is a strong hybrid vehicle. That is, the transmission 14 is connected to or includes a variety of possible input torque sources, including the engine 12 and the electric traction motor 16 (M A ). Additional electric traction motors may be used as part of the transmission 14 without departing from the scope of the unforeseen invention.

[0044] The transmission 14 is shown in a schematic lever diagram format to include a planetary gear set 30. As is known in the art, the multiple interconnected gear sets of the transmission can be schematically reduced to such figure 1 The single equivalent gear set shown in. therefore, figure 1 The single planetary gear set depicted in does not limit the method to a transmission with only one planetary gear set.

[0045] Whenever the transmission 14 is o...

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PUM

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Abstract

A method for managing output rumble in a neutral state in a strong hybrid vehicle includes calculating a motor torque for an electric traction motor connected to a third node of a planetary gear set. The motor torque is calculated as the product of a predetermined inertia of the electric traction motor, a calculated engine acceleration, and a gear ratio of the planetary gear set. Commanding the calculated motor torque from the electric traction motor via the controller in a direction opposite to the calculated output shaft acceleration includes communicating the motor torque command to the electric traction motor for the duration of the neutral state. The vehicle includes an engine, a shock absorber assembly, a transmission, and a controller.

Description

Technical field [0001] The present disclosure relates to the management of the output bump of the transmission system in a strong hybrid vehicle. Background technique [0002] Strong hybrid vehicles use an internal combustion engine and one or more electric traction motors to provide input torque to the gear set of the transmission. The available modes of strong hybrid power may therefore include an engine only mode, one or more electric only / electric vehicle modes, and multiple hybrid or electric variable transmission modes. In some strong hybrid designs, there is no method for opening the mechanical path between the engine and the output shaft of the transmission. In this design, neutral is achieved by rotating one of the electric traction motors in the opposite direction when idling to nullify the engine speed. This is known as "gear neutral". Therefore, due to the transient torque disturbance from the engine, when the transmission is operating in neutral, a condition calle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W20/10B60W30/188B60W30/20B60W10/06B60W10/08
CPCB60W10/06B60W10/08B60W20/10B60W30/1888B60W30/20B60W2710/083B60L2260/24B60L2270/145Y02T10/72B60W20/15B60L15/20Y10S903/902Y02T10/64B60W20/11
Inventor C-S.刘叶少春R.L.莫里斯
Owner GM GLOBAL TECH OPERATIONS LLC