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Method and apparatus for controlling a control variable of a powertrain system

A technology for controlling variables and powertrains, applied in control devices, transportation and packaging, transmission control, etc., to solve problems such as increased power consumption and reduced service life

Active Publication Date: 2016-12-21
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Changes in control variables (e.g., between engine on and off states or between fixed transmission gear ratios) may include some hysteresis, which may result in operator dissatisfaction and / or negative feedback to one or more Minimized state transitions that have an impact on the service life of components such as starter motors
However, continuous operation within the hysteresis window under non-optimal conditions may increase power consumption

Method used

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  • Method and apparatus for controlling a control variable of a powertrain system
  • Method and apparatus for controlling a control variable of a powertrain system
  • Method and apparatus for controlling a control variable of a powertrain system

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Embodiment Construction

[0010] Referring now to the drawings, wherein the illustrations are for the purpose of illustrating certain exemplary embodiments only and not for the purpose of limiting the invention, figure 1 A vehicle 100 including a powertrain system 20 coupled to a powertrain system 60 and controlled by a control system 10 is schematically shown. Throughout the specification, like numerals refer to like elements. The illustrated powertrain system 20 includes a plurality of torque-generative devices including an internal combustion engine 40 and at least one electric torque machine (electric machine) 35 that transmits torque to a driveline 60 through a transmission 50 . The concepts described herein may be applied to any suitable powertrain configuration including an internal combustion engine 40 coupled to a driveline 60 via a transmission 50 .

[0011] In one embodiment, the powertrain system 20 includes a torque machine 35 rotatably mechanically coupled to a crankshaft 36 of an engine...

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Abstract

A powertrain system is described, including a method for controlling a control variable for an element thereof. The method includes determining an initial state transition threshold and an associated hysteresis band for an operating parameter related to the control variable. The hysteresis band is decayed based upon operation in a present state of the control variable for powertrain element, and a preferred control variable for the powertrain element is selected based upon a comparison of the operating parameter and the initial state transition threshold accounting for the decayed hysteresis band for the operating parameter. The element of the powertrain system is controlled to the preferred state for the control variable.

Description

technical field [0001] The present invention relates to a powertrain system for a vehicle and an associated control program associated therewith. Background technique [0002] The powertrain system operates in response to operator requests and other conditions. Such operation includes controlling one or more control variables, such as selected transmission gear, engine on / off, and the like. Control and changes to various control variables can be performed to optimize operation, including changing control variables to reduce power loss, reduce power consumption, and improve performance. In this manner, the control variable may change in response to changes in operating conditions, including, for example, inputs from a vehicle operator, inputs related to external operating conditions, or inputs related to operation of the powertrain system. [0003] Changes in control variables (e.g., between engine on and off states or between fixed transmission gear ratios) may include som...

Claims

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Application Information

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IPC IPC(8): B60W10/06B60W10/11B60W10/26B60W20/00
CPCB60W10/06B60W10/11B60W10/26B60W20/00B60W2510/1005B60W2510/104B60W2510/0638B60W2540/12B60W2540/16B60W2540/10B60W50/10B60W10/105B60W30/18018B60W30/18072B60W50/06F16H61/10
Inventor K·Y·金A·H·希普J·怀斯
Owner GM GLOBAL TECH OPERATIONS LLC
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