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System and method for monitoring the stability of a hybrid powertrain

A monitoring system and stability technology, which is applied to the layout of multiple different prime movers of hybrid vehicles and general power plants, power plants, etc., can solve problems such as instability or resonance of hybrid powertrain systems

Active Publication Date: 2014-08-13
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, closed-loop feedback control can cause instability or resonance in the hybrid powertrain system due to some undesired and unknown system characteristics

Method used

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  • System and method for monitoring the stability of a hybrid powertrain
  • System and method for monitoring the stability of a hybrid powertrain
  • System and method for monitoring the stability of a hybrid powertrain

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Embodiment Construction

[0063] The following description is merely exemplary in nature and is in no way intended to limit the disclosure, its application, or its uses. For purposes of clarity, the same reference numbers will be used in the drawings to identify similar elements. As used herein, the phrase "at least one of A, B, and C" should be construed as a logical (A or B or C) using a non-exclusive logical or. It should be understood that steps within a method may be executed in different order without altering the principles of the present disclosure.

[0064] As used herein, the term "module" refers to an application-specific integrated circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or grouped) and memory, a combination of Logic circuits, and / or other suitable components that provide the described functionality.

[0065] now refer to figure 1 , shows a system including an engine 14, an electrically variable transmission 10, a control system and a drive train that has b...

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Abstract

The present invention relates to systems and methods for monitoring the stability of a hybrid powertrain. A system and method for monitoring stability of a hybrid powertrain system includes monitoring output response signals of the system and its subsystems to their inputs to identify system operating conditions. For example, for a hybrid powertrain system equipped with an electrically variable transmission (EVT), three signals are monitored. These are the two motor speeds representing the immediate subsystem response to its feedback control input and the EVT output speed representing the overall system response. A stability monitoring system includes: an average value determination module, which determines an average value signal of the signal; and an oscillation determination module, which determines the signal oscillation signal according to the instantaneous signal and the average value signal. The monitoring system also includes: a signal mean value crossing determination module for determining a signal crossing with its mean value signal; and an oscillation peak detection, storage and comparison module for determining a system instability indicator for causing the control system to take corrective action.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application No. 61 / 229,927, filed July 30, 2009. The entire disclosure of the above application is incorporated herein by reference. technical field [0003] The present disclosure relates generally to hybrid vehicles, and more particularly, to a method and system for monitoring a powertrain of a hybrid vehicle. Background technique [0004] The background description given herein is for the purpose of generally presenting the context of the disclosure. To the extent described in this Background section, the works of the presently named inventors and aspects of this description that do not constitute prior art at the time of filing are neither expressly nor impliedly admitted to be prior art to the present invention. technology. [0005] Hybrid vehicles typically have two sources of power. The internal combustion engine is the first power source and the electric...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60K6/445B60W20/00
CPCY02T10/642B60L2240/421B60L2240/486Y02T10/6239B60W30/20B60W2510/104F16H2057/0012F16H2037/102F16H2061/6603B60W50/04F16H2037/106B60K6/445F16H2061/0078B60W20/00B60W2510/081Y02T10/62Y02T10/64B60W20/30B60W10/08
Inventor H·夏
Owner GM GLOBAL TECH OPERATIONS LLC
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