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Method and apparatus to operate a powertrain system including an electric machine having a disconnected high-voltage battery

A power system, high-voltage technology, used in mechanical equipment, engine starting, engine motor starting, etc., can solve problems such as field excitation loss, vehicle shutdown, continuous auxiliary power loss, etc.

Active Publication Date: 2012-11-28
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This can lead to loss or insufficiency of field excitation, especially for asynchronous machine based motor / generator units, which in turn can lead to loss of continuous auxiliary electric power generation
Insufficient electric auxiliary power can cause the vehicle to shut down, resulting in a walk home event

Method used

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  • Method and apparatus to operate a powertrain system including an electric machine having a disconnected high-voltage battery
  • Method and apparatus to operate a powertrain system including an electric machine having a disconnected high-voltage battery
  • Method and apparatus to operate a powertrain system including an electric machine having a disconnected high-voltage battery

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Embodiment Construction

[0052] Referring now to the drawings, wherein the drawings are for illustration of certain exemplary embodiments only and are not intended to be limiting, figure 1 A propulsion system 10 for a vehicle is schematically illustrated. Propulsion system 10 includes a powertrain including an internal combustion engine 12 rotationally coupled to a motor / generator unit (MGU) 26 and a transmission 14 coupled to a driveline including wheels 16 . The transmission 14 is configured to transmit tractive torque to the wheels 16 in response to control signals originating from the control module 5 . The internal combustion engine 12 produces torque, which is transmitted to the transmission 14 . The MGU 26 is configured to transmit torque to the engine 12 . The MGU 26 is configured to react torque from the engine 12 during a regeneration period to generate electrical power. This includes transferring tractive torque from the wheels 16 through the transmission 14 and engine 12 to the MGU 26 d...

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PUM

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Abstract

A powertrain system includes an electric motor / generator unit. Upon detecting an open high-voltage switch associated with a high-voltage DC electrical bus, low-voltage electrical power is employed to energize the high-voltage DC electrical bus, control parameters are adjusted to operate the electric motor / generator unit in a fault tolerant electric generation mode, an internal combustion engine is operated to spin the electric motor / generator unit, and the electric motor / generator unit is operated in the fault tolerant electric generation mode.

Description

technical field [0001] The present invention relates to electrical power flow in hybrid electric vehicles. Background technique [0002] The statements in this section merely provide background information related to the present disclosure. Accordingly, such statements are not intended to constitute an admission of prior art. [0003] Vehicles with hybrid powertrains selectively use different energy sources to generate torque and power in response to operator commands to achieve optimal fuel efficiency. This includes the optional use of internal combustion engines and motor / generator units connected to high voltage battery modules or energy storage systems for propulsion and operational control. A hybrid powertrain includes an engine stop / start system in which the engine is automatically stopped and automatically restarted using a motor / generator unit during continued vehicle operation. The system preferably includes a regenerative braking system for recharging the high v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L15/02B60L11/18B60L50/11
CPCB60W20/00Y02T10/6286B60W50/029B60W50/023B60L11/14B60W10/06B60W20/50Y02T10/7077B60W10/26B60L11/1868B60W10/08F02N11/006B60W2050/0027B60L50/16Y02T10/62Y02T10/7072Y02T10/70
Inventor C.S.纳穆杜里S.戈帕拉克里什南K.D.范马宁B.M.路德维希B.H.裴
Owner GM GLOBAL TECH OPERATIONS LLC