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Output torque management in a vehicle having an electric powertrain

A technology for outputting torque and vehicles, applied in hybrid vehicles, electric vehicles, motor vehicles, etc., can solve problems such as long shifting time

Inactive Publication Date: 2012-04-04
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Shifting times are relatively long in this transmission

Method used

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  • Output torque management in a vehicle having an electric powertrain
  • Output torque management in a vehicle having an electric powertrain
  • Output torque management in a vehicle having an electric powertrain

Examples

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Embodiment Construction

[0015] Referring to the drawings, a vehicle 10 is schematically shown at figure 1 middle. The vehicle 10 includes a controller 24 configured to perform a method 100, an embodiment of which is image 3 shown and described in detail below. Vehicle 10 is any vehicle having an electric vehicle (EV) powertrain, such as a battery electric vehicle (BEV), an extended-range electric vehicle (EREV), a hybrid electric vehicle (HEV), or any other vehicle capable of propulsion in EV mode, i.e., only A vehicle that is propelled using electric motor torque. The controller 24 automatically manages sudden increases in output torque capability on the vehicle 10 by controlling the rate of change of actual output torque when an increase in output torque capability is perceived.

[0016] The high voltage electric traction motor 12 outputs motor torque to a transmission 14 and thereby powers the vehicle 10 in EV propulsion mode. An internal combustion engine 18 may be included, which may be use...

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PUM

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Abstract

The present invention discloses a method for managing a threshold increase in output torque capability in a vehicle including the steps of detecting the threshold increase in output torque capability using a controller, and automatically limiting, via the controller, a rate of change of an actual output torque from a transmission of the vehicle in response to the threshold increase. The actual output torque is provided via a traction motor solely using battery power from an energy storage system. The method may include calculating a difference between the threshold increase and the actual output torque, and limiting the rate of change using a rate that is proportional to the difference. A vehicle includes the ESS, a transmission, and a controller. An output member of the transmission is powered using electrical energy from the ESS. The controller manages an increase in output torque capability as noted above.

Description

technical field [0001] The present invention relates to output torque management in vehicles with electric powertrains. Background technique [0002] Battery Electric Vehicles (BEV), Extended Range Electric Vehicles (EREV) and Hybrid Electric Vehicles (HEV) can operate in at least one electric-only propulsion mode, i.e. EV ( EV) mode is driven. One or more high voltage traction motors provide sufficient motor torque to power the vehicle in this mode. Each traction motor is powered via battery power supplied by a high voltage energy storage system (ESS). The ESS can be charged on demand during vehicle operation, such as during regenerative braking. The ESS can also be charged when the vehicle is not running by connecting the ESS to an off-vehicle power source. When the state of charge of the ESS is substantially depleted in the EREV, the small internal combustion engine can be automatically started to provide power to the generator. The power output from the generator pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W10/06B60W10/08B60W10/26B60W30/18
CPCB60W2540/10B60W2710/105Y02T10/7258B60L15/20B60W2710/1055B60W2510/244B60L11/00B60W10/26B60W2510/105B60W10/08Y02T10/7005B60W20/00B60L50/00Y02T10/64Y02T10/72B60W2710/085
Inventor M.阿内特A.K.鲁斯托尼S.W.麦克格罗甘G.塔玛伊
Owner GM GLOBAL TECH OPERATIONS LLC
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