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Method of operating a hybrid powertrain

A hybrid and powertrain technology, which is applied to the arrangement of multiple different prime movers and power plants of hybrid vehicles and general power plants, and can solve problems such as sudden vehicle jumps and output torque spikes.

Active Publication Date: 2011-07-20
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When operating in a fuel-off deactivation condition (i.e., fuel flow to the engine cannot be cut off), and the high-voltage battery is at or above a predetermined upper limit, then excess torque produced by the engine is transmitted to the transmission, causing output torque spikes
Output torque spikes are not desired and may cause the vehicle to jerk

Method used

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  • Method of operating a hybrid powertrain
  • Method of operating a hybrid powertrain

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Embodiment Construction

[0045] A method of operating a hybrid powertrain of a vehicle is disclosed. The hybrid powertrain includes an engine, a transmission, an electric motor, and a high voltage battery.

[0046] The engine preferably includes, but is not limited to, an internal combustion engine. However, the engine may include some other types of engines. The engine is powered by fuel. Fuels may include, but are not limited to, gasoline or diesel. It is well known that internal combustion engines convert energy stored in fuel to rotate a crankshaft, which outputs engine torque. The specific type, model, size and / or configuration of the engine is not relevant to the disclosed methods. Therefore, the engine will not be described in detail here.

[0047] The electric motor preferably comprises an electric motor / generator and is coupled to both the engine and the transmission. The electric motor / generator is configured to transmit torque to and from both the engine and the transmission. When op...

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PUM

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Abstract

A method of operating a hybrid powertrain including an engine, an electric motor and a high voltage battery includes preventing a fuel flow to the engine when the high voltage battery includes a state of charge at or above a pre-defined upper limit, and driving the engine with torque supplied by the electric motor when the hybrid powertrain is operating in a fuel-off disabled condition to maintain operation of the engine without producing any engine torque.

Description

technical field [0001] The present invention relates to a method of operating a hybrid powertrain. Background technique [0002] A hybrid powertrain typically includes an engine, transmission, electric motor / generator, and high voltage battery. A transmission is coupled to the engine, as is known. The engine produces engine torque, which is supplied to the transmission. Alternatively, an electric motor / generator may convert current from a high voltage battery into torque, which is supplied to the transmission. A transmission includes a plurality of gears operable to achieve a plurality of gear ratios, as is known. The transmission converts torque from the engine and / or electric motor / generator into output torque that is supplied to wheels to drive the vehicle. Excess torque from the engine not required to propel the vehicle can be used by the electric motor / generator to generate electricity to charge the high voltage battery. [0003] In operation, high voltage batterie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W10/06B60W10/08B60W10/26B60W20/00
CPCB60W2710/0616B60W10/06Y02T10/6226B60L2240/443B60K6/485B60W2510/244B60W10/26B60W2510/0657B60W20/00B60L58/15Y02T10/62Y02T10/70B60W20/13
Inventor J·杨查克A·H·希普N·A·查佩伦S·W·麦格罗根J·赛登斯特里克
Owner GM GLOBAL TECH OPERATIONS LLC