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Rollback control of a hybrid electric vehicle

一种车辆、倒溜的技术，应用在动力传动系统领域，能够解决车轮扭矩延迟等问题，达到防止车辆倒溜的效果

Inactive Publication Date: 2009-02-18
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the engine is used to provide torque to the wheels to move the vehicle, there is a delay before the wheel torque can increase sufficiently due to delays in engine starting, manifold filling, and input clutch activation

Method used

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  • Rollback control of a hybrid electric vehicle
  • Rollback control of a hybrid electric vehicle
  • Rollback control of a hybrid electric vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] As shown in Figures 1 and 2, the vehicle power transmission system 12 includes an engine 14, such as a diesel engine or a gasoline engine; a transmission 16, such as a double wet clutch power shift transmission or another multi-speed transmission without a torque converter; An electric motor 18 , such as a CISG (crankshaft-integrated starter-generator, crankshaft-integrated starter / generator) connected to the transmission input 20 ; and an additional electric motor 22 , such as an electric motor. The electric machine 18 provides rotational power to turn the engine 14 when the engine is started and generates electrical power which is provided directly to the electric machine 22 or the battery 23 or both.

[0022] An electric motor 22, sometimes referred to as an electronically controlled rear axle drive or electronically controlled rear axle drive (ERAD), is connected to the final drive of the rear axle or axle 24 and is electrically driven or hybrid (series / parallel) Dr...

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PUM

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Abstract

The invention provides a rollback control of a hybrid electric vehicle. In a powertrain that includes an engine driveably connected to a load and an electric machine driveably connected to the load, a method for controlling a vehicle located on an incline against rollback includes determining a magnitude of wheel torque required to prevent the vehicle from rolling back, determining whether the electric machine has a current torque capacity that is equal to or greater than the required wheel torque, using the electric machine to produce the required wheel torque provided the current torque capacity of the electric machine is able to produce the required wheel torque, and using the engine to produce the required wheel torque provided the torque capacity of the electric machine is unable to produce the required wheel torque.

Description

technical field [0001] The present invention relates generally to a powertrain for a hybrid electric vehicle (HEV) having an engine, an electric machine, and a multi-speed powershift transmission, and more particularly to using the powertrain to prevent vehicle rollback on an incline. Background technique [0002] A powershift transmission is an example of a power transmission in a motor vehicle that does not use a torque converter. A powershift transmission is a gear mechanism that produces multiple gear ratios in forward drive and reverse drive and has two input clutches that connect a power source, such as an engine or an electric motor, to two drive shafts. Powershift transmissions alternately transmit power to two shafts using synchronized clutch-to-clutch shifts. [0003] Powershift transmissions incorporate gear trains arranged in a double countershaft configuration between the transmission input and its output. One input clutch transfers torque between the input an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60K28/16B60K23/00B60L15/20B60K6/36B60W30/18
CPCY02T10/642Y02T10/6234B60W2540/106B60K6/442Y02T10/6265B60K1/02B60W10/113B60W2510/244B60K6/485Y02T10/6286Y10T477/23Y02T10/6226Y10T477/653B60L2260/167B60L2240/425Y02T10/7258B60W2710/0666B60W10/06B60W30/18118B60Y2400/428B60W2540/10B60W2520/10B60W10/08B60W20/00B60K6/52B60W2510/087Y10S477/905Y02T10/62Y02T10/64Y02T10/72B60K2006/268B60W10/10B60W2520/30B60W10/023
Inventor 安德鲁·J·西尔韦里伊哈勃·S·索里曼
Owner FORD GLOBAL TECH LLC
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