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System and method for controlling operation of an electric all-wheel drive hybrid vehicle

A hybrid vehicle and all-wheel drive technology, which is applied to the arrangement of multiple different prime movers of hybrid vehicles, general power plants, and motor vehicles, and can solve problems such as drive system interference.

Inactive Publication Date: 2012-10-24
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the engine needs to be restarted to participate in propelling such a vehicle, the application of engine torque recovered through the transmission while the vehicle is in motion can create undesirable driveline disturbances

Method used

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  • System and method for controlling operation of an electric all-wheel drive hybrid vehicle
  • System and method for controlling operation of an electric all-wheel drive hybrid vehicle
  • System and method for controlling operation of an electric all-wheel drive hybrid vehicle

Examples

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Embodiment Construction

[0021] Referring to the drawings, wherein like elements are designated with like numerals in the several figures, figure 1 A hybrid vehicle 10 is shown equipped with an electric all-wheel drive system. The vehicle 10 includes an internal combustion engine 12 configured to drive the vehicle through an automatic transmission 16 and a first axle 18 via a first set of wheels 14 . As focused herein, automatic transmission 16 is a multi-speed automatic transmission that uses a gear train and multiple torque-transmitting devices to produce discrete gear ratios between an input 20 and an output 22 of the transmission ( gear ratio).

[0022] Although not shown, those skilled in the art will appreciate that there are multiple transmission mechanisms that combine to form a functioning automatic transmission consisting of a series of planetary gear sets and torque transmitting devices such as clutches and / or brakes. The torque transmitting devices of the transmission 16 are intended to ...

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PUM

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Abstract

Provided are a system and a method for controlling operation of an electric all-wheel drive hybrid vehicle, including an engine, automatic transmission, and first and second motor-generators includes driving the vehicle via the second motor-generator. The method also includes determining desired engine speed and transmission gear ratio. The method also includes starting the engine via the first motor-generator and locking up all but one of a plurality of transmission torque transmitting devices required to be engaged for selecting the gear ratio. The method additionally includes modulating engagement of the one remaining torque transmitting device while controlling the engine to generate the desired engine speed. Furthermore, the method includes regulating the engine and the first motor-generator such that their combined torque is approximately zero, locking up the remaining torque transmitting device to select the gear ratio, and controlling the engine to generate desired transmission output torque.

Description

technical field [0001] The present invention relates to systems and methods for controlling the operation of an electric all-wheel drive hybrid vehicle. Background technique [0002] Modern vehicles are often configured as either two-wheel drive or all-wheel drive. Either type of vehicle may employ a conventional powertrain, in which a single engine is used to propel the vehicle, or a hybrid powertrain, in which two or more separate power sources (such as an internal combustion engine and an electric motor) are used used to accomplish the same task. Furthermore, a multi-speed automatic transmission may be used as part of either type of powertrain and may thus be used in a hybrid vehicle with all-wheel drive. [0003] To maximize hybrid powertrain fuel efficiency, a vehicle engine may be shut off when engine torque is not required to propel the vehicle. Such conditions may be encountered when a hybrid vehicle is held at a steady cruising speed, in a coasting mode (ie, when...

Claims

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Application Information

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IPC IPC(8): B60W20/00B60W30/182B60W10/06B60W10/08B60W10/10
CPCY02T10/6286B60K2007/0092B60W10/115B60W2510/244B60W2710/0627B60W20/00B60W10/06Y02T10/6243B60W2710/105B60W2710/0666B60K7/0007B60W10/30B60K6/52B60W2710/0644B60W2710/1005Y02T10/6265B60K6/448B60W20/40B60W10/08Y02T10/62B60W20/30
Inventor M-J.金S.H.斯韦尔斯N.舍尼克
Owner GM GLOBAL TECH OPERATIONS LLC
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