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Feed forward and feedback adjustment of motor torque during clutch engagement

A clutch and disengagement clutch technology, applied in the field of clutch locking, can solve the problem of difficulty in estimating the torque of the engine and the clutch

Active Publication Date: 2013-12-04
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Difficulty and uncertainty in estimating engine and clutch torque due to complex transient dynamics makes motor torque compensation a challenging task
[0006] For engine start-up transients at MHT clutch engagement, there is the problem of vibration due to the excitation of mechanical resonances caused by multiple perturbations

Method used

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  • Feed forward and feedback adjustment of motor torque during clutch engagement
  • Feed forward and feedback adjustment of motor torque during clutch engagement
  • Feed forward and feedback adjustment of motor torque during clutch engagement

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Embodiment Construction

[0025] A detailed description of illustrative embodiments of the invention is provided below. The disclosed embodiments are exemplary of the invention, which may be embodied in various and alternative forms. The drawings are not necessarily drawn to scale. Some features can be zoomed in or out to reveal details of a particular part. Specific structural and functional details disclosed in this application are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art how to practice the invention.

[0026] refer to Figure 1A and Figure 1B , shows the modular hybrid transmission 10 in schematic form. The engine 12 is operatively connected to a starter 14 for starting the engine 12 when additional torque is required. A motor (or electric machine) 16 is operably connected to a driveline 18 . A disconnect clutch 20 is provided on the driveline 18 between the engine 12 and the electric machine 16 . Also provided on the driveli...

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Abstract

The invention relates to feed forward and feedback adjustment of motor torque during clutch engagement. A hybrid electric vehicle having a motor and an engine that are selectively connected on a driveline and controlled by a controller. The controller is configured to schedule additional motor torque to compensate for engine inertia drag based upon a clutch pressure value and a clutch slip speed value during a period of clutch engagement. The controller is also configured to maintain vehicle acceleration using a proportional integral controller to adjust the motor torque during a period of clutch engagement.

Description

technical field [0001] The present invention relates to the adjustment of motor torque during clutch engagement transients to counteract engine inertia drag, engine start disturbances, and clutch lockup. Background technique [0002] Hybrid vehicle architectures can take a variety of forms to operatively connect the battery, electric traction motor, and internal combustion engine together in the vehicle driveline. One structure proposed in development by the assignee of the present application is the Modular Hybrid Transmission (MHT). The key technology to realize MHT is the transmission without electric inverter (ECLT). To replicate the torque converter function of a conventional automatic transmission, the MHT drivetrain relies on active control of the starter / alternator as well as the disconnect clutch ahead of the motor and the launch clutch behind the motor. [0003] Elimination of the torque converter improves drivetrain efficiency, however, MHT drivability must meet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W10/06B60W10/10B60W20/00
CPCY02T10/6286B60W2050/0012B60W10/06B60W10/08B60W2510/0216B60W2710/083B60W20/40B60W20/00B60W10/02B60K6/48B60W2720/106Y02T10/6221B60W2050/001B60W2520/105Y02T10/62
Inventor 王青梁伟马克·斯蒂芬·耶马扎基沃尔特·约瑟夫·欧特曼瑞恩·亚伯拉罕·麦吉
Owner FORD GLOBAL TECH LLC
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