Asynchronous-synchronous clutch torque exchange in hybrid electric vehicles
A technology of hybrid electric and torque exchange, which is applied to hybrid vehicles, motor vehicles, vehicle components, etc., and can solve the problem of lack of speed ratio in hybrid transmissions
Inactive Publication Date: 2017-05-03
GM GLOBAL TECH OPERATIONS LLC
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- Summary
- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
[0004] Hybrid transmissions lack fixed ratios
Method used
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[0036] Referring to the drawings, wherein like reference numerals correspond to like or similar parts throughout the several views, and beginning with figure 1 , shows an exemplary hybrid electric vehicle 10 including a controller (C) 50 . Controller 50 communicates with various components of automatic transmission 12 via control signals (double arrow 11 ), such as signals transmitted and received on a controller area network (CAN) bus. The controller 50 is configured to selectively execute the steps of the shift control method 100 via associated hardware and software elements described herein, with reference to figure 2 and 2A An example of the control method 100 is described.
[0037] Execution of method 100 allows controller 50 to control predetermined shift events as defined herein when figure 1 The torque between the asynchronously controlled off-going clutch and the synchronously controlled oncoming clutch when the driver of the vehicle 10 demands continuous output t...
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Asynchronous-synchronous clutch torque exchange in a hybrid electric vehicle. A vehicle includes a torque source, a transmission, and a controller programmed to perform a method. In performing an associated method, responsive to a control target having a threshold priority, the controller determines whether continuous output torque is required throughout the torque exchange. When continuous output torque is required, the controller synchronizes and fills the oncoming clutch, estimates the capacity of the oncoming clutch, and expands the short term torque capacity of the oncoming clutch during torque exchanges. The initiation of torque commutation is delayed until the short-term torque capacity is sufficient to receive the full torque load from the off-going clutch without affecting output torque. The controller asynchronously controls the off-going clutch and synchronously controls the oncoming clutch throughout the torque exchange, and loads the synchronizing oncoming clutch as a function of simultaneously depleted offgoing clutch load via an expanded setting of the long-term torque capacity limit.
Description
technical field [0001] The present disclosure relates to methods and systems for switching torque from an asynchronous clutch to a synchronous clutch in a hybrid electric vehicle. Background technique [0002] The torque exchange between the clutches of a conventional automatic vehicle transmission is tightly controlled via a control module, such as a transmission control module (TCM). The control module of such a transmission commands an unloading of the torque capacity of a particular clutch (i.e., the off-going clutch) associated with the current speed ratio, and simultaneously applies another clutch (i.e., the off-going clutch) associated with the desired new speed ratio. clutch). Torque from one or more sources (typically the internal combustion engine and / or one or more electric traction motors) is then exchanged from the off-going clutch to the oncoming clutch to complete the shift. [0003] The clutches of a transmission can be described in terms of the modes used ...
Claims
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IPC IPC(8): B60W10/02B60W20/40
CPCB60W10/02B60W10/06B60W10/08B60W20/40Y10S903/902B60W2710/027B60W2510/105B60W2540/10B60W2540/16B60W2710/021B60W20/30B60W10/11
Inventor P.古普塔L.A.卡明斯基S.W.麦格罗根
Owner GM GLOBAL TECH OPERATIONS LLC