Systems and methods for meeting wheel torque demand in hybrid vehicle

A technology of engine torque and wheel, applied in the field of wheel torque, can solve problems such as incorrect sensor readings, clutch slipping, errors, etc.

Active Publication Date: 2018-08-24
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This discrepancy can be caused by clutch degradation, incorrect sensor readings, or errors in the clutch torque estimation algorithm
In such examples, when the transmission component i

Method used

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  • Systems and methods for meeting wheel torque demand in hybrid vehicle
  • Systems and methods for meeting wheel torque demand in hybrid vehicle
  • Systems and methods for meeting wheel torque demand in hybrid vehicle

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Embodiment Construction

[0021] The following description relates to systems and methods for meeting driver demanded wheel torque requests with transmission component input torque limited. Figure 1A-3 An exemplary hybrid vehicle system is shown that includes a driveline having an engine, an integrated starter / generator, a dual clutch transmission, and an electric machine positioned downstream of the dual clutch transmission. exist Figure 4 An exemplary timeline illustrating vehicle operator-requested increased vehicle acceleration in a non-hybrid vehicle with a dual-clutch transmission operating in a torque-tracking mode is depicted in . exist Figure 4 The example timeline depicted in , shows the delay between the requested and actual wheel torque increases. exist Figure 5 An exemplary timeline showing vehicle operator requested increased vehicle acceleration in a non-hybrid vehicle during an upshift event is depicted in . exist Figure 5 The example timeline depicted in FIG. 1 shows a delay ...

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Abstract

The present invention discloses systems and methods for meeting wheel torque demand in a hybrid vehicle. The hybrid vehicle comprises an engine, a dual clutch transmission coupled to a driveline of the vehicle downstream of the engine, and an electric machine coupled to the driveline downstream of the dual clutch transmission. In one example, a method comprises transferring transmission input torque through a clutch of the dual clutch transmission controlled to a first capacity, and in response to a desired transmission input torque exceeding the capacity, increasing torque output of the electric machine coupled downstream of the dual clutch transmission to assist in meeting a wheel torque demand. In this way, a driver-requested increase in acceleration may be met under conditions where transmission input torque is limited by clutch capacity.

Description

technical field [0001] The present invention generally relates to methods and systems for meeting driver demanded wheel torque with a transmission input torque limited. Background technique [0002] In situations where a vehicle operator indicates a desired increase in vehicle acceleration by depressing the accelerator pedal, transmission component input torque may have to be increased to achieve the desired increase in vehicle acceleration. However, if the requested desired transmission component input torque exceeds the current transmission component input torque limit, any excess transmission component input torque may simply accelerate the transmission component input speed, resulting in a large transmission loss for a vehicle transmission having one or more transmission clutches. clutch slipping and may not result in an increase in vehicle speed. In this case, the resulting clutch slip can lead to durability issues, in addition to failing to meet the driver's demand fo...

Claims

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Application Information

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IPC IPC(8): B60W20/10B60W10/02B60W10/06B60W10/08B60W10/10
CPCB60W10/02B60W10/06B60W10/08B60W10/10B60W20/10B60W2710/0666B60W2710/083B60W2720/30B60W2540/10Y10S903/93Y10S903/946B60Y2400/428B60K2006/4825B60W20/19B60W2510/0657B60W2510/1025B60W2710/027B60W2710/1005B60W10/113Y02T10/62B60W2520/30B60W2710/023B60W2720/106
Inventor 马修·约翰·谢尔顿杰弗里·艾伦·多林凯文·雷·鲁伊鲍
Owner FORD GLOBAL TECH LLC
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