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Systems for managing downshifts in hybrid-electric vehicles

A hybrid electric and vehicle technology, which is applied in the arrangement of multiple different prime movers of hybrid vehicles and general power plants, and the use of engine-driven traction, etc., can solve the problems of complex operation mode transitions and other issues

Inactive Publication Date: 2016-02-03
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Transitions between operating modes are complicated by driver torque demand, vehicle operating speed, and vehicle operating conditions

Method used

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  • Systems for managing downshifts in hybrid-electric vehicles
  • Systems for managing downshifts in hybrid-electric vehicles
  • Systems for managing downshifts in hybrid-electric vehicles

Examples

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Embodiment Construction

[0025] Reference will now be made in detail to an embodiment of a system for managing downshifting of a hybrid electric vehicle. The system includes a multi-speed transmission having a hydraulically-operated clutch that selectively engages gear sets and an input shaft, an internal combustion engine selectively coupled to the input shaft of the multi-speed transmission, and an internal combustion engine coupled to the input shaft of the multi-speed transmission electric motor. The system further includes an electronic control unit in electronic communication with the electric motor, components of the internal combustion engine, and a valve body of the multi-speed transmission that directs hydraulic fluid within the multi-speed transmission to effectuate shifts between the plurality of gear sets. When the hybrid electric vehicle is operating in an electric mode of operation and the driver requests increased torque, the electronic control unit evaluates the torque request and det...

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Abstract

Systems for managing downshifts in hybrid-electric vehicles are disclosed. The systems include a multispeed transmission, an internal combustion engine selectively coupled to the multispeed transmission, an electric motor coupled to the multispeed transmission, and an electronic control unit. The electronic control unit is programmed to evaluate a torque demand, start the internal combustion engine, and pre-stage a downshift shift sequence by partially disengaging a second shift clutch and partially engaging a first shift clutch. The electronic control unit is also programmed to interrupt the downshift shift sequence until a pre-determined torque supplemental event occurs and later complete the downshift shift sequence by modifying the hydraulic pressure through the valve body to completely disengage a second gear set from the input shaft with the second shift clutch and completely engage a first gear set and the input shaft with the first shift clutch.

Description

technical field [0001] The present description relates generally to systems for managing downshifts in hybrid electric vehicles, and more particularly to systems for interrupting downshifts of a transmission in hybrid electric vehicles. Background technique [0002] Hybrid electric vehicles, including an internal combustion engine and an electric motor / generator, operate in a variety of operating modes, including an electric operating mode, a combustion operating mode, and a combustion / electric operating mode. Generally, a hybrid electric vehicle may switch from an electric mode of operation to a combustion / electric mode of operation or to a combustion mode of operation as torque demand from a driver of the hybrid electric vehicle increases. Additionally, an increased torque demand from the driver may initiate a downshift of the transmission so that the internal combustion engine and / or electric motor / generator can provide the requested torque to the drive wheels of the hybr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W10/06B60W10/08B60W10/101B60W20/30B60L50/16F16H61/12
CPCB60W10/06B60W10/08B60W10/101B60W20/00B60W2710/10B60W2710/08B60W2710/0666B60K6/387B60K6/547B60K2006/4825B60W2540/10B60W2540/106B60W2710/1083B60W20/30B60W20/40F16H61/16B60W10/115F16H2061/163Y10S903/93Y02T10/62Y02T10/72B60W30/19B60W20/15
Inventor 伯纳德·D·奈夫西马文·保罗·克拉斯卡罗杰·莱尔·哈夫马斯特姜洪桑原清二
Owner FORD GLOBAL TECH LLC
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