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Shift point strategy for hybrid electric vehicle transmission

A technology of hybrid electric vehicles and hybrid power, which is applied to the layout of multiple different prime movers of hybrid electric vehicles and general power plants, electric vehicles, etc., and can solve problems such as difficulties in predetermined shift point maps

Inactive Publication Date: 2007-06-20
EATON INTELLIGENT POWER LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, developing a map of predetermined shift points for hybrid vehicles is more difficult due to the uncertainty introduced by typically using multiple inputs to provide torque to the vehicle drivetrain

Method used

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  • Shift point strategy for hybrid electric vehicle transmission
  • Shift point strategy for hybrid electric vehicle transmission
  • Shift point strategy for hybrid electric vehicle transmission

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Embodiment Construction

[0015] Referring to FIG. 1 , a hybrid powertrain system 20 is shown in accordance with an embodiment of the systems and methods of the present invention. In the illustrated embodiment, the powertrain system 20 includes a first traction machine 22, such as a spark-ignition or compression-ignition internal combustion engine, and a hybrid transmission 24 that includes a second engine, such as an electric motor / generator or a hydraulic motor / pump. Two tractors 26. A master synchronizing clutch 28 is disposed between the first prime mover 22 and the hybrid transmission 24 to selectively engage or disengage the first prime mover 22 to and from the hybrid transmission 24 . Primary synchronizing clutch 28 may be any number of clutches currently known in the art, such as hydraulic or electric friction clutches. In this specification and the appended claims, when the term "engaged" is mentioned in relation to a clutch, it shall be understood to result in a unidirectional or bidirection...

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PUM

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Abstract

A method for determining a shift point strategy in a hybrid vehicle includes providing at least two power sources, selectively coupling the two or more power sources to a hybrid vehicle transmission, defining an input shaft speed for best acceleration, defining an input shaft speed for best fuel economy, determining driver intent compared to the best acceleration and the best fuel economy, and setting a shift point of the hybrid vehicle transmission based, at least in part, on the driver intent.

Description

[0001] Associate application [0002] This application claims priority to Provisional Patent Application Serial No. 60 / 585,896, filed July 7, 2004, entitled "Shift Point Strategy for Hybrid Electric Vehicle Transmission," which is incorporated by reference in its entirety at in this manual. technical field [0003] The systems and methods of the present invention relate generally to hybrid vehicles, and more particularly to systems and methods for establishing shift point strategies in hybrid vehicles. Background technique [0004] Automobile manufacturers are constantly striving to improve the fuel economy of motor vehicles. Improvements to fuel economy generally involve weight reduction, aerodynamic improvements, changes in power input, and reduced power loss through the vehicle's powertrain. However, the need for improved fuel economy is generally offset by the need to provide improved comfort, power, and convenience to the vehicle operator. For example, manual transmi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/02B60W20/00B60W10/10
CPCB60W30/19F16H2061/0012B60W10/11B60W10/06F16H61/10Y02T10/6286B60W10/10B60W10/08F16H2061/022B60K6/547B60W20/00Y02T10/6221Y02T10/56B60K6/48F16H61/0213B60L15/2054B60L2240/423B60L2240/486B60L2250/26Y02T10/40Y02T10/62Y02T10/64Y02T10/72Y02T10/84B60W20/30
Inventor G·A·布鲁纳曼L·J·布拉克尼
Owner EATON INTELLIGENT POWER LTD