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Dynamic shift scheduling in hybrid vehicle having step ratio automatic transmission

A technology for hybrid vehicles and automatic transmissions, which is applied to the arrangement of multiple different prime movers of hybrid vehicles, general power plants, motor vehicles, etc.

Inactive Publication Date: 2013-11-13
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A further challenge for vehicles with an automatic transmission (with a torque converter) is determining the proper gear ratio for best efficiency and fuel economy

Method used

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  • Dynamic shift scheduling in hybrid vehicle having step ratio automatic transmission
  • Dynamic shift scheduling in hybrid vehicle having step ratio automatic transmission
  • Dynamic shift scheduling in hybrid vehicle having step ratio automatic transmission

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Embodiment Construction

[0029] As required, specific embodiments of the present invention are disclosed herein; however, it is to be understood that the disclosed embodiments are merely exemplary of the invention, which may be embodied in various and alternative forms. The figures are not necessarily to scale; some features may be exaggerated or minimized to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present invention.

[0030] First refer to figure 1 , a vehicle 10 is shown including a hybrid powertrain 12 having a first power source in the form of an internal combustion engine 14 and a second power source in the form of a battery 16 driving an electric machine 18 (operable as an electric motor or generator). Two power sources. The engine 14 is selectively connected and disconnected from the remain...

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Abstract

A hybrid vehicle having an engine and motor in series with a step ratio automatic transmission shifts the transmission according to a first shift schedule based on driver demand and output speed or a second shift schedule based on efficient operating speeds of the engine and motor associated with the target gear ratio. A powertrain controller continually calculates engine and motor speeds and torques associated with target gear ratios for the second shift schedule to select a gear ratio based on operating efficiency. An arbitration strategy may compare a weighted target gear ratio from the first schedule shift schedule to a weighted target gear ratio from the second shift schedule to dynamically select a desired target gear for powertrain control management.

Description

[0001] This application claims the benefit of U.S. Provisional Application No. 61 / 643,795, filed May 7, 2012, and claims priority to U.S. Application No. 13 / 875,799, filed May 2, 2013, both of which are published The entire content of is incorporated herein by reference. technical field [0002] The present disclosure relates to a shift schedule for a hybrid vehicle with an automatic stepped transmission. Background technique [0003] Traditional shift schedules for automatic transmissions are typically controlled as a function of accelerator pedal position (interpretable as a torque demand input) and transmission output shaft rotational speed or equivalent vehicle speed. Shift schedules may vary by application or vehicle platform to provide desired handling, performance, and fuel economy. Handling is a subjective factor related to the driver's expectations of vehicle performance with respect to any associated noise, vibration and harshness (NVH) caused by the vehicle, engi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W30/19B60W20/00
CPCF16H61/0204B60Y2200/92B60W20/30Y10S903/945F16H61/0213B60K2006/4825Y02T10/6252B60W20/00B60W2510/081F16H2061/0227B60W30/19B60W2510/1025B60W10/115Y02T10/62
Inventor 戴征宇姜洪
Owner FORD GLOBAL TECH LLC
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