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Slow travel compensation using road slope and mass estimates

A technology of road slope and estimation value, which is applied in the field of vehicle systems and can solve problems such as the influence of the drive train

Active Publication Date: 2021-02-02
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Any disturbance in the driveline may affect the ability to obtain the desired transmission input shaft speed

Method used

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  • Slow travel compensation using road slope and mass estimates
  • Slow travel compensation using road slope and mass estimates
  • Slow travel compensation using road slope and mass estimates

Examples

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Embodiment Construction

[0033] The present disclosure relates to vehicle systems and methods for controlling torque delivery of an electric machine of an electric vehicle during creep conditions of the vehicle. The vehicle system calculates an estimate of the road grade and an estimate of the vehicle mass. These estimates are used to derive torque offset values ​​that are added to other required torque loads to calculate feedforward torque. Feedforward torque is combined with feedback torque or torque adjustments to compensate for gradient or mass changes during vehicle creep conditions. These and other features are discussed in more detail below.

[0034] figure 1 An electric vehicle 10 is schematically illustrated. Although shown in some embodiments as a hybrid electric vehicle (HEV), the present disclosure may be applicable to other types of electric vehicles. Also, despite figure 1 Certain component relationships are described in , but this description is not intended to limit the disclosure...

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Abstract

A method according to an exemplary aspect of the present disclosure includes, among other things, controlling a torque output of an electric machine of an electric vehicle during a creep condition, calculating the torque output based on at least a road gradient estimate and a vehicle mass estimate.

Description

technical field [0001] The present disclosure relates to a vehicle system and method related to an electric vehicle. As disclosed herein, the torque output of an electric vehicle's electric machine may be adjusted to compensate for changes in road gradient and vehicle mass during a vehicle creep state of the electric vehicle. Background technique [0002] The need to reduce fuel consumption and emissions from automobiles and other vehicles is well known. Accordingly, vehicles that reduce or completely eliminate reliance on internal combustion engines are being developed. Electric vehicles are one type of vehicle currently being developed for this purpose. In general, electric vehicles differ from conventional motor vehicles in that they are optionally propelled by one or more electric motors powered by batteries. In contrast, conventional motor vehicles rely solely on the internal combustion engine to propel the vehicle. [0003] Some electric vehicles spin down the moto...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W10/08B60W40/00B60W40/076
CPCB60W10/08B60W40/00B60W40/076B60W2710/083B60W2530/00B60W2552/15B60L2240/423B60L2240/642B60L2250/26Y02T90/16Y02T10/72B60K6/387B60W10/02B60W10/06B60W30/18063B60K2006/4825B60W2050/0008B60W2050/0012B60W2510/083B60W2510/1015B60W2530/10B60W2540/10B60W2540/12B60W2710/028B60W2710/0644B60W2710/081B60W20/12B60L15/2063Y02T10/62Y02T10/64
Inventor 马克·史蒂文·山崎于海拉吉特·乔瑞梁伟
Owner FORD GLOBAL TECH LLC