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Deceleration control for a hybrid vehicle during towing

A technology for hybrid vehicles and vehicle control systems, which is applied to hybrid vehicles, road vehicle drive control systems, transmission control, etc., and can solve problems such as unpleasant handling performance

Active Publication Date: 2018-02-16
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, to some drivers or occupants, the resulting deceleration when the transmission downshifts as the vehicle decelerates to a stop can be perceived as an objectionable handling characteristic

Method used

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  • Deceleration control for a hybrid vehicle during towing
  • Deceleration control for a hybrid vehicle during towing
  • Deceleration control for a hybrid vehicle during towing

Examples

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Embodiment Construction

[0021] Embodiments of the present disclosure are described herein. It should be understood, however, that the disclosed embodiments are merely examples and that other embodiments may take 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. As will be understood by those of ordinary skill in the art, various features shown and described with reference to any one figure may be combined with features shown in one or more other figures to produce Examples shown or described. The combinations of features shown provide representative embodiments for typical applications. Various combinations and modifications of the features consistent with the teachi...

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PUM

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Abstract

The invention discloses deceleration control for a hybrid vehicle during towing. A hybrid vehicle having an engine, an electric machine, and a step-ratio transmission includes a controller programmedto, in response to an accelerator lift-pedal event when operating in a towing mode, learn a vehicle speed, and apply a lift-pedal torque when vehicle speed exceeds the learned vehicle speed, and applyan adjusted lift-pedal torque based on a gear ratio after downshifting the transmission to maintain a constant output shaft torque otherwise.

Description

technical field [0001] The present disclosure relates to hybrid vehicles and methods of controlling deceleration of hybrid vehicles during towing. Background technique [0002] Various types of vehicles may include a tow or tow / tow mode, which allows the vehicle to maintain speed when going downhill by using engine friction or engine braking to reduce the driver's need to apply the service brakes. The driver can activate this mode when the vehicle is towing cargo in hilly terrain. Traction mode attempts to maintain vehicle speed by gradually shifting into lower gears (higher gear ratios) as the vehicle accelerates downhill. This mode generally does not request vehicle control to increase acceleration if the vehicle is decelerating. [0003] For vehicles that include a transmission with a torque converter, if the vehicle is accelerating downhill, the torque converter bypass clutch is usually locked when downshifting to a lower gear to create more negative torque at the whee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W10/06B60W10/08B60W20/10B60W40/105
CPCB60W10/06B60W10/08B60W20/10B60W40/105B60W2710/083B60W2710/0666B60W2520/10B60Y2300/28B60W10/026B60W30/18072B60W2030/18081B60W2540/103B60W2720/10B60W20/15B60W2050/0088Y10S903/945Y02T10/62F16H61/21B60W20/30B60W30/18136B60W10/02B60W10/11B60W30/19B60W2540/106B60W2540/12B60W2710/105B60Y2300/188
Inventor 罗吉特·乔赫里杰弗里·艾伦·多林张臣
Owner FORD GLOBAL TECH LLC