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Enhanced regenerative braking control method for brake booster pressure build-up delay compensation

A technology of regenerative braking and friction braking, applied in the direction of brake control system, brakes, brake components, etc., can solve the problem of increasing the delay of ramping up of friction braking

Inactive Publication Date: 2015-02-11
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Regenerative braking torque ramp-down delay can be used as a solution, i.e. to compensate for brake booster delay, but reporting delayed regenerative braking torque to the braking module may further increase friction braking ramp-up delay because Friction braking ramp-up is calculated in the braking module by subtracting the regenerative braking torque from the total driver braking request

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  • Enhanced regenerative braking control method for brake booster pressure build-up delay compensation
  • Enhanced regenerative braking control method for brake booster pressure build-up delay compensation
  • Enhanced regenerative braking control method for brake booster pressure build-up delay compensation

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Embodiment Construction

[0013] The following detailed description is merely exemplary in nature and is not intended to limit the described embodiments or the use and applications of the described embodiments. As used herein, the word "exemplary" or "illustrative" means "serving as an example, instance, or illustration." Implementations described in this application as "exemplary" or "illustrative" are not necessarily to be considered better or advantageous over other implementations. All the following embodiments are exemplary embodiments, which are provided for those skilled in the art to implement the content of the invention, and are not intended to limit the protection scope of the claims. Furthermore, the illustrative examples described are not exhaustive, and other examples or implementations are possible than those described and within the scope of the claims. Furthermore, there is no intention to be bound by any expressed or implied theory presented in the preceding technical field, backgrou...

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Abstract

A regenerative braking control method. An illustrative embodiment of the method includes selecting a vehicle speed at onset of transition from regenerative braking to friction braking of a vehicle, comparing the vehicle speed to a threshold value, applying a delayed regenerative braking torque ramp out to a hybrid powertrain and sending an undelayed regenerative braking torque ramp-out signal to a vehicle brake controller without at onset of transition from regenerative braking to friction braking of the vehicle if the vehicle speed falls below the threshold value.

Description

technical field [0001] Exemplary embodiments of the present invention generally relate to regenerative braking control methods. More specifically, exemplary embodiments of the present invention generally relate to improved regenerative braking control methods that eliminate or reduce jerky deceleration tendencies by compensating for brake booster torque boost delays. Background technique [0002] To improve fuel economy, hybrid electric vehicles (HEVs) may apply regenerative braking, in which an electric motor applies regenerative braking torque to the vehicle's drivetrain during driver-directed friction braking of the vehicle. The electric motor converts the kinetic energy developed into storable electrical energy that can then be used for vehicle propulsion. Regenerative braking is one of the enablers of hybrid vehicle technology. Application of regenerative braking has been found to achieve fuel economy improvements of 15% to 30% relative to non-regenerative braking veh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W10/18B60W10/00B60W20/00B60W40/105
CPCB60T1/10B60T8/72B60T2270/604
Inventor 凯雷姆·巴亚尔戴尔·斯科特·克劳姆贝兹金科·李约翰·菲利普·麦考米克
Owner FORD GLOBAL TECH LLC
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