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Hybrid vehicle control for traveling over a grade

A hybrid vehicle and vehicle technology, which is applied in the field of vehicle control, can solve problems such as drive train disturbances and failure to meet vehicle driving performance expectations, and achieve the effects of saving fuel, improving fuel efficiency, and reducing delays

Active Publication Date: 2015-04-29
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Delays associated with starting or restarting the engine or increasing engine speed during vehicle operation may create driveline disturbances or may not meet vehicle drivability expectations

Method used

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  • Hybrid vehicle control for traveling over a grade
  • Hybrid vehicle control for traveling over a grade
  • Hybrid vehicle control for traveling over a grade

Examples

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Embodiment Construction

[0021] As desired, various embodiments of the invention are disclosed in this specification; however, it is to be understood that the disclosed embodiments are merely examples 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.

[0022] figure 1 A schematic diagram of a hybrid vehicle 30 according to the embodiment is illustrated. Vehicle 30 includes engine 32 and electric machine, and this electric machine is in figure 1 In the embodiment shown in is a motor / generator (M / G) 34 and may alternatively be a traction motor. M / G 34 is configured to transmit torque to engine 32 or to wheels 36 .

[0023] The M / G 34 is coupled...

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Abstract

A method for controlling a hybrid vehicle having an engine includes automatically stopping the engine in response to vehicle power demand dropping below currently available electrical power, and automatically starting the engine when vehicle power demand is at a first offset below currently available electrical power to reduce a time delay for starting the engine and increase a currently available vehicle power to move the vehicle up a grade in response to receiving a signal indicating a positive grade. A hybrid vehicle includes an engine, an electric machine, and a controller. The controller is configured to control starting / stopping of the engine in response to a first driver demand when receiving a signal indicative of a road grade angle exceeding a corresponding threshold and in response to a second driver demand otherwise.

Description

technical field [0001] Various embodiments of the present invention relate to hybrid vehicles and the control of the vehicle when the vehicle is traveling on an incline. Background technique [0002] A hybrid vehicle may have first and second prime movers, such as an internal combustion engine and an electric machine. One of the prime movers or both running vehicles can be used simultaneously. Depending on the amount of electrical power available and the vehicle load including driver demand and other vehicle accessory loads, the vehicle can operate electrically. When the battery state of charge reaches a lower limit, the engine can be started to provide additional power to the vehicle. The engine may also be started when the power or torque demand of the vehicle exceeds the amount that can be drawn from the electric machine. [0003] When an additional external load is present on the vehicle, such as when the vehicle is driven on a hill, the resulting increased load on th...

Claims

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Application Information

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IPC IPC(8): B60W20/00B60W30/18
CPCB60W10/02B60W10/023B60W10/06B60W20/10B60W2710/0644B60W2710/021B60W2520/105B60W2552/15B60W10/026B60W10/08B60W2540/12B60W20/40Y10S903/93Y02T10/62B60W30/18009B60W40/076
Inventor 罗伯特·莱特杰弗里·艾伦·多林
Owner FORD GLOBAL TECH LLC
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