Method and apparatus for managing charge depletion in a plug-in hybrid vehicle
US-9499040-B2 · Nov 22, 2016 · US
Method for increasing electric operation in hybrid electric vehicles
US2016304086A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016304086-A1 |
| Application number | US-201514685659-A |
| Country | US |
| Kind code | A1 |
| Filing date | Apr 14, 2015 |
| Priority date | Apr 14, 2015 |
| Publication date | Oct 20, 2016 |
| Grant date | — |
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Abstract
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A hybrid electric vehicle includes an internal combustion engine configured to provide power to traction wheels, and a controller. The controller is configured to, in response to the engine being off and a power request exceeding an engine-start threshold, delay an engine start when vehicle speed is below a predetermined value. Delaying an engine start may include providing an engine-start-threshold offset. The offset decreases as vehicle speed increases. The engine is started when the power request exceeds a sum of the engine-start threshold and the engine-start-threshold offset.
First claim
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What is claimed is: 1 . A hybrid electric vehicle comprising: an internal combustion engine configured to provide power to traction wheels; and a controller configured to, in response to the engine being off and a power request exceeding an engine-start threshold, delay an engine start when vehicle speed is below a predetermined value. 2 . The vehicle of claim 1 , wherein delaying an engine start comprises providing an engine-start-threshold offset, the offset decreasing as vehicle speed increases, and starting the engine when the power request exceeds a sum of the engine-start threshold and the engine-start-threshold offset. 3 . The vehicle of claim 2 , wherein the engine-start-threshold offset has a maximum value based on a battery-discharge limit. 4 . The vehicle of claim 2 , wherein the engine-start-threshold offset is based on the vehicle speed and the engine-start threshold. 5 . The vehicle of claim 4 , wherein the engine-start-threshold offset is obtained from a lookup table. 6 . The vehicle of claim 1 , wherein the controller is configured to delay the engine start in response to the engine being off, the power request exceeding the engine-start threshold, and a battery state of charge (SOC) exceeding an SOC threshold. 7 . A method of controlling a hybrid electric vehicle having an internal combustion engine, the method comprising: in response to the engine being off, a first driver power request exceeding an engine-start threshold and current vehicle speed being above a predetermined value, starting the engine; and in response to the engine being off, a second driver power request exceeding the engine-start threshold and current vehicle speed being below the predetermined value, delaying an engine start event. 8 . The method of claim 7 , wherein delaying an engine start event comprises providing an engine-start-threshold offset, the offset decreasing as vehicle speed increases, and starting the engine when the power request exceeds a sum of the engine-start threshold and the engine-start-threshold offset. 9 . The method of claim 8 , wherein the engine-start-threshold offset has a maximum value based on a battery-discharge limit. 10 . The method of claim 8 , wherein the engine-start-threshold offset is based on the current vehicle speed and the engine-start threshold. 11 . The method of claim 10 , wherein the engine-start-threshold offset is obtained from a lookup table. 12 . The method of claim 7 , further comprising in response to the engine being off, a second driver power request exceeding the engine-start threshold, current vehicle speed being below the predetermined value, and a battery state of charge being below a calibratable threshold, starting the engine. 13 . A hybrid electric vehicle comprising: traction wheels; an electric machine configured to provide power to the traction wheels; an internal combustion engine configured to provide power to the traction wheels; and a controller configured to coordinate the electric machine and internal combustion engine to satisfy a driver power request, wherein in response to a driver power request exceeding an engine-start threshold when the engine is off and the vehicle speed being below a predetermined value, the controller delays an engine start event. 14 . The hybrid electric vehicle of claim 13 , wherein delaying an engine start event comprises providing an engine-start-threshold offset, the offset decreasing as vehicle speed increases, and starting the engine when the power request exceeds a sum of the engine-start threshold and the engine-start-threshold offset. 15 . The hybrid electric vehicle of claim 14 , wherein the engine-start-threshold offset has a maximum value based on a battery-discharge limit. 16 . The hybrid electric vehicle of claim 14 , wherein the engine-start-threshold offset is based on the vehicle speed and the engine-start threshold.
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- What does patent US2016304086A1 cover?
- A hybrid electric vehicle includes an internal combustion engine configured to provide power to traction wheels, and a controller. The controller is configured to, in response to the engine being off and a power request exceeding an engine-start threshold, delay an engine start when vehicle speed is below a predetermined value. Delaying an engine start may include providing an engine-start-thre…
- Who is the assignee on this patent?
- Ford Global Tech Llc
- What technology area does this patent fall under?
- Primary CPC classification B60W10/06. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Oct 20 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).