Engine power elevation and active battery charge energy management strategies for plug-in hybrid electric vehicles
First Claim
1. A method for a vehicle having an engine and a battery configured to respectively deliver engine power and battery power to provide a total output power for powering the vehicle, wherein engine power up to a threshold amount without battery power may be delivered in an initial total output power range and at least the threshold amount of engine power with battery power may be delivered in the remaining total output power range, the method comprising:
- in response to a driver demand power in which the sum of the magnitudes of the driver demand power and vehicle powering losses falls within the initial total output power range, obtaining a state-of-charge (SOC) set-point of the battery from a battery charge depletion profile indicative of expected battery power consumption with respect to travel distance of the vehicle and generating an elevated engine power that is greater than the sum of the magnitudes of the driver demand power and vehicle powering losses, is less than the threshold amount of engine power, and is a function of a difference between the SOC of the battery and the SOC set-point at the time of the driver demand power; and
controlling the engine to deliver the elevated engine power in response to the driver demand power.
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Accused Products
Abstract
A method for a plug-in hybrid electric vehicle (PHEV) having an engine and a battery configured to respectively deliver engine power and battery power to provide a total output power for powering the vehicle includes the following. An elevated engine power which falls within a total output power range where only engine power without battery power may be delivered to power the vehicle in response to a driver demand power and which is greater than the combination of the driver demand power and vehicle powering losses is determined. The engine delivers the elevated engine power in response to the driver demand power. The extra engine power is transferred to the battery for the battery to buffer.
37 Citations
17 Claims
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1. A method for a vehicle having an engine and a battery configured to respectively deliver engine power and battery power to provide a total output power for powering the vehicle, wherein engine power up to a threshold amount without battery power may be delivered in an initial total output power range and at least the threshold amount of engine power with battery power may be delivered in the remaining total output power range, the method comprising:
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in response to a driver demand power in which the sum of the magnitudes of the driver demand power and vehicle powering losses falls within the initial total output power range, obtaining a state-of-charge (SOC) set-point of the battery from a battery charge depletion profile indicative of expected battery power consumption with respect to travel distance of the vehicle and generating an elevated engine power that is greater than the sum of the magnitudes of the driver demand power and vehicle powering losses, is less than the threshold amount of engine power, and is a function of a difference between the SOC of the battery and the SOC set-point at the time of the driver demand power; and controlling the engine to deliver the elevated engine power in response to the driver demand power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for a vehicle having an engine and a battery configured to respectively deliver engine power and battery power to provide a total output power for powering the vehicle, wherein engine power up to a threshold amount without battery power may be delivered in an initial total output power range and at least the threshold amount of engine power with battery power may be delivered in the remaining total output power range, the system comprising:
a controller configured to in response to a driver demand power in which the sum of the magnitudes of the driver demand power and vehicle powering losses falls within the initial total output power range, obtain a state-of-charge (SOC) set-point of the battery from a battery charge depletion profile indicative of expected battery power consumption with respect to travel distance of the vehicle and generate an elevated engine power that is greater than the sum of the magnitudes of the driver demand power and vehicle powering losses, is less than the threshold amount of engine power, and is a function of a difference between the SOC of the battery and the SOC set-point at the time of the driver demand power, the controller further configured to control the engine to deliver the elevated engine power in response to the driver demand power. - View Dependent Claims (12, 13, 14, 15, 16, 17)
Specification