Battery state of charge control using route preview data
First Claim
1. A vehicle comprising:
- a navigation system configured to provide predicted speed and grade profiles;
a traction battery;
an engine; and
a controller programmed to (i) generate engine commands including engine off requests and commands permissive of engine off requests, and, in response to a first engine cycling command based on the profiles being an engine off request and a second engine cycling command derived independent of the profiles being permissive of engine off requests while the engine is on, cause the engine to transition to off and (ii) generate a target state of charge for the traction battery based on the profiles and a base battery power reference independent of the profiles, and, in response to the first engine cycling command defining at least a predetermined number of engine cycles over a route, charge and discharge the traction battery based on the target state of charge and the base battery power reference.
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Accused Products
Abstract
A vehicle includes an engine and at least one controller. A first engine cycling command based on route information and a second engine cycling command independent of route information are generated. The engine transitions state according to the first engine cycling command when the second engine cycling command permits the transition. When a first engine cycling profile based on route information includes at least a number of engine cycles, the engine is cycled according to the first engine cycling profile, otherwise, the engine is cycled according to an engine cycling state derived independent of route information. The vehicle includes a traction battery. A state of charge of the traction battery is controlled according to a target state of charge that is derived using route information and a base battery power reference that is independent of route information.
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Citations
18 Claims
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1. A vehicle comprising:
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a navigation system configured to provide predicted speed and grade profiles; a traction battery; an engine; and a controller programmed to (i) generate engine commands including engine off requests and commands permissive of engine off requests, and, in response to a first engine cycling command based on the profiles being an engine off request and a second engine cycling command derived independent of the profiles being permissive of engine off requests while the engine is on, cause the engine to transition to off and (ii) generate a target state of charge for the traction battery based on the profiles and a base battery power reference independent of the profiles, and, in response to the first engine cycling command defining at least a predetermined number of engine cycles over a route, charge and discharge the traction battery based on the target state of charge and the base battery power reference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A vehicle comprising:
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an engine; and a controller programmed to receive a predicted power demand profile from a navigation system and, in response to generating an engine cycling profile from the predicted power demand profile having a number of engine on/off cycles greater than a predetermined number, cycle the engine according to the engine cycling profile, and otherwise, cycle the engine according to an engine cycling state derived from a present driver power demand. - View Dependent Claims (10, 11, 12, 13)
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14. A method comprising:
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receiving, by a controller, predicted speed and grade profiles from a navigation system; receiving, by the controller, engine cycling commands including engine off requests and commands permissive of engine off requests; stopping, by the controller, an engine in response to a first engine cycling command that is based on the profiles being an engine off request and a second engine cycling command that is independent of the profiles being permissive of the engine off request while the engine is on; and outputting, by the controller, a target state of charge for a traction battery based on the profiles and a battery power reference independent of the profiles, and charging and discharging the traction battery according to the target state of charge in response to the first engine cycling command defining at least a predetermined number of engine cycles over a route. - View Dependent Claims (15, 16, 17, 18)
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Specification