Engine oil dilution control in a hybrid vehicle
First Claim
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1. A vehicle comprising:
- an engine; and
a controller programmed to,responsive to an estimated oil dilution level of the engine exceeding a first threshold, issue commands such that regenerative braking is inhibited to increase a temperature of the engine, andresponsive to the estimated oil dilution level falling below the first threshold, discontinue issuing the commands.
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Abstract
A vehicle includes an engine and a controller programmed to, responsive to an estimated oil dilution level of the engine exceeding a first threshold, issue commands such that regenerative braking is inhibited to increase a temperature of the engine, and responsive to the estimated oil dilution level falling below the first threshold, discontinue issuing the commands.
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Citations
18 Claims
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1. A vehicle comprising:
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an engine; and a controller programmed to, responsive to an estimated oil dilution level of the engine exceeding a first threshold, issue commands such that regenerative braking is inhibited to increase a temperature of the engine, and responsive to the estimated oil dilution level falling below the first threshold, discontinue issuing the commands. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An engine oil dilution control method comprising:
by a controller, responsive to an estimated oil dilution level of an engine exceeding a first threshold, operating by the controller an electric heater configured to heat coolant for the engine to increase a temperature of the coolant until the estimated oil dilution level falls below the first threshold, and responsive to the estimated oil dilution level exceeding a second threshold less than the first threshold, increasing by the controller a target state-of-charge of a battery such that the engine operates to recharge the battery to the target state-of-charge until the estimated oil dilution level falls below the second threshold. - View Dependent Claims (8, 9, 10, 11)
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12. A vehicle comprising:
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an engine; and a controller programmed to, responsive to an estimated oil dilution level of the engine exceeding a first threshold, operate valves to direct coolant exiting the engine to bypass a radiator and recirculate the coolant through the engine to increase a temperature of the engine, responsive to the estimated oil dilution level falling below the first threshold, operate the valves to direct the coolant through the radiator, responsive to the estimated oil dilution level exceeding a second threshold less than the first threshold, issue an alert to not recharge a battery of the vehicle via an electrical power source external to the vehicle, and responsive to the estimated oil dilution level falling below the second threshold, discontinue issuing the alert. - View Dependent Claims (13, 14, 15, 16)
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17. A vehicle comprising:
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an engine; and a controller programmed to, responsive to an estimated oil dilution level of the engine exceeding a first threshold, issue commands such that interior cabin heating is inhibited to limit transfer of heat from a coolant of the engine until the estimated oil dilution level falls below the first threshold. - View Dependent Claims (18)
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Specification