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US 11,897,476 B1Granted
System and method for close-in-bore learning for a hybrid vehicle
AssigneeFord Global Technologies, LLC
InventorsJustin Panhans, Minku Lee, Fazal U. Syed, Alec Bolthouse, Francis Thomas Connolly, Josh Holland
Life of this patent
Estimating the term…
Abstract
Systems and methods for performing closed-in-bore diagnostics for a hybrid vehicle are presented. In one example, select operating conditions may be evaluated before closed-in-bore diagnostics may be initiated. In addition, charging of one or more batteries may be reduced to ensure that an engine throttle may operate with a small opening amount to evaluate the presence or absence of sludge in the engine throttle.
Claims20
A method for operating a vehicle, comprising:
- via one or more controllers, initiating a closed-in-bore diagnostic in response to a driveline disconnect clutch being fully closed, a vehicle speed being less than a threshold speed, a driver demand torque plus an accessory load torque being less than a first threshold torque, and a requested engine reserve torque being less than a second threshold torque.
A system, comprising:
- an internal combustion engine;
- an integrated starter/generator;
- a disconnect clutch positioned in a driveline between the internal combustion engine and the integrated starter/generator;
- a transmission included in the driveline;
- a low voltage battery;
- a traction battery;
- and
- a controller including executable instructions stored in non-transitory memory that cause the controller to begin a closed-in-bore diagnostic and reduce charging of the low voltage battery in response to a vehicle speed being less than a threshold speed, a driver demand torque plus an accessory load torque being less than a first threshold torque, and a requested engine reserve torque being less than a second threshold torque.
5 more elements
A method for operating a vehicle, comprising:
- via one or more controllers, initiating a closed-in-bore diagnostic in response to a driveline disconnect clutch being fully closed, a vehicle speed being less than a threshold speed, a driver demand torque plus an accessory load torque being less than a first threshold torque, and a requested engine reserve torque being less than a second threshold torque;
- and
- reducing charging of one or more batteries during the closed-in-bore diagnostic.
Dependencies are inferred from the claim text.