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US 9,260,107 B2Granted
Methods and systems for operating a driveline disconnect clutch responsive to engine operating conditions
AssigneeFord Global Technologies, LLC
InventorsJeffrey Allen Doering, Alex O'Connor Gibson, Dennis Craig Reed, Gregory Michael Pietron, Seung-Hoon Lee
Life of this patent
Estimating the term…
Abstract
Systems and methods for improving operation of a hybrid vehicle are presented. In one example, a driveline disconnect clutch transfer function may be adapted in response to engine operating conditions during closing of the driveline disconnect clutch.
Claims20
A method, comprising:
- rotating an integrated starter/generator (ISG) at a first speed;
- operating an engine at a second different speed while operating the ISG at the first speed in response to conditions for adapting a transfer function stored in memory;
- revising the transfer function stored in memory while rotating the ISG at the first speed and the engine at the second speed in response to a difference between an engine torque estimate based on engine operating conditions and a torque estimate based on the transfer function;
- and
- operating a driveline disconnect clutch responsive to the transfer function.
2 more elements
A driveline disconnect clutch adaptation method, comprising:
- rotating an integrated starter/generator at a first speed;
- operating an engine at a second speed different from the first speed while rotating the integrated starter/generator at the first constant speed;
- storing an engine torque output value while a driveline disconnect clutch is open;
- incrementally closing the driveline disconnect clutch while rotating the engine at the second speed and the integrated starter/generator at the first speed;
- and
- revising a transfer function stored in memory based on rotating the integrated starter/generator at the first speed and the engine at the second speed in response to a difference between an engine torque estimate based on engine operating conditions and a torque estimate based on the transfer function;
- and
- operating the driveline disconnect clutch in response to the transfer function.
5 more elements
A vehicle system, comprising:
- an engine;
- a dual mass flywheel including a first side mechanically coupled to the engine;
- a driveline disconnect clutch mechanically including a first side coupled to a second side of the dual mass flywheel;
- a driveline integrated starter/generator (DISG) including a first side coupled to a second side of the driveline disconnect clutch;
- a transmission selectively coupled to the engine via the driveline disconnect clutch;
- and
- a controller including executable instructions stored in non-transitory memory to, during a first mode, adjust an estimate of torque transferred through the driveline disconnect clutch in response to an engine torque estimate, and operate the driveline disconnect clutch in response to the estimate of torque transferred through the driveline disconnect clutch;
- and
- during a second mode when the engine is not rotating and combusting, revising a transfer function stored in memory in response to incrementally closing the driveline disconnect clutch and rotating the DISG at a speed in a speed control mode and a difference between an engine torque estimate based on engine operating conditions and a torque estimate based on the transfer function.
6 more elements
Dependencies are inferred from the claim text.