METHODS AND SYSTEMS FOR CONDITIONALLY ENTERING A DRIVELINE SAILING MODE
First Claim
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1. A driveline operating method, comprising:
- providing torque to a driveline coupled to vehicle wheels via an engine and a driveline integrated starter/generator (DISG);
entering a sailing mode during select conditions, the sailing mode including providing DISG torque to the driveline and idling the engine without providing engine torque to the driveline; and
adjusting a driveline disconnect clutch responsive to the sailing mode.
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Abstract
Systems and methods for improving operation of a hybrid vehicle are presented. In one example, a driveline may selectively enter a sailing mode to provide quick driveline torque response with reduced impact on fuel economy.
1 Citation
20 Claims
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1. A driveline operating method, comprising:
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providing torque to a driveline coupled to vehicle wheels via an engine and a driveline integrated starter/generator (DISG); entering a sailing mode during select conditions, the sailing mode including providing DISG torque to the driveline and idling the engine without providing engine torque to the driveline; and adjusting a driveline disconnect clutch responsive to the sailing mode. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A driveline operating method, comprising:
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providing torque to a driveline coupled to vehicle wheels via an engine and a driveline integrated starter/generator (DISG); entering a sailing mode during select conditions, the sailing mode including providing DISG torque to the driveline and idling the engine without providing engine torque to the driveline; advancing spark timing and reducing an engine air amount in response to entering the sailing mode; and during hill holding operation, tying up a transmission output of the vehicle. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A vehicle system, comprising:
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a direct injection 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 enter a sailing mode during select conditions with the disconnect open, where the engine is operated at a sailing mode idle speed without providing engine torque to the transmission and where DISG torque is provided to the transmission, where the select conditions include battery state of charge being equal or greater than a threshold battery charge. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification