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US 10,920,732 B1Granted
Methods and systems for engine start following idle-stop
AssigneeFord Global Technologies, LLC
InventorsDavid Andrew Ord, Brad Alan VanDerWege, Jeffrey Allen Doering, Joseph Lyle Thomas
Life of this patent
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Abstract
Methods and systems are provided for restarting an engine following an engine idle-stop. In one example, a method may include upon receiving an engine restart request during an engine idle-stop, initiating combustion in a selected cylinder and based on a predicted time of attainment of peak pressure in the cylinder, activating a starter motor.
Claims19
A method for an engine, comprising:
- prior to a first engine restart following an idle-stop, initiating combustion in a selected cylinder, and at a threshold pressure in the selected cylinder, engaging a starter device to crank the engine;
- and
- wherein the selected cylinder is selected based on a stop position of the engine, the selected cylinder stopped in a power stroke with each of an intake valve and an exhaust valve coupled to the cylinder in a closed position and wherein the combustion is initiated prior to the cranking of the engine.
A method for an engine, comprising:
- during an engine idle-stop, in response to an increase in engine torque demand,
- identifying a cylinder parked in a power stroke;
- initiating combustion in the identified cylinder;
- predicting a time of attainment of a threshold pressure in the identified cylinder;
- and
- engaging a starter motor to coordinate cranking of the engine with the time of attainment of the threshold pressure.
3 more elements
A system for an engine, comprising:
- a controller with computer readable instructions stored on non-transitory memory to:
- in response to an engine restart request following an engine idle-stop,
- inject fuel to a cylinder stopped with a piston in a top dead center (TDC) position of a power stroke within the cylinder;
- initiate spark in the cylinder to start combustion;
- and
- activate a starter motor to crank the engine in coordination with pressure from the combustion.
3 more elements
Dependencies are inferred from the claim text.