Engine shut down using fluid pump to control crankshaft stopping position
AssigneeFord Global Technologies, LLC
InventorsPatrick Phlips, Bernd Steiner, Klemens Greiser, Ulrich Kramer, Markus Lemmen, Ulla Weimann Macdonald
Life of this patent
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Abstract
Systems and methods for controlling stopping position of a crankshaft during shutdown of an internal combustion engine control a fluid pressure to control a corresponding drive torque of a fluid pump. Kinetic energy of the engine at shutdown may be used to control fluid pressure in a power steering system or fuel injection system to stop the crankshaft in a position favorable for restarting.
Claims20
A method for controlling stopping position of a crankshaft in a multiple cylinder internal combustion engine having a crankshaft-driven fluid pump, the method comprising:
- changing pressure of the fluid to change drive torque of the fluid pump during engine shutdown so the crankshaft stops in a position favorable for restarting.
A method for controlled shutdown of an internal combustion engine equipped with a hydraulic power steering system having a hydraulic pump driven by the internal combustion engine to supply pressurized hydraulic fluid to the power steering system via a supply line connected to an outlet of the hydraulic pump, the method comprising:
- influencing drive torque of the hydraulic pump such that energy of the internal combustion engine after ignition and/or fuel is switched off is consumed by the drive torque in a controlled fashion to stop the crankshaft in a predetermined position.
A system for controlling stopping position of a crankshaft during shutdown of an internal combustion engine, the system comprising:
- a fluid pump driven by the crankshaft and supplying pressurized fluid to the engine;
- a device for controlling pressure of the fluid during engine shutdown to vary drive torque of the fluid pump and control the stopping position of the crankshaft.
Dependencies are inferred from the claim text.