Method and system for engine control
AssigneeFord Global Technologies, LLC
InventorsAlex O'Connor Gibson, Chad Everette Griffin, Felix Nedorezov
Life of this patent
Estimating the term…
Abstract
Systems and methods are provided for restarting an engine that can be selectively deactivated during idle-stop conditions. In one embodiment, current is directed to a starter motor and an electric brake sequentially by limiting the current supplied to one while current is supplied to the other, an order of delivering the current based on a timing of a restart request relative to an electric brake request, as well as vehicle operating conditions at the time the requests were received. By coordinating the operation of a starter motor with the operation of an electric brake, loading of the engine system's electrical supply can be reduced.
Claims13
A method of operating an engine, comprising:
- during an engine restart, cranking an engine via a starter while limiting current supplied to an electrically-actuated parking brake;
- and
- in a first mode, releasing elements of a transmission that rotate from being grounded to a transmission case in response to the electrically-actuated parking brake being applied during the restart.
A vehicle system, comprising:
- an engine coupled to a transmission;
- a battery;
- a wheel brake coupled to vehicle wheels, the wheel brake actuated via a brake pedal;
- an electrically-actuated parking brake coupled to vehicle wheels, the electrically-actuated parking brake operated in response to a current received from the battery;
- a starter motor operated in response to a current received from the battery;
- and a control system with computer readable instructions for:
- in response to releasing the wheel brakes while an electrically-actuated parking brake is applied, supplying current to the starter motor and limiting current supplied to the electrically-actuated parking brake;
- and
- assigning priority to supply the starter motor current if a request to supply current to the electrically-actuated parking brake is received after a request to supply current to the starter motor.
Dependencies are inferred from the claim text.