Engine autostop and autorestart control
AssigneeFord Global Technologies, LLC
InventorMathew Alan Boesch
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Abstract
Systems and methods are described for controlling engine operation of an engine that may be shut-down during engine idle stop conditions. The engine may include a high pressure direct injection fuel system. In one embodiment, a method comprises during at least a first fuel rail temperature below a threshold, automatically stopping engine operation during a selected engine idle stop condition; and during at least a second fuel rail temperature above the threshold, maintaining engine operation during the selected engine idle stop condition.
Claims4
A method of controlling engine operation of an engine that may be shut-down during engine idle stop conditions, the engine including a high pressure direct injection fuel system, the method comprising:
- during at least a first fuel rail temperature below a threshold, automatically stopping engine operation during a selected engine idle stop condition without a driver requesting engine shut-down and restarting the engine at a first engine output torque amount;
- and
- during at least a second fuel rail temperature above the threshold, automatically stopping engine operation during the selected engine idle stop condition without the driver requesting engine shut-down and restarting the engine at a second engine output torque amount greater than the first engine output torque amount.
Dependencies are inferred from the claim text.