Back to results
US 9,752,520 B2Granted
Gaseous fuel injector activation
AssigneeFord Global Technologies, LLC
InventorsRoss Dykstra Pursifull, Samuel Guido, Ed Badillo
Life of this patent
Estimating the term…
Abstract
A method for starting an engine is provided. The method comprises in response to an engine start request, cycling a gaseous fuel injector prior to activating a starter motor. In this way, delayed engine starts using gaseous fuel may be mitigated.
Claims10
A method comprising:
- during running conditions of an engine, in response to a request to activate gaseous fuel injection, delaying activation of the gaseous fuel injection until an intake manifold pressure of an intake manifold through which intake air flows is determined to reach a threshold, and then activating gaseous fuel injection when intake manifold pressure reaches the threshold;
- and
- in response to gaseous fuel rail pressure above a threshold, closing a wastegate valve of a turbocharger to bring intake manifold pressure to the threshold.
A method, comprising:
- during running conditions of an engine, in response to a request to activate gaseous fuel injection, delaying activation of the gaseous fuel injection until an intake manifold pressure of an intake manifold through which intake air flows is determined to reach a threshold, then activating gaseous fuel injection when intake manifold pressure reaches the threshold;
- and
- deactivating liquid fuel injection responsive to the request to activate gaseous fuel injection, wherein the engine is turbocharged, wherein delaying activation until the intake manifold pressure is determined to reach the threshold includes delaying activation until the engine is operated under boosted conditions where intake manifold pressure is equal to or greater than barometric pressure.
Dependencies are inferred from the claim text.