Back to results
US 10,337,444 B2Granted
System and method for controlling fuel for reactivating engine cylinders
AssigneeFord Global Technologies, LLC
InventorsAdam J. Richards, John Eric Rollinger
Life of this patent
Estimating the term…
Abstract
Systems and methods for operating an engine with deactivating and non-deactivating valves are presented. In one example, fuel supplied to cylinders being reactivated is supplied by direct fuel injectors even though the engine is operating in a region (e.g., speed and torque) where under conditions where cylinders are not being reactivated the engine injects fuel solely via port fuel injectors.
Claims14
An engine operating method, comprising:
- directly injecting fuel to a first cylinder for a first combustion event in the first cylinder after the first cylinder is deactivated during a cycle of an engine via ceasing combustion in the first cylinder, the engine continuing to rotate without stopping an entire time while the first cylinder is deactivated;
- port injecting fuel to the first cylinder a first time after the first cylinder is deactivated for a second combustion event in the first cylinder after the first cylinder is deactivated;
- and
- port injecting fuel to a second cylinder for a first combustion event in the second cylinder after the first cylinder and the second cylinder are deactivated during the cycle of the engine.
1 more element
A method for operating an engine, comprising:
- in response to a rate of an increasing driver demand torque exceeding a threshold, directly injecting fuel to a cylinder for a first combustion event in the cylinder after the cylinder is deactivated via ceasing combustion in the cylinder, the engine continuing to rotate without stopping an entire time while the cylinder is deactivated;
- and
- in response to the rate of the increasing driver demand torque being less than the threshold, port injecting fuel to a second cylinder for a first combustion event in the second cylinder after the second cylinder is deactivated via ceasing combustion in the second cylinder, the engine continuing to rotate without stopping an entire time while the second cylinder is deactivated.
Dependencies are inferred from the claim text.