Back to results
US 2013/0152584 A1Published application
Method for reducing sensitivity for engine scavenging
AssigneeFord Global Technologies, LLC
InventorsMrdjan J. Jankovic, Amey Y. Karnik
Life of this patent
Estimating the term…
Abstract
A method for correcting a total cylinder air flow during scavenging by way of an oxygen sensor is disclosed. Additionally, cylinder trapped air amount and cylinder scavenging air amount are adjusted based on the corrected total cylinder air flow. The approach may reduce sensitivity between cylinder air flow estimates and fuel supplied for combustion.
Claims20
A method for operating an engine, comprising:
- adjusting a first actuator in response to an cylinder scavenging air amount, the cylinder scavenging air amount corrected via an oxygen sensor;
- and
- adjusting a second actuator in response to a cylinder trapped air amount, the cylinder trapped air amount corrected via the oxygen sensor apart from the cylinder scavenging air amount.
A method for operating an engine, comprising:
- adjusting fuel injection timing in response to a corrected total cylinder air amount flowing through a cylinder during a cycle of a cylinder;
- adjusting a cylinder trapped air amount based on the corrected total cylinder air amount flowing through the cylinder;
- adjusting a cylinder scavenged air amount based on the corrected total cylinder air amount flowing through the cylinder;
- and
- adjusting a first actuator in response to the cylinder trapped air amount.
2 more elements
A engine operating system, comprising:
- an engine;
- an actuator in communication with the engine;
- a turbocharger coupled to the engine;
- an exhaust system coupled to the turbocharger, the exhaust system including an oxygen sensor;
- a controller including instructions for adjusting a total cylinder air amount in response to an output of the oxygen sensor, the controller including additional instructions for providing a corrected cylinder trapped air amount and a corrected cylinder scavenging air amount based on the total cylinder air amount.
2 more elements
Dependencies are inferred from the claim text.