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US 2009/0013945 A1Published application
Control of turbocharger imbalance
AssigneeFord Global Technologies, LLC
InventorsJulia Helen Buckland, Mrdjan J. Jankovic
Life of this patent
Estimating the term…
Abstract
A method for controlling flow differences in a turbocharged internal combustion engine is presented. In one example, the description includes a method for adjusting valve timing to reduce flow variation between two compressors.
Claims22
A method for controlling an internal combustion engine, the method comprising:
- varying valve operation of at least a cylinder, said at least a cylinder in a first group of cylinders, as a rate that mass flows through a second compressor of a second turbocharger varies from a rate that mass flows through a first compressor of a first turbocharger, said first group of cylinders located upstream of a turbine of said first turbocharger.
A method for controlling an internal combustion engine, the method comprising:
- varying intake valve operation of at least a cylinder in a first group of cylinders and the position of a throttle plate located upstream of said first group of cylinders as a mass flow rate between said first turbocharger and a second turbocharger varies, said first group of cylinders located upstream of a turbine of said first turbocharger.
A method for controlling an internal combustion engine, the method comprising:
- varying valve operation of at least a cylinder in a first group of cylinders as a rate mass flows through a first turbocharger varies from a rate mass flows through a second turbocharger, said first group of cylinders in communication with the turbine of said first turbocharger;
- and
- varying valve operation of at least a cylinder in a second group of cylinders, different from said first group of cylinders, as a rate mass flows through a first turbocharger varies from a rate mass flows through a second turbocharger.
Dependencies are inferred from the claim text.