Quan Zheng from Dearborn, MI

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Location:

Gteborg Area, Sweden

Industry:

Automotive

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Method For Real-Time Learning Of Actuator Transfer Characteristics
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US Patent:

8170761, May 1, 2012
Filed:

Mar 3, 2008
Appl. No.:

12/041219
Inventors:

Jeremy J. Kraenzlein - Northville MI, US
Quan Zheng - Ann Arbor MI, US
Assignee:

Delphi Technologies, Inc. - Troy MI
International Classification:

G06F 19/00
US Classification:

701 59, 701 58
Abstract:

In a pressure control system having a solenoid-operated fluid valve that has an output hydraulic pressure which varies in accordance with a solenoid input signal, a dynamic learning block is configured to adjust the initial, default values for control points stored in a pressure-current (P-I) data table based on observed (measured) operating points that reflect the solenoid's actual transfer characteristic. A feed forward control block is configured to generate the solenoid input signal having a level based on the adjusted control points in the data table, which improves the accuracy of the solenoid input signal. An adjustment method uses a plurality of circular buffers each configured to store observed operating points falling within a respective range, and provides a mechanism to allow adjustment of the control points based on only partial data.