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Adjusting the specificity of an engine map based on the sensitivity of an engine control parameter relative to a performance variable

Patent ·
OSTI ID:1162104
; ; ;
Methods and systems for engine control optimization are provided. A first and a second operating condition of a vehicle engine are detected. An initial value is identified for a first and a second engine control parameter corresponding to a combination of the detected operating conditions according to a first and a second engine map look-up table. The initial values for the engine control parameters are adjusted based on a detected engine performance variable to cause the engine performance variable to approach a target value. A first and a second sensitivity of the engine performance variable are determined in response to changes in the engine control parameters. The first engine map look-up table is adjusted when the first sensitivity is greater than a threshold, and the second engine map look-up table is adjusted when the second sensitivity is greater than a threshold.
Research Organization:
Robert Bosch GmbH, Stuttgart, DE (Germany)
Sponsoring Organization:
USDOE
DOE Contract Number:
FC26-07NT43274
Assignee:
Robert Bosch GmbH (Stuttgart, DE)
Patent Number(s):
8,874,351
Application Number:
13/435,535
OSTI ID:
1162104
Country of Publication:
United States
Language:
English

References (2)

Self-optimising control of an SI-engine using a torque sensor journal May 2008
Extremum seeking methods for optimization of variable cam timing engine operation journal May 2006

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