Title:
EXHAUST GAS CONTROL IN AN ENGINE HAVING A TWO-STAGE TURBOCHARGER
Document Type and Number:
WIPO Patent Application WO2005042933
Kind Code:
A8
Abstract:
A control system (58) for controlling the extent to which a valve (50) selectively bypasses exhaust flow around one of two turbines (18T, 20T) in an engine exhaust system (14). A desired set-point (TCBC_DES) and the actual set-point (EBP_KPG) of operation of the valve are used to develop a set-point error (TCBC_ERR) for closed-loop control of the actual set-point (EBP_KPG). A data value for closed-loop gain (KP, KI) is selected from a schedule (164, 166) based on engine speed (N) and fueling (MFDES). The selected data values of closed-loop gain (KP, KI) and the set-point error data value (TCBC_ERR) are used to create a data value for a closed-loop output (TCBC_DTY_P, TCBC_DTY_I) that is used along with a feed forward parameter (TCBC_DTY_FF) to create a data value for a final output (TCBC_DTY_PIF) for forcing the actual set-point (EBP_KPG) to the desired set-point (TCBC_DES).
Inventors:
RODRIGUEZ ROGELIO (US)
SOUPOS ELIAS P (US)
BALEKAI PRIYANKAR S (US)
SOUPOS ELIAS P (US)
BALEKAI PRIYANKAR S (US)
Application Number:
PCT/US2004/031646
Publication Date:
January 05, 2006
Filing Date:
September 28, 2004
Export Citation:
Assignee:
INT ENGINE INTELLECTUAL PROP (US)
RODRIGUEZ ROGELIO (US)
SOUPOS ELIAS P (US)
BALEKAI PRIYANKAR S (US)
RODRIGUEZ ROGELIO (US)
SOUPOS ELIAS P (US)
BALEKAI PRIYANKAR S (US)
International Classes:
F02B37/013; F02B37/18; F02D23/00; F02D41/00; F02D41/14; F02M25/07; (IPC1-7): F02D23/00
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