Title:
CLOSED LOOP DIESEL ENGINE EGR CONTROL INCLUDING EVENT MONITORING
Document Type and Number:
WIPO Patent Application WO2001042639
Kind Code:
A3
Abstract:
A control system and method for an EGR valve (54), particularly in a diesel engine (30). A processor processes data in feedback control of the position of the valve element to develop from the data a position control signal for setting the extent to which the valve is open. The processing includes processing data (EGRP) corresponding to actual position of the valve and data (EGRP_DES) representing a desired position of the valve to develop a position error signal (EGRP_ERR), processing data (EGR_RATE_FDBK) that defines actual EGR rate and data (EGR_RATE_DES) representing a desired EGR rate to develop a rate error signal (EGR_RATE_ERR), and processing the position error signal (EGRP_ERR) and the rate error signal (EGR_RATE_ERR) to develop the position control signal (EGRP_DTY). Emission control system event monitors (200, 202) flag potential error sources in their incipiency to afford opportunity for correction before mandatory logging occurs.
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Inventors:
BALEKAI PRIYANKAR S
ANDERSON SCOTT
BANDY STEVEN M
ANDERSON SCOTT
BANDY STEVEN M
Application Number:
PCT/US2000/033142
Publication Date:
November 29, 2001
Filing Date:
December 08, 2000
Export Citation:
Assignee:
INT TRUCK & ENGINE CORP (US)
International Classes:
F02D21/08; F02D23/02; F02D41/00; F02D41/02; F02D41/14; F02D41/22; F02D45/00; F02M25/07; F02B3/06; F02B29/04; (IPC1-7): F02D21/08; F02D41/22
Foreign References:
| FR2753488A1 | 1998-03-20 | |||
| US4279235A | 1981-07-21 | |||
| DE4322319A1 | 1995-01-12 | |||
| EP0884466A1 | 1998-12-16 | |||
| US5823164A | 1998-10-20 | |||
| DE19607071A1 | 1997-08-28 |
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