Operation Section
1
–
34
(3) Operational Outline
• Learning control sends ISC (target speed correction quantity) and FCCB (cylinder-to-cylinder correction quantity) feedback based on
engine speed to apply injection control. The correction quantity is added to each cylinder based on ISC and FCCB correction infor-
mation. The corrected injection quantity is then calculated.
Through the use of quantity learning control, injection is divided into 5 injections. In this state, the value for ISC and FCCB corrected
injection quantity that has been divided into five injections is calculated as the "learning value".
Q001250
Manual Learning Operations (as a Diagnostic Tool)
(A)
Number of IG OFF Occurrences
Vehicle Running Distance
Injection Quantity Deterioration Over Time Judgment
No Load Idle Instability Condition
Establishment of
Learning Operations
Q001251E
1st Cylinder
2nd Cylinder
3th Cylinder
4th Cylinder
1st Cylinder
2nd Cylinder
3th Cylinder
4th Cylinder
: ISC Correction Portion
ISC
Correction
Portion
: FCCB Correction Portion
FCCB
Correction
Portion
<Calculated Microinjection Quantity>
<When Performing Microinjection Quantity Learning>
Learning
Value
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