Terminology of the car faults diagnosis knowledge base.

Questions / User Inputs#

General #1 - Make of car [oc] -- VW -- Opel -- Mercedes Benz -- BMW -- Porsche -- Fiat -- Toyota -- Mazda -- Other - Year of construction [num] Observations #2 - Exhaust fumes [oc] -- black -- blue -- invisible - Exhaust pipe color [oc] -- brown -- grey -- light grey -- sooty black -- Exhaust pipe color evaluation [oc] <abstract> --- abnormal --- normal - Fuel [oc] -- diesel -- unleaded gasoline - "Average mileage /100km" [num] -- "Num. Mileage evaluation" [num] <abstract> --- Mileage evaluation [oc] <abstract> ---- slightly increased ---- normal ---- increased - "Real mileage /100km" [num] - Engine noises [oc] -- knocking -- ringing -- "no /else" - Engine start [oc] -- engine barely starts -- engine starts -- does not start - Starter [oc] -- does not turn over -- turns over - Driving [mc] -- insufficient power on partial load -- insufficient power on full load -- unsteady idle speed -- low idle speed -- "delayed take-off" -- weak acceleration -- "no /else" Technical Examinations - "Check: Idle speed system." [oc] -- ok -- not ok - "Check: Air intake system." [oc] -- ok -- not ok - "Check: Air filter." [oc] -- ok -- not ok - "Check: Ignition timing." [oc] -- ok -- not ok - "Check: Battery." [oc] -- ok -- not ok

Derivable Solutions#

Faults
-
Flat battery
-
Clogged air filter
-
Leaking air intake system
-
Bad ignition timing
-
Damaged idle speed system

General Abstraction Rules#

// The evaluation of the exhaust pipe color depends on the type of fuel:
IF (
Fuel
=
unleaded gasoline
AND
Exhaust pipe color
=
sooty black
)
THEN
Exhaust pipe color evaluation
=
abnormal
IF (
Fuel
=
diesel
AND
Exhaust pipe color
=
sooty black
)
THEN
Exhaust pipe color evaluation
=
normal
IF (
Exhaust pipe color
=
brown
OR
Exhaust pipe color
=
grey
OR
Exhaust pipe color
=
light grey
)
THEN
Exhaust pipe color evaluation
=
normal
// Mileage is slightly increased when real mileage is between 110 and 130 percent of the average mileage:
IF (
"Num. Mileage evaluation"
>= 110
AND
"Num. Mileage evaluation"
<= 130
)
THEN
Mileage evaluation
=
slightly increased
// Mileage is definitely increased if the real mileage is more than 130 percent of the average mileage:
IF
"Num. Mileage evaluation"
> 130
THEN
Mileage evaluation
=
increased
// Mileage evaluation is normal when it is lower than 110 percent of average mileage:
IF
"Num. Mileage evaluation"
< 110
THEN
Mileage evaluation
=
normal
// Compute the percentage mileage increase from the real and the average mileage:
IF
"Average mileage /100km"
> 0
AND
"Real mileage /100km"
> 0
THEN
"Num. Mileage evaluation"
= ((
"Real mileage /100km"
/
"Average mileage /100km"
) * 100.0)
// Here the clarification questions for the particular solutions are indicated:
IF
Flat battery
= SUGGESTED
OR
Flat battery
= ESTABLISHED
THEN
Check: Battery.
IF
Clogged air filter
= SUGGESTED
OR
Clogged air filter
= ESTABLISHED
THEN
Check: Air filter.
IF
Leaking air intake system
= SUGGESTED
OR
Leaking air intake system
= ESTABLISHED
THEN
Check: Air intake system.
IF
Bad ignition timing
= SUGGESTED
OR
Bad ignition timing
= ESTABLISHED
THEN
Check: Ignition timing.
IF
Damaged idle speed system
= SUGGESTED
OR
Damaged idle speed system
= ESTABLISHED
THEN
Check: Idle speed system.