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 leerer Fragebogen

Derivable Solutions#

Faults
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Flat battery
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Clogged air filter
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Leaking air intake system
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Bad ignition timing
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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.

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This page (revision-13) was last changed on 09-Aug-2017 14:12 by Jochen Reutelshöfer