Method for identifying defects or failure in a fuel supply unit in a supply module with two or more fuel supply units uses a controller to scan continuously for a lambda signal by using a lambda probe

摘要

A controller (12) continuously scans for a lambda signal by using a lambda probe (21). Using a detected lambda signal restricts maximum fuel injection amounts to the supply amount for a fuel supply unit (25,32). Amounts of air are restricted to an amount of air corresponding to the maximum fuel injection amount.