Method for diagnosis and/or adaptation of e.g. air systems in motor car, involves determining two state variables of systems, where decision for implementation of systems is made based on state variables

摘要

The method involves changing a control variable of systems (12, 14) in relation to an actual present value of the control variable. Two state variables of the systems are determined. A decision for implementation of the systems is made based on the state variables. A change of a diagnostic algorithm is determined based on the state variables. Alternative diagnostic algorithms are selected from a stored stock based on the determined state variables. The control variable comprises one of opening time of an injector and/or fuel pressure. The state variables are selected from one of a group consisting of sensor size, actuator size, offset-value, amplification factor, catalyst temperature and/or an oxygen level of a catalyzer. The control variable is selected from one of a group consisting of a lambda value of exhaust gas, size of an exhaust gas recirculation, firing angle, portion of oxygen, nitrogen, hydrogen, carbon monoxide and/or hydrocarbons in the exhaust gas, dosing rate of additives of the exhaust gas and/or an exhaust gas temperature. Independent claims are also included for the following: (1) a computer program comprising a set of instructions for performing a method for diagnosis and/or adaptation of systems in a motor car (2) a storage medium comprising a set of instructions for performing a method for diagnosis and/or adaptation of systems in a motor car (3) a control and/or regulating device for performing a method for diagnosis and/or adaptation of systems in a motor car.