초록 ▼

A diagnostic and control system first checks the current operation status of the vehicle engine, when a malfunction or abnormal condition is detected by diagnostic sensors. A selection of optimum corrective measures is then made and carried out taking into account the safety of the vehicle, based on

A diagnostic and control system first checks the current operation status of the vehicle engine, when a malfunction or abnormal condition is detected by diagnostic sensors. A selection of optimum corrective measures is then made and carried out taking into account the safety of the vehicle, based on current operational status of the engine. For this purpose, a set of prioritized corrective measures is determined beforehand for each of the individual monitored items, according to detected changes in the engine operating status. The individual control measures are selected considering the safety of the vehicle, possible measures to correct the malfunction, assuring vehicle operability, and maintaining appropriate engine operating parameters such as exhaust gas mixture, fuel consumption and the like.

대표청구항 ▼

[ We claim:] [1.] Method of controlling operation of a vehicle having an internal combustion engine and a plurality of subsystems, said method comprising the steps of:providing a predetermined set of prioritized counter-measures for remedying predetermined malfunctions of each of said subsystems, an

[ We claim:] [1.] Method of controlling operation of a vehicle having an internal combustion engine and a plurality of subsystems, said method comprising the steps of:providing a predetermined set of prioritized counter-measures for remedying predetermined malfunctions of each of said subsystems, and storing said prioritized counter-measures in a memory;sensing operating parameters of each of said subsystems and providing output signals indicative thereof;processing said output signals in a data processor to detect a malfunction at least one of said subsystems;selecting a sequence of prioritized counter-measures depending on the detected malfunction and on the sensed operating parameters;sequentially implementing said prioritized counter-measures to modify operation of said system in response to control signals from said data processor; andtesting said at least one of said subsystems by sensing said operating parameters thereof in response to control signals from said data processor after implementation of each of said counter-measures, to determine effect of said counter-measures;wherein said selected sequence of corrective measures includes alternative corrective measures for differing operating conditions of said subsystems, and wherein said step of sequentially implementing said corrective measures includes selection of alternative corrective measures in response to changes in operating status of said subsystems sensed in said testing step.