Method and device for operating an internal combustion engine
First Claim
1. A method for operating an internal combustion engine, which includes an induction tract and an exhaust gas tract, that communicate with the at least one combustion chamber of the internal combustion engine depending on the switching position of at least one gas inlet valve or at least one gas exhaust valve, the method comprising the steps:
- within a first driving cycle of the internal combustion engine, controlling a combustion process in the at least one combustion chamber for the purpose of checking an emission reduction system of the internal combustion engine,in a second driving cycle after the first driving cycle, checking as to whether an error of the emission reduction system was detected during the first driving cycle,determining an ignition off time of the internal combustion engine between the first and the second driving cycle if during the first driving cycle an error of the emission reduction system was detected,in the second driving cycle of the internal combustion engine, controlling the combustion process in the at least one combustion chamber only for the purpose of checking the emission reduction system if an error of the emission reduction system was detected during the first driving cycle and if the ignition off time was greater than a predetermined repair time.
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Accused Products
Abstract
During a first driving cycle, a combustion process is controlled in at least one combustion chamber for the purpose of performing a check on an emission reduction system of an internal combustion engine. During a second driving cycle following the first cycle, a check is performed to establish whether an error in the emission reduction system was detected during the first cycle. An idle time between the first and the second cycles is determined, in the event of an error of the emission reduction system detected during the first cycle. During the second cycle, the combustion process in the at least one combustion chamber is only controlled for the purpose of the check on the emission reduction system, in the event of an error detected in the emission reduction system during the first cycle and in the event of the idle time being longer than a pre-determined repair time.
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Citations
15 Claims
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1. A method for operating an internal combustion engine, which includes an induction tract and an exhaust gas tract, that communicate with the at least one combustion chamber of the internal combustion engine depending on the switching position of at least one gas inlet valve or at least one gas exhaust valve, the method comprising the steps:
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within a first driving cycle of the internal combustion engine, controlling a combustion process in the at least one combustion chamber for the purpose of checking an emission reduction system of the internal combustion engine, in a second driving cycle after the first driving cycle, checking as to whether an error of the emission reduction system was detected during the first driving cycle, determining an ignition off time of the internal combustion engine between the first and the second driving cycle if during the first driving cycle an error of the emission reduction system was detected, in the second driving cycle of the internal combustion engine, controlling the combustion process in the at least one combustion chamber only for the purpose of checking the emission reduction system if an error of the emission reduction system was detected during the first driving cycle and if the ignition off time was greater than a predetermined repair time. - View Dependent Claims (2, 3, 4, 5)
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6. A device for operating an internal combustion engine comprising an induction tract and an exhaust gas tract that communicate with the at least one combustion chamber of the internal combustion engine depending on the switching position of at least one gas inlet valve or at least one gas exhaust valve, with the device being operable to
control a combustion process in the at least one combustion chamber for the purposes of checking an emission reduction system of the internal combustion engine within a first driving cycle of the internal combustion engine, check in a second driving cycle after the first driving cycle whether an error of the emission reduction system was detected during the first driving cycle, determine an ignition off time of the internal combustion engine between the first and the second driving cycle, if an error of the emission reduction system was detected during the first driving cycle, and to control the combustion process in the at least one combustion chamber only for the purpose of checking the emission reduction system in the second driving cycle of the internal combustion engine, if during the first driving cycle an error of the emission reduction system was detected and if the ignition off time was greater than a predetermined repair time.
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11. A software product stored on a computer readable medium, wherein the software when executed on a processor performs a method for operating an internal combustion engine, which includes an induction tract and an exhaust gas tract, that communicate with the at least one combustion chamber of the internal combustion engine depending on the switching position of at least one gas inlet valve or at least one gas exhaust valve, the method comprising the steps of:
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within a first driving cycle of the internal combustion engine, controlling a combustion process in the at least one combustion chamber for the purpose of checking an emission reduction system of the internal combustion engine, in a second driving cycle after the first driving cycle, checking as to whether an error of the emission reduction system was detected during the first driving cycle, determining an ignition off time of the internal combustion engine between the first and the second driving cycle if during the first driving cycle an error of the emission reduction system was detected, in the second driving cycle of the internal combustion engine, controlling the combustion process in the at least one combustion chamber only for the purpose of checking the emission reduction system if an error of the emission reduction system was detected during the first driving cycle and if the ignition off time was greater than a predetermined repair time. - View Dependent Claims (12, 13, 14, 15)
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Specification