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AssigneeRobert Bosch GmbH
InventorsCornelia Nagel, Alexander Franz, Tobias Pfister
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In a method for the diagnosis of an exhaust gas aftertreatment system for an internal combustion engine, the exhaust gas aftertreatment system comprises at least one NOx storage catalytic converter (10) and at least one SCR catalytic converter (30) which is arranged downstream of the NOx storage catalytic converter (10). According to the invention, a regeneration of the NOx storage catalytic converter (10) is blocked and/or interrupted in order to improve the frequency and/or quality of the diagnosis of the SCR catalytic converter (30).
A method for the diagnosis of an exhaust gas aftertreatment system for an internal combustion engine, the exhaust gas aftertreatment system having at least one NOx storage catalytic converter (10) and at least one SCR catalytic converter (30) which is arranged downstream of the NOx storage catalytic converter (10), that the method comprising at least temporarily blocking a regeneration of the NOx storage catalytic converter (10) to improve the frequency, the quality, or both of the diagnosis of the SCR catalytic converter (30).
A non-transitory computer-readable storage medium comprising instructions that when executed on a computer cause the computer to control an exhaust gas aftertreatment system for an internal combustion engine, the exhaust gas aftertreatment system having at least one NOx storage catalytic converter (10) and at least one SCR catalytic converter (30) which is arranged downstream of the NOx storage catalytic converter (10), by at least temporarily blocking a regeneration of the NOx storage catalytic converter (10) to improve the frequency, the quality, or both of the diagnosis of the SCR catalytic converter (30).
An electronic control unit configured to at least temporarily blocking a regeneration of the NOx storage catalytic converter (10) to improve the frequency, the quality, or both of the diagnosis of an SCR catalytic converter (30) of an exhaust gas aftertreatment system for an internal combustion engine, the exhaust gas aftertreatment system having at least one NOx storage catalytic converter (10), and wherein the SCR catalytic converter (30) which is arranged downstream of the NOx storage catalytic converter (10).
Dependencies are inferred from the claim text.