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AssigneeRobert Bosch GmbH
InventorsChristian Post, Andreas Nagel
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The invention relates to a method (61) for controlling a regeneration process of an exhaust gas particle filter (41) of an internal combustion engine (11), wherein said method (61) comprises safeguards (71) for protecting said exhaust gas particle filter (41) from overheating and when implementing said safeguards (71) a gas flow (ma) of the gas flowing through the exhaust gas particle filter (41) is reduced (71a, 71b) for the purpose of restricting a reaction rate of an exothermal reaction taking place in said exhaust gas particle filter (41) during the regeneration process. In order to allow for an efficient regeneration of an exhaust gas particle filter (41) and still avoid damage to or the destruction of said exhaust gas particle filter (41) as a result of the overheating thereof, the invention is characterized in that during the regeneration process an instantaneous value (x(t)), which characterizes an instantaneous mass (x) of the soot situated in the exhaust gas particle filter (41), is ascertained, a check (67) is made as a function of the instantaneous value (x(t)) to determine whether said exhaust gas particle filter (41) is in an uncritical operating state and said safeguards (71) are suppressed in the event that the uncritical operating state is present.
Method for controlling a regeneration process of an exhaust gas particle filter of an internal combustion engine, wherein said method comprises safeguards for protecting the exhaust gas particle filter from overheating and when implementing said safeguards a gas flow of gas flowing through the exhaust gas particle filter is reduced for the purpose of restricting a reaction rate of an exothermal reaction taking place in the exhaust gas particle filter during the regeneration process, wherein an instantaneous value, which characterizes an instantaneous mass of the soot situated in the exhaust gas particle filter, is ascertained during the regeneration process, a check is made as a function of said instantaneous value to determine whether the exhaust gas particle filter is in an uncritical operating state and said safeguards are suppressed in the event that said uncritical operating state is present.
Control unit for the open-loop and/or closed-loop control of an internal combustion engine, which has an exhaust gas system with an exhaust gas particle filter, said control unit being equipped for controlling a regeneration process of the exhaust gas particle filter such that it can implement safeguards for protecting said exhaust gas particle filter from overheating, a gas flow of gas flowing through said exhaust gas particle filter being reduced when implementing said safeguards for the purpose of restricting a reaction rate of an exothermal reaction taking place in said exhaust gas particle filter during the regeneration process, wherein said control unit is equipped such that during the regeneration process an instantaneous value, which characterizes an instantaneous mass of the soot situated in said exhaust gas particle filter, is ascertained, a check is made as a function of said instantaneous value to determine whether said exhaust gas particle filter is in an uncritical operating state and said safeguards are suppressed in the event that the uncritical operating state is present.
Dependencies are inferred from the claim text.