Patents by Inventor Andreas Pfaeffle
Andreas Pfaeffle has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8015805Abstract: A method for regenerating an exhaust aftertreatment system, in particular a particulate filter of an internal combustion engine, situated in a vehicle, having regeneration cycles controlled by a control device. An optimized regeneration of the exhaust aftertreatment system is achieved by supplying information relating to the travel route to the control device and controlling the regeneration cycles, taking the information into consideration.Type: GrantFiled: December 8, 2004Date of Patent: September 13, 2011Assignee: Robert Bosch GmbHInventors: Andreas Pfaeffle, Ralf Wirth, Marcel Wuest, Hartmut Lueders, Thomas Hauber
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Patent number: 7937931Abstract: A procedure is introduced to operate a diesel engine, which has a catalytic converter with three-way conversion characteristics. The procedure is characterized thereby, in that if the engine rotational speed increases without in the process exceeding an engine rotational speed threshold value and the engine's load is greater than a load threshold value, the diesel engine is operated in such a manner that the diesel engine alternately generates an oxidizing and a reductive exhaust gas atmosphere before the catalytic converter. Additionally a control unit is introduced, which controls the sequence of the procedure.Type: GrantFiled: September 4, 2007Date of Patent: May 10, 2011Assignee: Robert Bosch GmbHInventors: Andreas Pfaeffle, Wolfgang Klenk, Frank Schweizer, Stefan Scherer, Andreas Schaffrath
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Patent number: 7665295Abstract: A method is provided for operating an internal combustion engine in whose exhaust-gas region an exhaust-gas treatment device is situated, and in which a reagent is introduced into the exhaust-gas region of the internal combustion engine. in addition, a device is provided for implementing the method. The reagent pressure occurring between a reagent safety valve and a reagent dosing valve, disposed directly in the exhaust-gas region is recorded during different states of the reagent safety valve and/or the reagent dosing valve and compared to at least one threshold value. If the threshold is exceeded, a fault signal is provided. This may offer high safety which may be of particular importance when fuel is used as reagent.Type: GrantFiled: January 10, 2006Date of Patent: February 23, 2010Assignee: Robert Bosch GmbHInventors: Andreas Pfaeffle, Johannes Schaller, Wolfram Veigel, Cord Scharsack, Rudi Drefs, Viktor Pauli, Thomas Eh Walter
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Patent number: 7500465Abstract: A method for operating an internal combustion engine, in which fuel is injected into a combustion chamber of a cylinder of the internal combustion engine in at least two partial injections, and in which an actual torque supplied by the internal combustion engine is ascertained from operating variables of the internal combustion engine, this actual torque being compared to an admissible torque, and an error response being initiated if the actual torque is at a predefined ratio to the admissible torque. In the ascertainment of the actual torque, taking into consideration a torque efficiency of the respective partial injection is provided, whereby a more accurate monitoring of the actual torque is made possible.Type: GrantFiled: August 18, 2005Date of Patent: March 10, 2009Assignee: Robert Bosch GmbHInventors: Andreas Pfaeffle, Marco Gangi, Gerit Von Schwertfuehrer
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Publication number: 20080103673Abstract: A method for operating an internal combustion engine, in which fuel is injected into a combustion chamber of a cylinder of the internal combustion engine in at least two partial injections, and in which an actual torque supplied by the internal combustion engine is ascertained from operating variables of the internal combustion engine, this actual torque being compared to an admissible torque, and an error response being initiated if the actual torque is at a predefined ratio to the admissible torque. In the ascertainment of the actual torque, taking into consideration a torque efficiency of the respective partial injection is provided, whereby a more accurate monitoring of the actual torque is made possible.Type: ApplicationFiled: August 18, 2005Publication date: May 1, 2008Inventors: Andreas Pfaeffle, Marco Gangi, Gerit Von Schwertfuehrer
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Publication number: 20080053077Abstract: A procedure is introduced to operate a diesel engine (10), which has a catalytic converter (24; 26) with three-way conversion characteristics. The procedure is characterized thereby, in that if the engine rotational speed (n) increases without in the process exceeding an engine rotational speed threshold value (n_S) and the engine's load (mk) is greater than a load threshold value (mk_S), the diesel engine (10) is operated in such a manner that the diesel engine (10) alternately generates an oxidizing and a reductive exhaust gas atmosphere before the catalytic converter (24; 26). Additionally a control unit (14) is introduced, which controls the sequence of the procedure.Type: ApplicationFiled: September 4, 2007Publication date: March 6, 2008Applicant: Robert Bosch GmbHInventors: Andreas Pfaeffle, Wolfgang Klenk, Frank Schweizer, Stefan Scherer, Andreas Schaffrath
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Patent number: 7337658Abstract: A method is described for operating an internal combustion engine, in particular of a motor vehicle. In the method, a lean air/fuel mixture is burned in a combustion chamber; nitrogen oxides contained in the exhaust gas are stored in an accumulator-type catalytic converter; a storage efficiency, with which the accumulator-type catalytic converter stores the nitrogen oxides contained in the exhaust gas, is ascertained; and the storage efficiency is ascertained as a function of an instantaneous space velocity of the exhaust gases in the accumulator-type catalytic converter. Two efficiencies are ascertained at least as a function of the temperature of the accumulator-type catalytic converter and a space velocity. One of the two efficiencies is ascertained for a great space velocity, and the other efficiency is ascertained for a small space velocity. The storage efficiency is ascertained as a function of the instantaneous space velocity from the two efficiencies.Type: GrantFiled: April 6, 2004Date of Patent: March 4, 2008Assignee: Robert Bosch GmbHInventors: Andreas Pfaeffle, Wolfgang Klenk, Stefan Scherer, Simone Neuberth, Albrecht Schwaderer
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Patent number: 7337059Abstract: A method and a device for controlling an internal combustion engine. In a first operating mode, a fuel quantity is predefined according to a first rule for calculating the quantity based on at least the torque variable. In a second operating mode, the fuel quantity is predefined according to a second rule for calculating the quantity based on at least the torque variable. A control variable is predefined on the basis of at least the torque variable.Type: GrantFiled: January 11, 2006Date of Patent: February 26, 2008Assignee: Robert Bosch GmbHInventors: Andreas Pfaeffle, Stefan Polach, Dietmar Stapel, Oliver Brox, Matthias Wild
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Publication number: 20070163231Abstract: A method is described for operating an internal combustion engine, in particular of a motor vehicle. In the method, a lean air/fuel mixture is burned in a combustion chamber; nitrogen oxides contained in the exhaust gas are stored in an accumulator-type catalytic converter; a storage efficiency, with which the accumulator-type catalytic converter stores the nitrogen oxides contained in the exhaust gas, is ascertained; and the storage efficiency is ascertained as a function of an instantaneous space velocity of the exhaust gases in the accumulator-type catalytic converter. Two efficiencies are ascertained at least as a function of the temperature of the accumulator-type catalytic converter and a space velocity. One of the two efficiencies is ascertained for a great space velocity, and the other efficiency is ascertained for a small space velocity. The storage efficiency is ascertained as a function of the instantaneous space velocity from the two efficiencies.Type: ApplicationFiled: April 6, 2004Publication date: July 19, 2007Inventors: Andreas Pfaeffle, Wolfgang Klenk, Stefan Scherer, Simone Neuberth, Albrecht Schwaderer
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Publication number: 20070039311Abstract: A method for operating a component part situated in an exhaust gas region of an internal combustion engine, and a device for carrying out the method are proposed, in which, in a first operating phase, an exhaust gas component is embedded, and which, in a second operating phase, is regenerated from the exhaust gas component. The second operating phase may be started both as a function of the operating state of the component part and/or as a function of the operating state of the internal combustion engine, and also by an external start signal. If there is an external start signal present, the second operating phase is preferably only started if, at the same time, at least one additional conditions is satisfied. The external start signal is made available, for instance, by a diagnostic unit which is connected via a diagnosis interface.Type: ApplicationFiled: May 24, 2004Publication date: February 22, 2007Inventors: Andreas Pfaeffle, Ralf Wirth, Marcel Wuest
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Patent number: 7150261Abstract: A device and a method for controlling an internal combustion engine in which a fuel-quantity variable is ascertained on the basis of at least one torque variable. For at least two operating modes the fuel-quantity variable is ascertained according to two different procedures.Type: GrantFiled: July 28, 2005Date of Patent: December 19, 2006Assignee: Robert Bosch GmbHInventors: Andreas Pfaeffle, Stefan Polach, Dietmar Stapel, Oliver Brox, Matthias Wild
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Patent number: 7127882Abstract: Described is a method for controlling a temperature downstream of a catalyst in the exhaust tract of an internal combustion engine including a first control loop in which a first control variable is calculated from a first deviation that is calculated from a first actual value and a first setpoint value and influences an intra-engine heat generation. In the process, the first actual value is determined as a measure of a temperature downstream of the catalyst. The method features a second control loop in which at least one second control variable is calculated from a second deviation that is calculated from a second actual value and a second setpoint value; a temperature upstream of the catalyst being determined as the second actual value. Also described is a controller which controls the sequence of such a method.Type: GrantFiled: January 14, 2005Date of Patent: October 31, 2006Assignee: Robert Bosch GmbHInventors: Andreas Pfaeffle, Marcel Wuest, Dirk Samuelsen, Stefan Forthmann, Michael Kolitsch, Andreas Fritsch
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Publication number: 20060173605Abstract: A method and a device for controlling an internal combustion engine. In a first operating mode, a fuel quantity is predefined according to a first rule for calculating the quantity based on at least the torque variable. In a second operating mode, the fuel quantity is predefined according to a second rule for calculating the quantity based on at least the torque variable. A control variable is predefined on the basis of at least the torque variable.Type: ApplicationFiled: January 11, 2006Publication date: August 3, 2006Inventors: Andreas Pfaeffle, Stefan Polach, Dietmar Stapel, Oliver Brox, Matthias Wild
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Publication number: 20060168941Abstract: A method is provided for operating an internal combustion engine in whose exhaust-gas region an exhaust-gas treatment device is situated, and in which a reagent is introduced into the exhaust-gas region of the internal combustion engine. in addition, a device is provided for implementing the method. The reagent pressure occurring between a reagent safety valve and a reagent dosing valve, disposed directly in the exhaust-gas region is recorded during different states of the reagent safety valve and/or the reagent dosing valve and compared to at least one threshold value. If the threshold is exceeded, a fault signal is provided. This may offer high safety which may be of particular importance when fuel is used as reagent.Type: ApplicationFiled: January 10, 2006Publication date: August 3, 2006Inventors: Andreas Pfaeffle, Johannes Schaller, Wolfram Veigel, Cord Scharsack, Rudi Drefs, Viktor Pauli, Thomas Walter
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Publication number: 20060054131Abstract: A device and a method for controlling an internal combustion engine in which a fuel-quantity variable is ascertained on the basis of at least one torque variable. For at least two operating modes the fuel-quantity variable is ascertained according to two different procedures.Type: ApplicationFiled: July 28, 2005Publication date: March 16, 2006Inventors: Andreas Pfaeffle, Stefan Polach, Dietmar Stapel, Oliver Brox, Matthias Wild
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Publication number: 20050268601Abstract: A method for regenerating a particle filter of an internal combustion engine, of a diesel engine in particular, in which a characteristic quantity for the particle loading is determined to initiate regeneration. More accurate correlation of the particle mass is achieved in that a corrected loading characteristic quantity is formed from the loading characteristic quantity by modifying the loading characteristic quantity using a compression factor which takes into account different degrees of compression of the particles as a function of different operating states of the engine.Type: ApplicationFiled: April 7, 2005Publication date: December 8, 2005Inventors: Andreas Pfaeffle, Ralf Wirth, Marcel Wuest, Dirk Samuelsen, Stefan Forthmann, Carsten Becker, Michael Kolitsch, Andreas Fritsch
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Patent number: 6968682Abstract: In a method and device for controlling an internal combustion engine having an exhaust treatment system, a quantity characterizing the status of the exhaust treatment system is determined on the basis of at least one operating parameter of the internal combustion engine.Type: GrantFiled: April 27, 2000Date of Patent: November 29, 2005Assignee: Robert Bosch GmbHInventors: Markus Leuz, Andreas Pfaeffle, Ralf Schernewski
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Publication number: 20050245352Abstract: A method for operating an exhaust gas treatment device of an internal combustion engine in which a change in the operating mode of the internal combustion engine is made as a function of a parameter. A timer is started in response to an operative mode change request. During the time period set by the timer, the system continuously decides, based on evaluation of at least one parameter, whether the change in operating mode can be made. If this is the case, the operative mode change is made immediately. If this is not the case, the operative mode change is made no later than when the time period set by the timer has expired. The method ensures that a driver of a motor vehicle in which the internal combustion engine is provided for propulsion will not notice a torque jump of the internal combustion engine, possibly occurring during an operative mode change.Type: ApplicationFiled: January 27, 2005Publication date: November 3, 2005Inventors: Andreas Pfaeffle, Michael Kolitsch, Andreas Schaffrath
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Publication number: 20050166580Abstract: A method for regenerating an exhaust aftertreatment system, in particular a particulate filter of an internal combustion engine, situated in a vehicle, having regeneration cycles controlled by a control device. An optimized regeneration of the exhaust aftertreatment system is achieved by supplying information relating to the travel route to the control device and controlling the regeneration cycles, taking the information into consideration.Type: ApplicationFiled: December 8, 2004Publication date: August 4, 2005Inventors: Andreas Pfaeffle, Ralf Wirth, Marcel Wuest, Hartmut Lueders, Thomas Hauber
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Publication number: 20050150212Abstract: Described is a method for controlling a temperature downstream of a catalyst in the exhaust tract of an internal combustion engine including a first control loop in which a first control variable is calculated from a first deviation that is calculated from a first actual value and a first setpoint value and influences an intra-engine heat generation. In the process, the first actual value is determined as a measure of a temperature downstream of the catalyst. The method features a second control loop in which at least one second control variable is calculated from a second deviation that is calculated from a second actual value and a second setpoint value; a temperature upstream of the catalyst being determined as the second actual value. Also described is a controller which controls the sequence of such a method.Type: ApplicationFiled: January 14, 2005Publication date: July 14, 2005Inventors: Andreas Pfaeffle, Marcel Wuest, Dirk Samuelsen, Stefan Forthmann, Michael Kolitsch, Andreas Fritsch