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| Number | Title | Issue Date |
| 7367184 | Fuel injection control device for internal combustion engine A fuel injection amount control device is used for an internal combustion engine. A secondary air supply device supplies secondary air into an exhaust passage of the internal combustion engine. Flow amount calculating circuitry calculates a secondary air flow amount... | 05/06/2008 |
| 7343733 | System and method for monitoring the efficiency of a catalyst treating engine exhaust A method for monitoring the efficiency of a catalyst includes providing an oxygen sensor between an engine and the catalyst to generate an output signal indicative of oxygen content. The output signal is sampled to provide a first value indicative of the oxygen cont... | 03/18/2008 |
| 7337608 | Exhaust gas cleaning system An exhaust gas purifying system causes less torque fluctuation and is capable of preventing the occurrence of white smoke in a regeneration control operation for regenerating a continuous regeneration DPF 3. When the continuous regeneration DPF 3 with ... | 03/04/2008 |
| 7322186 | Exhaust gas purifying system for internal combustion engine In an exhaust gas purifying apparatus for a diesel engine having a diesel particulate filter provided in an exhaust pipe, a pressure loss at the filter is detected. An accumulated amount of diesel particulates in the filter is calculated based on the pressure loss a... | 01/29/2008 |
| 7281369 | Deterioration diagnosis of diesel particulate filter A filter (14) traps particulate matter contained in the exhaust gas of a diesel engine (1). The filter (14) is regenerated by burning the trapped particulate matter through an operation to raise the exhaust gas temperature. An oxidation catalyst... | 10/16/2007 |
| 7269942 | Wall flow particulate trap system A wall-flow particulate trap system regenerated by reverse flow of filtered exhaust gas through porous walls of a plurality of tubular passages is disclosed. The system includes a particulate trap having an inlet and an outlet, the particulate trap adapted to receiv... | 09/18/2007 |
| 7263825 | Apparatus, system, and method for detecting and labeling a filter regeneration event An apparatus, system, and method are disclosed for detecting and evaluating a filter regeneration event. The apparatus, in one embodiment, is configured to determine whether an oxidation rate of soot accumulated on a particulate filter has attained a level sufficien... | 09/04/2007 |
| 7251932 | Exhaust system and method for controlling exhaust gas flow and temperature through regenerable exhaust gas treatment devices A reconfigurable exhaust system provides selective positioning of exhaust gas treatment devices either near, or spaced from, the exhaust gas outlet port of a turbine of a turbocharged Diesel engine. In some embodiments, auxiliary air or a heat exchanger are arranged... | 08/07/2007 |
| 7231291 | Apparatus, system, and method for providing combined sensor and estimated feedback An apparatus, system, and method are disclosed for providing system feedback from combined input values in a sensor-based control system wherein the reliability of a sensor response is questionable under defined conditions. The apparatus, in one embodiment, is confi... | 06/12/2007 |
| 7188512 | Apparatus, system, and method for calibrating a particulate production estimate An apparatus, system, and method are disclosed for calibrating an estimate of the status of a mechanism or process, for example, particulate production from a diesel engine. A first estimator makes a first particulate production rate estimate as a function of, for e... | 03/13/2007 |
| 7181909 | Control method for an exhaust gas purification system and an exhaust gas purification system When a forced regeneration is restarted after interrupting the forced regeneration, and in at least any one of cases where the collecting quantity area (Rpj) detected by the collecting quantity area detection means (32C) is in another collecting quantity area... | 02/27/2007 |
| 7171803 | Exhaust gas purification system of internal combustion engine An electronic control unit (ECU) calculates a pressure loss in an exhaust passage downstream of a diesel particulate filter (DPF) fluctuating in accordance with an operating state of an engine based on the operating state as a pressure loss in the exhaust passage co... | 02/06/2007 |
| 7159392 | Estimation of particulate matter deposit amount in diesel particulate filter This invention relates to estimation of a particulate matter deposit amount in a diesel particulate filter (1) provided in an exhaust passage (7) of a vehicle diesel engine (10). When the vehicle speed exceeds a predetermined vehicle speed, a di... | 01/09/2007 |
| 7159387 | Emission control device Various systems and methods are disclosed for carrying out combustion in a fuel-cut operation in some or all of the engine cylinders of a vehicle. Further, various subsystems are considered, such as fuel vapor purging, air-fuel ratio control, engine torque control, ... | 01/09/2007 |
| 7140177 | Secondary air supply system and abnormality diagnosis method of secondary air supply system In a secondary air supply system, each of two branch portions of a secondary air supply pipe that is divided from a joint portion is provided with an air control valve, and the joint portion is provided with a pressure sensor and an auxiliary air control valve. The ... | 11/28/2006 |
| 7131262 | Secondary airflow system for engine exhaust emission diagnostics In one example, a system for an engine having an intake system and an exhaust system is described. The system comprises: an airflow sensor coupled to the intake system; an air pump having at least an inlet side and an outlet side, said inlet side having a first coup... | 11/07/2006 |
| 7121088 | Automotive exhaust valve A valve assembly is adapted to be disposed in an automotive engine exhaust system at an outlet of an internal combustion engine. The assembly includes a valve body having an opening therethrough including an inlet portion and an outlet portion. A first valve and a s... | 10/17/2006 |
| 7117668 | Method and apparatus for rapid exhaust catalyst light-off An internal combustion engine is supplied with reformate from a hydrocarbon reformer at engine start-up and during engine warm-up. The reformate fuel mixture is fuel-lean at start-up to ensure that all the fuel is burned while the exhaust converter is thermally non-... | 10/10/2006 |
| 7111455 | Exhaust cleaning device of internal combustion engine An exhaust cleaning device of an internal combustion engine includes a particulate filter disposed in an exhaust duct of the internal combustion engine. A regeneration control increases the temperature of the particulate filter to approximately a predetermined targe... | 09/26/2006 |
| 7104050 | Control method for an exhaust gas purification system and an exhaust gas purification system A method and system providing a vehicle condition detection means (38C) for detecting the stopped and traveling state of a vehicle, and when the vehicle condition detection means (38C) detects that the vehicle has stopped during operation of an exhaust... | 09/12/2006 |
| 7093430 | Method and device for implementing a method for ascertaining the load condition of a component arranged in an exhaust-gas region of an internal combustion engine A method and a device for implementing a method for ascertaining the load condition with an exhaust-gas component of a component arranged in an exhaust-gas region of an internal combustion engine is provided in which an increase in the exhaust-mass flow of the inter... | 08/22/2006 |
| 7043900 | Turbocharged engine control system A turbocharged engine control system is provided that comprises an exhaust gas after-treatment system and a variable-capacity turbocharger. The turbocharged engine control system is configured to estimate a clogging ratio of the exhaust gas after-treatment system ba... | 05/16/2006 |
| 7032375 | Secondary air supply system In the disclosed secondary air supply system, an on-off valve (13) is driven by the discharge pressure of an air pump (12). A diaphragm chamber (44) is arranged in the neighborhood of a discharge outlet (54), and a part of the discharge a... | 04/25/2006 |
| 6978604 | Soot burn-off control strategy for a catalyzed diesel particulate filter A control system (FIG. 4) for controlling regeneration of a DPF comprises a favorable-condition-based control section (52), a regular control section (54), and a regeneration termination control section (56). Section (54) initiates... | 12/27/2005 |
| 6962046 | Exhaust gas cleaning system having particulate filter An electronic control unit (ECU) of an exhaust gas cleaning system for an internal combustion engine having a diesel particulate filter (DPF) determines whether collection quantity of exhaust particulate matters collected by the DPF is greater than a regeneration st... | 11/08/2005 |
| 6910329 | System for controlling particulate filter temperature A system for controlling the temperature of a particulate filter coupled to an exhaust outlet of an internal combustion engine includes a controller responsive to volumetric flow and temperature of exhaust gas to determine a filter regeneration parameter. In a hybri... | 06/28/2005 |
| 6829889 | Exhaust gas cleaning device for internal combustion engine The recycling timing schedule for a diesel particulate filter (DPF) can be easily and accurately determined. There is a differential pressure sensor that detects differential pressure ΔP in the DPF, and an airflow meter that detects the flow velocity v in an exhaus... | 12/14/2004 |
| 6779339 | Method for NOx adsorber desulfation in a multi-path exhaust system The method of treating a fuel lean exhaust containing NOX and SO2 includes splitting the exhaust into major and minor portions for flow through multiple flow paths each of which contains a particulate trap and an absorber containing a NOX ... | 08/24/2004 |
| 6758038 | Temperature estimating apparatus for internal combustion engine A temperature estimating apparatus for an internal combustion engine is provided for correctly calculating the temperature of an exhaust device even when the internal combustion engine is started under low temperature conditions. The temperature estimating apparatus... | 07/06/2004 |
| 6742335 | EGR control system and method for an internal combustion engine EGR mass fraction or a value indicative thereof can be calculated based on temperature measurements rather than mass flow and/or pressure measurements, hence negating the need for expensive and relatively unreliable measurement devices in an active EGR system for an... | 06/01/2004 |
| 6735941 | Exhaust gas purification system having particulate filter An engine control unit of an exhaust gas purification system of an internal combustion engine measures a pressure difference between an upstream and a downstream of a diesel particulate filter (DPF) after heating the DPF at least to a predetermined temperature and m... | 05/18/2004 |
| 6694728 | Exhaust gas dilution apparatus An exhaust gas dilution apparatus 10-2 is the same form multi-venturi type comprising a rectifier 11, divider 12, exhaust chamber 14, dilution tunnel 15, and a divider pipes 13t on the dilution side of a tunnel 15 side. All divider pipes 13 are provided w... | 02/24/2004 |
| 6581370 | Failure determination device for humidity sensor and control system for exhaust passage changeover valve A failure determination device that detects the humidity of exhaust gases from an internal combustion engine and a control system for an exhaust passage changeover valve, which can switch the changeover valve with appropriate timing, thereby enabling suff... | 06/24/2003 |
| 6519935 | Device and method for exhaust-gas aftertreatment in an internal-combustion engine In order to prevent that a liquid reducing agent in a selective catalytic reduction system freezes, there are provided additional resistor heating elements on the pressure sensor diaphragm of the pressure sensor that is present in the reducing agent feed ... | 02/18/2003 |
| 6453667 | Air control valve and method for engine exhaust gas treatment Various embodiments of air control valves are disclosed. Each has a mechanism, controlled by a solenoid and by the difference between fluid pressure at its inlet and fluid pressure at its outlet, for allowing communication between an air pump and an exhau... | 09/24/2002 |
| 6438948 | Device for purifying the exhaust gas of an internal combustion engine A device for purifying the exhaust gas of an internal combustion engine is disclosed. The device comprises a particulate trap disposed in the engine exhaust system, an exhaust gas recirculation passage communicating the upstream of the particulate trap in... | 08/27/2002 |
| 6422006 | Exhaust gas purifying apparatus for internal combustion engine An exhaust gas purifying apparatus for an internal combustion engine is provided for simultaneously realizing sufficient recovery of the adsorbing capability of an adsorbent and limitation to an increase in exhaust resistance. The exhaust gas purifying ap... | 07/23/2002 |
| 6397586 | Emission control apparatus and method of internal combustion engine An emission control apparatus for an internal combustion engine has a bypass passage bypassing a portion of a main exhaust passage located upstream of an exhaust gas-purifying catalyst device, an adsorbent provided in the bypass passage, a passage switchi... | 06/04/2002 |
| 6233927 | Exhaust gas purification device According to the present invention, there is provided an exhaust gas purification device, comprising a NOx absorbent arranged in an exhaust passage of an engine for absorbing NOx therein when an air-fuel ratio of an exhaust gas flowi... | 05/22/2001 |
| 6192676 | Device for reducing the NOx content in the exhaust gas of an internal combustion engine A completely self-contained device reduces the NOx content in the exhaust gas of an internal combustion engine operated with excess air. One or more reduction catalytic converters working according to the SCR principle are provided. A reducing ... | 02/27/2001 |
