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| Number | Title | Issue Date |
| 7455058 | Method and apparatus for controlling stationary gaseous-fueled internal combustion engines A method and system is disclosed which relates to controlling a stationary gaseous-fueled internal combustion engine. The method may include measuring an air to fuel ratio of the engine, calculating a difference between the measured air to fuel ratio and a desired a... | 11/25/2008 |
| 7367330 | Internal combustion engine controller The internal combustion engine controller includes an oxygen concentration sensor outputting an electric signal having a value depending on an oxygen concentration in an exhaust gas flowing through an exhaust passage of an internal combustion engine, and a control u... | 05/06/2008 |
| 7349790 | Method for operating a flex fuel conversion system A method for operating a flex fuel conversion system for efficiently providing an aftermarket fuel delivery system which allows a vehicle to be operated on gasoline, ethanol or any combination of gasoline and ethanol. The a method for operating a flex fuel conversio... | 03/25/2008 |
| 7322346 | Method and device for engine control in a motor vehicle A method is specified for controlling a combustion engine in a motor vehicle, namely for optimally adjusting an air/fuel ratio which is distinguished in that the air/fuel ratio is the result of a regulation process. Individual aspects of the invention further addres... | 01/29/2008 |
| 7302942 | Method and device for operating an internal combustion engine A method and a device for operating an internal combustion engine make it possible to monitor a temperature sensor or a lambda sensor in an exhaust system of the internal combustion engine for functionality in the entire operating range of the internal combustion en... | 12/04/2007 |
| 7278394 | Air-fuel-ratio control apparatus for internal combustion engine The air-fuel-ratio control apparatus for an internal combustion engine obtains an upstream-side feedback correction value DFi for feedback-controlling an air-fuel ratio on the basis of a value (Fcrlow(k−N)) that is obtained by performing a low-pass filter process ... | 10/09/2007 |
| 7261098 | System and method for adjusting the exhaust gas recirculation rate in an internal combustion engine An exhaust gas recirculation system for an internal combustion engine, which comprises an intake plenum, an exhaust gas system, and a fresh-air feed line and an exhaust gas recirculation line connected to the intake plenum, includes a sensor, arranged in the intake ... | 08/28/2007 |
| 7251571 | Methods of diagnosing open-secondary winding of an ignition coil using the ionization current signal In a first embodiment, the present invention is a method of detecting an open secondary winding, including the steps of enabling an integrator, resetting the integrator, detecting an ionization current, integrating the ionization current over a spark window, compari... | 07/31/2007 |
| 7243487 | Control apparatus for internal combustion engine A control apparatus for the internal combustion engine includes a fuel cut post-return fuel increasing correction unit for performing a fuel increasing correction during a specified period when a fuel supply stop state by an fuel cut control unit is returned to a fu... | 07/17/2007 |
| 7240671 | Device for correcting fuel injection amount of internal combustion engine, and control apparatus for internal combustion engine employing the device To prevent RPM decrease, misfire, and engine stall by refraining from correcting, the amount of fuel to shift an air-fuel ratio toward a lean side to the extent of exceeding a combustion limit when the internal combustion engine operates at a low load, a control app... | 07/10/2007 |
| 7231909 | Air intake apparatus and control apparatus for an internal combustion engine In an air intake apparatus for an internal combustion engine providing a throttle body for each of a plurality of air intake passages provided for each cylinder of the internal combustion engine, an air flow meter which measures an air volume suctioned into a cylind... | 06/19/2007 |
| 7231807 | Gas measuring device and method with compensation of disturbances Disclosed is a gas measuring device which comprises compensation of disturbances and offers high accuracy of measurement immediately after being activated. Said gas measuring device is provided with a gas sensor (1) for generating a measuring signal (S1 | 06/19/2007 |
| 7170303 | Fuel sensor A sensor (20) includes a single capacitor (30) that operates in two different modes to obtain capacitance and conductance information when a mixture flows between the electrodes (32, 34) of the capacitor. Two different oscillators (180, 182 | 01/30/2007 |
| 7154326 | Dither amplitude correction for constant current drivers In satisfying the above need, as well as overcoming the enumerated drawbacks and other limitations of the related art, the present invention provides an improved switched driver circuit. As disclosed above, there is a need to compensate for the high impedance load c... | 12/26/2006 |
| 7146972 | Exhaust gas sensor activation judgment and air fuel ratio control system/method An air fuel ratio control system includes an exhaust gas sensor to sense an oxygen concentration in an exhaust passage of an internal combustion engine, and a controller. The controller is configured to judge that the exhaust gas sensor is in an active state, by mon... | 12/12/2006 |
| 7144494 | Circuit arrangement for compensating interference signals in the control loop of a linear lambda probe A compensation circuit (KS) is provided between the output of a differential amplifier (Diff_Amp) and the input of a controller (R). The compensation circuit generates a compensation signal, whose characteristic curve approximates to that of the parasitic signal, wi... | 12/05/2006 |
| 7098550 | Method for controlling a wind energy plant The present invention concerns a method of controlling a wind power installation and a wind power installation in particular for carrying out the method. Wind power installations have been generally known for a long time and in recent times are increasingly u... | 08/29/2006 |
| 7082935 | Apparatus and methods for closed loop fuel control A method of controlling fuel input to an engine of a vehicle. A feedback signal is received from a sensor that senses engine exhaust. A dither signal having the same frequency as the feedback signal is applied to a fuel control signal controlling fuel to the engine.... | 08/01/2006 |
| 7055372 | Method of detecting cylinder ID using in-cylinder ionization for spark detection following partial coil charging The present feature of the invention comprises a method and apparatus for determining cylinder ID. When a cylinder is compressed, the resistance increases across the spark plug gap. Thus, if a spark coil is only partially charged before activation of the spark, the ... | 06/06/2006 |
| 7050902 | Control system for internal combustion engine comprising a sensor and an interface for digitising measurement values A control system for an internal combustion engine has a motor control apparatus (1) and a sensor unit with an interface (21) to the motor control apparatus. An evaluating unit (211) is integrated into the interface for digitalizing measurements... | 05/23/2006 |
| 6973912 | Method of controlling operation of internal combustion engine An amount-of-air detecting time period Ti is preset based on an intake time period Tr during which intake air is actually drawn into a cylinder chamber. An intake air amount average value Qa during a time period, other than the time period Ti, between intake strokes... | 12/13/2005 |
| 6938592 | Control method for electro-hydraulic control valves over temperature range In a variable cam timing (VCT) system (10a) which has a feedback control loop wherein an error signal (36) relating to at least one sensed position signal of either a crank shaft position (24a) or at least one cam shaft position ( | 09/06/2005 |
| 6923902 | Methods and apparatus for measuring NOx gas concentration, for detecting exhaust gas concentration and for calibrating and controlling gas sensor A method for detecting the concentration of a specific component in gas discharged from an internal combustion engine, which includes detecting the concentration of the specific component under certain driving conditions to determine a zero point, which indicates a ... | 08/02/2005 |
| 6918385 | Air-fuel ratio detecting apparatus of engine and method thereof A temperature of an oxygen concentration detector generating an electromotive force according to a difference between oxygen concentration in an engine exhaust gas and oxygen concentration in the atmosphere, is detected, and coefficients in a transformation for conv... | 07/19/2005 |
| 6912887 | Oxygen sensor abnormality detecting device having offset voltage circuit An oxygen sensor abnormality detecting device has first and second offset circuits for applying first and second offset voltages to a ground line and an output line of an oxygen sensor. The device compares the voltage of the output line with a high voltage-side shor... | 07/05/2005 |
| 6837233 | System for enhancing performance of an internal combustion engine A system for improving the performance of a motor vehicle internal combustion engine includes a controller positioned between an O2 sensor. The controller alters the O2 sensor signals and adjusts supplemental sensor signals received from supple... | 01/04/2005 |
| 6837232 | Air-fuel ratio control apparatus for internal combustion engine When in controlling an air-fuel ratio by a feedback control, a target air-fuel ratio is changed between normal time and at rich control time, a difference between a change amount of the target air-fuel ratio and a change amount of an air-fuel ratio feedback correcti... | 01/04/2005 |
| 6591183 | Control apparatus for internal combustion engine An intermediate target value calculating unit calculates an intermediate target value $c;midtg(i) on the basis of an output $c;(i-1) of an A/F ratio sensor in computation of last time and a final target value $c;tg(i). By the computation, the int... | 07/08/2003 |
| 6497135 | Controller for use with wide range oxygen sensor A voltage sensing system that has a pair of input leads having a first input lead, and a second input lead each sensing a non-grounded voltage, and an amplifier coupled to the pair of input leads, the amplifier generating an amplifier output voltage in re... | 12/24/2002 |
| 6491033 | Oxygen sensor and feedback system for outboard motor engine An outboard motor engine includes a feedback control system for controlling the air/fuel ratio of the air/fuel mixture combusted within the engine. The control system can be configured to vary the target output value of a combustion condition sensor in ac... | 12/10/2002 |
| 6357431 | Wave form fuel/air sensor target voltage A method of determining a goal voltage for a fuel/air sensor of an engine electronic fuel injection system includes the steps of determining a goal fuel/air sensor voltage, superimposing a wave form forcing function to the fuel/air sensor voltage for prov... | 03/19/2002 |
| 6260547 | Apparatus and method for improving the performance of a motor vehicle internal combustion engine A controller is interposed between the O2 sensor and electronic control unit of a motor vehicle to modify the O2 sensor signals before they are received by the electronic control unit so that a richer fuel mixture is introduced into ... | 07/17/2001 |
| 6231735 | Oxygen linear sensor test arrangement The control arrangement comprises an oxygen linear test sensor located along the exhaust duct of an internal combustion engine, the sensor having a chamber able to receive part of the exhaust gas and two electrolytic cells of which one is electrically pil... | 05/15/2001 |
| 6223735 | Control method for an oxygen linear sensor Control method for an oxygen linear sensor, in which the sensor is located along an exhaust duct of an internal combustion engine to receive into a separate chamber part of the exhaust gas and generate a first signal representative of the swing between th... | 05/01/2001 |
| 6205989 | Control device for air-fuel radio sensor A control device for an air-fuel ratio sensor for detecting, from an oxygen concentration detecting device, a current corresponding to a concentration of oxygen contained in a gas by applying a voltage to the oxygen concentration detecting device. The con... | 03/27/2001 |
| 5983878 | Engine control The present invention is an engine control for an internal combustion engine having at least one combustion chamber and an air/fuel charging system for delivering an air and fuel charge to the combustion chamber for combustion therein. The control include... | 11/16/1999 |
| 5970968 | Control of a multi (flexible) fueled vehicle utilizing wide range oxygen sensor feedback A method for utilizing a wide range oxygen sensor voltage output that is proportional to exhaust gas fuel air mixture to correct for variations in a flexible fueled vehicle's fuel alcohol content is provided for a vehicle not equipped with an alcohol sens... | 10/26/1999 |
| 5931143 | Air-fuel ratio control system based on adaptive control theory for internal combustion engines An air-fuel ratio control system for an internal combustion includes an air-fuel ratio sensor arranged in the exhaust system, and an ECU which controls an amount of fuel to be supplied to the engine in a feedback manner based on an output from the air-fue... | 08/03/1999 |
| 5918584 | Engine control system Several embodiments of feedback control systems for either two or four-cycle engines that employ sensors such as oxygen sensors. The systems include an arrangement wherein the sensor condition is determined by comparing the response time with a normal res... | 07/06/1999 |
| 5878733 | Air-fuel ratio control system for internal combustion engines There is provided an air-fuel ratio control system for an internal combustion. An air-fuel ratio sensor arranged in the exhaust system detects an air-fuel ratio of exhaust gases emitted from the engine. An amount of fuel to be supplied to the engine is co... | 03/09/1999 |
