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| Number | Title | Issue Date |
| 8176767 | Exhaust gas sensor Exhaust-gas sensors that have a sensor element, which is surrounded by two protective tubes on a side facing the exhaust gas and which is additionally protected by a porous fiber package, are already known. The fiber package is disposed between the two protective tu... | 05/15/2012 |
| 8056393 | Signal processor for gas sensor The present invention provides, as one aspect, a signal processor for a gas sensor that is disposed in an exhaust passage of an internal combustion engine and senses concentration of a specific component in exhaust gas. The signal processor includes a calculation un... | 11/15/2011 |
| 8015855 | Exhaust gas sensor A method of manufacturing an exhaust gas sensor allows the manufacturer to selectively control the air-voltage range of the manufactured sensor between a first air-voltage range and a second air-voltage range. The sensor includes a signal wire and a ground wire. The... | 09/13/2011 |
| 8011231 | Control apparatus for internal combustion engine The control apparatus for the internal combustion engine includes: a unit for detecting the change in the alcohol concentration of a fuel supplied to the internal combustion engine including a plurality of cylinders; a unit for detecting an air-fuel ratio variation ... | 09/06/2011 |
| 7975537 | Systems and methods for sensing an ammonia concentration in exhaust gases Systems and methods for determining an NH3 concentration in exhaust gases from an engine are provided. In one exemplary embodiment, a method includes generating a first signal from an NH3 sensor fluidly communicating with the exhaust gases. The... | 07/12/2011 |
| 7950269 | Control apparatus for internal combustion engine The control apparatus for the internal combustion engine includes: a unit for detecting the change in the alcohol concentration of a fuel supplied to the internal combustion engine including a plurality of cylinders; a unit for detecting an air-fuel ratio variation ... | 05/31/2011 |
| 7874204 | Method for determining a correction value for the lambda center position in the control of an internal combustion engine In a method for determining a correction value λk for the lambda center position λm which is specified in the control of the air/fuel ratio which is force-modulated between a first lean lambda value λ1 and a second rich lambda value λ2 and supplied... | 01/25/2011 |
| 7836758 | Deterioration diagnosis system for an air-fuel ratio sensor A deterioration diagnosis system for an air fuel sensor mounted to an exhaust pipe of an internal combustion engine. The air fuel sensor determines a mixture ratio of air and fuel fed into the internal combustion engine. In the system, an inclination of an output si... | 11/23/2010 |
| 7802463 | Sensor control device and air fuel ratio detecting apparatus A gas sensor apparatus 3 in an air-fuel ratio detection system 1 includes a gas sensor element 4 which outputs a detection signal corresponding to air-fuel ratio, and a gas sensor control circuit 2 which includes a detection section 20... | 09/28/2010 |
| 7779669 | Diagnostic method and apparatus for gas sensor A gas sensor diagnostic method includes the steps of counting the reversal number of times that a target air-fuel ratio for an air-fuel mixture to be supplied to an internal combustion engine reverses from a rich side to a lean side or from the lean side to the rich... | 08/24/2010 |
| 7721591 | Abnormality diagnosis apparatus for internal combustion engine A cylinder deviation of an actual air-fuel ratio before an air-fuel-ratio dither control is obtained based on a variation of an actual air-fuel ratio by the dither control, a variation amount of detected air-fuel ratio, and a cylinder deviation of detected air-fuel ... | 05/25/2010 |
| 7484401 | Gas sensor A gas sensor having an elastic insulating member including a longitudinal hole for receiving an air permeability filter assembly and a passage portion communications between the longitudinal hole and an outer side thereof. ... | 02/03/2009 |
| 7481094 | Gas sensor control unit A gas sensor control unit (1) including a single signal-switching and outputting circuit (33) adapted for switching and outputting plural signals transmitted from plural gas sensors (8,9). ... | 01/27/2009 |
| 7434449 | Exhaust gas analyzer An SOF measuring system that can continuously measure SOF and a soot measuring system that can continuously measure soot are connected with an exhaust gas line. The soot measuring system comprises a diluter that selectively dilutes either one of the exhaust gas and ... | 10/14/2008 |
| 7416649 | Oxygen concentration detection system and vehicle control system having the same An oxygen concentration detection system including an oxygen sensor which outputs a plurality of types of measurement signals and anomaly detection means and modification means. The anomaly detection means detects a sensor anomaly by determining whether the respecti... | 08/26/2008 |
| 7415343 | Engine controller Respective positive terminal electric potentials of exhaust gas sensors are sequentially selectively inputted to an analog input terminal of a multi-channel AD converter through a multiplexer. An offset voltage is applied to respective negative terminals of the exha... | 08/19/2008 |
| 7404881 | Gas sensor A gas sensor is described for detecting a physical property of a measuring gas, including detecting the oxygen concentration in the measuring gas. The gas sensor includes a sensor element having a diffusion barrier, which is arranged between a first solid electrolyt... | 07/29/2008 |
| 7387011 | Deterioration diagnosis system for exhaust gas sensor A diagnosis device calculates a lean-direction responsiveness characteristic and a rich-direction responsiveness characteristic of the exhaust gas sensor. The lean-direction responsiveness represents a responsiveness of the sensor in a case that an air-fuel ratio is... | 06/17/2008 |
| 7340942 | Sensor including a sensor element having electrode terminals spaced apart from a connecting end thereof A sensor having a terminal connection structure in which an elongated sensor element (21) is inserted, from its rear end through relative movement, into a metallic-terminal-member retainer. Metallic terminal members (51) are elastically deformed and pr... | 03/11/2008 |
| 7331214 | Method for adapting the detection of a measuring signal of a waste gas probe The invention relates to a waste gas probe which is disposed in an internal combustion engine, comprising a plurality of cylinders and injection valves associated with the cylinders, in order to measure fuel. The waste gas probe is arranged in a waste gas tract and ... | 02/19/2008 |
| 7318339 | Gas sensor unit and sensor cap A gas sensor unit including a gas sensor and a sensor cap. The gas sensor includes a gas detecting element, an electrode provided on the gas detecting element and a sensor terminal connecting to the electrode for transmitting an output signal from the gas detecting ... | 01/15/2008 |
| 7319928 | Method for real time determination of the mass of particles in a particle filter of a motor vehicle A method for real-time determination of the mass of particles in a particle filter fitted to the exhaust line of an internal combustion engine. The following data—temperature T(t) of the exhaust gas at the filter input, oxygen [O2 (t)] and nitrogen oxid... | 01/15/2008 |
| 7310991 | Explosion-proof gas sensor An explosion-proof gas sensor has a measuring element (2), which generates a measured signal that depends on the concentration of the measured gas and is delimited against the environment by means of a porous, gas-permeable and sintered metal body (7).... | 12/25/2007 |
| 7306708 | Limiting current type oxygen sensor In a limiting current type oxygen sensor, a plane cathode layer and a plane anode layer are arranged on both sides of a solid electrolyte layer, and a porous diffusion layer for controlling gaseous diffusion rate is arranged on the other side of the cathode layer. A... | 12/11/2007 |
| 7299689 | Process and device for determining the internal temperature of a catalytic converter of a vehicle equipped with a heat engine The present invention pertains to a process for determining the internal temperature of a catalytic converter of a vehicle equipped with a heat engine. According to the present invention, such a process is characterized in that this temperature is determined by calc... | 11/27/2007 |
| 7297240 | Oxygen sensor deterioration detection apparatus A deterioration detection apparatus for an oxygen sensor is able to detect an abnormality of the oxygen sensor constantly with high precision, without being affected by the temperature characteristic of the element impedance. The apparatus applies a voltage V to the... | 11/20/2007 |
| 7286926 | Apparatus and method for detecting deterioration of exhaust gas sensor A deterioration detecting apparatus for an exhaust gas sensor of an internal combustion engine, the exhaust gas sensor including a sensor element and a heater that heats the sensor element, computes a first sensor characteristic parameter, which is related to a char... | 10/23/2007 |
| 7285204 | Apparatus for detecting deterioration of air-fuel ratio sensor In detecting a deterioration of an air-fuel ratio sensor, a sensor output change speed integrated value is calculated when an element temperature of a solid electrolyte is stabilized at a low temperature. Successively, a sensor output change speed integrated value i... | 10/23/2007 |
| 7278414 | Diagnostic tool for sensing oxygen sensor heater operation A diagnostic testing system for a vehicle comprising an oxygen sensor having a heating element for heating the oxygen sensor to its minimum operational temperature, an analyzer having a user interface, a communications link between the analyzer and the vehicle to ob... | 10/09/2007 |
| 7266942 | Diagnostic device and method of engine exhaust purifying system A diagnostic device and method of an engine exhaust purifying system, which perform active control of an air-fuel ratio and can make diagnosis of air-fuel ratio sensors, catalysts, etc. in the engine exhaust purifying system with high accuracy and reliability while ... | 09/11/2007 |
| 7260979 | Oxygen sensor An oxygen sensor includes a sensor element, a holder having a hole through which the sensor element is arranged, a sealing positioning portion for sealing a clearance between the sensor element and the holder and positioning the sensor element in the holder and bein... | 08/28/2007 |
| 7258771 | Air/fuel ratio detection apparatus The invention relates to an air/fuel ratio detection apparatus. This apparatus includes (a) a heater portion having an elongate cylindrical shape and heating by applying electricity thereto from outside; (b) a solid electrolyte layer surrounding the heater portion a... | 08/21/2007 |
| 7258772 | Oxygen sensor and method of manufacturing same In an oxygen sensor that measures a limiting current of when a voltage is applied between pumping electrodes, and also performs a rich/lean judgment based on an electromotive force generated between one of the pumping electrodes and a reference electrode, an oxygen ... | 08/21/2007 |
| 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 |
| 7251536 | Control system for plant A control system for a plant is disclosed. The control system includes a controller for controlling the plant based on a controlled object model which is obtained by modeling the plant. The controlled object model is modeled using an input and an output of the plant... | 07/31/2007 |
| 7243644 | Apparatus for estimating air-fuel ratios and apparatus for controlling air-fuel ratios of individual cylinders in internal combustion engine An individual-cylinder air-fuel ratio estimation model is designed so as to consider the mixing of gases exhausted from adjacent combustion cylinders, and a movement by which a mixed gas arrives at the position of an air-fuel ratio sensor, in order that influences a... | 07/17/2007 |
| 7231808 | Method and apparatus for measuring oxygen content A method and apparatus for measuring the oxygen content in a closed target space, particularly for monitoring inertization levels in an inert gas device for fire prevention and/or fire extinguishing. Toward the aim of proposing a method for measuring the oxygen cont... | 06/19/2007 |
| 7231265 | Control system for plant A control system for a plant is disclosed. The control system includes a controller which controls the plant based on a controlled object model which is obtained by modeling the plant. The controlled object model is modeled using an input and an output of the plant ... | 06/12/2007 |
| 7210331 | Detecting element for determining the concentration of a gas component in a measuring gas, and method for manufacturing the detecting element A detecting element is described, in particular a gas sensor for detecting the concentration of a gas component in a measuring gas, including a sensor element which is exposable to the measuring gas and has a connecting end section which is contacted by connecting c... | 05/01/2007 |
| 7210455 | Engine control with fuel quality sensor A system is described using a fuel quality sensor for controlling various aspects of engine operation. In particular, an acoustic wave sensor is utilized to measure viscosity and density of gasoline fuels. This measurement is utilized to predict engine combustion qu... | 05/01/2007 |
