Patent application number | Description | Published |
20090165440 | Catalyst Deterioration Monitoring System and Catalyst Deterioration Monitoring Method - A storage reduction NOx catalyst is disposed in an exhaust passage for an internal combustion engine. A NOx sensor is disposed upstream of the NOx catalyst. An inflow NOx amount, which is the amount of NOx that has flown into the NOx catalyst, is calculated by accumulating the output of the NOx sensor. A total storage amount, which is the sum of the amounts of oxygen and NOx stored in the NOx catalyst, is calculated based on an output generated by an exhaust gas sensor disposed downstream of the NOx catalyst when rich spike is being executed. The deterioration of the NOx catalyst is determined based on the inflow NOx amount and the total storage amount. | 07-02-2009 |
20090199543 | CATALYST MONITORING SYSTEM AND MONITORING METHOD - A catalyst monitoring system diagnoses deterioration of an NO | 08-13-2009 |
20090320454 | CATALYST MONITORING SYSTEM AND METHOD - A total amount of NOX that flows into an NOX catalyst between the time that air-fuel ratio control ends and the time that the air-fuel ratio control starts the next time, is obtained. A total stored amount, which is the sum of an oxygen stored amount and an stored amount in the NOX catalyst before the air-fuel ratio control started, is calculated based on the amount of reducing agent that has flowed into the NOX catalyst during the air-fuel ratio control. The oxygen stored amount is calculated by extrapolating a relationship between the total amount of NOX and the total stored amount. The relationship is established beforehand by executing the air-fuel ratio control with at least two levels. | 12-31-2009 |
20100054301 | TEMPERATURE SENSOR - The temperature sensor | 03-04-2010 |
20100183046 | TEMPERATURE SENSOR - A temperature sensor including a temperature sensitive device which is disposed in a flow path through which fluid flows and whose electric characteristic changes as a function of temperature of the fluid in the flow path, signal lines connected at top end sides thereof to said temperature sensitive device through electrode wires and at base end sides thereof to lead wires for connection with an external circuit, a sheath member retaining the signal lines therein, and a holding member which holds an outer circumferential surface of said sheath member directly or indirectly through another member. The resonance (primary) frequency at a top end of the temperature sensor against acceleration in a radius direction of the temperature sensor is 480 Hz or less, thereby reducing the transmission of vibration to the top end of the temperature sensor to avoid the breakage of the temperature sensitive device and the disconnection of the electrode wires 502102 even when the temperature sensor resonates. | 07-22-2010 |
20100195698 | TEMPERATURE SENSOR - A protruding length L | 08-05-2010 |
20100289397 | SPARK PLUG FOR INTERNAL-COMBUSTION ENGINE AND METHOD FOR MANUFACTURING THE SAME - A spark plug for an internal-combustion engine comprises an attachment fitting | 11-18-2010 |
20120190266 | METHOD FOR MANUFACTURING SPARK PLUG FOR INTERNAL-COMBUSTION ENGINE - A method of manufacturing a spark plug having an attachment fitting | 07-26-2012 |
20130020670 | TEMPERATURE SENSOR ELEMENT, METHOD FOR MANUFACTURING SAME, AND TEMPERATURE SENSOR - A temperature sensing element includes a thermistor composed of Si-base ceramics and a pair of metal electrodes bonded onto the surfaces of the thermistor. The metal electrodes contain Cr and a metal element α having a Si diffusion coefficient higher than that of Cr. A diffusion layer is formed in a bonding interface between the thermistor and each metal electrode, the diffusion layer including a silicide of the metal element α in a crystal grain boundary of the Si-base ceramics. A temperature sensor including the diffusion layers is provided. Owing to the diffusion layers, the temperature sensor ensures heat resistance and bonding reliability and enables temperature detection with high accuracy in a temperature range, in particular, of from −50° C. to 1050° C. | 01-24-2013 |
20130235904 | TEMPERATURE SENSOR - The temperature sensor includes a thermo-sensitive element, first and second electrode wires electrically connected to the thermo-sensitive element, first and second signal wires partially overlapped with and connected to the first and second electrode wires, respectively. The first and second electrode wires are made of a first metal material consisting primarily of Pt. The first and second signal wires are made of a second metal material containing Al and having a linear thermal expansion coefficient larger than that of the first metal material. Each of an overlap portion of the first electrode wire and the first signal wire and an overlap portion of the second electrode wire and the second signal wire includes a junction part formed by melting and thereafter coagulating the first or second electrode wire and the first or second signal wire. The junction part includes an oxidation film containing Al formed on a surface thereof. | 09-12-2013 |
20140198826 | PAIRED TEMPERATURE SENSOR AND METHOD OF MANUFACTURING THE SAME - A paired temperature sensor includes two temperature sensors having electrical characteristics substantially equivalent at the same temperature range, each of the temperature sensor having a thermosensitive element therein that changes its electrical characteristics according to temperature, and a pair of lead wires, and a single connector | 07-17-2014 |