A sensing assembly comprises a sensor housing having a sensing end and a coupling end opposite the sensing end. A sensing element and a heating element are disposed within the sensor housing. A tip cover and coupling end cover removably coupled to the ends of the sensor housing. The tip cover and coupling end cover are configured to be uncoupled from the sensor housing to enable removal of at least one of the sensing element, the heating element, or an integrated sensing/heating element from the sensor housing, and replacement with at least one of a new sensing element or a new heating element, the tip cover and coupling end cover configured to be recoupled to the sensor housing after at least one of the new sensing element or the new heating element is disposed in the sensor housing.

Methods comprising: arranging a binary lambda sensor and a second sensor downstream of a catalytic converter; when the engine is run for the first time, using an initial lambda setpoint for closed-loop control; measuring the NH.sub.3 value in the exhaust gas; simultaneously measuring the signal from the binary lambda sensor; if the NH.sub.3 value lies above a first threshold value, reducing the lambda setpoint value of the binary lambda signal until the NH.sub.3 value lies below the first threshold value or the binary sensor signal lies below a second threshold value; recording the corresponding binary sensor signal when the NH.sub.3 value passes the first threshold value, for binary sensor signal setpoint value adaptation, as V.sub.binary-left; and calculating the real lambda setpoint value.

A marine engine includes a cylinder block having first and second banks of cylinders disposed along a longitudinal axis and extending transversely relative to each other in a V-shape so as to define a valley there between, and first and second exhaust logs in which exhaust gas from the first and second banks of cylinders are collected and conveyed. An exhaust manifold is located in the V-shape and configured to merge said exhaust gases from the first and second exhaust logs and to convey said exhaust gases. The exhaust manifold has a first inlet port that receives substantially all said exhaust gas from the first exhaust log and a second exhaust inlet port that receives substantially all said exhaust gas from the second exhaust log. The first and second inlet ports are longitudinally offset relative to each other.

An exhaust gas aftertreatment system includes a first sensor configured to measure a parameter and a second sensor disposed proximate the first sensor and configured to measure the parameter. The system includes a controller configured to initially utilize the first sensor as a primary sensor. At target intervals, the controller is configured to receive a first sensor value from the first sensor and receive a second sensor value from the second sensor. The controller is configured to calculate a difference between the first sensor value and the second sensor value and determine if the difference between the first sensor value and the second sensor value is greater than a threshold value. If the difference between the first and second sensor values is greater than the threshold value, the controller is configured to stop utilizing the first sensor as the primary sensor and utilize the second sensor as the primary sensor.

A gas sensor includes a housing including a locking step part, a sensor body including a locked part locked to the locking step part, a sealing member filled between an inner periphery of the housing and an outer periphery of the sensor body on a base end side of the locked part, an insulating member disposed on the base end side of the sealing member, and a circular disc spring pressing a base end surface of the insulating member. The housing includes a caulking part caulking the circular disc spring to cover the circular disc spring. The elastically compressed circular disc spring is disposed between the caulking part and the insulating member. At least part of a base end side pressing part, at which the caulking part presses the circular disc spring, is disposed between an inner and outer periphery edges of the base end surface of the insulating member.

An attachment structure for an exhaust gas sensor, wherein an exhaust gas sensor is attached to a downstream connection pipe part of an exhaust pipe so as to be disposed, in a side view of a motorcycle, in a spatial region between a footrest and a brake pedal provided to the motorcycle.

Methods and systems are provided for an exhaust system. In one example, a method may include determining presence of a zone flow based on a comparison of a first exhaust sensor and a second exhaust sensor. The presence or absence of the zone flow may determine a rate at which an air-fuel ratio is adjusted.

An exhaust gas treatment device includes an exhaust gas line where a combustion exhaust gas discharged from a power generation facility flows through, an exhaust gas line where a second combustion exhaust gas discharged from a second power generation facility flows through, exhaust gas exhaust line disposed by branching off from exhaust gas line, discharging a part of combustion exhaust gases as exhaust combustion exhaust gases, a nitrogen oxide removing unit removing nitrogen oxide contained in an integrated combustion exhaust gas that integrates the combustion exhaust gases, an integrated waste heat recovery boiler recovering waste heat from the integrated combustion exhaust gas, and a CO.sub.2 recovery unit recovering CO.sub.2 contained in the integrated combustion exhaust gas by using CO.sub.2 absorbing liquid.

An exhaust gas treatment device includes an exhaust gas line through which a combustion exhaust gas discharged from a power generation facility flows, a waste heat recovery boiler recovering waste heat of the combustion exhaust gas, a branch exhaust gas line provided to be connected between a front stage and a downstream stage of the waste heat recovery boiler on a main exhaust gas line, a nitrogen oxide removal unit removing nitrogen oxide in an integrated combustion exhaust gas into which a combustion exhaust gas flowing through the main exhaust gas line and a combustion exhaust gas flowing through the branch exhaust gas line are integrated, an integrated waste heat recovery boiler recovering waste heat of the integrated combustion exhaust gas from which nitrogen oxide has been removed, and a CO.sub.2 recovery unit recovering CO.sub.2 in the integrated combustion exhaust gas.

A method and a device for performing diagnostics on an exhaust gas sensor includes a series circuit of a Nernst cell and a first other cell. The exhaust gas sensor has a first, a second, and a third connection where a voltage drop can be measured between the first connection and the second connection by the Nernst cell and a voltage drop between the second connection and the third connection can be measured by the first other cell. The diagnostic method has steps for feeding a direct or alternating current into the first, second, and third connections; for directly or indirectly sensing an electrical voltage potential at at least one of the first, second, and third connections; and for evaluating the voltage potential sensed to diagnose a short circuit or an open circuit in the Nernst cell and/or in the first other cell.