摘要:
A method and apparatus for detecting an abnormality of a nitrogen oxide purifying catalyst using an NOx sensor, the method including: calculating a detection integrated value by integrating corresponding values corresponding to the NOx sensor output signal obtained until a first predetermined detection period has elapsed after the NOx sensor begins to generate an output signal and subtracting a variation integrated value. The variation integrated value is calculated by integrating corresponding values obtained until a predetermined second detection period has elapsed after the NOx sensor beings to generate an output signal when driven in a gas atmosphere having a constant nitrogen oxide concentration.
摘要:
[Objective] An object is to provide a sensor control apparatus and a sensor-control-apparatus control method which can reduce variation in startup time among a plurality of times of execution of detection processing, in consideration of variation in output characteristic among a plurality of gas sensors.[Means for Solution] In a sensor control apparatus, before drive control (S55 to S80) is started, preliminary control is executed so as to supply a constant current to a second oxygen pump cell over a constant time, to thereby control to a constant level the amount of oxygen pumped from a second measurement chamber to the outside of the second measurement chamber (S40 to 50). The preliminary control is executed under control conditions of the sensor control apparatus which are determined for each gas sensor and are associated with the amount of oxygen pumped from the second measurement chamber to the outside thereof. The control conditions bring into a target range the concentration correspondence value calculated after start of the drive control which is started after the preliminary control is executed in a state in which a reference gas having a known concentration is introduced into the gas sensor.
摘要:
An apparatus and method for individually detecting NO and NO2 concentrations as NOX components of an object gas. An NO concentration corresponding value is obtained from a first detection element not having a reduction section. An NO concentration corresponding value is obtained from a second detection element having a reduction section, and having an NO2/NO sensitivity ratio greater than that of the first detection element. The difference ΔC between the NO concentration corresponding values of the two detection elements is obtained, and divided by the difference ΔS between the NO2/NO sensitivity ratios of the two detection elements, whereby an NO2 concentration corresponding value is obtained. A value obtained by multiplying the NO2 concentration corresponding value by the NO2/NO sensitivity ratio of the second detection element is subtracted from the NO concentration corresponding value of the second detection element, whereby an NO concentration corresponding value is obtained.
摘要:
A cleaning member for an image forming apparatus, includes a core, a foamed elastic layer disposed by winding a strip-shaped foamed elastic member on an outer peripheral surface of the core in a helical form so as to extend from one end of the core to the other end, and a bonding layer for bonding the core and the foamed elastic layer together, wherein the area of a region within a surface at one or both ends at least in a longitudinal direction of the foamed elastic layer on a side facing the outer peripheral surface of the core, contacting the outer peripheral surface of the core via the bonding layer is substantially 35% or more by area ratio per unit area.
摘要:
A charging unit is provided, the charging unit including: a charging member; and a charging member clean-up member having an elastic layer, the elastic layer containing a silicon oil, wherein a silicone concentration in analyzing the charging member by an x-ray photoelectron spectroscopy satisfies following condition: about 1 atm %≦(difference between the maximum value and the minimum value of the silicone concentration in Si2p detected by the x-ray photoelectron spectroscopy above the charging member)≦about 3 atm %.
摘要:
A charging device includes: a charging component, and a cleaning member for the charging component, containing a substrate and an elastic layer that contains a silicone oil and is arranged in a spiral form on an outer surface of the substrate, the charging device being satisfying a following formula: A≦6 atomic % wherein A is a maximum value of the contents of Si atom constituting a siloxane skeleton with respect to total atoms at a contact part where the charging component is brought into contact with the elastic layer and at a non-contact part where the charging component is not brought into contact with the elastic layer, in which the contents of Si atom are obtained by X-ray photoelectron spectroscopy of a surface of the charging component after preparing the elastic layer of the cleaning member for the charging component in an initial state and the charging component in an initial state to bring into contact with each other for 24 hours.
摘要:
Using a gas detection voltage Vs output from a terminal CU, a determination is made at to whether, after startup of an air-fuel ratio detection apparatus (1), a full-range air-fuel ratio sensor (10) has reached a semi-activated state in which a determination can be made as to whether the air-fuel ratio is on the rich or lean side based on a change in a gas detection signal Vic. After determining that the sensor has reached the semi-activated state, the signal Vic is compared with a threshold to determine whether the air-fuel ratio is on the rich or lean side. In the apparatus (1), the potential difference between an outer pump electrode of a pump cell (14) and a reference electrode of an oxygen concentration measurement cell (24) is obtained via a first differential amplification circuit (53) as the gas detection signal Vic, the signal Vic being highly responsive to a change in air-fuel ratio of exhaust gas.
摘要:
The process for producing a (fluoroalkyl)benzene derivative according to the present invention comprises a step of reducing the total content of group 3 to group 12 transition metals in an alkylbenzene derivative to 500 ppm or less in terms of metal atoms; a step of halogenating the branched alkyl group of the purified alkylbenzene derivative by a photohalogenation to obtain a (haloalkyl)benzene derivative; and a step of subjecting the (haloalkyl)benzene derivative to a halogen-fluorine exchange using HF in an amount of 10 mol or higher per one mole of the (haloalkyl)benzene derivative. The (fluoroalkyl)benzene derivative produced by the process is reduced in the content of impurities such as residual halogens and residual metals, and is useful as intermediates for functional chemical products for use in applications such as medicines and electronic materials.
摘要:
A cleaning member for an image forming apparatus includes a core and an elastic layer that is formed by a strip-shaped elastic member helically wound around an outer peripheral surface of the core. The cleaning member satisfies the following formula (1): 0.7
摘要:
A cleaning member for an image forming apparatus includes a core and an elastic layer helically put on an outer peripheral surface of the core and including a first elastic layer and a second elastic layer, the first elastic layer being an outermost layer and the second elastic layer being located closer to the core than the first elastic layer and having a compression set smaller than that of the first elastic layer.