摘要:
The invention relates to a method for controlling injection of a reductant into a NOx containing exhaust gas stream from a combustion engine, where combustion of a known fuel takes place and where the NOx is reduced by selective catalytic reduction, SCR, in the presence of a SCR catalyst, comprising establishing signals related to exhaust gas flow, HOx concentration in the exhaust gas stream upstream of the catalyst, exhaust gas temperature upstream of the SCR catalyst, exhaust gas temperature downstream of the SCR catalyst and to input data for catalyst characteristics. From the signals an adjusted amount of the reductant is calculated by using a calculated amount of reductant and a value d(E*T)/dt, where E is the exhaust gas flow, T is the exhaust gas temperature upstream of the catalyst and t is time.
摘要翻译:本发明涉及一种用于控制将还原剂注入含有来自内燃机的含NO x的废气流的方法,其中发生已知燃料的燃烧,其中NO x 在SCR催化剂的存在下,通过选择性催化还原SCR来还原SUB,其包括在催化剂上游的排气流中建立与废气流,HO x x H浓度相关的信号,排气 SCR催化剂上游的温度,SCR催化剂下游的排气温度和输入催化剂特性的数据。 根据该信号,通过使用计算量的还原剂和d(E * T)/ dt计算还原剂的调整量,其中E是排气流量,T是催化剂上游的排气温度,t 是时候了
摘要:
A system and method for removing NOx from an emission control device is provided. The emission control device is coupled adjacent and downstream of an oxidation catalyst. The method includes adding a reductant to the exhaust gases flowing into the oxidation catalyst. The method further includes partially oxidizing the reductant in the oxidation catalyst to transition a remaining portion of the reductant into a vapor phase. Finally, the method includes oxidizing the remaining portion of the reductant in the emission control device to remove NOx from the device.
摘要:
The invention relates to a method and an associated apparatus for metering a quantity of a reducing agent introduced into the exhaust-gas or exhaust-air stream of a combustion installation, in particular an internal combustion engine, for the reduction of pollutants. The quantity of the reducing agent to be introduced is determined by way of a functional relationship. The functional relationship is determined from operation-relevant parameters of the combustion installation, the exhaust gas and, if appropriate, of a catalytic converter. The functional relationship is checked during the operation of the combustion installation and adapted to the current state and the current operating conditions of the combustion installation, the exhaust gas and, if appropriate, the catalytic converter.
摘要:
A control system for use in a fluid flow application includes a heater and a control device. The heater has at least one resistive heating element and the heater is operable to heat fluid. The control device determines at least one flow characteristic of a fluid flow based on a heat loss of the at least one resistive heating element and determines a mass flow rate of the fluid based on the at least one flow characteristic and a property of the at least one resistive heating element. And the property of the at least one resistive heating element includes a change in resistance of the at least one resistive heating element under a given heat flux density.
摘要:
It is described a method to control the amount of particulate coming out of a particulate filter for an internal combustion engine comprising: estimating an objective value of the amount of particulate coming out of the particulate filter; determining an amount of particulate trapped in the particular filter, which allows reaching said objective value of the amount of particulate coming out of the particulate filter; and adjusting an amount of particulate produced by the internal combustion engine and/or an amount of particulate burnt in the particulate filter based on said amount of trapped particulate.
摘要:
There is provided an exhaust device of a straddle-type vehicle. A first muffler body is arranged at one side, at which a drive chain is not arranged, in a region at the rear of a chamber. A second muffler body is arranged at another side, at which the drive chain is arranged. A first connection pipe interconnects the chamber and the first muffler body. A second connection pipe interconnects the chamber and the second muffler body. An exhaust control valve is configured to control a flow rate of exhaust air to circulate from an exhaust port toward the first muffler body via an exhaust pipe, the chamber and the first connection pipe. A part or all of the second connection pipe is formed to have a pipe shape by two or more plate materials, and has a non-true circular cross-sectional surface shape.
摘要:
A thermal-type flowmeter includes a chip package. The chip package is formed through encapsulation with a resin of a sensor element, a drive circuit, a metal lead frame adapted to have mounted thereon the sensor element and the drive circuit, and a temperature detecting element. The chip package has an exposed structure in which a surface of the sensor element having the diaphragm is exposed. The temperature detecting element is mounted on the lead frame via an electrically conductive member.
摘要:
A thermal-type flowmeter includes a chip package. The chip package is formed through encapsulation with a resin of a sensor element, a drive circuit, a metal lead frame adapted to have mounted thereon the sensor element and the drive circuit, and a temperature detecting element. The chip package has an exposed structure in which a surface of the sensor element having the diaphragm is exposed. The temperature detecting element is mounted on the lead frame via an electrically conductive member.
摘要:
An exhaust gas treatment system for an internal combustion engine includes an exhaust gas pathway configured to receive exhaust gas from the internal combustion engine, a first ammonia injector configured to inject ammonia into the exhaust gas pathway at a first rate, and a first treatment element positioned downstream of the first ammonia injector. A second ammonia injector is positioned downstream of the first treatment element. The second ammonia injector is configured to inject ammonia into the exhaust gas pathway at a second rate. A controller is configured to estimate an amount of particulate present in the exhaust gas and adjust at least one of the first rate or the second rate based on the estimate.
摘要:
An apparatus for controlling a total emissions amount from a facility includes an emissions module structured to interpret data indicative of an emissions amount from a test cell system in the facility; an emissions threshold module structured to aggregate the emissions amount from each test cell system in the facility to determine a total emissions amount for the facility and compare the total emissions amount to a predetermined threshold for the facility; and an aftertreatment system control module structured to selectively control a component in an aftertreatment system associated with each test cell system responsive to the comparison of the total emissions amount to the predetermined threshold.