摘要:
Abgasanlage für eine Brennkraftmaschine, in der in Strömungsrichtung eines Abgases der Brennkraftmaschine eine erste Abgasreinigungsvorrichtung und eine zweite Abgasreinigungsvorrichtung angeordnet sind, wobei die Anströmung der ersten Abgasreinigungsvorrichtung über einen ersten Anströmtrichter erfolgt, wobei die Anströmung der zweiten Abgasreinigungsvorrichtung über einen zweiten Anströmtrichter erfolgt, wobei eine Mittelachse des ersten (A) und des zweiten (B) Anströmtrichters mit einer in Strömungsrichtung vorne liegenden Stirnfläche der ersten und der zweiten Abgasreinigungsvorrichtung einen Winkel α kleiner 90° bildet. Durch die erfindungsgemäße Ausgestaltung wird eine äußerst kompakte Baueinheit für die Abgasanlage mit geringstem Abgasgegendruck bei gleichzeitig optimierter Anströmung der Abgasreinigungsvorrichtungen geschaffen.
摘要:
A hydrocarbons removal system and methods and uses thereof are described. The hydrocarbons removal system can comprise at least one sulfur trap and an oxidation catalyst.
摘要:
An exhaust purification system including a NOx catalyst 32 provided in an exhaust passage of an internal combustion engine 10 and purifying NOx in exhaust; a MAF sensor 40 for acquiring an air flow-rate of the internal-combustion engine 10; a control unit 60, 70 that execute catalyst regeneration treatment of recovering a NOx purification ability of the NOx catalyst 32 by performing, in combination, air-based control of reducing air flow-rate of the internal-combustion engine 10 to a predetermined target air flow-rate and injection-based control of increasing a fuel injection amount, wherein, in a case of executing the catalyst regeneration treatment, the control unit 60, 70 starts with the air-based control and starts the injection-based control when the air flow-rate acquired by the MAF sensor 40 is reduced to the target air flow-rate.
摘要:
Provided is an exhaust purification system including: an NOx reduction type catalyst (32); an MAF sensor (40); an SOx purge control unit (60) that uses in combination both of an air system control in which an intake air amount is feedback-controlled based on a target intake air amount and an injection system control in which a target injection increase amount is set based on the target intake air amount and a fuel injection amount is feedback-controlled based on the target injection increase amount; an SOx purge prohibition processing unit (53) that prohibits an SOx purge control; and a warming mode control unit (55) that open-loop controls an air system during a period in which the SOx purge control is prohibited, controls the fuel injection amount, and maintains the exhaust gas at a predetermined temperature. The SOx purge control unit (60) executes the injection system control by switching the target intake air amount into an actual intake air amount when starting the SOx purge control after a warming mode control is ended.
摘要:
An exhaust gas control apparatus for an engine (1) is provided with a urea water supply mechanism (200) adding urea water to exhaust gas, a SCR catalyst (41) adsorbing ammonia and removing NOx by using the adsorbed ammonia, and a control device (80) controlling a urea water addition amount based on a target adsorption amount for the ammonia adsorbed onto the SCR catalyst. The control device executes a first processing for acquiring a parameter correlated to the time period during which the temperature (THEH) of the SCR catalyst is equal to or higher than a threshold (DT) and an initialization processing for decreasing the amount of the ammonia adsorbed on the SCR catalyst on a condition that said parameter acquired in the first processing is equal to or higher than a predetermined value (HS1).
摘要:
The invention relates to a method for diagnosing (200) a nitrogen oxide trap associated with an internal combustion engine, said trap being capable of reducing the nitrogen oxides stored therein by reacting with fuel from the engine during a step (120, 130) of regenerating the trap, said regeneration step (120, 130) being initiated by switching the engine setting to rich mix, in which the torque of the engine results from the injection of at least one main amount of fuel, and the fuel for reducing the nitrogen oxides results from the injection of a secondary amount of fuel, said method comprising a step of determining (230) the mass of reducing agents (M red ) consumed during a regeneration step, and a step (240) of comparing said mass (M red ) with a fault threshold (S) below which it is established that the trap is faulty.
摘要:
A method of decomposing NO2 to NO in an exhaust gas of a lean-bum internal combustion engine comprises the steps of contacting an acidic metal oxide selected from the group consisting of zeolites, tungsten-doped titania, silica-titania, zirconia-titania, and mixtures of any two or more thereof with a gas mixture comprising the exhaust gas, adjusting the composition of the gas mixture, by injecting hydrocarbon therein at a rate that changes over the course of a duty cycle so that, on average over the duty cycle, the C1 hydrocarbon:nitrogen oxides ratio of the gas mixture contacting the acidic metal oxide is from 0.1 to 2.0 and passing the effluent gas directly to atmosphere optionally via first contacting the gas mixture with a hydrocarbon oxidation catalyst.