摘要:
A method for predicting a NOx amount may include detecting an O2 amount in an intake air, calculating a reference O2 amount in the intake air according to a driving condition of an engine, calculating a reference NOx amount contained in an exhaust gas according to the driving condition of the engine, and primarily correcting the reference NOx amount based on the detected O2 amount in the intake air and the reference O2 amount in the intake air according to the driving condition of the engine.
摘要:
A method for predicting regeneration may include calculating total mass flow of reducing agent, calculating mass flow of the reducing agent used in nitrate reduction reaction, mass flow of the reducing agent used in NO2 reduction reaction, and mass flow of the reducing agent which is simply oxidized by using the total mass flow of the reducing agent, calculating mass flow of released NO2 and mass flow of reduced NO2 by using the mass flow of the reducing agent used in the nitrate reduction reaction and the mass flow of the reducing agent used in the NO2 reduction reaction, calculating mass flow of NO2 slipped from DeNOx catalyst, and calculating mass of NO2 and mass of NOx remaining at the DeNOx catalyst after regeneration based on the mass flow of the released NO2, the mass flow of the reduced NO2, and the mass flow of the slipped NO2.
摘要:
The invention relates to a test bed (1) for elevation simulation for a test specimen (11), in particular, for an internal combustion engine (11) with a supply chamber (20) in which a supply system (21) is arranged, a testing chamber (10) structurally separate from the supply chamber (20) for holding the test specimen (11), wherein the testing chamber (10) is in fluid connection with the supply chamber (20) and thus conditioning of the settings for the test specimen (11) to be tested can be achieved.
摘要:
The present invention relates to a method for operating a motor vehicle internal combustion engine having a controller for adjusting NOx emissions in the exhaust gas, wherein a NOx controller is combined with a combustion controller. A control unit of an internal combustion engine is further proposed, said control unit comprising first control means for performing cylinder pressure-based combustion control, and second control means for performing NOx control, wherein the first and second control means are linked to each other.
摘要:
An internal combustion engine with a variable compression ratio is provided. The engine can have a crankshaft that is pivotably supported, a flywheel fixed on the crankshaft, and a connection shaft that is arranged between the crankshaft and an input shaft of a shift transmission.
摘要:
In order to improve a combustion process of a motor vehicle, in particular with regard to emissions and/or the development of noise, a method for regulating an injection profile is provided, in which method a fuel is injected directly into a combustion chamber, wherein the regulation brings about a change in the injection profile (23) at least during a first work cycle on the basis of at least one parameter which is recorded during the first work cycle. Furthermore, a corresponding direct-injection internal combustion engine is provided.
摘要:
The present invention relates to an internal combustion engine (1) with an SCR catalytic converter (11) and with a condition monitor (10) of the NH3 level of the SCR catalytic converter, wherein the condition monitor is connected to a first (14) and a second detecting module (15), each of which determines the NH3 level in a different way. In addition, a method for the determination of the NH3 level of an SCR catalytic converter is claimed.
摘要:
An internal combustion engine according to the invention comprises at least one cylinder and at least one valve provided for a gas exchange and having a first end comprising a valve head, and a second end, characterized in that a valve bearing has a length of a guidance area arranged for the guidance of a valve stem of at most 25%, preferably between 10 and 20%, and particularly preferably of less than 10% of a valve length.
摘要:
The invention relates to a method for operating a motor vehicle exhaust-gas aftertreatment system (1), in which oxygen is fed to and removed from the oxygen tank (8) of an exhaust-gas aftertreatment component (7). According to the invention, the oxygen quantity in the oxygen tank (8) is determined and a rich-lean cycle is influenced in accordance with the determined oxygen quantity. The invention also relates to a motor vehicle exhaust-gas aftertreatment system (1), which permits a temperature regulation of the oxygen tank (8) and/or an uninterrupted desulphation during the transition between a rich operation and a lean operation.