摘要:
Die Erfindung betrifft ein Verfahren zur Regelung eines Verbrennungsmotors, insbesondere eines Dieselmotors. Bei dem Verfahren wird eine Folge von Meßwerten bestimmt, die eine Vorverbrennung beschreibt, welche durch eine vor einer Haupteinspritzung stattfindenden Voreinspritzung verursacht ist. Anschließend wird die Folge von Meßwerten ausgewertet und auf Grundlage der Auswertung zumindest einer der Einspritzparameter der nachfolgenden Voreinspritzung entsprechend nachgeregelt.
摘要:
On se préoccupe d'améliorer la réponse d'un moteur diesel aux régimes transitoires d'accélération en accroissant la quantité d'injection de carburant momentanément au-delà des limites autorisées pour le couple moteur et la protection de fumées (36, 37 : qoc, qof). Des débits supplémentaires d'injection de carburant (41, 42 : Δqc, Δqf) sont calculés et ajoutés (45, 46) aux limites normales. Toutefois, ces débits supplémentaires sont modérés par des facteurs (Kfi, Ke, Kfr) tenant compte de paramètres de fiabilité du fonctionnement, qui peuvent être des températures, pressions, etc. et aussi des durées de régimes transitoires et de fréquence de ces régimes. Les facteurs modérateurs permettent d'envisager des débits supplémentaires plus importants en sachant qu'ils seront réduits automatiquement aux approches de fonctionnements extrêmes du moteur.
摘要:
A method for the desulphurisation of an oxidation catalyst (8), arranged in the exhaust line of a diesel internal combustion engine (1), is disclosed, whereby the diesel internal combustion engine (1) is operated at a lambda value μ1 of ca. 0.98 to 0.99 and an exhaust gas temperature T1 of at least 350 °C. The oxidative capacity of the oxidation catalyst impaired by sulphur is thus regenerated within a short period and at moderate exhaust temperatures. Diesel internal combustion engines can thus, at least temporarily, be operated using sulphur containing fuel.
摘要:
A premixed-charge compression-ignition engine and control system (10) is provided which effectively initiates combustion by compression-ignition and maintains stable combustion while achieving extremely low oxides of nitrogen emissions, good overall efficiency and acceptable combustion noise and cylinder pressures. The present engine and control system (10) effectively control the combustion history, that is, the time at which combustion occurs, the rate of combustion, the duration of combustion and/or the completeness of combustion, by controlling the operation of certain control variables providing temperature control, pressure control, control of the mixture's autoignition properties and equivalence ratio control. The combustion control system (10) provide active feedback control of the combustion event and includes a sensor, e.g. pressure sensor (16), for detecting an engine operating condition indicative of the combustion history, e.g. the start of combustion, and generating an associated engine operation condition signal (18).
摘要:
A method of controlling the fuelling rate of a compression ignition engine having an exhaust gas recirculation system (EGR) (12) and a turbocharger (14). The method includes the steps of predicting the exhaust gas air/fuel ratio as a function engine operating characteristics and the operator-requested fuelling rate. This value is compared to an air/fuel limit value stored in a table of values indexed by engine operating characteristics. The air/fuel limit is the value below which visible smoke occurs. The predicted air/fuel ratio is compared to the air/fuel ratio limit and either (1) the fuel is delivered at the requested rate, (2) the start of injection timing is modified and the fuel is delivered at the requested rate or (3) the fuelling rate is limited as a function of the requested fuelling rate and measured or determined engine operating parameters.
摘要:
A method for comprehensive integrated control of an internal combustion engine, such as a compression-ignition engine, utilizing an electronic control module (20) is disclosed. The control strategy integrates various functions of engine control including an acceleration balance test for the engine cylinders, a fuel economy vehicle speed limit adder, a fuelling limit for high altitude vehicle operation, throttle logic, a data-hub for operation trending and vehicle component lifting analyses, a gear ratio torque limit, an air temperature based torque limit, enhanced cooling fan control, and a idle shutdown strategy based on ambient air temperature.