摘要:
Dispositif de régulation de l'alimentation en air d'un moteur à combustion interne suralimenté par un ensemble turbo-compresseur entraîné en rotation par les gaz d'échappement du moteur. L'admission (15, 34) du compresseur rotatif (13) est contrôlée par un système de vannage d'entrée (32, 33) apte à réduire l'effet de compression du rotor (7) du compresseur (13), la commande (36) de ce vannage (32, 33) étant couplée avec celle du levier d'accélérateur (29) pour fermer le vannage et réduire au maximum l'effet de compression lorsque le levier (29) se déplace vers la position de ralenti du moteur. Application à la régulation de la vitesse du rotor d'un turbo-compresseur, en particulier au cours de la marche au ralenti du moteur et au moment des reprises d'accélération.
摘要:
Throttle loss recovery (TLR) systems for a spark-ignition engine are described having a turbine (either variable or non-variable) that expands incoming engine air and drives an electrical generator. A bypass passage and bypass valve can allow air to bypass the turbine under certain operating conditions. Control algorithms are employed for controlling the generator load and the valving of the TLR system, such that the generator serves an electrical load only when it is efficient to do so, in particular, only when the generator speed is above a predetermined minimum speed threshold. The control methods also aim to prevent any overspeed excursions of the turbine/generator assembly. In some embodiments there is also a series throttle valve arranged upstream or downstream of the turbine. The control methods include various algorithms for controlling the bypass valve, the VNT (when present), and the throttle valve (when present) under various engine operating conditions and scenarios.
摘要:
Method for operating a quantity-regulated internal combustion engine (1), having an intake system (2) and an exhaust train (3), wherein an expansion machine (4) is arranged in the intake system (2), upstream of an inlet valve of the internal combustion engine (1) in the direction of flow of combustion air, the output shaft (4') of which expansion machine (4) can be coupled to an output shaft (V) of the internal combustion engine (1), wherein a heat exchanger (5) which can be arranged on the exhaust train (3) is provided, and wherein combustion air is heated in the heat exchanger (5) by exhaust gas of the internal combustion engine (1) before said combustion air flows through the expansion machine (4). The method according to the invention brings about a significant improvement in the efficiency of an internal combustion engine with quantity-regulated load control in the partial load mode.
摘要:
The invention relates to an air-inlet system (10), and relates to an air-conditioning system (100, 101 ) and an internal combustion engine (200) comprising the air-inlet system. The air-inlet system comprises an air intake port (20), an air output port (30) and a turbine (40) for controlling air mass flow into a combustion chamber (202) of an internal combustion engine. The turbine is provided with a propeller hub (42) which comprises at least one blade (44). The propeller hub is arranged between the air intake port and the air output port for propelling the blade of the turbine. The turbine has an air-flow resistance for determining the air mass flow into the combustion chamber. The effect of the air-inlet system according to the invention is that the use of a turbine enables to use at least some of the pressure drop across the turbine to drive the blade of the turbine for generating rotational energy.
摘要:
A power system including a stoichiometric compression ignition engine (10) in which a roots blower is positioned in the air intake (12) for the engine (10) to control air flow. Air flow is decreased during part power conditions to maintain the a ir-fuel ratio in the combustion chamber of the engine (10) at stoichiometric, thus enabling the use of inexpensive three-way catalyst to reduce oxides of nitrogen. The roots blower is connected to a motor generator (34) so that when air flow is reduced, electrical energy is stored which is made available either to the roots blower to temporarily increase air flow or to the system electrical load (40) and thus recapture energy that would otherwise be lost in reducing air flow.
摘要:
Die Erfindung betrifft ein Verfahren zum Betrieb einer Dieselbrennkraftmaschine (10) mit einer Druckluftquelle und einem Dieselpartikelfilter (31), welcher im Abgastrakt angeordnet ist. Die Dieselbrennkraftmaschine (10) weist weiterhin ein Leitungssystem für Sekundärluft auf, wobei die Sekundärluft über einen Sekundärluftverdichter (27) in den Abgastrakt der Brennkraftmaschine (10) geleitet wird. Die Druckluftquelle wird zum Antrieb des Sekundärluftverdichters (27) genutzt.
摘要:
Described is a secondary-air system for an internal-combustion engine (32). The system includes at least one line (14) through which air is blown into the exhaust pipe of the engine, a pump (26) and a drive (27) for the pump (26). Also fitted is an air-feed line (13) through which the secondary air is supplied to the pump (26). The power necessary to drive the pump is provided by the engine (32).