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:
A boost system for providing boost pressure to an air intake manifold of an engine includes a supercharger having rotors and a supercharger input shaft, an electric motor/generator, and a planetary gear set. The planetary gear set operates to transfer torque between the supercharger input shaft, the electric motor/generator and a crankshaft of the engine. The boost system can have a compact configuration.
摘要:
A compressor (11) is connected via a clutch (13) to a crankshaft of an internal combustion engine provided with a turbocharger (12). A compressor pre-spin operation is used to reduce the transferred energy and wear when the clutch is engaged. The pre-spin is achieved by controlling the air mass flow over the compressor, wherein the air mass flow over the compressor is controlled by controlling a bypass throttle angle of a bypass throttle (18) provided in a bypass conduit (17) bypassing the compressor.
摘要:
A method of controlling an engine (20) includes manipulating a wastegate (76) to maintain the operation of the turbocharger (24) within an optimum operating range. A combustion air bypass valve (70) is manipulated between an open position and a closed position to create a negative pressure differential across a supercharger (26). The supercharger (26) is sequentially disposed in-line before the turbocharger (24). The negative pressure differential is converted into a torque by the supercharger (26) and transmitted from the supercharger (26) back to the engine (20) to increase the operating efficiency of the engine (20).
摘要:
The invention relates to an air-inlet system (10), and relates to an air-conditioning system (100) 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:
Zum Betreiben des Abgasturboladers bei welchem die Verbrennungsluft über eine Regeleinrichtung (14) ansaugt wird, wobei die Regeleinrichtung (14) drehbare Schaufeln aufweist, die in einem Gehäuse mit minimalem Spiel Kanäle bilden, welche die Luftströmung in einer beliebigen Drallrichtung umlenken und beschleunigen können, wird die Schaufelstellung in Abhängigkeit der Motor- und Turboladerbetriebspunkte geregelt. Für die Regelung werden unterschiedliche, in Abhängigkeit des Motorbetriebsbereichs gewählte Zielgrössen verwendet. Dank der Wahl unterschiedlicher Regelungszielgrössen, kann der Turbolader in jedem Betriebsbereich des Verbrennungsmotors (1) optimal zu dessen Drehmomentsteigerung beitragen. Kompromisse zwischen Höchstleistung auf der einen und Drehmomentstärke im Anfahr- oder Lehrlaufbetrieb auf der anderen Seite müssen damit nicht mehr eingegangen werden.
摘要:
The invention relates to a method and a device for determining the performance of a secondary air-charge assembly for an internal combustion engine. The aim of the invention is to determine the amount of supplied secondary air in the secondary air-charge assembly. To achieve this, the heat generated by the compression of the secondary air is determined by temperature sensors. In so far as the secondary air-charge assembly is powered by a turbine connected in parallel with the throttle valve in the induction tract, the measured temperature value for the compressor can be compared with a reduction in temperature of the induction air behind the turbine. Reliable information concerning the supplied amount of secondary air can thus be determined by simple sensors. This obviates the need for an air-mass sensor, which is expensive to produce and sensitive to contamination.
摘要:
An internal combustion engine is provided with a variable valve train (30, 31) capable of altering opening and closing timings and/or opening amounts of at least one of an intake valve (28) and an exhaust valve (29) of an internal combustion engine. The internal combustion engine is further provided with a negative pressure mechanism (100) that operates using intake pipe negative pressure generated in an intake passage (33, 34, 35) of the internal combustion engine, a throttle valve (39) for adjusting the flow rate of intake air flowing through the intake passage (33, 34, 35), and negative pressure generating means (20) for controlling at least one of the variable valve train (30, 31) and the throttle valve (39) to generate the intake pipe negative pressure, when the intake pipe negative pressure for operation of the negative pressure mechanism (100) is insufficient.
摘要:
Es wird ein Luftsystem 10 für eine Brennkraftmaschine vorgeschlagen, welches eine von einem Druckgefälle in der Ansaugluft angetriebene Turbine 11 und einen durch die Turbine 11 angetriebenen Verdichter 14 aufweist. Die Turbine ist mit einer Turbinenzuleitung 12 und eine Turbinenableitung 13 mit einer Ansaugleitung 20 verbunden. Der Verdichter 14 weist eine Verdichterzuleitung 15 und eine Verdichterableitung 16 auf. Die durch die Turbine 11 erzeugte Kälte wird durch einen Turbinenwärmetauscher 17 und Transportleitungen 27 zur Kühlung von z.B. Öl eingesetzt. Die, durch den Verdichter 14 erzeugte Wärme wird durch einen Verdichterwärmetauscher 18 und den daran angeschlossenen Transportleitungen 27 z.B. zur Erwärmung von Luft genutzt.