CH653411A5

CH653411A5 - Method for the supercharging of internal combustion engines

Info

Publication number: CH653411A5
Application number: CH3505/81A
Authority: CH
Inventors: Ivo Schumacher
Original assignee: Ivo Schumacher
Priority date: 1981-05-29
Filing date: 1981-05-29
Publication date: 1985-12-31

Abstract

Since supercharged internal combustion engines frequently cannot be supplied with sufficient air in the lower speed range, the exhaust gas energy is used to drive a gas turbine (3), which in turn generates current. The generated current is used either directly to drive the compressor (8) or partially stored in an accumulator (6). The advantage is to be seen on the one hand in utilisation of the exhaust gas energy and on the other in an optimum air supply at all times even in the lower speed range. <IMAGE>

Description

       

  
 

**WARNUNG** Anfang DESC Feld konnte Ende CLMS uberlappen **.

 



   PATENTANSPRÜCHE
1. Verfahren zum Aufladen von Verbrennungskraftmaschinen, dadurch gekennzeichnet, dass mit dem unter Druck stehenden Abgas eine Abgasturbine (3) betrieben wird, die ihrerseits einen Stromgenerator antreibt, und mit dem erzeugten Strom der Motor des Verdichters (8) angetrieben wird.



   2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass wenigstens ein Teil des erzeugten Stromes in einem Akkumulator (6) gespeichert wird.



   Die Erfindung betrifft ein Verfahren zum Aufladen von Verbrennungskraftmaschinen.



   Verbrennungskraftmaschinen, die bei ungenügender Luftversorgung durch einen Turbolader mit Hilfsluft versorgt werden, sind bekannt. Aus der CH-PS   616207    ist ein Verfahren bekannt, bei welchem zur Verbesserung der Luftversorgung im Teillast- und Beschleunigungsbereich die Zufuhr von Hilfsluft über einen Injektor, der seinerseits an einen Druckluftbehälter angeschlossen ist, erfolgt. Im Vollastbetrieb ist die Abgassammelleitung mit einer Abgasturbine verbunden. Auf derselben Welle ist ein Verdichter angeschlossen, der Luft aus der Atmosphäre verdichtet und den Verbrennungszylindern zuführt.



   Nachteil des bekannten Systems ist der Druckluftbehälter, welcher selbst mittels eines Kompressors aufgeladen werden muss und zusätzlich ein kompliziertes Steuersystem erfordert.



   Aufgabe der Erfindung ist es, ein Verfahren zu schaffen, welches die Verbesserung des Wirkungsgrades von Verbrennungsmotoren durch Ausnutzung der in den Auspuffgasen enthaltenen Energie ermöglicht.



   Diese Aufgabe wird durch die im kennzeichnenden Teil des Patentanspruches 1 enthaltenen Merkmale gelöst.



   Die Erfindung soll anhand einer Zeichnung, die ein Schema darstellt, beispielsweise erläutert werden.



   In der einzigen Figur weist ein Verbrennungsmotor 1 eine in der Abgasleitung 2 montierte Abgasturbine 3 auf. Die Abgasturbine 3 ist mit einem Generator 4 gekoppelt. Der Generator 4 gibt die produzierte Elektrizität über einen Regler 5 entweder an einen Akkumulator 6 oder direkt an einen Elektromotor 7 ab. Bei optimalen Betriebsverhältnissen (Elektrizitätsüberschuss) wird gleichzeitig der Elektromotor 7 angetrieben und der Akkumulator 6 aufgeladen.

 

  Während der Beschleunigungsphase oder im Teillastbereich wird der Elektromotor 7, der mit einem Verdichter 8 gekoppelt ist, vom Akkumulator 6 angetrieben. Der Regler 5, eine Mikroprozessor-gesteuerte Schaltung, sorgt aber auch dafür, dass der Akkumulator 6 nie ganz entladen werden kann.



  Durch diese Einrichtung wird der Verbrennungsmotor 1 über die Ladeleitung 9 immer mit der idealen Luftmenge versorgt.



   Der Vorteil der Erfindung ist neben der Energieausnutzung der Auspuffgase darin zu sehen, dass der Motor immer mit der optimalen Luftmenge versorgt werden kann, da auch im unteren Drehzahlbereich, der bisher mit zu wenig Luft versprgt wurde, nun genug Luft zur Verfügung steht, und zwar aus der im Akkumulator gespeicherten Energie. 



  
 

** WARNING ** beginning of DESC field could overlap end of CLMS **.

 



   PATENT CLAIMS
1. A method for charging internal combustion engines, characterized in that an exhaust gas turbine (3) is operated with the exhaust gas under pressure, which in turn drives a power generator, and the motor of the compressor (8) is driven with the generated power.



   2. The method according to claim 1, characterized in that at least part of the current generated is stored in an accumulator (6).



   The invention relates to a method for charging internal combustion engines.



   Internal combustion engines that are supplied with auxiliary air by a turbocharger when there is insufficient air supply are known. From CH-PS 616207 a method is known in which, in order to improve the air supply in the partial load and acceleration range, auxiliary air is supplied via an injector, which in turn is connected to a compressed air tank. In full-load operation, the exhaust manifold is connected to an exhaust gas turbine. A compressor is connected to the same shaft, which compresses air from the atmosphere and feeds it to the combustion cylinders.



   The disadvantage of the known system is the compressed air tank, which itself has to be charged by means of a compressor and additionally requires a complicated control system.



   The object of the invention is to provide a method which enables the efficiency of internal combustion engines to be improved by utilizing the energy contained in the exhaust gases.



   This object is achieved by the features contained in the characterizing part of patent claim 1.



   The invention will be explained, for example, with the aid of a drawing, which represents a diagram.



   In the single figure, an internal combustion engine 1 has an exhaust gas turbine 3 mounted in the exhaust line 2. The exhaust gas turbine 3 is coupled to a generator 4. The generator 4 outputs the electricity produced via a regulator 5 either to an accumulator 6 or directly to an electric motor 7. When the operating conditions are optimal (excess electricity), the electric motor 7 is simultaneously driven and the battery 6 is charged.

 

  During the acceleration phase or in the partial load range, the electric motor 7, which is coupled to a compressor 8, is driven by the accumulator 6. The regulator 5, a microprocessor-controlled circuit, also ensures that the accumulator 6 can never be completely discharged.



  With this device, the internal combustion engine 1 is always supplied with the ideal amount of air via the charging line 9.



   The advantage of the invention is to be seen in addition to the energy utilization of the exhaust gases in the fact that the engine can always be supplied with the optimal amount of air, since even in the lower speed range, which was previously blown with too little air, there is now enough air available from the energy stored in the accumulator.

Claims

PATENT CLAIMS 1. A method for charging internal combustion engines, characterized in that an exhaust gas turbine (3) is operated with the exhaust gas under pressure, which in turn drives a power generator, and the motor of the compressor (8) is driven with the generated power.

2. The method according to claim 1, characterized in that at least part of the current generated is stored in an accumulator (6).

The invention relates to a method for charging internal combustion engines.

Internal combustion engines that are supplied with auxiliary air by a turbocharger when there is insufficient air supply are known. From CH-PS 616207 a method is known in which, in order to improve the air supply in the partial load and acceleration range, auxiliary air is supplied via an injector, which in turn is connected to a compressed air tank. In full-load operation, the exhaust manifold is connected to an exhaust gas turbine. A compressor is connected to the same shaft, which compresses air from the atmosphere and feeds it to the combustion cylinders.

The disadvantage of the known system is the compressed air tank, which itself has to be charged by means of a compressor and additionally requires a complicated control system.

The object of the invention is to provide a method which enables the efficiency of internal combustion engines to be improved by utilizing the energy contained in the exhaust gases.

This object is achieved by the features contained in the characterizing part of patent claim 1.

The invention will be explained, for example, with the aid of a drawing, which represents a diagram.

In the single figure, an internal combustion engine 1 has an exhaust gas turbine 3 mounted in the exhaust line 2. The exhaust gas turbine 3 is coupled to a generator 4. The generator 4 outputs the electricity produced via a regulator 5 either to an accumulator 6 or directly to an electric motor 7. When the operating conditions are optimal (excess electricity), the electric motor 7 is simultaneously driven and the battery 6 is charged.

During the acceleration phase or in the partial load range, the electric motor 7, which is coupled to a compressor 8, is driven by the accumulator 6. The regulator 5, a microprocessor-controlled circuit, also ensures that the accumulator 6 can never be completely discharged.

With this device, the internal combustion engine 1 is always supplied with the ideal amount of air via the charging line 9.

The advantage of the invention can be seen in addition to the energy utilization of the exhaust gases in the fact that the engine can always be supplied with the optimal amount of air, since even in the lower speed range, which was previously blown with too little air, enough air is now available from the energy stored in the accumulator. ** WARNING ** End of CLMS field could overlap beginning of DESC **.