FOUR-STROKE INTERNAL COMBUSTION SYSTEM FOR SUPPLYING FUEL WITH CHARGE STRATIFICATION, FUEL FOR AN ENGINE WITH MIXTURE COMPRESSION AND WITH EXTRAORDINARY IGNITION.
Patent Information
- Authority / Receiving Office
- IT · IT
- Patent Type
- Applications
- Current Assignee / Owner
- DR ING H C F PORSCHE AG
- Filing Date
- 1978-10-20
- Publication Date
- 1978-10-20
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing fuel supply systems for four-stroke internal combustion engines with mixture stratification and extraneous ignition require two fuel pumps, leading to high costs and susceptibility to operational disturbances.
A single pump system is used for fuel supply, with direct flow from the tank to the secondary combustion chamber via a pressure reducing valve, reducing costs and enhancing operational reliability.
The system achieves lower costs and improved operational stability with a simpler, less susceptible design compared to traditional systems.
Description
1 .......ί t, ί' 4 / 61911 / βΙ Dear Sir, we are aware of the invention entitled "SXSflMA. US L*ALXUS3fEi2X(»m OF C4BBUB4OTE FOR A MOTOSE A OOMBOSSIOKS XNf ERRI A FIVE TIMES WITH smalliamo»» deliaamai*with compression of the. MIXTURES AND WITH ACCESSION BSmitEA." in the name of Br*Ing*hiC»F* Porsche Aktiengeeellschaft iai Porscheetrassa* 42 Stuttgart-Buffenhauuen (Germany) of German nationality with domicile in I ! jHllano via Dogana 1 at the Agent Office Bro* ί jvetti Xng«......0»- Gregorj .................. deposited on 20 Q ff' C8 β 86 A / 78 *ο··ο—o* The present invention relates to a fuel supply system for a four-stroke internal combustion engine with fuel stratification and mixture compression and external ignition, in which the majority of the fuel is fed through a I jno a flow valve in the form of a flow chamber! of fuel and air with a high fuel content from a system for forming the main combustion chamber, such as a fuel injector, to a main combustion chamber and the fueling of the residual part of the charge provided by the gun mixture e · · · e «• ee · eee e ee · * • eeee .·** • e * eeeee eee eee• se eee·*· • I * e * »ee •ee· e· "e eee eeee s eee #ee ee * ee eee# eee• e ·eeee >ee"* e · eee ece· ··*·.eeeeeee H Qi η η> 8K ^ φ o 2 ò o Ìt 't Gϊ> — - 2 THE Injection of air and fuel is made to flow from an injection pump in the secondary combustion chamber through an injection nozzle directly to a secondary combustion chamber which is raised to the main combustion chamber by means of a charging duct, the fuel supply system comprising a fuel tank. THE In a known fuel supply system for a four-stroke internal combustion engine with a mixture compression and "extraneous coeff*-ion" with an air stratification, of the type mentioned above, there is a pump for the supply and conveyance of the fuel, the fuel-air mixture with a high fuel content, which flows through an aerator into the main combustion chamber, and a fuel feed pump for the fuel, the fuel-air mixture with a high fuel content, which flows through an injection pump into the secondary combustion chamber. Both of these fuel pumps are necessary, since the i^nic- pump I ·«"**41 “ 41 eartur“te · H* 1 bar θ for 11 fuel is only necessary e·*·ee• ee ·se ee ee··ossee ee··• I ··**·e ee ee ee ee · e !* eeee ee e··*e 7 e ♦••eee ·ee• · e ·.ee ec · • ••e<«MI* eee ·e MM eee · e ee e · • e *ee # e >ea • e ·eaeeee · • e* MM l|M ee ·sete - 1 - fuel flow pressure equal to orifice 0^2 bar» The cost for such a fuel supply system is relatively high due to the need for two fuel pumps* The aim of the invention is to create a fuel supply system for an internal combustion engine of the type mentioned above with a lower cost than that required for the known fuel supply system. According to the invention, this task is solved by the fact that the fuel supply system has a single pump for the fuel ! Fuel supply or supply» by means of the I : actual fuel coming from its tank ! Is made to flow directly to the pump» i ! I ; j tion of the secondary combustion chamber and to the carburetor through a pressure reduction valve. This creates a fuel supply system for internal combustion engines with charge stratification» which, in addition to lower costs, also has a higher operating safety compared to the known fuel supply system» since ·· · * ***** • ee ee ·* • eee ea so* ·*·:. ee • eeee • essee eeee !♦ ··*» è • e *·„.* .. . eé**m* * *** t***** eeeeeeeeeee esse. eee* s *seee • · ' • e • e * * eee** * * e* • see ***·see * * * * ι i - 4 - : '.'Tima pressure reducing valve presents, based on its constructionally simple structure, Ì For safe operation, a lower susceptibility to .................................. .................................................................................................................................___________.__________________________________________________ ' disturbances than the electric fuel pump» III Fuel supply. ___________ "T .................. "..... i _____________________The invention is schematically represented in a simplified embodiment..... in the single figure of the drawing..__________________________________________________________________________ ------------------------- The fuel supply system 1 for a four-stroke internal combustion engine with compression of the mixture, with ignition and with stratification of the charge, indicated by 1, comprises a fuel tank 2, a pump 3 for conveying or supplying the fuel and an injection pump 4 relating to the secondary combustion chamber, a pressure reduction valve 5. ........ · ............... ......................... ..... .......... the pressure and a system for forming the main mixture, for example a carburetor 6.A fuel pipe, which leads from the tank 2 of the —l . ; '|itself to the -pump--! to......feed it, is indicated by ji ' ι Ì21, the fuel pipe which leads from the fuel supply pump 3 to the injection pump 4 relating to the secondary combustion chamber is indicated by -? and with 8 is marked the ι j fuel line leading from pump 3 of 5 .**· τ ττ. The fuel supply to the pressure relief valve 5 is made to flow through a relative pressure relief valve. The fuel is fed to the injection pump 4 by means of a pressure relief valve. The fuel line 9 is fed to an injection valve 10 and from the pressure reducing valve 5 through a fuel line 11 to the carburetor 6. The internal combustion engine 1 comprises a main combustion chamber 12 to which the majority of the charge is fed via a damping valve 13 under The fuel-air mixture is fed from the carburetor via a mixture duct 14 and a secondary combustion chamber 16 having a spark plug 11 and to which the fuel from the residual portion of the carburetor formed by the fuel-rich mixture of fuel and air is fed and is connected to the main combustion chamber 12 via a charging channel 17. The injection pump 4 for the secondary combustion chamber is connected to the fuel tank 2 by fuel return ducts 18 and 19 and the pressure reducing valve 5 is connected to the fuel tank 2 via fuel return ducts 19 and 19. ·cease ·*···· ···· • ··· * ·!,* ······ ·· · • · _ - · * · · · ·**·· ! .C sees « ····; ··.,··· • * · · * · ♦, .· M · ···· · ,· ···"' * " *"*"*! ······ · · * ·• · · · · * • · *·.and and· ·