DE1601991A1 - Method and device for operating a gasoline engine with two different fuels - Google Patents

Description

Patent attorneys Dipl-Ing. F. Weickmann, Dm. Ing.A-Weickmann DlPL.-lNG. EWlICKMANN, DIFL.-PHTS.DR.K.FINCKB

D1FL.-INC. F. A. Ve ι ckmann, Dipl-Chem. B. Huber ~~ "1601991

t MÖNCHEN 27 DEN

MOHLSTRASSE 22, NUMBER 41 Jf 21/22

SABM

OUTBOARD MARINE CORPORATION, Milwaukee, Wieconsin, V.St.ν.Α.

Method and device for operating a Otto engine with two different fuels

The subject matter of the invention is a method and a device for operating a gasoline engine with two types of fuel. a volatile fuel such as Beneiii leads. The? E? G «3e £» it · ίο> ^ volatile fuel, such as seroein, ge9p © i§t _ö B £ ® äs®, fuels are conducted from separate torratta ^ k Supply of volatile power% off @

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gradually throttled with increasing engine speed. To do this, a. Part of the feed line for the volatile Fuel compressed by a cam follower, the tone of the throttle valve control, i.e. the throttle lever, for example, is operated.

The invention relates to two-stroke and four-stroke gasoline engines and particularly relates to the use of two different fuels for such engines.

The discovery creates a procedure and a gate direction about operating a gasoline engine with two fuels, being a volatile fuel, such as gasoline, for starting the engine and for low speed is used, while a less volatile fuel, such as kerosene, is used for continuous operation at high speeds is used. The two fuels are fed into the gas mixing chamber through separate nozzles introduced, whereby the gasoline from a separate, remote I * nk la the Iangsaalaufdüse and the kerosene το »another offside lank in the

is directed

Sin «Rsgnliervorrlohtung for the supply of the volatile Fuel decreases with increasing engine harmony When the throttle is pushed through, the volatile fuel is supplied through the low-speed nozzle. if

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the engine is operated at full throttle, the Bensinsufahr Greatly blocked · To change and block the supply of volatile fuel, various Serving means. In the construction described, the gelling device has a cam follower or a curve track on which moves from the throttle control will. If darch press the throttle control the motor speed is increased, the presses liookenstössel a compressible section of the Beaain supply line against an abutment. · The Nooken ram steers also the throttle valve in the via a lever connection Carburetor.

The method according to the invention and the method according to the invention Apparatus for running an engine on two different fuels reduces overall operating costs by using a cheap, lower quality fuel such as kerosene. The invention is particularly suitable for countries where "Motor kerosene" well-known distillate is available.

Xn the accompanying drawings represent dart

fig «1 eiae section view of an engine and carburetor. sers according to the invention {

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Pig. 2 «a fragmentary view of the controls for

the supply of volatile fuel, the Control is shown in the closed position.

· 1 shows in partial view, a gasoline engine, the iet collectively referred to 'Bit 10, as well as a part of an engine block 12, "inen part of a flywheel 14 and a carburetor 16. The carburetor 16 has an air folding · 18, and a throttle valve 20. Further, The carburetor has a first nozzle 22, the high-speed nozzle, through which fuel enters the venturi tube 27, and a second nozzle 24 »the slow-flow nozzle, through which fuel is introduced into a mixing chamber 26.

According to the invention, means are provided for * a first To feed non-volatile fuel, such as kerosene, to the first nozzle 22. A * less volatile In the description given, fuel means a fuel that is not capable of running the engine iaCftQgitt0 «ts« a and the d «n L« r run a ·· two-stroke or ViertsJct-Otto solos not satisfactorily ignores the But in the lag · 1st, then the operation of the engine b «i above that Sufficiently entertaining idle speeds. As a means for supplying a first fuel serve a float chamber 28 and a fuel pump 50, which are connected to a remote, non-built

009813/0498 ^, i

is .. *

»Own fuel tank can be connected 1st. this fuel tank can by eng crankcase pressure or by the fuel pump 30 can be pressurized. The fuel pump 30 protrudes with the float chamber a line 31 in connection.

According to the invention means are provided to the second DUse 24 a second, lighter compared to the first To deliver volatile fuel, such as gasoline, that will start the engine and at all speeds la can keep running. These means include a 3chv} mmarkainmer 42 and a B? A £ ta $ ef 44t äie a remote & i via a line 45 aa notes fuel tank that is not shown is bar. pie float chamber is with the second 24 connected via a line 34. Another line 43 connects the float chamber 42 to the fuel pump 44 ·

In accordance with the invention, a device is provided to increase the amount of the first and second fuel fed in in an "inetellb" rtr manner in eatgegeägetsetstea Si ^ n su veräadem ". This device works so that it increases the supply of the second fuel nozzle dea? t _r when the power supplied to the first nozzle Mgng® i © ateü KraftstoffeB increases. To be more precise, we are feeding the first fuel, i.e. Seroein,

0088S3 / 04SS 'bad owqinal

when the accelerator is depressed to increase the engine speed, and the supply of the second fuel, i.e. gasoline, is progressively reduced when the accelerator is depressed. Various arrangements can be made to achieve this. In the exemplary embodiment described, the line 34 has a compressible section 36 in the form of a rubber hose or the like, which is normally open when the engine is in place and when the engine speed is low, and which is closed and compressed by a punch 46. Ofc this mn cause pivots represents Nooitastöeeel against a support la * the form of a Auslegere koeprimiert 48 and the section 36, as Xn Fig. 2 "shown on a throttle lever movement towards which corresponds to the increase in engine speed. The N _o ckenstössel 46 is actuated τοα a Hubsoheibe 50 which moves together with the not-shown control panel when, a off arranged throttle control is operated as described ia US Patent No. 2,906,251. Dar cam follower 46 is also used to operate the throttle valve 20 su, wit Ια dtr the aforementioned patent bee ohritben.

Xa operation will do a wide, proportionate start of the engine Highly volatile fuel, for example gasoline, through the line 34 of the second nozzle 24 fed. The throttle valve 20 is at the start of the

BATH ORIGINAL

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The engine and idling are normally completely or partially closed, so that the ingress of air into the mixing chamber 26 is reduced. In this state of low suction in the Venturi tube, little or no fuel of low volatility is injected through the first or main nozzle 22. If the engine speed is increased by opening the throttle valve 20 with the aid of a remotely located throttle valve control, the first, relatively poorly volatile fuel is fed into the mixing chamber in increasing quantities as a result of the increased suction force through the first nozzle 22 and the venturi tube 27 the throttle valve control, which has been moved at a speed below full engine speed, ie has advanced to about 3500 "to 4000 rpm, the fuel mixture contains about $ 80 kerosene and 20 generally gasoline If the cam follower begins to compress the section 36, 36 of the line 34, the supply of the second fuel is gradually reduced until the throttle valve is wide open and the line 34 is completely closed th fuel, kerosene.

A non-volatile fuel, for example as the first fuel according to the description

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BATH ORIGINAL

can turn, has an initial boiling point of about 60 joigen distillation at 20O ⁰ C, a

Endo boiling point of 260 ⁰ C and an octane number of 66.5 MM- In contrast to this, a second fuel used

Bares gasoline approximately an initial ^{boiling point of 35 0} O with a 50 #igen distillation at 100 ⁰ C, a

Badeiedepuokt of 190 ⁰ C and an octane number of 85.0 MM.

*,
The rational operation of a gasoline engine when applying the teaching of the invention is obvious. In areas or countries where gasoline is relatively expensive or available in limited quantities, the operation of an engine according to the description above is partial.

Ready existing engines can eioh according to the invention

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converting manure in such a way that the first fuel, i.e. the kerosene, through the existing high-speed nozzle is fed and the supply of the second, fuel is connected to the low-speed nozzle, with daan the otherwise usual connection «wipe the sonar nozzle and the slow speed jet is blocked *

- patent claims -

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BAD ORSSiNAL

Claims (12)

Claim he 1. Procedure for operating a gasoline engine with two different ones Fuels, marked! that in the carburetor of the engine for starting and slow running dds engine a second fuel and he increase the ü ^ gate speed is fed a first fuel will. , 2. The method according to claim 1, characterized in that the erite fuel is less volatile than the swei « t · fuel. 3. The method according to Aaspruoh 2, characterized in that the second fuel is gasoline and the first fuel! • rosin is « 4 · Expires according to the claims “1 to 3” gakennzeichßtt that the enclosed · * fuel · Aarch separate Nozzles of the carburettor can be removed. 5, Tsrffthren naoh one of the Aniprüoha 1 to 4- _f indicates that the supply of the second Erafteteffss iium VangiiuQs with v / f.chaendor Motorgesohv / ißdigkei lioh is reduced wl 'U T601991 - ίο - 6. The method according to any one of claims 1 "to 5, characterized. characterized in that the supply of the first fuel is gradually increased with increasing engine speed 7. The method according to any one of the parts 1 to 4, characterized in that that with increasing engine speed the supply Des. Second fuel to the carburetor gradually decreased and the supply of the first fuel at the same time is gradually increased. 8. The method according to any one of the preceding claims 1 7t daduroh marked, daft the first fuel soloher The nature of the matter is that it is unable to start the engine and that such a fuel is chosen as the second fuel that can start the engine as well as keep it running. 9 * Carburetor for a gasoline engine sit a first and a »wide, in a Hiechkaumer binding fuel nozzle and with a throttle valve, which is connected to a control, for example in Porm dee throttle lever, to exercise of the method according to one of claims 1 to 8, characterized in that the first nozzle (22) with a first fuel and the wide nozzle (24) with a sswei -U- - li - th fuel is supplied and that a regulating device is provided, which controls the supply rate of the first ^ aftstoffes and the second fuel to the carburetor adjustable changed. 10 »Carburetor according to claim 9, characterized in that the regulation regulation for the fuel supply the supply rate of the second fuel to the second nozzle (24) reduced when that of the first nozzle (22) suggested The amount of the first fuel grows. 11..carburetor according to claim 9 or 10, characterized in that that the regulator with the throttle valve control, d.i. preferably the throttle, functional is coupled. 12. Carburetor according to one of claims 9 to 11, characterized in that that a compressible AbachAitt (26) of a line (34) belongs to the regulating device, the is underlaid with an abutment (43), as well as a cam follower (46), which is supported by a lifting disc (50) on actuation of the throttle valve control moves, is pushed against the abutment and in a predetermined Advance position of the throttle valve control compressible section of the line. - 12 009 883/0498 SAD original 13 · Carburetor according to one of the speeches 9 to 12, characterized in that that a fuel pump (30) is provided for supplying the first fuel to the first nozzle (22) is, which can be connected to a remote supply of the first fuel, as well as one with the erite nozzle (22) associated swimmer carriages (28) and a connecting line (31) between the fuel pump and the float chamber, and that for the supply of the second fuel to the second nozzle (24) a further fuel pump (44) is provided which can be connected to a separately arranged supply of the second fuel, as well as one with the second DU-se connected float chamber (42) and a line connecting the fuel pump bit of this float chamber (43). 009883/0498