Internal-combustion engines – Charge forming device – Charge-mixing device in intake
Patent
1990-03-29
1991-08-06
Wolfe, Willis R.
Internal-combustion engines
Charge forming device
Charge-mixing device in intake
123591, 261 88, F02M 1716, F02M 2902
Patent
active
050368265
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention relates to a mix improvement device for internal combustion engines with central injection, and with a flywheel arranged in the suction pipe and set in rotation by the stream of suction air, which drives a rotor with an injection device for the fuel, and is connected with the latter as well as a fuel feed line led into a hollow space of the rotor.
BACKGROUND ART
In mix preparation and the measuring out of fuel for internal combustion engines, very high requirements are set for both a carburetor and an injection unit as to the content of the exhaust in harmful substances. As we known, high proportions of harmful substances in the exhaust are traced to an insufficient quality of mix, that is, mixing of fuel and combustion air. To obtain a good quality of mix, an optimal mixing of fuel and suction air, a homogeneous distribution of the fuel in the stream of air, and a homogeneous drop size are especially important. Especially in lean engine concepts where one works with a high excess of air, these factors attain still greater importance.
Known means for attaining a good quality of mix are central injection units, such as those described in Kraftfahrttechnische Taschenbuch, 19th edition, VDI Verlag GmbH, Dusseldorf, on Pages 374 and 375. In these devices, an air mixing meter is installed between an air filter and a mix former. In this air amount meter, there may be a damper, a heating wire, or an ultrasonic measuring location. After flowing through the air amount meter, the suction air is led to the mix-forming point. Here, an injection valve is arranged in the suction pipe to which fuel is fed under pressure. The injection valve is equipped with a nozzle, and the fuel is injected through this latter into the suction air stream. In the flow direction of the suction air stream, below the injection valve, is a known choke valve for the regulation of the stream of air or mixture. The feeding of the fuel to the injection valve takes place through a fuel pump. The delivery amount of this pump is determined by a control. The air amount meter serves as sensor for the control.
In addition to the injection valves, spiral scoops, supersonic vibrators, pulsating systems and other devices are sometimes used for improvement of the quality of mix. Injection nozzles for pulsating or air-jacketed systems are technically elaborate in construction and production, and are relatively expensive. The injection valves and nozzles known today cannot assure an ideal thorough mixing of the fuel with the air stream. Moreover, the droplet size of the injected fuel is distributed over a wide spectrum, which in addition to poor mix formation, favors the danger of deposition of fuel on the parts of the mix former. The known difficulties such as the increase of fuel consumption and of harmful substances in the exhaust result from this.
From U.S. Pat. No. 4,044,081 is known a mix-improving device in which an injection valve is combined with a rotary atomizer. A flywheel is arranged in the suction pipe of this device, and namely, before the choke valve in the flow direction of the suction air stream. The flywheel is connected with a rotor and drives the latter. The stream of air flowing through the suction pipe sets the flywheel, and thus the rotor, in rotation. An air line for hot air as well as a pressure line for fuel are introduced into the rotor. In the zone where the two lines discharge into the rotor, one or more eddy chambers are arranged inside in which an intensive mixing of the hot air with the injected fuel should take place. In the peripheral zone of the eddy chamber, nozzle bores are arranged which make possible an outflow of the fuel-air mixture in the direction of the suction air stream. The outflow of the fuel-air mixture through the nozzle bores is promoted by the centrifugal effect of the rotating rotor, while additional openings are also arranged in the suction pipe to obtain an improvement of the thorough mixing of fuel and air. The arrangement of the additional mix improvement devices in
REFERENCES:
patent: 2791409 (1957-05-01), Lauder
patent: 3654909 (1972-04-01), Rollins
patent: 4044081 (1977-08-01), Weidlich
patent: 4283358 (1981-08-01), Diener
patent: 4399800 (1983-08-01), Weindelmayer
patent: 4422432 (1983-12-01), Knox, Sr.
patent: 4474712 (1984-10-01), Diener
patent: 4725385 (1988-02-01), Diener et al.
patent: 4726342 (1988-02-01), Diener
patent: 4751905 (1988-06-01), Bonfiglioli et al.
Bless Kurt
Bucher Roland
Nova-Werke AG
Wolfe Willis R.
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