Fuel-economy and emission-control device for internal combustion

Internal-combustion engines – Charge forming device – Charge-mixing device in intake

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Details

481801, F02M 2900

Patent

active

047153547

DESCRIPTION:

BRIEF SUMMARY
The invention relates to a device which, incorporated into the carburetors of internal combustion engines, economizes fuel consumption and controls pollution caused by exhaust emission.
The prior art embraces a number of devices designed to cut fuel consumption of and/or reduce pollution caused by internal combustion engines. Generally speaking, such devices are complex and costly; they call for extensive modification of the carburetors of production engines, they cannot always be utilized for given types of carburetor, and finally, results produced are not always wholly satisfactory.
The object of the invention disclosed herein is that of improving on a previous Italian patent filed under No. 48838A/77 on 5th Apr. 1977 by the same applicant, through the incorporation of inventive steps which are designed to enhance operation of the device to which the existing patent relates.
The improved device is one providing fuel-economy and emission-control, designed for use with any type of carburetor or other type of fuel intake system, and possesses the essential features of being remarkably simple in construction, efficient, and relatively inexpensive to manufacture.
The device consists, in essence, of a tapered spiral mixer element, and of means for mounting such an element between the carburetor and inlet manifold, or cylinder head, of an internal combustion engine. The mixer element itself is supported by a mounting flange embodied in insulating material (or in other material) and drilled through from the side in order to allow passage into the manifold of additional air, and of gases and vaporized oil produced during blow-by, which contain highly polluting substances that are duly recycled.
The intake of air and gases comes about by distinct stages. At first, air drawn in via the cleaner and gases drawn in via the blow-by system are channelled into a by-pass fitting having a setscrew; the channelled air and gases flow through the by-pass to a solenoid-operated metering valve, which is integral with the by-pass; the stream is then directed into a solenoid-operated cleaner valve fitted with an internal filter element; from this valve, the air and gases ultimately reach the aforesaid mounting flange, which is located between the carburetor and inlet manifold.
The invention will now be described in detail, by way of example, with the aid of the accompanying drawings in which:
FIG. 1 is a section through the carburetor of an internal combustion engine incorporating a component of the device disclosed;
FIG. 2 is a plan from above of the mixer element with its mounting flange, and a small bore tube embodied in copper (or other material) which projects from the mounting;
FIG. 3 is the section through 3--3 in FIG. 2;
FIG. 4 is a plan of one of the gaskets used in sealing the mounting flange illustrated FIG. 1;
FIG. 5 is the section through 5--5 in FIG. 4;
FIG. 6 is the plan of a distance piece fitted in conjunction with the component illustrated in FIG. 1;
FIG. 7 is the section through 7--7 in FIG. 6; and
FIG. 8 shows, in partially exploded and partially schematic view, the assembly of the mounting flange connected to external intake means through which a fluid supplied may be directed into the inlet manifold.
With reference to FIG. 1, 10 denotes the carburetor assembly of an internal combustion engine, mounted to the inlet manifold 12 of such an engine.
24 denotes the carburetor float chamber, which is connected by way of a passage 26 with the carburetor barrel in order to supply fuel via a jet 28 and a discharge nozzle 30 and bring about its mixture with incoming air in the conventional manner.
A choke flap 32 regulates the amount of air allowed into the barrel 20 of the carburetor, and a throttle valve 34 serves to control the amount of fuel-air mixture flowing through the barrel 20 and into the riser 22 of the inlet manifold 12.
The component denoted 40 in FIGS. 1, 2 & 3 constitutes an essential part of the fuel-economy and emission control device to which the invention relates, and comprises a mounting flange 42

REFERENCES:
patent: 1701607 (1929-02-01), Brinton, Jr.
patent: 1780130 (1930-10-01), Heard
patent: 1818471 (1931-08-01), Geauque
patent: 3973534 (1976-08-01), Amos
patent: 4123233 (1978-10-01), Mannino
patent: 4285320 (1981-08-01), Webster et al.

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