US1626561A - Heavy-oil vaporizer - Google Patents

Description

, D. T- SCOTT HEAVY OIL VAPORIZER April 26 Filed March 1 1924 y 3mm Dar/'0 Z 54077? NhM Patented Apr. 26, 1927.

DAVE) T. SCOTT, OI MITCHELLS ISLAND, VANCOUVER, CANADA.

HEAVY-OIL varomzna.

A-pplication filed March 13, 1924; Serial No. $9,088, and in Canada December 24,1923.

This invention relates to a means for vaporizing a heavy oil by the heat of the engine exhaust and for mixing the oil vapor with the required air for combustion in an internal combustion engine.

It comprises the combination with an ordinary carburetter of a chamber through which the engine exhaust passes before its delivery to the atmosphere, in which exhaust heated chamber the oil and the air with which the oil is vaporized and which is to be mixed in the carburetter, is heated to a temperature approaching that of volatilization of a heavy fuel oil, and through which exhaust heated chamber, the oil vapor, when mixed with the air for combustion, passes from the carburetter to the intake of the engine. p

The particular means by which this result is attained is fully described in the following specification, reference being made to the drawings by which it is accompanied, in.

which:

Fig. 1 is a vertical longitudinal section on the line 1--1-in Fig. 3, looking in the direction of the arrow.

Fig. 2 is a vertical section on the line 22 in Fig. 1.

Fig. 3.is a vertical section-on the line 3-3 in Fig. 1, and

*Fig. 4 is a cross section on the line 4-4 in Fig 1.

In these drawings 2 represents the, carburetter, 3 the oil, and 4 the air, delivery thereto, and 5 is the pipe through which the vaporized oil and air passes from the car-- buretter to the intake manifold of the engine and in which pipe it is heated by ex posure to the exhaust of theengine in a manner to be described. 6 is the valve which controls delivery from the carburetter.

This gas delivery pipe 5 from the carburetter passes through the ends of a substantially rectangular closed chamber 7. To

one end of this chamber 7 is secured a head- 9 having two ducts 8 and 10, of which 8 is in communication with the pipe 5 and delivers to the engine intake, and the other 10, is connected to the exhaust of the engine to deliver the exhaust into the chamber 7 surrounding the tube 5. From the edge of this exhaust delivery port 10, wh1ch 1S'-fllI- ther from the intake tube 5, partitions 11 and 12 extend. to nearly the other end of the chamber 7 where the5 are connec to- From each side of each door 15 a sheet iron' casing 16 is carried around the other three sides of the chamber 7. to maintain an air space 18 between the walls of the chamber and the casing, The'upper part of this air space 18 is open tothe atmosphere adj acent the sides of the door 15, and opposite.

the door theair space is connected through tubes 14 to the space 17 between the walls 11 and 12, which space is connected to the air intake to the carburetter through the 'duct 19.

An oil delivery tube 20 passes once or more around the chamber 7 in the lowerv part of this air space '18 and is connected at3 to the carburetter.

With this construction the exhaust of the engine enters the chamber at 7 and passes downward around the gas delivery tube 5 and upward among the tubes 1% before its delivery to the atmosphere through the port 13. .The waste heat of this exhaust thus passes through the walls of the chamber and heats the air for combustion in the air space 18through which the air for the carburetter is indrawn. It derives further heat from the exhaust as it passes through-the tube 14 and while it passes through the space 17 before its delivery through the, duct 19 to the carburetter at 4;. I

By this means both theoil and the air are heated to a temperature approaching that of volatilization of even a heavy oil before delivery to the carburetter.-

The oil vapor and air for combustion, as it is drawn from the carburetter, is further highly heated as it passes through the tube 5 to the intake of the engine, where the tube 5 is in contact with the hottest part of the exhaust, where it is delivered through the ort 10 intothe chamber7.

'1 e tube 5 will preferably be len hwise ribbed, as shown in the drawing as iiording a eater heat conducting surface.

$11.11 these conditmns, not only can a heavy fuel oil be effectively vaporized and the chamber, which compartment is conwithout carbon'ization, but the exhaust from nected by tubes to the 'acket space and to the engine is muflled and cooled before its the air inlet of the car uretter, means for delivery to the atmosphere, and the cooling admitting air to the jacket space, means for of the exhaust gases prevents the muflling heating oil in the jacket space of the chamfrom causing a back pressure in the cyl: ber, and means for delivering the aseous inders. mixture of oil vapor and air from t e car- To'enable anengine heavy oil vaporizer to be started a supple the engine intake. mentarycarbu'retter 21. served at 22 with n gasolene or a light hydrocarbon oil may combination with a curburetter, of a chame furnished and the gas delivery pipe 23 her through which the engine exhaust is defrom this carburetter may be connected to livered, said chamber having a jacket space the gas intake pipe 5. After the engine is surrounding it and a compartment within started the supplementary carburetter may thechamber w ich is in direct communicabe cut off by the valve 24. tion throu h tubes withinthe jacket space An aperture 25, see Fig. 1, afl'ords direct and'with the air delivery to the carburetter, comunication between the 'exhaustadmismeans admitting air to the jacket space,

sionlO to the'chamber 7' and the exit 13 means within the chamber for heating the therefrom, which aperture is closable with oil fuel before its delivery to the carburetter, a valve 26 by which valve the amount of the and means within the chamber for separately exhaust gases delivered into the chamber 7 heating the vaporized oil and air before ole-- may be re lated to the engine requirements. liver to the engine intake. The POSilllOIl Of this valve 26 ma be con- '3. n combination with a carburetter, a trolled by a thermostat in the c amber 7 vaporizer comprising a body having. an or in the gas delivery 5 t0 engine in ke. elongated chamber, a gas delivery pipe pass- By heating the fuel constituents f r an ing through said chamber from end to end, internal combustion engine in a chamber one end oi said ipe being connected to the throu hwhich the exhaust ofthe engine is outlet of the car uretter, said chamber havpasse before delivery of these constituents ing an exhaust inlet opening at one end, a to a carburetter, a heavy fuel oil can be cap having two ducts secured to said body, used in amore economical manner and beone duct connected with said pipe at its equipped with this buretter separately through the chamber to 2 In an internal combustion engine,the

subject tomore effective control to meet the varying 7 requirements of an engine than where the heated oil is sprayed into a cylinder or into a heated duct or passage where 'erture of the casing,

the oil is liable to carbonize, unless the temperature and the proportions are very carements. i w

vInstead of delivering the exhaust gases through the up er port of the casing 15 and exhaustin t em to atmosphei'e through theport 13, i desired, this connectionniay be reversed and exhaust gas delivery effected at 13 and exhausted through the upperapregulated to the changing require- Having now particularl described iny invention, I hereby declare t at what-I claim .as new and desire to be protected in by, Letters Patent, is: a v i 1. In an internal combustion engine, the

combination with a carburetter, of a chamber through which the exhaust from the engine is passed said chamber havinga jacket space surround ing it and a compartment within other end and the other duct connected with the exhaust inlet opening at the and chamber, the first of the said,caps ducts adapted to connect with the intake of an engine while the other of its ducts is adapted for connection with the exhaust at the engine, said body having a duct leading from the end of the said chamber farthest from the inlet opening back parallel to the chamber and delivering to atmosphere, a shell around three sides of said casing and enclosing a fresh air space, said casing havin a chamair intake. of the carburetter, and tubes from tubes passing t rough said last named duct to be mated by the exhaust gases, and an oil feed pipe to the carburetter and having a portion coiled around said casing within the fresh air chamber,substantiallyas shown and described. v

In testimony whereof I afix [Davin nscor'r.

my signature,

bar and a duct therefor connecte with the I

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