Vaporizing device for explosive-engines.

(Application filed July 10. 1900.) (No Model·)

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.THE NORHiS PETERS CO., PHOTO-LITHO.. WASHINGTON, D. C.

United States Patent Office.

CHARLES ERNEST DAWSON, OF CHISWICK, ENGLAND.

VAPORIZING DEVICE FOR EX PLO SIV E-EN G IN ES.

SPECIFICATION forming part of Letters Patent No. 668,953, dated February 26, 1901.

Application filed July 10, 1900. Serial No. 23,150. (No model.) and cover-plate e with baffle-plates f to cause the air to pass over an extended surface, or I fill the vaporizer-space with coarse copper 55 gauze li or some metallic conducting material having large surfaces and sufficient interstices to allow the discharge of oil and air. A combination of baffle-plates and gauze or other material may, however, be employed. 60

I provide the vaporizer-chamber a with a charge outlet-passage 1c, leading to t he engine inlet-valve, the passage lc being controlled by a throttle-valve m.

Into the inlet-passage j I attach my oil-sup- 65 ply and air-admission device b. This consists of a small cylinder n, provided with wiregauze surfaces 0 0, through which the air is drawn. At the lower part of this cylinder n I provide a perforated disk p, loosely fitting 70 and free to slide in the cylinder n. It is pressed upward Jjy-a-spiral spring r. The disk p carries with it a pin q, one of whose endsT pi’jjects into a recess t, bored in the end of a central oil-pipe u. The recess t is of 75 somewhat larger diameter than the end s and the bore of the pipett, so that a ball-valve v, slightly smaller in diameter than the recess t, supported on the pin end s, may when the spring r presses the disk and pin q upward 80 be forced against a valve-face y at the upper end of the recess t. The lower end of the pin q passes through a guide sand then through a hole in the bottom of the cylinder n.

The central oil-pipe u may be held in post- 85 tion by any suitable means—such as, for instance, by providing it with two small collars 2 and 3, one of which, 2, rests on a support 4, secured to the cylinder n by arms δ δ, while the other collar, 3, is arranged so that 90 on ^crewing a cap 6, provided with a support 7, similar to 4, into the cylinder n the pipe u is firmly held in the position shown in Fig. 1, while at the same time the wire-gauze partitions 0 are clamped between the supports 4 7 95 and the collars 2 3.

The pipe u is connected by any suitable means to an oil-supply pipe 8. I keep the petroleum-oil in the supply vessel under pressure of, say, twenty pounds per square inch 100 above atmosphere. The spring r is sufficient to keep the ball-valve closed against this pressure. When, however, the engine makes its suction-stroke, it reduces the pressure within

To all whom it may concern? I

Be it known that I, Charles Ernest Dawson, a subject of the Queen of Great Britain and Ireland, and a resident of Hogarth Works, 5 Chiswick, in the county of Middlesex, England, have invented a certain new and useful Improvement in Oil-Engines, (for which I have made application for Letters Patent in Great Britain, No. 22,636, dated November 13, io 1899,) of which thefollowingisaspecification.

My invention relates to explosion oil-engines in which the combustible mixture is formed by vaporizing heavy oil, such as “Royal Daylight” and other lamp-oils._

The object of my invention is to provide a vaporizer which will not decompose the oil and produce tar, the vaporizer being heated during the running of the engine by heat obtained from the waste gases and the heat so 20 obtained being carefully regulated by limiting conduction, so that the vaporizer is always kept at, a low temperature sufficient for vaporizing, but not sufficient to cause destructive distillation and the production of tar. I have found by experiment that exhaust-vaporizers are very easily overheated, and I have so devised iny new vaporizer that the heat reaching it from the exhaust never exceeds the amount necessary to vaporize and 30 heat the oil and entering air charge to a temperature but little exceeding 212° Fahrenheit.

Referring now to the accompanying sheet of drawings, Figure 1 is a vertical section through the center of my vaporizer. Fig. 2 is 35 an elevation of the same looking on the oilsupply device. Fig. 3 is a sectional plan of the vaporizer through the line xx.

In carrying my invention into effect I provide a vaporizer consisting of a vaporizer40 chamber a and oil-supply device b, the chamber a being connected by a metal web or feather c to an exhaust-pipe cl.' I preferably cast part of the exhaust-pipe cl and vaporizerchamber a together, connecting the two, how45 ever, by this feather only, which serves to conduct heat from the exhaust to the vaporizer. The vaporizer-chamber a may be cylindrical in section, or it may be of anj’ other convenient section. Moreover, it may be 50 closed by a cover-plate e and divided into two or more parts to allow of ready access to the interior. I sometimes provide the chamber a

668,953 the vaporizer, the perforated disk p moves downward, the ball-valve v thus opens, and the oil is discharged on the perforated disk p and taken into the vaporizer with the air5 supply. Here vaporization of the oil is partly effected by the heat and partly by the mixture being drawn through the wire-gauze h. The combustible mixture is now taken into the engine - cylinder, compressed, and exio ploded under compression by the electric spark or other convenient means. I regulate the engine by throttling the total charge. This is effected by the throttle-valve m, which is closed or partly closed by a governor or other 15 means when the speed of the engine becomes excessive.

By connecting the exhaust-pipe to the vaporizer-chest by a rib only the heat-supply to the vaporizer is exactly proportioned to· the 20 temperature of the gases passing through the exhaust-pipe. In this way, whether running at light or heavy loads, just sufficient heat is always supplied to vaporize the oil and the temperature never rises so high as to produce 25 tar. I test the temperature of the entering : charge after it leaves the vaporizer, and I regulate the rib-section of metal between the exhaust and the vaporizer so that the temperature of the charge leaving the vaporizer never 3° greatly exceeds 212° Fahrenheit. Regulation of the rib-section-may be effected by drilling holes 11 in the rib or feather connecting the vaporizer and exhaust-pipe. At this temperature, 212° Fahrenheit, or thereabout, no tar is 35 produced and the engine works without blocking the piston.

. I start the engine when cold eithe. uy heating the vaporizer by a lamp or by supplying it with a little light oil, such as “petrole ” until the engine is warm. This light oil may 40 be supplied by any suitable means—such as, for instance, by a pipe 12, led into the top of the oil-supply device b.