US1966771A - Internal combustion engine - Google Patents

Description

July 17, 1934. A THAHELD 1,966,771

INTERNAL COMBUSTION ENGINE Filed Nov. 26, 1950 4 Sheets-Sheet l gjwue ntoz M 17, 1934. F A HAHELD 1,966,771

INTERNAL COMBUSTION ENGINE Filed Nov. 26, 1930 4 Sheets-Sheet 2 July 17, 1934. F HAH L-D 1,966,771

INTERNAL COMBUSTION ENGINE Filed Nov. 26, 1930 4 Shets-Sheet s gwo qntoo fer/ A. Tba/w/d July 17, 1934.

F. A. THAHELD INTERNAL COMBUSTION ENGINE Filed Nov. 26, 1930 4 Sheets-Sheet 4 Patented Jul 17, 1934 "PATENT OFFICE INTERNAL COMBUSTION ENGINE Feri A...Thaheld, Dallas, '.le x., assignor, by mesne assignments, to Guiberson Diesel Engine Company, Dover, DeL, a corporation of Delaware Application November 26, 1930, Serial No. 498,351 I '1 Claims. (Cl. 123139) This invention relates to new and useful improvements in internal combustion engines.

One object of the invention is to provide a fuel supply line or passage made integral with the engine crank casing, whereby broken fuel lines,

fire hazards and other dangers resulting from exposed fuel lines are eliminated; and also whereby the numerous exposed connections to the fuel pumps are obviated.

A further object of the invention is to form the fuel passages entirely within the walls of the crank case, whereby the fuel liquid is pre-heated and made more readily combustible.

Another object of the invention is to provide a continuous fuel passage within the wall of the crank case; which may be intersected by fuel pumps, whereby an adequate supply of fuel is passed from one pump to the adjacent pump or pumps and all pumps thus fully supplied.

A construction designed to carry out the invention will be hereinafter described together with other featuresof the invention.

The invention will be more readily understood from a reading of the following specification and 25. by reference to the accompanying drawings in which an example of the invention is shown, and wherein:

Figure 1 is a partial rear elevation of a multiple cylinder engine constructed in accordance with the invention,

Figure 2 is a vertical sectional view of the same taken at right angles to Figure 1,

Figure 3 is a partial transverse vertical sectional view showing elements of the fuel system and the, pumping mechanism,

Figure dis a partial vertical sectional view of the same parts, taken at right angles to Figure 3, Figure 5 is an enlarged vertical sectional view of one of the pumps and its associated elements, and

. Figure 6 is a horizontal cross-sectional view showing the fuel ports and passage.

,In the drawings the numeral 10 designates a split crank case which is divided by transverse vertical partitions 11 and 12, (Fig. 2) into a forward chamber A, a middle or central chamber B and a rear chamber C. The chamber A may be designated as a nose "chamber and is preferably given a frustro conical shape so as to offer less wind resistance. The central chamber might be designated as the main or crank chamber, while the chamber C may be called the central or fuel chamber.

invention form the subject matters of separate applications,-; it is not considered necessary to enter into a detailed description of the engine except in so far as is necessary for a clear explanation and understanding of the present. invention.

A crank shaft 13 is suitably mounted in the crank case and a plurality of cylinders 14 are mounted radially on said crank case. Each cylinder is provided with a piston 15 having suitableconnection with the crank shaft. A valve 16 is provided at the outer end of each cylinder and each valve is operated by suitable mechanism.

The invention has been illustrated as applied 70 to an engine of the fuel injection type, and each cylinder is provided with an injector 17 having a valve 18. Each injector is connected by means of a short tube 19 with the head 20 of a pump 21. 1 Each pump includes a cylindrical barrel 22 secured in the crank case preferably but not necessarily by a flange 23 and stud bolts 24 as is shown in Figure 5.

Fuel is supplied from a suitable source through a pipe 25 to a booster pump 26 from which a feed pipe 27 extends in rear of the crank case, as is shown in Figure 1. An important feature of the invention .resides in a continuousfuel line or passage 28 wholly embedded in the wall of the crank case in the chamber C. The fuel feed pipe 27 is connected with a nipple 29 screwed into the wall of the crank case and discharging into the fuel passage. Fuel is thus supplied r. under pressure to the fuel line and distributed. thereby. I

The barrel 2' of each pump, as is .best shown in Figure 5, is provided with a shoulder portion 30 which rests upon a gasket 31 carried on a seat 32 in a cylindrical socket 133 which receives the shoulder portion of said barrel. The socket in-. tersects the passage .28 and the pump barrel is provided with an annular groove 34 which forms a by-pass for; the fuel passage. The groove aligns with the passage and is provided with a strainer ring 35 which prevents foreign particles from entering the pump barrel.

A fuel plunger 36 having a close sliding fit in the bore of the barrel 22 has a boss 3'7 at its lower end resting upon an actuating lever 38. This lever is periodically tripped by suitable mechanism operated by the crank shaft 13. A coiled spring 39 carried by the pump barrel engages the plunger and holds the boss in contact As the invention has particularly to do with 5 the fuel system andas the other features of the with the lever. The pump is provided with diametrically opposite ports 40 shown in Figures 5 11 and 6, and these ports extend from the groove 34 to the bore of the pump barrel. Normally the upper end of the plunger 36 is below these ports so that a full charge of fuel is assured.

It is obvious that when the lever 38 is swung upwardly the plunger 36 will be lifted, thereby closing the ports 40 and expelling the fuel charge through the cap.20 in to the tube 19 and finally through the injector 1'7 to the engine cylinder. A suitable check valve 41 is mounted in the cap 20, and this prevents leakage back into the bore of the pump and the fuel passage 28. It will be seen that the passage 28 is continuous and extends from one pump to the adjacent pumps. Each groove 34 is ample to by-pass the fuel as well as to feed the pump. This arrangement prevents one pump from starving another and assures an even, positive and ample fuel supply to all pumps.

The fuel liquid passing through. and entering the pumps will be pre-heated because of its location within the wall of the crank case.' It is obvious that this will be of great advantage and any heat stored within the crank case will be utilized in pre-heating the fuel and keeping it warm for an indefinite period after the engine has stopped running. The internal fuel passage and the mounting of the pumps eliminate the fuel line connections usually employed to connect the' pumps with the fuel line, and by this arrangement a serious source of leakage is eliminated. It is pointed out that between the pumps the passage 28 is formed in an internal boss or rib 28 (Figures 2 and 3), which boss is directly exposed to the heat of the crank case, particularly in the chamber C. By this arrangement heat is much more quickly transmitted to the fuel liquid than if the passage were embedded within a thick wall instead of in the boss;

Various changes in the size and shape of the different parts, as well as modifications and alterations, may be made within the scope of the appended claims.

Having illustrated and described a preferred form of the invention, what I claim, is:

1. The combination in an engine of the character described, having a crank case having a surrounding wall, and radial cylinders mounted in the wall of the case; of pumps having their barrels seated in and extending through the wall of the case, there being a separate pump for each cylinder located adjacent thereto, fuel ducts confined in the wall of the crank case and connecting the pump barrels, each pump barrel having a surrounding groove connected with the ducts for forming therewith a continuous fuel passage around the crank case, each pump having a fuel inlet connected with its groove, and means for supplying fuel to the fuel ducts.

2. In an internal combustion engine having a crank case, a plurality of cylinders projecting outwardly from the crank case, pumps for supplying fuel to said cylinders mounted on said crank case, bosses exposed on the inner wall of the crank case and having fuel passages therein connecting said pumps, and means for supplying fuel to said passages.

3. The combination in an internal combustion engine having a crank case, a plurality of cylinders mounted on said crank case, and means mounted on the crank case for supplying fuel to said cylinders, of restricted fuel lines located entirely in the wall of the 'crank case and forming straight connections between said fuel supply means, whereby gas pockets are avoided, and means for conducting fuel to said lines.

4. The combination in an internal combustion engine having a crank case, a plurality of cylinders mounted on said crank case, and means mounted on the crank case for supplying fuel to said cylinders, of pipe-like fuel lines-located entirely in the wall of the crank case and forming straight connections between said fuel supply means, whereby gas pockets are avoided and means for conducting fuel to said lines.

5. The combination in an internal combustion engine having a crank case, a plurality of cylinders projecting outwardly from the crank case, and pumps mounted on said crank case for supplying fuel to said cylinders; of a continuous restricted fuel line in the crank case wall extending around the case connecting the pumps, and means for supplying fuel to the continuous line, said fuel line being formed of straight connections between adjacent pumps so as to avoid gas pockets.

6. The combination in an engine of the character described, having a crank case having a surrounding wall, and radial cylinders mounted in the wall of the case; .of pumps having their barrels seated in and extending through the wall of the case, there being a separate pump for each cylinder located adjacent thereto, restricted fuel lines confined in the wall of the crank case and forming straight connections between the pump barrels, each pump barrel having a surrounding groove connected with the lines for forming therewith a continuous fuel line around the crank case, each pump having a fuel inlet connected with its groove, and means for supplying fuel to the fuel lines.

'7. The combination in an internal combustion engine having a crank case, cylinders carried by the crank case, and fuel pumps mounted on the crank case in spaced order, of pipe-like fuel lines of small size entirely embedded in the wall of the crank case for conveying fuel from one pump to another, whereby fuel is rapidly replenished, and means for supplying fuel to said lines.

FERI A. THAHELD.

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