`Fume 24 1924.
J. c HANSEN-ELI.EHAMMER` FUEL SUPPLY DEVICE FOR EXPLOSION MoToRs Filed March 25, 191e Patented lune 24, 1924.
JACQB CHRISTIAN HANSEN-ELLEHAMMEB, OF COTENHAGEN, DENMARK.
FUEL-SUPPLY DEVICE FOR EXPLOSION MOTGRS.
Application led March 25, 1916. Serial Ro. 88,701.
ments in or Relating to Fuel-Supply Devices for Explosion Motors; and I do hereby declare the followin to be a full, clear, and exact description o the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to reference numerals lmarked thereon, which accompany this specification.
This invention refers to a device for fuel supply for explosion motors, in which a regulating member in the fuel supply pipe is made dependent upon the adjustment of the commonly used air-regulating member. Tliis is effected by disposing, between the regulating members, a pneumatic mechanism whose action is dependent upon the suction or exhaust of the motor, and which is a. substitute for the Hoa-t device used in the ordinary carburettors. According to this regulating system, in which thel fuel supply is regulated quite automatically, depending upon the air supply, there'is ob tained an essential increase of the regulating capacity of the motor, as well as convenient and economical adjustment according to the diierent speeds and loads.
A form of construction of the pneumatic mechanism in accordance with this invention and its connectionsvwith the air and fuel regulating members is shown by way of example in the drawing, in which F igures 1 and 2 are respectively .aA vertical section and a side ,vewand Figure 3 is a tragmenta vertical section through the valve contro ling cylinder and adjacent parts, showing a slight mpdification. In the construction here shown, it is assumed that the mechanism acts by means of the suction of the motor. While the present disclosure is for utilizing the suction of 'the motor, various modications may be made `Within the scope of the claims for otherwise operating the device.
A piston 3 in a cylinder e is, by means or" a preferably flexible intermediate part 5, ywhich is freely disposed in a pipe t' fastened in the bottom or' the cylinder, connected with a needle valve 7 with its seat on the top of a pipe 8 leading from the fuel tank or tanks (not shown inthe drawing). A pipe coupling 9 ont the pipes 6 and 8 forms a valve casing, and from here afuel pipe 10 leads to the mixing chamber 10a. y e
The piston rod 11 is `passed through the cover 12 of the cylinder 4 and outside the cylinder the iston rod is furnished with a head 13 wl? arm 14 on. the shaft 16 of the air-regulat- 1ch,forms a contact for the' ing damper 15.V In order hat the contact y may be adjusted, the contact point of the arm 14 may, for instance, be the endv of a screw 17.
The carbureter bddy 18 in which thev damper 15 is disposed, has a mixing chamber 10a and is placed above the engine and on this side, that is to say, on the inner side of the damper, this hollow body is for instance connected by means of a pipe 19 with the top of the cylinder 4, which at its bottom has one or more air-holes 20.
rIhus the suction of the motor will be transmitted to the cylinder 4 with the result that the piston 3, whose lower side is acted upon by the atmospheric pressure (through the holes 20) tries to rise, and always rises as high as the arm 14, 17 permits. It is presupposed th at this arm moves upward more and more as the dam er 15 is opened more and more, and when t e motor is in operation, the head 13 will cling to the arm as if it were mechanically connected with it, thus following its upward movement, whereby the valve?, at the same time that the damper 15 opens more and more to the supply of air, itself automatically opens more and more to the fuel su ply throu h the pipes 8 and 10. On t e other han when the motoris stopped, for instance, by interruption of the igniting current thus causing the suction eiect` to cease, the members 13, 11, 3, 5,. 7, no matter what height they may have risen to, i. e. no matter how much or how little the damper may have been opened, will at once fall, and the valve 7 will automatically shut 0E the fuel supply.
When the motor is runnin its suction effect is not only communicate to the parts 18,4, but also to the fuel pipe 10, and Jfrom here on through the pipe 6 (outside of the flexible vaive rod 5) up to the 'air holes 20, so that a small quantity of air can thus be sucked in. The tact that a small quantity o? air is sucked in from the pipes 10 and of the piston 3, since much more air can aov pass in through the holes 20 than can be sucked away through the pipes 6 and 10, so that the pressure under the piston will alwa s be that of the atmosphere).
f the motor is to be throttled down, it is only necessary to close the damper 15 more and more; the arm 14, 17 will then (against the pressure acting on the lower y side of the piston 3) force the members 13, 11, 3, 5,and 7 farther and farther downward. If the throttling is so strong that the damper 15 and the valve 7 are practically closed, the suction effect of the motor (through the lfuel pipe 10) which is still running will be relativelyI strong, so that, together with the very small quantity of fuel oozing out through the valve 7 a relatively great quantity of air will be sucked in through the pipe 6, and thus a suitable charge is automatically obtained.
Also in starting, it is only necessar to adjust the air-regulating damper.` hen the crank shaft of the motor is turned, the
.suction produced will cause the aforesaid members 1311,Y3, 5, and 7 to rise and begin action.
All details Shown in the drawings are of no significance to the invention and may be altered in many ways. The air for the spray can be *obtained elsewhere than through the holes 20. The exibility of the Valve rod 5 is of'importance in the form of construction here set forth, vbecause the valve 7 thereby hangs free, so that it cannot be given an obli ue action, but falls straight into its seat.v T e moving-directin of the valve 7 and the piston 3, etc., does not need to be` up and down, since the force which counteracts the effects `ofthe air pressure on'the one side of the piston may be some other force than that of gravity, for instance the force of a spring 30 shown in Fi re 3.
, ther modifications maybe resorted to within the spirit and scope of the invention, as defined in the appended claims.
1. In a fuel supply device, an air supply y regulating means, and a fuel supply regulat-ing means including a Valve and a yieldable connection for the valve adapted to engage said air supply means for limiting the opening of the fuel valve when the air supply means is closed, said yieldable connectionl for the' fuel suply valve permitting automatic opening of the valve by pressure increasing proportionately to the closing of the air supply means and adapted to operate inde endently within said limit of the air supp y means. j
2; A fuel supply device for internal combustion engines, having an air regulating member, a fuel regulating member, a cylinder communicating at one end with the suction chamber of the engine, a piston normally urged in one direction in the cylinder and adapted to be moved in an opposite direction by reduction in air pressure lin said chamber, a fuel nozzle leading from aving openings therein leadingy the piston under action of the reduced pressure in said chamber, and permitting normal operatlon of the piston when normal pressure 1s restored in said chamber, and a 'flexible connection between the fuel regulating member and the piston.
3. In a carbureter, a fuel supply valve, an airsupply Valve, a cylinder, a piston in the cylinder having a rod projecting beyond the cylinder, an adjustable stop carried by the air valve for engaging said piston rod to limit the 'operation of said piston under reduction of pressure and flexible connection between said piston and said fuel supply valve for opening the same upon the operation of the piston and arranged to be closed upon the release of the piston, the reduction of pressure being adapted to feed the fuel and open said valve proportionately to the amount of air admitted to the suction chamber, saidrflexible connection permitting automatic adjustment of the fuel supply valve on its seat to insure shutting ofi' of the fuel supply when the, piston is released.
In testimony that I claim the foregoing as my invention, I have signed my name in presence of two subscribing witnesses.
JACOB CHRISTIAN HANSEN-ELLEHAMMER.
CHAs. P. PREssLY, H. MEISNER JENSEN.