US1555511A - Process of and apparatus for cooling internal-combustion engines - Google Patents

Description

Sept. 29, 1925. 1,555,511

W. W. MUlR PROCESS OF AND APPARATUS FOR- COOLING INTERNALGOMBUSTION ENGINES Filed Feb. 15. 1922 2 Sheets-Sheet 1 fnveniln,

( WWMuir arm/M Sept. 29, 1925. 1,555,511

w. w MUIR PROCESS OF AND APPARATUS FOR COOLING INTERNAL COMBUSTICN ENGINES Filed Fe 15. 1922 2 Sheets-Sheet '2 Patented Sept. 29, 1925.

UNITED STATES PATENT OFFICE.

WELLINGTON W. MUIR, OI LOGKPORT, NEW YORK.

Application filed February 15, 1922. Serial No. 536,827.

To all whom it may concern:

Be it known that I, WELLINGTON W. Mum, a citizen of the United States, residing at Lockport, in the county of Niagara and State of New York, have invented certain new and useful Improvements in Processes of and Apparatus for Cooling Internal- Combustion Engines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to a cooling system for internal combustion engines, ,wherein a double impeller pump is employed, and has for its object to provide a method and an apparatus which Will be simple in construction, certain in action, and more eflicient in use than those heretofore proposed.

With these and other objects in view, the invention consists in the novel steps and combinations of steps constituting the process and in the novel parts and combinations of parts constituting the apparatus, all as will more fully appear hereinafter and be particularly pointed out in the claims.

Referring to the accompanying drawings forming a part of this specification, in which like numerals designate like parts in all the views:

Figure 1 is a diagrammatic, partially sectional view of a cooling system made in accordance with this invention; and

Figure 2 is a similar view of a somewhat modified form of the invention.

1 indicates any suitable engine jacket, 2 the normal level of the coolingfluid in said jacket, 3 a steam or vapor space above the level 2, 4 a pipe conveying the generated steam or vapor into the top 5 of a condenser 6, and 7 a space or tank at the bottom of said condenser. 8 indicates a connection from said tank 7 to the top side of a double impeller pump 9; 10 a pipe leading from the double impeller pump 9 back into the jacket, and 11 indicates branches of said pipe 10 to facilitate the circulation of the cooling fluid through the jacket 1. From the top of the jacket 1 beginning at the water level 2, is a connection 12 joined to a pi e 13 which communicates with the under side 14 of the impeller pum 9, as shown.

The operation 0 this invention will be clear from the foregoing, but may be briefly summarized as follows:

The level of the water in the jacket being brought to the point 2, steam or vapor will be generated and ass throu h the pipe 4 down into the con enser 6, w ere it will be brought to the liquid state and collected in the tank 7. From the tank 7 it will be pulled by the double impeller pump 9 through the pipe Sand forced throu h the pipe 10 back into the jacket. As the liquid is thus returned to the jacket and the level thereof brought to the connection 12 the said liquid will overflow into said pipe 13 and be brought to the under side 14 of the impeller pump 9, so that said under side of said pump will circulate the liquid around and around through the pipes 10 and 13 into and out of the jacket and said pump will maintain this circulation so long as there is enough liquid in the jacket to overflow into the pipe 13. Further, so lon as the flow of liquid from the tank 7 and ire-m the pipe 13 are about equal, the pressure on the top 15 of said pump and on the bottom 14 thereof will be about the same, and therefore the cooling action will be about the same in the jacket and in the condenser 6.

On the other hand, should the pressure in the pipe 13 rise higher than that in the pipe 8, the pressure at the point 16 in the pump 9 will overbalance the pressure from the pipe 8 in the upper compartment 15 of said pump, and thus will the liquid cease to be drawn from the tank 7 and only be circulated through the pi es 10 and 13. This ceasing of the flow 0 liquid from the tank 7 will cause steam to accumulate in the condenser 6 and condensed steam to accumulate in the tank 7, until the pressure in the pipe 8 again equals that in the pipe 13.

On the other hand, should the level in the jacket 1 decrease so that the liquid leaves the pipe 13, then the ump 9 can only pull liquid from the tank 7 with the result that the level inthe jacket 1 will rise sufiiciently as to again cause liquid to overflow into the pipe 13. In other words, it will now be clear that this system enables one to employ a single pump 9 and to maintain an equal circulation, or a balanced circulation, through the jacket and through the condenser. This is a feature of distmct advantage in systems for cooling internal combustion engines, because it insures at all times an efficient circulation around the cylinder walls, thus avoiding steam pockets and the over heatin of'the local spots.

In t e somewhat modified form of the invention illustrated in Figure 2, the operation and construction is substantially the same as thatdisclosed in Figure 1, but wlth the following changes: The lower portion of the condenser 6 is provided with a partition or diaphragm terminating in the tube or pipe 21 extending well below the liquid 22 in the tank 7, and a passage 23 inside the condenser is located outside said diaphragm 20 in order that it may serve as a vent for the system. The pipe 10 leading from the pump 9 into the jacket 1 instea of being ovided with the branches 11 shown in lhgure 1 is provided wlth the goose neck 25 and said goose neck is provided with a perforation 26 located somewhat above the normal level 2 of the liquid, which perforation not only prevents the goose neck from filling with liquid and thus acting as a siphon to empty the jacket back into the pump, but it also serves to receive steam from the space 3, which steam exerts an equal ressure on the fluid in both branches 0 the goose neck and thus aids to maintain the level of the liquid at the point 2. In the form illustrated in Figure'l, the double check valves 45 and 46 prevent the liquid from returnin to the pump 9. The provision of the diap ragm 20 and pipe 21- in the tank 7 enables the operator to collect and condense any alcoholic or other vapors which may have escaped condensation in the condenser 6, and the extension of the water passage 23 up to the top of the condenser 6 and connecting the'same with the vent opening 28 leading to the atmosphere enables the condenser 6 to automatically vent itself whenever the pressure gets too high therein. Of course, should it be desired to do so, the vent opening 28 may be valved as usual. The goose neck 25 has its lower end 30 terminated near the bottom of the jacket 1, and thus when the liquid is being circulated in the jacket an eflicient flow of the same through the acket is had, which sweeps out any steam pockets which may have formed. The jacket is provided with a filling opening 31 having a closure 32 which is on a level with the liquid in the jacket, and therefore prevents the jacket from being filled to a point higher than the level 2. In this way, is the steam space 3 always preserved in the jacket. The tank 7 furnishes a reserve water supply suflicient to always maintain the level of the li uid in the jacket at the point 2, and thus it compensatesior any. leakage or loss of fluid.

It is obvious-that those skilled in the art we as t e deta s of construction and the arrangement of parts without de arting from the spirit of the invention, and therefore itis not desired to-be limited to the above disclosure except as may be required.

thereby raising said level; condensing thevapor thus produced and returning the condensed liquid to said acket; circulating into and out of said jac et while said normal level of liquid is thus raised another portion of sai liquid; and automatically ceasing the circulationv ofsaid senond named portion of liquid when said normal level is not raised.

2. The process of coolin engine which consists in ing said jacket with a cooling liqu'idto a predetermined normal level; heating said liquid to its point of vaporization thereb raisin said level; condensing the vapor t us r need and returning the condensed liquid to said jacket; circulating into and out of said jacket while said normal level is raised another portion of said liquid; maintainin substantially equal the pressures on the sald two portions 0 liquid; and automatically ceasing the circulatlon of said second named portion of liquid when said normal level is not raised.

3. The process of coolin a jacket of an engine which consists in ling said jacket with a cooling liquid to a predetermined normal level; intermittently heatin said liquid to its point of vaporization, t ereby intermittently raising said liquid level; condensing the vapor thus produced and forcibly returning the condensed liquid'to said jacket; forcibl circulating into and out of said jacket while said normal level is raised another portion of said liquid; automatically ceasing the circulation of said second named portion of liquid when said normal level is not raised; and conducting vapor to said condensed liquid when the circulation of said second named portion of liquid ceases.

ation of this device as i eating a jacket of an i vided with means for filling the same with a cooling liquid to a normal level and with a vapor space above said level; a condenser connected to said vapor space; a double impeller pump having a plurality of compartments; a connection between said condenser and one of said compartments; a connection leading from the normal level of said liquid in said jacket between said jacket and another of said compartments; and a common connection between said compartments and said jacket, substantially as described.

6. In a cooling and condensing system for an engine, the combination of a jacket pro vided with means for filling the same with a cooling liquid to a normal level and with a vapor space above said level; a condenser connected to said vapor space; a tank associated with said condenser; a double impeller pump having a plurality of compartments; a connection between said tank and one of said compartments; a liquid circulating connection between the normal level of said jacket and another of said compartments; and a common connection between said compartments and said jacket, substantially as described.

7. In a coolin and condensing system for an internal com ustion engine the combination of a jacket provided with a cooling liquid; means for filling .said jacket to a predetermined normal level; a condenser for reducing to the liquid form vapors arising from said liquid; a double impeller pump; means for drawing condensed liquid from said condenser into said pump and forcing the same back into said jacket; means leading from the normal level of liquid in said jacket for drawing liquid from said jacket into said pump, and forcing it back into said jacket through the same channel as said condensed li uid; and means for delivering both quantities of liquid near the bottom of aid jacket, substantially as described.

J. In a cooling and condensing system for an internal combustion engine the combination of a jacket provided with a cooling liquid; means for filling said jacket to a predetermined normal level; a condenser for reducing to the liquid form vapors arising from said liquid; a double impeller pump; and connections between said condenser and said pump and leading from the normal level of liquid in said jacket to said pump by which one portion of liquid may be continuously returned to said jacket from said condenser while another portion of liquid may be circulated out of and into said jacket. substantially as described.

9. In a cooling and condensing system for internal combustion engines provided with a jacket, the combination of means to condense vapors evolved from said jacket comprising a tank; a diaphragm separating said tank from the condensing means; a vent for said tank; a pipe to return the condensed fluid to said jacket; a second pipe to lead cooling fluid out of said jacket; a third pipe to lead condensed fluid from said tank; an impelling means joined to said three pipes and adapted to maintain the pressures substantially equal in said second and third pipes, substantially as described.

10. In a cooling and condensing system for internal combustion engines provided with a jacket, the combination of means to fill said jacket to a predetermined normal level; means to condense vapors evolved from said jacket comprising a tank; a diaphragm separating said tank from the condensing means, and a vent for said tank; a pipe provided with a goose neck terminating near the bottom of said jacket to return the condensed fluid to said jacket; a second pipe to lead cooling fluid out of said jacket from the normal level thereof; a third pipe to lead condensed fluid from said tank; an impelling means joined to said three pipes, and adapted to maintain the pressures substantially equal in said second and third pipes, substantially as described.

11. In a cooling and condensing system for internal combustion engines, the combination of a acket for containing a cooling liquid; means to fill said jacket to a predetermined normal level; a cooler connected to said jacket; means adapted to contain an excess supply of cooling liquid; a pump connected to said cooler and to said excess supply of liquid; and means connected to said pump and to said acket at said normal level for limiting the level of said liquid in said jacket, substantially as described.

In testimony whereof I' aiiix my signature.

WELLINGTON W. MUIR.

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