US1336457A - Ais-gooleb eob - Google Patents

Description

J. F. WITTMANN.

AIR COOLER FOR ENGINES.

APPLICATION FILED JUNE 2, 1919.

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Patented Apr. 13, 1920.

L- F. WITTMANN.

AIR COOLER FOR ENGINES.

APPLICATION FILED JUNE 2, 1919.

51,336,457. Patented Apr. 13, 1920.

2 SHEETSSHEET 2.

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A T7'ORNEX UNITED STA PATENT OFFICE.

JOKSHAN F. WITTMANN, OF ST. LOUIS, MISSOURI.

AIR-COOLER ENGINES.

Application filed June 2,

To all whom, it may concern:

F30 it known that l, JoksiIAN F. l rr'rnine, a citizen of the United States, residing at tit. Louis. State of li lissouri, have invented certain new and userul ln'iprovements in Air-Coolers for Engines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

The present invention is directed to improvements in air coolers for internal combustion engines, particularly those employed in connection with automobiles or self-propelled vehicles, the object of the in \ention being to substitute suitable air cooling means for the conventional radiators and water circulating systems so generally employed. The use of an air cooling system materially simplifies the structure, eliminates troublesome leaks, and at the same time reduces the weight by dispensing with the radiator. It possesses further and other advantages better apparent from the following detailed description of the invention in connection with the accompanying drawings in which- Figure 1 represents a side elevation of an automobile with part of thehood removed showing my invention applied to the engine of the car; Fig. 2 is an enlarged side elevation of the engine and invention applied thereto with parts broken away; Fig. 8 is a top plan of the air moving apparatus for circulating the air; Fig. 4 is an enlarged front elevation of the air moving apparatus; Fig. 5 is an enlarged side elevation of the same; and Fig. 6 is a middlev Vertical transverse section on the line 6-6 of Fig. 1.

Referring to the drawings, A, represents an automobile provided with an engine E, the cylinders 1 whereof are surrounded by an air jacket .9, for the circulation of the cooling medium or air employed under the present system. Tapping the inner side wall of the jacket at the middle and near the bottom thereof is one end of a circulating pipe or conduit 2, the opposite end of the pipe connecting to the fan or blower casing 3 mounted at the front of the car, said casing being provided with a fan or blower 4i mounted on a shaft 5. Tapping the top of the jacket 3 at the front end is one end of a circulating pipe or conduit 6, the opposite end of the pipe connecting to the fan casing 7 provided with an exhaust fan 8 mounted on the shaft 5. The fan casings Specification of Letters Patent.

Patented Apr. 13, 1920.

1919. Serial No. 301,213.

3 and 7 are preferably made in sections or halves a, a, and a, a, respectively, the respective sections and casings being secured together by bolts I), b, as shown, and supported in front of the engine by the brackets 9, 9, mounted on the frame F of the chassis, the tops of the brackets being engaged by the angle pieces 1t", 10, bolted. to the fan casings. Any other method of securing the fan casings to the car could obviously be resorted to. The opposite faces of the fan casings are provided with bearings 11 for the partial support of the fan-shaft 5, said bearings being equipped with oil cups 12 for lubricating the shaft, the latter being provided with a belt-pulley 13 on the end adjacent the engine, said end being supported by a bracket (Z leading from the gear-case The fans a and 8 are secured to the shaft 5 by set screws 141 as shown (Fig. 6). The casing 3 is provided with a bottom in take leg 15, and a top discharge leg 16 to which the pipe 2 is directly coupled; and the casing 7 is provided with a top intake leg 17 to which the pipe (3 is coupled, and with a bottom discharge leg 18. The leg 15 is provided with an intake elbow 19 into which the outside air is directly drawn, the engine and fans being inclosed in a hood H 'preferablv provided at the front with screen H for filtering the air and excluding dust, dirt, and solid particles from the fan casings. In the present embodiment of the invention I provide the usual cam-shaft 20 of the engine with a belt-pulley 21 which is connected to the pulley 13 on the shaft 5 by a belt 22.

When the engine is running the pulley 13 is rapidly driven by the cam shaft, the fans l; and 8 being rapidly revolved in their respective casings. Atmospheric air is thereby sucked into the casing 3, through the elbow 19 (which is placed in front of the engine so as to get as large a complement of cool. air possible). and blown out of the leg 16 through the pipe, 2 and into the air jacket or space 8 around the engine cylinders. The air jacket 8. it is seen, thus takes the place of the well known water jacket, when water is used as a cooling medium. The cool air is forced through the air jacket around the engine cylinders by the blower -l, taking up the heat of the cylinders and is finally sucked out through the pipe 6 by the exhaust fan 8 into and through the casing 7, and finally is expelled through the leg circulation, the intake end of the 18. A constant and rapid circulation of air keeps the cylinders cool and is not subject to leaks as is the case where water is circulated through a radiator; and, of course, does not freeze in cold weather. It is ob vious of. course that one of the fans might be dispensed with so far as the invention is concerned, but in practice the arrangement here shown constitutes the most practical arrangement for accomplishing the results desired, and for bringing about an effective and positive circulation of the cooling me dium or air. The apparatus might be altered in many particulars without involving a departure from the nature or spirit of the invention. For example, as shown, only a single air-jacket surrounds the several cylinders of the engine; but obviously we may have a separate jacket foreach cylinder with suitable means for either establishing inter communication between the jackets, or a separate communication with the circulating conduits 2 and 6. or their equii-"alent. To maintain an effective and frictionless conduit 2 should be substantially diametrically opposite the intake elbow 19, and the discharge end thereof should tap the air-jacket at or near the bottom; the discharge end of the conduit 6 should be substantially diametrically opposite the exhaust leg 18, and the intake end thereof should tap the aiujaclmt at or near the top, the ca ings 3 and 7 being juxtaposed and the legs 15, i7, and l6, 18, being respectively diagonally op n-mite one another.

Having described my invention. what I claim is:

1. In combination with an internal com bustion'engine provided with cylinders, an air acket surrounding said cylinders, a fan blower mounted in front of the engine, means for supporting said engine and blower, a circulating pipe leading from the blower to the bottom of the air jacket, an exhaust fan mounted in front of the engine, an exhaust pipe leading from the'top of the air jacket to the exhaust fan, and driving means for said fans.

2. In combination with an internal coinbustion engine provided with cylinders, a frame supporting said engine, an air jacket surrounding said cylinders, a fan blower mounted in front of the engine, a bracket on the aforesaid frame for supporting said blower, a circulating pipe leading from the blower to the air jacket, an exhaust fan mounted in front of the engine and supported by th aforesaid bracket, an exhaust pipe leading from the air jacket to the exhaust fan, driving means for said fans, a hood inclosing the engine and fans, and a screen in front of the hood.

3. In an air cooling system for internalv combustion cylinder types of engines for self-propelled vehicles, an engine, an airjacket surrounding the cylinders thereof, a blower and easing therefor, a circulating conduit connecting the blower casing: with the bottom of the. air jacket, an exhaust fan and easing therefor,-a circulating exhaust conduit leading from the top of the air jacket to the casing of the exhaust fan an intake for the blower casing substantially diametrically opposite to the intake of the circulating conduit leading thercirom, an exhaust leg for the casing of the exha fan disposed substantially diametrically j A posite the discharge end of the circulating conduit leading therefrom, the casings of the blower and erhauster being juxtaposed, the intake leg of the former being d'i g onally opposite the intake leg of the latter, and the outlet leg of the blower being diagonally opposite the outlet of the exhauster, and means for driving the blower and exhaust fan from the engine aforesaid.

In testimony whereof I allix my signature in presence of two witnesses.

JOKSHAN 1*. WI'I'lh [AKN lVitnesses arr-L STAREK, ELSE M. Srnonn.

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