US1953927A - Oil cooler - Google Patents

Description

April 10, 1934. T, P, CHA E 1,953,927

OIL COOLER Eii'ed March :51, 1950 2 Sheets-Sheet 1 April 10, 1934. CHASE 1,953,927

OIL COOLER Filed March 51. 1930 2 Sheets-Sheet 2 3% w W 1 a W am? Patented Apr. 10, 1934 UNITED STATES PATENT OFFICE 1,953,921 on. cootaa Application March 31, 1930, Serial No. 440,375

3 Claims.

It is an object of this invention to provide simple and practical means for a direct utilization of engine-cooling water in the cooling of lubricant oil; and preferred embodiments of this in vention may involve an innovation in the construction of air-cooled radiators employing vertical water tubes;some or all of said tubes being extended through an oil cooler incorporated in said radiator.

From a slightly difierent point of view, this invention may be said to contemplate an oil thermalizing unit which includes heat-exchange or oil tempering elements, such as the mentioned tubes, in which unit the oil is passed between numerous parallel partition plates adapted to function as fins upon said heat-exchange elements,--fins external to said unit and internal thereto being preferably similar but differently .spaced.

Other objects of this invention, which need involve no change in the external form or the general appearance of a radiator organization of a type currently applied to automotive vehicles (the mentioned oil-cooler unit being preferably with which the mentioned vertical or other tubes communicate by extending through parallel horizontal walls between which numerous heat conductive fin sheets are compactly disposed) may be best appreciated by the following description of an illustrative embodiment thereof, taken in connection with the appended claims and the accompanying drawings.

Figure 1 is a partial and diagrammatic side elevational view of an engine equipped with one form of a water cooling and oil cooling radiator organization illustrative of the present invention, parts being broken away.

Figure 2 is an enlarged partial sectional view, 4 with parts broken away, taken substantially as indicated by the line 22 of Figure 1.

Figure 3 is a partial section view, taken substantially as indicated by line 3-3 of Figure 2. ,Figures 4 and 5 are diagrammatic plan views. Referring to details of that embodiment of the present invention which has been chosen for purposes of illustration, an engine 11 is shown as provided with cooling-water conduits l3 and 12 respectively communicating with an upper tank 14 and a lower tank 15 comprised in a radiator organization 16 which includes parallel vertical tubes 1'7, extending between said tanks.

A pump 18 is shown as interposed in the conduit 12, to advance cooled water from the tank 15 to the engine 11; and an oil cooler unit 19 is disposed immediately above a lower water tankv shown as including an upper wall 20 and a lower wall 21, through both of which the tubes 17 extend in such manner that one of said walls may be regarded as common to said oil cooler and the lower water tank 15,--the tubes 1'? thus serving 50 as oil tempering elements.

In the present instance, the tubes 17 are shown as provided, externally of the cooler 19, with spaced horizontal plates or sheets 22, commonly soldered thereon and serving as air-cooled fins 5 to reduce the temperature of said tubes and that of the water descending therethrough; and those portions of said tubes which extend into and through the oil cooler 19 are shown as provided with similar but shorter and more closely 7 packed parallel partition sheets or plates 23, to serve as heat transferring fins-the length of the last-mentioned 'sheets or fins being such as to leave what may be termed header spaces or 'maniiold spaces 24 at the respective ends of the oil cooler.

In the illustrated cooler unit 19, the respective walls 20 and 21, through which the substantially parallel water-cooling and oil-tempering tubes 17 extend, are shown as horizontal and as formed 30 of metal sheets which are so stamped or drawn orotherwise cupped as to cooperate in incidentally providing parallel front and back walls 25 and 25' and end walls 26 and 2'7 of said unit,- the mentioned back wall 25' being shown as provided with an inlet fitting 28 and an outlet fitting 29 opposite which the fln sheets 23 may be specially shaped or slightly cut away as suggested at 30, Figure 2,-said sheets otherwise fitting snugly between walls 25 and 25'.

In assembling, so much of the described radiator structure as lies, during use, above the plate or wall 20 may be put together in any usual or preferred manner; and, whether or not the organization has been inverted or otherwise specially oriented favorably to the positioning of the plate wall 20 upon the projecting tubes 17, the fin sheets 23 may be assembled directly thereon,-slight annular bosses, not shown, but optionally formed adjacent the apertures and/or elsewhere incidentally to the aperturing of the sheets, being preferably relied upon suitably to space the same. The cupped or other lower" wall element 21 of oil cooler 19 may be then so applied as to leave fin sheets 23 compacted to a desired degree and the respective ends 17' of tubes 17 flush or projecting slightly therethrough; and a cupped or other bottom element 31, preferably adapted to receive the similarly no welding or other known means; but any solderterposed at some suitable ing within the oil cooler 19 may aim primarily at the promotion of heat interchange between mentioned parts. 4

Obviously either of the openings 28, 29 whether provided in a vertical wall 25 or elsewhere near the ends of the described unit, may serve as an inlet opening connected with any oilfeed conduit 32, the other opening of said'unit being then connected with any oil delivery conduit 33; and the latter may lead either to a suitable reservoir or directly to engine bearings, as desired. In

the latter case, a pump interposed at any suitable point, as at 34, may serve not only to advance the oil through the described cooler but to deliver the same therefrom under a predetermined pressure. The relatively large crosssectional area of the cooler, .and the very ex-.

tensive heat-transfer surface provided therein by the fin sheets 23, between whose closely-opposed surfaces the oil must pass, are favorable to the capacity and efliciency of the described cooler,- preventing any stagnation of chilled superficial layers of oil; and, if desired, a pressure-limiting by-pass return conduit 36 shown as controlled by an adjustable valve at 37, may be interposed between the conduit 32, and a sump or other reservoir 38. A similar return conduit 39, valved at 40, is shown as conditionally connecting conduit 33 with sump 38. The valve 37 being set at a little higher pressure than valve 40, when both are used, the oil brought to an optimum condition from either direction, may be advanced to any pressure conduits 41, leading to bearings 42, either under an invariable bearing pressure or under a pressure varied by manual or other manipulation of valve 40,-adjusted with reference to thermal or other conditions; and excess oil, if pumped, may be returned to reservoir 38'via either conduit 36 or conduit 39, a filter unit (not shown) being optionally inpoint.

One advantageous mode of operation of all mentioned parts has been clearly indicated in connection with the description thereof; and, a1- though said description has included but one complete embodiment of the present invention, it will be understood not only that various features thereof might be independently employed but also suggests that pipes 32a and 33a, through which oil is sent to and from cooler 19a by pump 34a, may

be connected only with a reservoir such as a sump 38a, any desired additional means, such as a pump 34a, being used to deliver the tempered oil to bearings 42a via pipe 41a; and Figure 5 suggests adaptation of a single pump 34b to serve the functions of both of the pumps 34a and 34a,as by interposition of a pressure relief valve 43a in such a manner that, delivery of oil to bearings 42b being always provided for by pipe 41b, excess oil may be conditionally circulated through "cooler 19b via conduits 33b and 320; but the systems last referred to are obviously capable of use with other coolers.

I claim:

1. In an engine and lubricant cooling system: a tank comprised in a radiator organization for cooling water for an automotive vehicle engine, said tank having a set of water cooling tubes extending through a wall thereof; and an oil cooling chamber provided with an inlet and an outlet enclosing portions of said tubes, said chamber being subdivided by parallel heat-transferring partitions between which said oil is advanced from said inlet to said outlet.

2. In an engine lubricating system: a lubricant conditioning chamber provided with an inlet and an outlet spaced apart; parallel tempering elements extending inwardly through a wall of said chamber; and spaced heat-transfer means disposed in parallel upon said elements within said chamber, said heat-transfer means being partition plates which are so arranged as to provide header spaces opposite said inlet and said outlet.

3. Apparatus for cooling the engine cooling liquid and regulating the temperature of the lubricant of a. liquid cooled internal combustion engine including means defining passages through which

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