US1799407A - Thermostatic control for auxiliary-air devices - Google Patents

Description

. April 7, 1931.

G. A. BRUNELLE ET AL THERMOSTATIC CONTROL FIOR AUXILIARY AIR DEVICES Filed Feb.

BY ATTORNEYS.

INVENTCR as'ralv A Bea/vs; 4 CAM/L4: BIPwvsz-r;

Patented Apr. 7, 1931 uni-TED "STAT S i j AsTonA. BRUNELLE AND CAMILLE BRUNEEL, or sANrnANoIsco, oAmFoRNrA THnRMosTATio CONTROL non AUXILItARY-AIR DEVICES I Applicatidn filed February 12, 1927. Seria1 No. 1 6"7,"? 7 6.

This invention relates to auxiliary air supplying and mixing devices, such as are used with internal combustion motors, and refers more particularly to application Serial N 0. 122,411, filed by GastonA. Brunelle, July 14, 1926. a i I One of the objects of this invention is to improve 'upon the device, described by above mentioned application, thatwill respond to engine speed and regulate the auxiliary air intakeproportionally. y t V This invention. is designed and constructed to accomplish this by admitting more air at high speed and cutting down the auxiliary air at low speed, thereby giving a bettercarbureting eifect', which in turn means a more economical and eflicient engine.

A particular advantage of the device. resides in the fact that hot air isfadmitted as auxiliary air instead of cold air. This will cause a better mixture than cold air andgwill help to pick up and volatilize that raw gas that tends to accumulate in the low points'in the manifoldi' 1 v A further advantage is a thermal control unit that operates in connection with the. auxiliary air intakeport and regulates it acc ing to the heat of the engine. ,j

The combination. of the auxiliary air intakeport withthe thermal control unit and the admission of preheated airintol theintake manifold, furnishes a combinationthat is new and produces effects that are highly satisfactory in regard to economy and power.

It is observedfrom the foregoingthat'a resultant effect, coming from acombination of the speed of the engine, and the heat of the engine, is utilized to control the auxil- V iary .pre-heated air admitted to the intake manifold. V

v It is to be understood that this auxiliary air is admitted to the intake'manifold between the carburetor and the intake valves, and when so admitted augments the air content ofthe mixture andconsequently rarefies the mixture. This isdesirable atcertain engine speeds and heats and is automatically obtained by our invention. 1

The above advantages, together with any and all subsequent ones developed by the description, constitute'our invention which is disclosed by the accompanying drawings. -Inthedr'awingsz w f Figure 1 shows the invention as applied to anengine'; a o

Figure 21' shows a section on line 2-2 of Fiurelf f p igure 3 shows any enlarged'section' ofthe, thermal control'u'nit. j

Referring now in detail to the drawings, in which 1 represents the intake manifold of the engine and 2 the exhaust manifold. Surrounding 1 and 21s a sheath like member 7 3, which is held to-the engine 4 by. the head bolt as at 5, and the manifold bolts, as at 5" and 5"; This sheath likemember is shaped to form'an' oven opened atthe lower side as at 7 to slip over the intake manifold. Mount-- ed'f'o'n thetop side 8 of the member 3 is a 'chamberfdesignated 9 in its. entirety. Suitably connected at one end tothe chamber 9 a'connection 1,0, the other end of which suitably joinstheflanged member ll. In,

vthis case the connection used is tubing, but

maybe flexible as the occasion demands.

lhe flan'ged' member 111 is interposed be tween the carburetor 12 andthe intake manifold 1. g It is found more convenient to introduce'it as a flanged member,but it'inay also be brought into the intake mani'foldby means of an opening in. the walls ofthe manifold anywhere between the carburetor and the pointwhere the manifold branches to go to the cylinder portsi :The thermal control unit generally desi'gnated 9 is composed ofan upper plate 13 and a'lower plate 14,.which plate 14 is also the top 7 plate of thefheating oven. Flangedly connected asat 15 to the upper plate 13 is a sleeve M merit of the entire valve.

to join plate 14 as at 17 This construction furnishes the casing. The top plate 13 is provided with an outlet opening 18, which is screw threaded as at 19 and takes a standard coupling 20, which in turnjoins the aforementioned pipe 10. I

Depending from plate' 13 and below the opening 18 is provided a unit generally designated 21, which is screw threaded and joined to plate 13 as at 22. Contained within this unit is a valve member 23 shaped to fit into the seat 24, which seat is a part of the unit 21. An annular space 25 is provided by malting the diameter of the valve stem 26 smaller than that of the opening 27 in the member 21. A flange 28 formed on the bottom of the stem 26 serves as a stop for the upward move- Sma-ll protuberances 29 prevent the flange 28 from seating and permit air to pass upthrough the annular space 25, although the valve is fully l' te Provided within valve 23 is another valve 30 with a seat 31, cut in the valve 23 itself.

I This valve 30 is also provided with a stem .32, the diameter .of which is less than that of opening 33, providing a second annular space 34. Fixed to the lower end of the stem is a flange which flange upon rising engages small protuberances 36 which hold it from, sealing the annular air passage, thus providing a second additional air passage when both valve members are fully lifted by the suction fromthe cylinders.

In operation the larger valve lifts first, carryi with it the smaller valve inoperative. pon increased demand for more air thesmaller valve automatically rises, admittinIgai-r through the second annular space.

I pending ilom21 is a hollow tubular member 37, provided with a flange 38. The flange 38 acts as a bafllefor retarding the flow of air into the u )per part of the sleeve 16,

Just above the flange 38 are provided open ings 39 and 4.0 in the walls of the tubular member 37. Fixed to the bottom plate 14 is a thermalexpansion unit generally designated 41, the design of which is more or less standard, and does not enter here except that it is provided with a top surface 42, which receives the full travel of the expansion, At-,

inched to this late substantially in the center is a screw t n'eaded fixture 43 into which is screwed apin44 hollowed at the upper n as a 45.- a

a Heles 46 and 47 are cut the walls of the hollowed portion in such a manner as to coincide. with holes 39 and vrespectively.

These holes 46 and 4'? are larger in' diameter than holes 39 and 40 and are so placedthat a p rt on f h holes 3 d 4 s 4 and 47, c ncid henhe the s a is c ld and the r er d am t r is t e le h h rm stat a long r movem nt and st ll keep the hate lignment.- F om this it is e ident that an opening always exists, but is small when the engine is cold, and fully opened when the engine is hot.

In Figure 3 is exemplified a condition where the thermostat has responded to heat and pushed the pin 44 up into the tubular member 37, until the holes 46 and 47 coincide with the holes 39 and 40 respectively, thereby fully opening an air passage to the interior of 37. The hot air then would rush in through openings 48 in the bottom plate 14, which is also the top of the oven, past the flange 38, which is a loose lit in the cylinder and acts as a baffle, and through the openings 39 and 40 on into the interior of the tubular member 37.' From there it passes through the valves 23, and during high speeds of the engine also valve 30, and on through the connection 10 to the flange 11.

' Provided in flange 11 is a bafile plate 49, which serves as breaker. As the mixture composed. of linely divided gasoline globules carried in suspension is swept along the manifold tube, and as the auxiliary air is admitted to this stream just in front of this baffle plate it is easy to conceive that a much better mixture is obtained by causing a disturbance at the point where the air is admitted. It not only causes the mixture to become more rarefied, but it tends to make a more uniform mixture since the globules are broken into more minute parts and the new air is thoroughly stirred in by the disturba ce- I The accompanying drawings show one embodiment of our invention and since it is possible to apply it in various ways we unf derstand we are entitled to such modifications and, variations as do not depart from the scope of the description and appended claims. 1

We claim: v

1. A device of the type described, comprising in combination an exhaust pipe, a heating ,oven surrounding said pipe, means disposed the top of said oven for receiving heated air from the oven, an intake manifold, communications between said means and said manifold for conveying heated air to said manifold, said. manifold having a large opening for receiving theheated air, and a bafile plate dispoSGfi adjacent to said opening and on the side nearest the engine intake ports, and extending part way into the manifold.

2. A temperature controlled suction-actuated air inlet device comprising an oven for enclosingthe exhaust pipe of an engine, a chamber for receiving heated air from the even, a thermostat mounted in said chamber and affected by the heated air, a conduit for carrying the heated air from the ,oven to the intakemanifdd and a valve actuated by said thermostat for permitting a greater vquantity th eted a to ent r aid c nduit s th a perature of the air increases.

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