US1514445A - Intake-manifold heater - Google Patents

Description

Nov 4 A9244 W. G. DUNN INTAKE MANI FOLD HEATER 1925 2 Sheets-Sheet 1 K53 EM Filed Dec 10 wwwhoz w th two I NTAKE MANIFOLD HEATER Filed Dec. 10, 1923 2 Sheets-8heet 2 50 equipped with my invention.

: To all whom it may concern:

Patented Nov. 4,1924. V j 4 UNITED STATES PATENT OFFICE.

I e. nunn,. on 01.4 m, IOWA. I w I I v i 1' 7' I MAKE-MANIFOLD nm'rnn. Application filed December 1c, 1923. saris! no. erases.

Be it known that I, WmnmM-G. DUNN, a in Flg'. 1, and the insert and ex aust manicitizen of the United States, residing at fold at the opposite side of the motor. Clarinda, in the county of Page and State Figures 4 and 5 are 'vertical transverse of Iowa, have invented certain new and usesectional views through the invention, cut in ful Improvements in Intake-Manifold Heatplanes between the'front and rear pairs of rs; and I do declare the following to be a -c llnders of the motor, one view disclosing full, clear, and. exact description of the invention, such as will enable others skilled ,in the art to whichitappertains to make and use the same.

My invention r elates to improvements in .intake manifold heaters which provide what e travel of the shunted exhaust gases while the other indicates the return of such gases.- Figure 6 is a vertical sectional view on line 66 of Fig. 4, showing more particularly the construction of the insert.

Figure 7 is avertical transverse sectional is commonly known as a hot spot on-the view, illustrating a slightly different form manifold, into contact with which the gases of construction, in which the insert is not from the carburetor are directed, so as to employed. Q

heat such gases and increase their volatility i d, ffi i De i f thi ature have the numeral 1 designates an intake manifold heretofore been provided, but it isone ohwhich is substituted for the manifold preject of my invention to provide a unique lviously used on a well known type of interassociation of intake manifold, heater. and nal combustion motor, such as that indicatedcarbureter, all seciired together by a. single at 2. The lower side of the manifold 1 is set of bolts, the arrangement being such 'as' "formed with a gas inlet opening 3 and is to greatly elevate the carbureter over its flat around this opening, as indicated at 4.

usual position, with the advantage that the The manifold 1 is also formed with a flat ingoing gases have only a short traveland upper side 5 and is provided with vertical consequently cannot condense and partly rebolt holes 6 opening through the lower and turn to the carbureter. upper flat surfaces 4 and 5, sleeves 7 being Another object of the invention is to'proformed vertically across the interior of the vide a unique insert adapted primarily to be manifold, so that the bolt holes 6 may pass vintroduced between the cylinder head of a, through these sleeves and there will he no 4 motor and the exhaust nanifold, said insert danger of air leaks into the manifold. having a gas shunting passage for supplying hot exhaust gases to the heater above menits normal position and has its attaching and are drawn from the other by suction.

tioned, and also being provided with a reflange 9 disposed against the flat lower face turn passage for the shunted' ases, thear 4 o the manifold 1, so that the ingoin rangementbeing such that t e gases are gases need only travel a slight distance an forced through the one'passage b'ypressure. there isconsequently no danger of any of -these gases condensing and returning to the Yet another aim is to provide an attachcarbureter. An open-bottomed head 10 rests Figure 3 is a plan view of the arts shown In the drawings above briefly described,..

'-'Ihe usual carbureter 8 is elevated above ment for motors now in every day use which on the fiat upper face 5 of the manifold 1 will be simple and inexpensive, and maybe and receives exhaust gases from the motor, to

quickly and easily applied.

0 v heat the upper s'ide'of said manifold, di- With the foregoing in view, the invention rectly over the opening 3, so as to effectively resides inthe novel subject matter hereinheat the gases entering the motor. A single after described and claime'd,-the description set of bolts 11 pass through the bolt holes 6, being supplemented by Y the accompanying through feet 12 of the head 10 and through drawings, Y the attaching flange 9 of the carbureter 8, so 7 Figure 1 is a side elevation, partly in See-- that these bolts tightly tie the three parts tion showing a well known type of motor. 1, 8 and 10 together.

. I At the side of the motor, opposite the in- Figure 2 is a pers iective view showing the take manifold 1, is the exhaust manifold 13, assembly of the inta e manifold, carbureter, and in Fig. 7, I have illustrated a pipe 14 manifold heater, insert and connecting pipes tapped into. said manifold 13 and leading gases to the latter. From the head 10, a flexible exhaust pipe 15 leads and if desired may join the main exhaust pipe of the motor at a suitable point.

Instead of using the construction disclosed in -Fig. 7, it is preferable to employ that illustrated in the other figures. I provide a vertically elongated insert 16 which is adapted to be introduced between the cylinder head and the manifold 13, said insert having flat inner and outer sides to engage suitable gaskets (not shown) and having openings 17 aligning with the usual openings in the manifold and cylinder head, to receive attaching screws 18. The lower end portion of the insert 16 is formed with a main exhaust passage 19 which extends entiiely through the body and the upper end portion of said insert is hollow and its interior communicates with the passage 19, said interior being divided by a vertical partition 20, into' an exhaust gas shunting passage 21 and a return passage 22 for the shunted gases. The side wall of the passage 21, remote from the cylinder head, is formed with a depending lip 23 which joins to the partition 20 and serves to direct the outgoing exhaust gases, or rather some of these gases, upwardly into the passage 21. The opposite side wall of the return passage 22 is provided with a similar lip 2 1 which guards the passage 22 against the entrance of exhaust gases from the passage 19 and causes these gases to create a suction within said passage 22. A pipe 25 leads from the gas shunting passage 21, to the head 10, and another pipe 26 returns from said head to the gas return passage 22, and it will thus be seen that a continual circulation of hot exhaust gases will take place through the passage 21, pipe 25, head-10, pipe 26, and return passage 22. Thus, a hot spot is maintained at the top of the manifold 1, to effectively heat the gases entering the cylinder head.

It wil be seen from the foregoing, that I have provided a simple and inexpensive construction for utilizing some of the exhaust gases to heat a portion of the exhaust manifold and thus increase the volatility of the gases entering the cylinders, from the carbureter. It will alsobe noted that the invention may be easily installed and will necessitate few changes in the construction of the motor with which it is used. Attention may be directed to the fact however, that as the carbureter-8 is elevated, some changes must be made in the throttle control means, as indicated in Fig.1 In this view, a bracket 27 has been shown,zsecured to the motor base. Upon this bracket, a bell crank 28 is mounted and from this bell crank, a vertically elongated rod 29 leads to the throttle valve of the carbureter. An ac celerator rod 30 is connected with the bell thereof to open the throttle Valve to a greater or less extent.

Excellent results have been obtained from the details above described and they are therefore preferably followed, but within the scope of the invention as claimed, numerous minor changes may be made.

I claim:

1. The combination with an internal combustion engine having an exhaust manifold at one side of the cylinder head and an intake manifold at the opposite side of said head; of an open-bottomed casing secured upon the upper side of said intake manifold and closed by the latter, said casing extending above the cylinder head, a passage member communicating with the interior of the exhaust manifold and extending therefrom above the cylinder head, an exhaust gas passage extending over the cylinder head and connecting said passage member with said casing, and an exhaust gas outlet from'said casing.

'2. An attachment for internal combustion engines comprising a hollow head adapted to be secured on an intake manifold, an insert adapted for introduction into an exhaust gas passage, said insert having an haust gas shunting passage and a return passage forthe shunted exhaust gases, and

separate passages connecting said passages of the insert with said hollow head.

3. An attachment for internal combustion motors comprising an insert adapted to be introduced into an exhaust gas passage of a motor, said insert having an exhaust gas shunting passage and a return passage for the shunted gases, said. passages'bein'g adapted for connection with a heater to circulate th hot exhaust gases therethrough.

4. An attachment for internal combustion motors comprising an insert adapted to be introduced into an exhaust gas passage of a motor, said insert comprising an elongated body having a main exhaust gas passage opening therethrough at one end of the body, the other end of said body being hollow-and having its interior in communi- '5. An intake manifold having an inlet opening in its lower 'side and' a fiat face about said opening, said manifold also having a fiat upper face over said opening and vertical bolt holes opening through the flat upper and lower faces a carbureter an attaching flange contacting with the t lower face, a heater contacting with the flat upper and. bolts in said. bolt holes passing also through said flange and said heater 10 to secure the heater and carbureter to the manifold.

In testimony whereof I ve hereunto afmy v liiziufw;

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