US2395748A - Degasser for internal-combustion engines - Google Patents

Description

Feb. 26, 46. M. MALLORY ,2,395,748

DEGASSER FOR INTERNAL-.COMBUSTION ENGINES Filed Oct. 26, 1945 2 Sheets-Sheet 2 l Nv E NTO R Mar/0n Ma//ary DEGASSER FOR INTERNAL-COMBUSTION ENGINES u Marion Mallory, Detroit, Mich.

Application October' 26, 1945, Serial No. 624,750

(Cl. 12S-97) Claims.

This invention relates to a degasser for an internal combustion engine.

It is the object of this invention to produce such`a degasser which is of simple structure, efflcient and reliable in operation and easily installed on the engine as original or accessory equipment. This object is accomplished by means of a throttle valve in the intake passageway on the engine side of the carburetor throttle valve which is automatically closed in response to intake passageway pressure whenever the carburetor throttle valve is closed and the engine is operating above a given speed. The closing ci this valve causes substantially atmospheric pressure at the carburetor jets which stops the iiow oi fuel into the engine and at the same time -admits air into the intake manifold betweenthe engine and throttle valve to dilute any rich mixtures that might be trapped in themanifold on a sudden closing of the throttle valve, also reducing the vacuum over the pistons to reduce the drawing up of oil from the crank case into the combustion chamber.

Fig. i is a vertical section through my degasser assembled to the intake passageway.

Fig. 2 is a vertical section through a modiiied form of myv degasser.

Fig. 3 is a section through a modied'form of air bleed Valve mechanism.

The elements shown in the drawings are refer- ,ence'd as follows; intake passageway I, air inlet 2;', fuelbowlv 3, venturi d, main fuel nozzle 5, idle jets 5j?, throttle valve 8 of the butteriiy type, valve shaft 9, crank i0 fixed onshaft 9, rod by means of which throttle 8 is either manually or foot controlled, rod |3 pivotally connected at one end to crank iii and carrying valve It at its other end, voutlet i5 to the engine, passageway i6 connecting idle jets t and 'l into fuel pipe throttle valve i8 of the butterfly type fixed on shaft is, crank Z, rod 2| pivoted at one end to crank 2G and fixed at the other end to diaphragm 22 of suction device 23, conduit 2t connecting oriice 25 with orifice 26 in valve housing 27|, conduit 28 connecting orifice 29 with suction chamber 3@ oi suction device 23, compression spring @E tending to act through rod 2| to hold valve it open, valve 32 having circumferential groove 35i, rod 321i connecting valve 32 with flexible diaphragm 35 in suction device 35, compression spring 3i tending to move valve 32 downwardly, conduit 38 connecting suction chamber 39 with air bleed port iti and with conduit di, conduit t2 communicating with conduit it and with oriiice it on the engine side of valve It, centrifugal valve housing M, stationary housing 45 open to atmosphere through Iport 46, valve shaft lll which is driven off the engine so that it rotates in accordance with the speed of the engine, circumferential passageway 68, T passageway in shaft di continuously communicating with passageway it and with valve cylinder 5|), centrifugally unbalanced valve 5|, air bleed port 52 controlled by valve 5|, bypass passageway 53 permittingair to ow from port 52 to passageway i9 when valve 5| is open, tension spring 5t tending to hold valve 5| open.

The operation of my device is as follows: Throttle valve |8 is the conventional carburetor butteriiy throttle valve which, when in idle position, will permit suiiicient charge to flow through the intake passageway to run the engine at idle speed. Throttle valve i5, however, is arranged so that when in closed position it will substantially completely shut off intake passageway so that no fuel charge can pass by valve IB. Spring 54 is tensioned so that valve 5i will close air bleed port 52 whenever the engine exceeds a predetermined speed, such, for example, as 800 R. P. M. As shown in the drawings, ythrottle valve 8 is closed or in idle position and the engine is decelerating and running at a speed higher than, say, for example, about 800 R. P. M. In

other words, the vehicle is overrunning the engine. At this time stopper valve ifi has air speed d0 closed so that the intake passageway vacuum or suction at port i3 is established through conduits 42, lil and 38 in suction chamber 39, thereby causing suction device or servomotor 36 to raise valve 32 and place groove 33 in registry with ports 2s and 25. This permits the intake passageway vacuum at port 25 to become established in suction chamber 3|] which causes suction device 23, acting through rod 2i and crank 2B, to draw valve |8 tight1y.closed. When valve i8 closes completely, the pressure in intake passageway on the atmosphere side of valve I8, orspecically at jets 5, 5 and i, is atmospheric mosphere and thereby permit spring 3| to move valve I8 wide open. When valve I8 opens, then intake manifold vacuum is established on the engine side of throttle valve 8 at port 1 and air is again drawn through inlet 2 to thereby draw fuel out of idle jet 1 suicient to feed an idle charge to the engine. This will maintain the engine at idle speed.

When throttle valve 8 is open, then regardless of the engine speed, valve I4 will move clear of port 40 so that chamber 39 will bleed to atmosphere and valve 32 will be in lowered position to maintain groove 60 in communication with port 29 to thereby bleed port 30 to atmosphere and maintain valve I8 wide open.

In Fig. 1, the parts, such as valves 32, 5I, I4 are all shown to be in a position when the vehicle is being decelerated above 800 R. P. M.

In the moded form shown in Fig. 2, the elements which differ from the elements shown in Fig. 1 are referenced as follows: unbalanced valve 6I for completely closing oi intake passageway I, crank 64 having extension 63, tension spring 65 tending to hold valve 6I open, piston valve B6 connected by rod ,61 to flexible diaphragm 68, air bleed port 08 communicating by conduit l with port 1I, port 12 on the engine side of valve 6I communicating with port 13 by conduit 1l, circumferential passageway 15 in valve E6, rod 11 having abutment 18 arranged to contact extension 63 of crank 64, suction chamber 19icommnnicating by means of conduit 80 with conduit8I and passageway 48, and port 82 in the intake passageway.

In Fig. 2, the parts are: in a position when the vehicle is being decelerated above an engine speed of 800 R. P. M.

The operation of the modified form of my device is as follows: It is understood that valve El can .'be controlled by any conventional governor mechanisms such as the centrifugal weight type of governor or by the intake passageway suction as shown in my Patent 2,381,550. This invention can be used in commotion with the different types of speed governors. Valve 6I would be the engine speed governor valve and my invention vis simply applied to the engine speed governor. The important thing is that governor valve 6I is arranged so that, when the engine reaches its governed speed, valve 6I will move toward closed position to throttle the charge and maintain the engine at its governed speed in the manner of the conventional type governor. Assuming the engine was being decelerated from a speed above 800 R. P. M., throttle valve 8 would be closed, orifice 52 would be closed 'by piston valve I and conduit 40 would be closed. Suction then would establish in chamber 19 which would pull engine speed governor valve BI absolutely closed and cause piston valve 66 to permit air to flow into the manifold through conduit 14. Even though the throttle 8 remained closed and orifice 40 remained closed, the carbureting system would go back to normal before the engine ever reached an idle speed because port 52 would be opened by piston 5I and this would bleed air into suction chamber 19. Under such conditions piston valve 66 would move to the left to release valve 6I and close conduit 14 and y stalling of the engine is thereby prevented at idle or deceleration.

It is understood that my device can be used other than with a speed governor as shown in Figs. 1 and 2.

In the form of my invention shown in Fig. 1. I could use suction device 36 to directly open and close valve I8 and thereby omit suction device 23 and intermediate valve mechanism 32. However, I prefer the arrangement shown in Fig. l because considerable power is required to close valve I8l especially if it is opposed by a governor spring such as 65 in Fig. 2, and in such case servomotor 23 and its diaphragm 22 will be made considerably larger than servo-motor 30, which latter servo-motor simply serves as a remote controller for the larger servo-motor 23.

Instead of mechanically operating valve I4, I can operate .this valve, as shown in Fig. 3, by means of the intake passageway suction. As shown in Fig. 3, valve |00 controls air Ibleed i0 and is mounted in valve housing IOI which communicates with intake passageway I on the engine side of valve 8 through port |02. Valve I00 is provided with a circumferential groove |03 which normally communicates with port t0 and conduit 38 due to the action of compression spring |04. In this form of the invention when throttle valve 8 is closed or in idle position, the suction at orifice |02 causes valve I00 to shift to the left and close oi air bleed port 40. As soon as valve il is opened from idle position port |02 passes into the atmosphere and spring |04 moves valve IDI) to the right and thereby places circumferential groove I03 in communication with port D and conduit 38 to admit atmosphere into chamber 38.

I claim:

l. In an internal combustion engine'having an intake passageway and a throttle valve in said passageway, a vacuum operated fuel jet for delivering fuel into the intake passageway, a second throttle valve in said intake passageway on the engine side of said first mentioned throttle valve forgshutting off the ow of motive fluid to said engine when closed, means actuated through changes of pressure in the intake passageway on the engine side of said second throttle valve for imparting movement to said second throttle valve. an air bleed to atmosphere for said pressure actuated means, means for closing said air bleed whenever the first mentioned throttle valve is in substantially closed position, and a speed controlled air bleed to atmosphere for said pressure actuated means arranged to close whenever the engine reaches a predetermined speed whereby whendooth of said air bleeds are closed said pressure actuated means moves said second throttle' valve to closed position to thereby stop the -liovv of fuel from said jet into the intake passageway.

2. In an internall combustion engine having an -intake passageway `and a manually controlled throttle valve in said passageway, a vacuum operated fuel jet for delivering fuel into the intake passageway, a second throttle valve in said intake passageway on the engine side of said first mentioned throttle valve for shutting off the flow of motive uid to said engine when closed, means actuated through changes of pressure in the intake passageway on the engine side of said second throttle valve for imparting movement to said second throttle valve, an air bleed to atmosphere for said pressure actuated means, means for closing said air bleed whenever the first mentioned throttle valve is in substantially closed position, a second air bleed to atmosphere for said pressure actuated means, and a speed controlled centrifugal valve arranged to close said second air bleed whenever the engine reaches a predetermined speed whereby when said manual throttle valve is closed and the engine is running above said predetermined speed both of said air bleeds will be closed and said pressure actuated means will move said second throttle valve to closed position to thereby raise the pressure in the intake passageway on the atmosphere side of said second throttle valve to substantially atmospheric pressure and thereby stop the flow of fuel from said jet.

3. In an internal combustion engine having an intake passageway and a throttle valve in said passageway, a vacuum operated fuel jet for delivering fuel into the intake passageway, a second throttle valve in said intake passageway on the engine side of said rst mentioned throttle valve for shutting olf the flow of motive fluid to said engine when closed, means actuated through changes of pressure in the intake passageway on the engine side of said second throttle valve for imparting movement to said second throttle valve, an air bleed to atmosphere for said pressure actuated means, a valve for closing said air bleed, a connection between said air bleed valve and the rst mentioned throttle v alve whereby said air bleed valve is closed whenever the throttle valve is in idle position, and a speed controlled air bleed to atmosphere for said pressure actuated means arranged to close whenever the engine reaches a predetermined speed whereby when both of said air bleeds are closed said pressure actuated means moves said second throttle valve to closed position to thereby stop the ow of fuel from said jet into the intake passageway.

4. In an internal combustion engine having an intake passageway and a manually controlled throttle valve in said passageway, a vacuum operated fuel jet for delivering fuel into the intake passageway, a second throttle valve in said intake passageway on the engine side of said rst mentioned throttle valve for shutting off the ow of motive fluid to said engine when closed, means actuated through changes of. pressure in the i-ntake passageway on the engine side of said second throttle valve for imparting movement to said second throttle valve, an air bleed to atmosphere for said pressure actuated means, a valve for closing said air bleed, a connection between said air bleed valve and the manual throttle valve whereby said air bleed is closed whenever the manual throttle valve is in idle position, a second air bleed to atmosphere for said pressure actuated means, and a speed controlled cenering fuel into the intake passageway, a speed governor throttlevalve in said intake passagey way on the engine side of said first mentioned trifugal valve arranged to close said second air bleed whenever the engine reaches a predetermined speed whereby when said manual throttle valve is closed and the engine is running above said predetermined speed both of said air bleeds vwill be closed and said pressure actuated means will move said second throttle valve to closed Iposition to thereby raise the pressure in the intake passageway on the atmosphere side of said second throttle valve to substantially atmospheric pressure and thereby stop the flow of .fuel

passageway, a vacuum operated fuel jet for delivthrottle valve adapted to move toward closed position whenever the engine reaches its governed speed, means actuated througlrchanges of pressure in the intake passageway on the engine side of said governor throttle valve for imparting movement to said governor throttle valve, an air bleed to atmosphere for said pressure actuated means, means for closing said air bleed whenever the first mentioned throttle valve is in substantially closed position, and a speed controlled air bleed to atmosphere for said pressure actuated means arranged to close whenever the engine reaches a predetermined speed whereby when both of said air bleeds are closed said pressure actuated means moves said governor. throttle valve to closed position to thereby stop the flow of fuel from said jet into the intake passageway.

'7. In an internal combustion engine having an intake passageway and a manually controlled throttle valve in said passageway, a vacuum operated fuel'jet for delivering fuel into the intake passageway, a speed controlled governor throttle valve in said passageway on the engine side of said manually controlled throttle valve and adapted to move toward closed position whenever the engine reaches its governed speed, means actuated through changes of pressure in the intake passageway on the engine side of said governor throttle valve for imparting movement to said governor throttle valve, an air bleed to atmosphere for said pressure actuated means, means for closing said air bleed whenever the first mentioned throttle valve is in substantially closed position, a second-air bleed to atmosphere for said pressure actuated means, and a speed controlled centrifugal valve arranged to close said second air bleed whenever the engine reaches a predetermined speed whereby when said manual throttle valve is closed and the engine'is running above said predetermined speed both of said air bleeds will be closed and said pressure actuated means will move said second throttle valve to closed position to thereby raise the pressure in the intake passageway on the atmosphere side of said second throttle valve to substantially atmospheric pressure and thereby stop the flow of fuel from said liet.-l

81. In an internal combustion engine having an intake passageway and a throttle valve in said passageway, a vacuum operated fuel jet for delivering fuel into the intake passageway, a speed controlled governor throttle valve in said intake passageway on the engin'e side of said rst mentioned throttle valve and adapted to m'ove toward clcsedposition whenever` the engine reaches its governedv speed, meansactuated through changes of pressure in the int yke passageway 'on the engine side of said governor throttle valve for imparting movement to said governor throttle' valve, an air bleed to atmosphere for said pressure actuated means, a valve for closing said -air bleed, a connection between said air bleed valve and the rst mentioned throttle valve whereby said air bleed valve is closed whenever the throttle valve is in idle position, and a speed controlled air bleed to atmosphere for said pressure actuated means arranged to close whenever the engine reaches a predetermined speed where- .by when both of said air bleeds are closed said `pressure actuated means moves said governor throttle' valve to closed position to thereby stop the flow of fuel from said jet into the intake passageway.

9. In an internal combustion engine having an intake passageway and a manually operated throttle valve in said passageway, a vacuum operated fuel jet for delivering fuel into the intake passageway, a speed controlled governor throttle valve in the intake` passageway on the engine side of said first mentioned throttle valve and adapted to move toward closed position when ever the engine reaches itsgoverned speed, means actuated through changes of pressure in the intake passageway on the engine side of said governor throttle valve for imparting movement to said governor throttle valve, an air bleed to atmosphere for said pressure actuated means, a valve for closing said air bleed, a connection between said air bleed valve and the manual throt` tle valve whereby said air bleed valve is closed whenever the manual throttle valve is in idle position, a second air bleed to atmosphere for said l0. In an internal combustion engine having an intake passageway and a throttle valve in said passageway, a vacuum operated fuel jet for delivering fuel into the intake passageway, a second throttle valve in said intake passageway on the' engine side of said first mentioned throttle valve for shutting ori the flow of motive fluid to said engine when closed, means actuated through changes of pressure in the intake passageway on the engine side of said second throttle valve for imparting movement to said second throttle valve, an air bleed to atmosphere for said pressure actuated means, a valve for controlling said air bleed, a second means actuated through changes of pressure in the intake passageway on the engine side of said second throttle valve for imparting movement to said air bleed valve, an air bleed to atmosphere for said second pressure actuated means, means for closing said second air bleed whenever the first mentioned throttle valve is in substantially closed position, and a speed Y controlled air bleed to atmosphere for said second pressure actuated means arranged to close whenever the engine reaches a predetermined speed whereby when said second air bleed and speed controlled air bleed are closed said second pressure actuated means moves said first air bleed valve to closed position to thereby cause said first pressure actuated means to respond to intake passageway pressure and thereby close said second throttle valve which stops the flow of fuel from said jet into the intake passageway.

MARION tirar-triomf.

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