US1797838A

US1797838A - Ignition device

Info

Publication number: US1797838A
Application number: US380124A
Authority: US
Inventors: Frank H Prescott
Original assignee: Delco Remy Corp
Current assignee: Delco Remy Corp
Priority date: 1929-07-22
Filing date: 1929-07-22
Publication date: 1931-03-24
Anticipated expiration: 1948-03-24

Description

March 24, 1931. F- H, PRESCQTT 1,797,838

IGNITION DEVICE Filed July 22,1929 2 sheets-sheet 2 fag. 2.

Patented Mar. 24, 1931 UNITED ISTATES.-g

`,PATENT OFFICE FRANK n. rEEsco'r'Eor ANDERSON, INDIANA,-Ass1GNoE 'ro DELco-EEMY CORPORA- TIoN, or ANDERSON,l INDIANA, A CORPORATION or DELAWARE r.

d cordance with variations Application mea July 22,

This invention relates to improvements in ignition apparatus for internal combustion engines, said ignition apparatus comprising a timer adapted to be adjusted automatically to vary the time of Ysparking impulses in acconditions.

I t is among the objects of the present invention to modify the action of the ignition adjusting means in accordance' with the setting of the engine fuel supply device in either its engine starting or engine running position.

Another object of the present invention is to provide means operable concurrently to adjust the engine fuel supply .device to provide a comparatively rich mixture for engine starting purposes and to modify the action of the ignition device adjusting means whereby the time of sparking impulses for engine starting purposes will be substantially retarded. y Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawings,wherein a preferred embodiment of one form of the present invention is clearly shown.

In the drawings:

Fig. 1 is a fragmentary sectional view; partly diagrammatic, showing the ignition device,`its adjusting mechanism and the engine fuel supply device withrits component f Fig. 2 is a modified form of the present in ventionshowing the means for modifying the action of thev ignition device adjusting means as a part of the fuel supply device controlling means.

Fig. 3 is a fragmentary sectional view taken .along the line 3-s-3 of Fig. 2.

Fig. 4 is a view showing g a second modified form of the control device.

Referring to the drawings, and vmore particularly `to the Fig. 1 thereof, the numeral 20 designates a portion of the engine intake pipe which communicates, through the engine manifold, not shown, with the combustion chanbers of the engine. Pipe'20 has a tubular extension 2 1 which forms the air intake in engine operating v .iIoNrrIoN DEvrcE 1929. Serial No. 380,124.

pipe for the fuel mixture supply device comprising suitable fuel nozzles and a fuel reservoir, not shown, but associated with pipes 20 and 21 in the ordinary manner. The dotted line 21a indicates the air and fuel mixture passage, which has a choke-valve 23 provided therein, adjacentithe end 22 opening to atmosphere. Choke valve 23 is supported upon "a shaft 24S-extending transversely across the air intake passage, and journalled in the opposite wall portions of pipe 21, one end of said shaft extending outside said pipe -21 and having the operating lever 25 attached thereto by screw 26. j Within the passage in pipe 20 there is provided a throttle valve 27, whichlis adapted to vcontrol the introduction of fuel and air mixture into the engine by the Operation of the throttle lever 28, secured to the outside of the shaft 29 upon which the throttle 27 is car# ried. The pipe 20 has a transverse passage 30 providing communication between atmosthrottle 27 is positioned, which passage is in communication with said engine suction.

Passage 30 is adapted to receive a tubular Aextension 3l of the control valve 32, which comprises "the housing 33 having a through passage 34 in communication with the `pas- Alb.

sage 35 of the tubular extension 31.

other passage 36,oflset from, or out of alignment with the passage 35, is provided in the housing 33. Within the vpassage 34 ofthe housing 33 a plunger valve 37 is slidably supported, said plunger valve having an elongated, annular fg'roove 38 which forms` a chamber within the passage 34,` said chainber, being adapted to provide communication between

passages

35 and 36 when the plunger valve 37 is moved into the position as shown in the Fig. 1. The plunger valve 37, has one vend of a Bowden wire 39 secured thereto, said Bowden wire also being secured to the operating lever 25 of the choke valve 23. g5

The Bowden wire-39 extends toany suitable location -sothat the operator may readily grasp the same to operate it. An armored tubing 40 'has one end extending into the passage 34 of housing 33, the other end of said tubing beingl supported attached to housing 21.-

From the aforegoing it may be seen that operation of the Bowden wire 39 in one direction will open the choke-valve 23 and will move the slide valve 37 so that the annular groove 38 forming a chamber within passage 34 will provide communication between pas`

sages

35 and 36. When the Bowden wire 39 is operated in the opposite direction, the choke valve 23 will be moved to close the airv intake pipe 21 ,and likewise plunger valve' 37 will be moved so that the annular groove 38 will no more provide communication between t-he

passages

35 and 36, another portion of the slide valve 37 substantially closing said passages. 'l

The ignition apparatus for the internal combustion engine comprises a timer 50, hav-` ing a housing 51 in which an interrupter supby a bracket 41 `porting plate 52 is rotatably supported.

Plate 52 has an arm 53 extending outside the circular housing 51 and into the cylinder 54, which ma be attached to or be formed integral wit the circular housing 51. The interrupter supported on plate 52 comprises a stationary contact 55 supported by bracket 56, which is attached to the. plate 52 in any suitable manner, and grounded through said plate. A post 57 carried by the plate 52 pivotally supports the arm 58 upon the free end of which is carried the lcontact 59. A rubbing block 60 is attached to the arm 58 byA rivet 61, said rivet also securing oneend of the spring conductor 62 to .the arm.` The yother end of said spring conductor 62 is electrically connected with the terminal 63 which in turn is insulatingly supported by thehousing 51. A shaft 64 adapted to be driven by the engine in any suitable manner, is journalled in the housing 51, said shaft carrying a cam 65 provided with a plurality of lobes which are adapted to engage the rubbing block when the cam is rotated by engine operation, thus moving the contact- 59 out of enga-gement with the stationary contact 55.

The ignition coil of the ignition apparatus comprises a primary winding 70, having its one end connected to the terminal 63, the other end beingconnected to one side of the battery 7l, the opposite side of the battery bein grounded as at 72. The secondary win in 73 of the ignition coil is in electrical connection withithe high tension terminal 74 of the distributor. Thedistributor has terminals 75' adapted to be connected with the p respective cylinders of the engine, sparking impulses from the high tension terminal 74 by a rotor 76 supported upon the shaft 64 and driven thereby.

The cylinder 54 of the distributor housing i has

end caps

80 and 81 tightlyrclosing the cylinder ends. .End cap 8O has an interior eyelet 82 to which is attached one end of :a

spring 83, the other end of said spring being secured to the arm 53. Spring 83 normally urges the plate 52 in' a clockwise direction, or more specifically in a direction corresponding to the direction of rotation of cam 65, thus the effect of the spring 83 upon plate 52 is to retard the time of circuit interruptions at contacts 55 and 59 and thus retard the time of sparking impulses for the internal combustion engine. The cylinder 54 has a reciprocating piston 85 which is operatively connected with the arm 53 of the interrupter plate 52.` The cylinder space between the piston `85 and the cover cap 81 ism communicationwith a tube.86, one end thereof being supported or carried by the end cover cap 81, said tube having its opposite end extending into an enlarged 'portion v01E the passage., 36.

From the aforegoing it may be seen that during normal engine operation, or more specifically while the engine is operating with the choke valve 23 in the position as shown in Fig. 1, plunger valve 37 provides communication between

passages

35 and 36, which will consequently permit engine suction within the passage 21a tobe transmitted through passage 35, annular groove 38 formed in the plunger 37, passage 36, tube 86 to the interior of cylinder, 54, said suction after reaching a predetermined value causing the piston 85 to move toward the right as regards Fig. 1 against the effect of spring 83, there by rotating the plate 52 counter-clockwlse and thus advancing the time of circuit interruptions at contacts 55 and 59, thus advancing the time of sparking impulses for the engine. The amount of movement of piston 85 toward the right as regards Fig. 1 depends upon the degree'of suction' within the intake passage of the engine, or more specifically within the passage containing throttle valve 27.

When the engine is inoperative and no suction is being provided in the intake passage of the engine, spring 83 will move the ignition interrupter supportin plate 52 clockwise to retard the i ition evice.

To start the engine the operator will exert a .pull upon the Bowden wire control 39 the Bowden wire 29 will also move the plunger valve 37 into the passage 34 so that the upperv or solid end of the valve 37 w1ll be moved in front of the passage 36 and conbemg distributed to the various terminals l7 5 sequently communication between

passages

35 and 36 will be closed. A stop screw'46 substantially prevents movement of the plunger valve 37 beyond a proper point in either direction. The fuel mixture device is now set to provide a' comparatively rich mixture for starting purposes. Rotation of the en gine when the -iiuid mixture' supply device is so set will create a comparatively high vacuum within said fluid mixture supply device for'purposes of providing a rich mixture for the engine for starting purposes, said vacuum, however, not being transmittable to the-cylinder 54 inasmuch as the plunger valve 37 is ina position in which

passages

35 and 36 are not in communication, as has been described heretofore. N o 'suction being' exerted within the cylinder 54, spring 83 will adjust the timer substantiallyto fully vretarded position, thus the time of for the engine during the starting thereof, or more specifically while the fuel supply device.

is choked, will be practically, fully retarded.`

As soon as the engine has become self-operating, the Bowden wire 39 is Inoved in the opposite direction so that the ylever 2,5 is rotated clockwise, thus the air pipe will be fully opened bythe. movement' of the valve 23 into the positloniasshown in dotted lines in Fig. 1, the movement of the Bowden wire 39 concurrently moves the slide'valve 37 so that the annular groove 38 thereof providing a chamber- Within passage `34 will provide communication between

passages

35 and 36. Suction Within the fuel mixture device will now be transmitted through the )

passages

35 and 36 and tube 86 to the cylinder 54 operatadjusted properly to set the time of sparking impulses in accordance withengine opera tion. Increased suction in the fuel supply device will automatically advance the time of sparking impulses by moving the piston 85 toward the end of the Kcylinder 54 communieating with pipe 86. f

In the Fig. 2 the valve which controls communication between the suction chamber in vthe fluid supply device and the cylinder `54 comprises a portion of the choke valve.V In

` this instance the s toV aft 124, corresponding to the shaft 24 of the structure shown in Fig. 1 has one'end extending into an enlarged lug the housing portion 121, said portion of munication between the recesses 127 and 128, which recesses are adapted to receive tubes i 129 and 130 respectively communicating with the the cylinder 54 and they suction chamber 131 respectively. When the choke valve 123 is in position as shown in dotted lines inthe position a full air supplyv Fig. 2, in which is directed to the` intake passage of Athe i'enl glne, passage 126 of shaft 124 provides comjmunlcation between the cylinder 54 and the with pipes 129 and 130, thus spring 83 will be permitted to move the plate 52 to'spark retarding position. In this instance shaft 124 spar-king impulses Y `tions respectively. 1ng.=p1ston 85 so that the plate 52 will be the shaft 'having ,a transl verse passage 126'adapted to provide com-- valve 123 is ophas an operating lever 132-provided with a i' stud 133 having provisions vfor receiving the Bowden wire 139 so that said operating lever 132 may be secured to the Bowden wire.

In the Fig. 4 another modified form of the present invention is shown. In this instance the valve controlling communication between the cylinder 54 and the suction chamber 141 of the fuel supply device is mounted upon the fuel supply device adjacent the air intake end 142 thereof. Inthis casea housing 143 is provided having a through-passage 144 containing plunger valve 145, said plunger valve v145 being inl operating connection with the operating lever 146 of the shaft 147 upon which the choke vvalve 148 iscarried. Plunger valve 145 vhaving an annular groove 155 ,similar to plunger valve 37 of FigQl, may be choke valve 148 as well as the position of the plunger valve v145, lso that both valves' 145 and 148 may be concurrently opened or closed for engine running'or-engine starting condi- The present invention provides apparatus whereby when the engine is choked so thata substantially rich fuel mixture is provided. for starting purposes, the action of the ignition adjusting mechanism will be modified so that alretarded spark obtains. Opening of the choke valve for engine running conditions will move the control valve so as to subject the ignition adjusting means to engine suction whereby the ignition device will automatically be adjusted in accordance with engine suction conditions. While the form of embodiment of the :present invention, as herein disclosed, constitutes a preferred form, it is tocvbe understood that other forms might be adopted, all coming within the scope of the claims which follow- -What is claimed is as follows:

1'. In an'ignition device for an internal 'I A f means and to connect the ignition deviceadjusting means withthe carburetor.

In an ignition device for an internal combustion engine having an intake pipe, the

combi ation with a valve for controlling Ithe openin of said pipe; of an ignition device for said engine; means normally holding the' ignition device in spark retarding positionros ` and dependent upon engine suction for adjusting said device to advance the time` of sparking impulses; and'manually operable means adapted concurrently'.tooperate said valve to open the intake pipe and to render the aforementioned means effective to move tlie ignition device to advanC,G .i3he time of sparking impulses. f 3. In an ignition device for an internal combustion'engine having an intake pipe, the

combination with a valve for varying the opening of said pipe, of an ignition device for said engine; engine suction operated means for adjusting the ignition device out of normal, spark retarding position into a position to advance the' time :of sparking impulses; and manually operable meansl adapted concurrently to open the valve and to connect the adjusting means for the ignition device with the intake ppe of the engine.

4. In an ignition device forsanzinternalcombustion engine having an intake pipe, theI combination With a throttle valve for con" control valveformodifying the action of the suction operated means.

5. In an `ignition device for an internal.

combustion engine having `a carburetor provided Withan air intake port, the combinatarding position in accordance with enginel tion with a throttle valve for saidport; of an ignition device for said engine; nsuction controlled means automatically operable to move the ignition device out of normal, spark ref conditions to vary the time of sparking impulses; a plunger valve for connecting the.

suction controlled means with air intake pipes of the carburetor and means manually operable concurrently to adjust the throttle valve and operate the plunger valve to modify the action of the means for adjusting the ignition device. y f` 6. In an ignition device for an internal combustion engine having a carburetor provided 'With an air intake port, the combination with a throttle valve for said port.; of an ignition device for said engine; means automatically operable to adjust the ignition de-` vice in accordance With engine conditions to vary the time of sparking impulses; a control ,device for said means: and means operable concurrently -to close the throttle valve and operate the control device to control `the means for adjusting the ignition device so that said ignition device will be adjusted to fully retard the time of sparking impulses.

7.' In an ignition device for an internal combustion engine having a carburetor provided with an intake port, the coinbination with a throttle valve for controlling the opening of said port; of an ignition timer coinprising an interrupter and an engine driven cam for operating said interrupter; suction controlled means for varying the angular relation between the interrupter and cam in order to advance the time of sparking impulses; a manually operable member for controlling the i aforementioned means; and

means adapted concurrently to operate the throttle valve and the said member to modify Y the action of the aforementioned suction controlled imeans.

v8. In an ignition device for an internal combustion enginehaving a carburetor p rovided with an intake port, the combination with a throttle valve for controlling the opening of said port; of an ignition timer com prising an interrupter and an engine driven cam for operating said interrupter; a spring adaptedv to mov the interrupter relative to the cam fdr varyingthe angular relation between thel interrupter and cam so as to fully 'retard the time of sparking imp ulses; a suction operated apparatus including a piston adapted to move the interrupter toward spark time advancing position, a control valve adapted to be operated to connect the suction voperated apparatus with the intake of the carburetor; and common me'ans for control! ling the throttle andcontrol valves.

9. In an ignition device for an internal combustion engine'having a carburetor provided With an intake port, the combination With atlirottle-valve for controlling the opening'of said port; of an ignition timer comprisinganinterrupter and an engine vdriven cam for operating said interrupter; a spring adapted to move the interrupter relative to retard the time of sparking impulses; a suction operated apparatus including a piston adapted to move the interrupter toward spark time advancing position; a control valve adapted to be operated to connect thesuction operated apparatus with the intake of the carburetor; and acommonmember operable to open concurrently both throttle and control valves. i A .Y

10. In an ignitiondevice for an internal combustion engine having a carburetor provided With an intake conduit, the combinajusted to vary the time of sparking impulses; suction operated means for adjusting said ignition timer to advance the time of sparking impulses in accordance with engine operation; a choke-valve for said intake con duit, said choke'valve being adapted, when operated, to vary the opening of theintake conduit; a member for controlling the sucthe cam for varying the angular relation bev tween the interrupter and cam so as to fully tion with an ignition timer adapted to be adtion operated means; and manual means for simultaneously adj ustinrr the choke valve and said member to modify he action of the ignition device adjusting means in accordance with the position of the choke valve.

In testlmony whereof I hereto aix my signature.

FRANK H. PRESCOTT.