US1626364A

US1626364A - Engine

Info

Publication number: US1626364A
Application number: US688323A
Authority: US
Inventors: Frank F Starr
Original assignee: Individual
Current assignee: Delco Light Co
Priority date: 1924-01-24
Filing date: 1924-01-24
Publication date: 1927-04-26
Anticipated expiration: 1944-04-26

Description

F. F. STARR April 26 1927.

ENGINE Filed Jan. 24, 1924 4 Sheets-Sheet 1 JETUEHZET' W ,SQAMLQQ April 26, 1927.-

F. F. STARR ENGINE 4 Sheets-Sheet 2 Filed Jan. 24. 1924 Juarez-1157' April 26 1927. 1,626,364

F. F. STARR ENGINE Filed Jan. 24, 1924 4 Sheets-Sheet 3 fnUEn Z'EF UPIIE 5- STARR ENGIN pril 26, 192';

Filed Jan. 24, 1924 Sheets-Sheet 4 /r Eu H35 HES 8/ W SM+H W I Patented Apr. 26, 1927.

entr es srarus mam FRANK F. STARR, OF DAYTON, OHIO, ASSIGNOR TO DELCO-LIGHT COMPANY, OF DAYTON, OHIO, A CORPORATION OF DELAWARE.

ENGINE.

Application filed January 24, 1924. Serial 160. 688,323.

This invention relates to internal combustion engines. and one of the chief objects of I In order to accomplish this object one.

form of the invention provides a structure which may be assembled together as a unit before it is attached to the engine frame. This structure includes a cam shaft adapted to he driven by the engine, valve operating cams and ignition timer and "a fuel pump all driven by the cam shaft. These parts are all supported by acanushaft bearing which is received by the engine frame and secured thercto..the frame and bearing being adapted so that the entire unit may be removed from the engine without disassembling other parts thereof. This unitary structure in eludes also an electric .throttle governor which may be readily-attached to the operating arm of a. throttle valve adjacent the engine intake.

2 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 form of the presentv invention is 0 clearly shown. 1

i In the drawings Fig. 1 is a view partly in elevation and partly in section of an. engine provided in the present inventiona a I Fig. 2 is a perspective view of an engine valve cam shaft timer-govern r-pump unit embodying the present invention.

Fig. 3 is a longitudinal sectional view. thereof. a Fi 4 is a view of one of the gears shown in Fig. 3.

- Fig. 5 is a view of the timer taken on the line 5-5 of Fig. 3.

Fig. 6 is a (plan view of the fuel pump. Figs. 7 an 8 are fragmentarysectional views taken on the lines 77 and 8-8 respectively of Fig. 6.

Fig. 9 is a longitudinal sectional view of the electric throttle governor.-

-0 -En i-ne cam aIz-aft-timer-punz-p-gooemor unit.

In the drawings 20 designates an internal combustion engine including a crank case 21 mounted on a base 22. .'The crank case 21 supports an engine cylinder 23 cooperat mg with a piston 24 which is connected by a rod 25 with'a crank 26 which rotates about crank shaft 27. Shaft 27 drives

gears

28 and 29 forsplash lubricating the moving parts located within the case 21. The engine includes valves operated by mechanism of theoverhead rocker arm type, not shown, these rocker arms being operated by push rods 30 and 31 shown in Fig. 1.

The engine intake 32 is connected with a carburetor 33 having a butterfly throttle valve mounted on a spindle 34 which is operated by an arm 35.

Numeral 40 designates in its entirely a unit which is driven by the engine for operating the push rods 31 and 30 for timing the engine ignition, for pumping fuel from a tank to carburetor 33 and for controlling the engine throttle. The unit 40 comprises a frame or shank 41 which is adapted to be IGC8l"(l by an aperture 42 in the crank case 21 and is held in position by a set screw 43. Frame 41 providesa bearing for an engine driven shaft 44 which carries a cam 45 for operating the push rod 31, a gear 46 driven by a gear 47 connected with crank shank 27, a cam 48 for operating the push rod 30, and a shoulder 49 which abuts one end of the frame 41. It will be noted that the greatest radii of cams4'5 and 48. and the radius of gear 46 are less than the radius of the aperture.42,so that the frame or shank 41 may be withdrawn from the engine after the set screw 43 is removed and the push rod 30 is lifted so as 'to provide clearance for the gear 46.

Endwise movement of the shaft 44 is prevented by the shoulder 49 and by a washer 50 and a nut 51 threaded on shaft 44. ,The nut is split on one side at 52 and receives a clamping screw 53, so that by tightening the screw 53 nut 51 can be secured in adjusted position.

The frame or shank 41 merges into a cupshaped timer housing 60 having an end wall 61 to which is attached a plate 62 by means of screws 63 which also'secures said plate to a terminal bracket64 insulated by

nonconducting plates

65 and 66. Plate 64 ineludes an arm 67 carrying a contact 68 which cooperates with the contact 69 carried by a breaker lever 70 wln ch is ivoted at 71. The lever 70 includes a rub ing block 7 2 cooperating with a cam 73 which is provided bfi' flattening a portion of the shaft 44 as s own at 74 in Fig.- 5. ,A leaf spring.75 having one end connected with an insulated terminal 76' and intermediate portion bent around the pivot 71 and the other end connected with the? pin 77 on the breaker 70 serves to conduct current between the contact 69 and the terminal 76 and also to maintain the contacts in engagement or the rubbing block 72 in engagement with the cam supports a non-conducting washer 88 upon which is mounted an electro-magnetic wind: ing 89 having

terminals

90 and 91 whicl1extend through the aperture 86. The winding 89 surrounds a .non-magnetizable tube 92 7 within which slides a magnetizable plunger 93 attached to a rod 94 which is connected with the throttle valve shaft 35 (see Fig. 1). The plunger 93 is maintained in position shown in Fig. 9 by means of a spring 95 located between a washer 96which rests on the tube 92, and a collar- 97 adjustably secured to the rod 94 by set screws 98. The coil 89 is enclosed ,by a case 99 having a cover 100 which is apertured to receive and support a tube 92. The case 99 is attached to the flange 87 by screws 101. a

The engine driven fuel pump is of ,the diaphragnr type described and claimed in detail in the copending application of Charles L. Lee and Charles F. Kettering, fuel supply systems, Serial .N o. 633,511, filed April 20. 1923'.

Bliefly," this pump includes frame members and 111 which are, attached by screws 112. These members are so constructed that when they are connected to the bracket 81 by the screws 113 a cover will be provided for the opening 114 in the bracket 81. Therefore, it is apparent from Fig. 3, that the

parts

60, 82, 110 and 111 cooperate to provide a houslng for the ignition timer and for the pump operating mechanism.

The pump operating mechanism includes a one tooth annular worm gear 115 which is operatively connected with a reduced por-' tion 116 of shaft44 and is held in osltion by nut 117 cooperating withia threa ed and of said shaft. The worm gear 115' drives a gear 118 which is attached to a hub 119 carrying a self lubricating sleeve 120. Hub

119 as journalled within a self lubricating sleeve 121 attached to a sleeve 122. which is supported by a plate 123.

Gear 118 carries a cam 125 which engages a roller 126 mounted on a shaft 127 carried by an arm 128 attachedto a pump rod 129 by means of a pin 130. The shaft 127 carries a roller 131 adapted to cooperate. with guides 132 provided by the frame 110 in order to prevent-rotation of the pump rod 129. The cam 125 is adapted to push the rod 129 downwardly twice during every revolution of the gear 118. The roller 126 is normally held in engagement with the cam 125 by means of a spring 133 hearing at one end against the plate 123 and pressing upwardly against a plate 134 which is attached to the .A flexible bellows 135 is pump rod 129. attached at its upper end to a plate 134 and its lower end to the plate 123.

bet-ween the plate 123 and the l ousing 111. Obviouslythe spring 133 holds he gear 118 The plate 123 is attached to the pump/housing 111 by screws 136 there being a packing memberaud the-hub 119 against the lower ends of sleeve 121 and sleeve 122. To render the pump inoperative or hand operative there is provided (see Fig. 2) an arm 140 whlch is connected with a shaft 141. journalled in pump frame 110 and connectediwith an arm 142 which presses upon a lug 143 provided on the arm 128. .Ifthe finger 142 "is ro-' tated counterclockwise the rod 129 will be pushed downwardly so that the cam 125 will not engage the roller 1'26. Downward move ment of the gear 118 is limited'b a shelf 118 for engagii-ig the'lower side 0 the gear 118. The pump ind- 129 slid'e's'up and down in the rotatablebearing' sleeve 120 and its a lower end is guided by a self lubricating bearing sleeve 14"4 supported within a recess 145 of the lower portion of the frame 110.

The space between the bellows 135 and the pump housing 111 provides a chamber for receiving fuel. Passage of fuel through this chamber is controlled by valve mechanism which will now be described. The downward movement of the bellows 135 causes fuel to be sucked through the openin 151 (see Fig. 8) through a screen 152 an passages 153 and1'54', past a valve 155 resting on a seat 156, through a recess 157 in valve guide plate 158,- and then through an:

aperture 159 connecting the recess 157 with the chamber 150. During the down stroke up stroke of the pump rod .129 the valve 155 remains on a seat 156 due to the back pres-.

of the pump rod 129 the valve 160 shown i in Fig. 7 remains 'on its seat 161. On the mg 162 in the top wall of housing 111, past a valve 160, through a recess 163 provided by the "valve cover 158, and then out of the pump through the passages 16l and 165. The valve cover 158 is secured-to-a housing 111 by screw 166 and the packing gasket -16? is provided. The cover 158 provides a cover for the screen chamber 168 and is provided with spaced lugs 169 for guiding the

valves

155 and 160-. I I The pump inlet 151 is connected by a pipe 170 withthe fuel tank 171 and the pump outlet 165 iseonnected by pipe 172 with the carburetor 33 which contains a constant level fuel reservoir connected with an overflow' 173 leading back to the fuel tank 171.

The operation of the engine causes the gear 28 to drive the shaft 44 through the gear .46. Rotation of the shaft 44 will cause the

cams

45 and 48 to operate the valve mechanism in correct timing with the engine shaft 'and the breaker lever will be operated to break the ignition primary circuit at the desired instant; The gear 115 willbe rotated to thread its way through the notches in the gear 118 to produce the rotation of the cam 12 5 and the reciprocation of the pump rod 129. The operation of the fuel pump is therefore responsive to the speed of the engine and is of suflicient capacity to supply the carburetor with the maximum requirement of fuel.

The throttle governor spring normally .holds the throttle valve in a predetermined position to limit the speed of the engine. The magnet coil- 89 is included in an electrical circuit which is res onsiveto a demand for current. There ore, the ampere turns of coil 89increases with the current demands and will open the throttle valve in order that the engine may develop the power required for driving the generator under these conditions. An electrical system in which the governor may be used is shown in my copending application, Serial No. 689,602, filed January 31, 1924.

While the fornr of embodiment of the in .vention as herein disclosed, constitutes a preferred form, it is to. be'understood that other forms might be adopted, all coming within the scope of the claims which fol a shank ortion provided with a concentric cup portion; a shaft journaled in said shank low.

What is claimed is as follows: 1. An .internal combustion engine comprising, in combination, a frame; an engine driven shaft projecting through said frame;

an ignition timer having a housing extending through the frame and providing a bearing for saidshaft,

said shaft.

2. device of the character described comprising in combination :a casing having and means covering the housing and including a pump operated by portion and extending into the cup portion; .an ignition device, in the cup portion and opcratively' connected. with the shaft; a pump; a controller; and a member adapted to be secured to the cup and including means for mounting the pump in operative relation with the shaft, said member including a bracket extension providing amounting plat-form for the controller.

3. A structure comprising a shank portion adapted to be received by an enginef-rame and a cup portion concentric with the shank,

ashaft extending through the shank into the cup portion, a pump-havinga frame detachably secured to the cup portion and providing a cover for said cup portion, and, means connecting the amp operating mechanism and the shaft, said means bein'g automatically disconnected by the removal of the pump from the cup portion.

4;. An internal combustloif engine comprising, in combination, a crank case provided with an aperture; a crank shaft journaled in the crank case; and a structure removable as a unit and received by the aperture,= said structure including a valve cam journaled within the member, ignition timer mechanism including rotatable means carried bythe shaft and a relatively stationary means carried bysaid member, pump mechanism, driving connections between the cam shaft and pump mechanism, said connection being constructed and arranged whereby said pump mechanism maybe removed while the rotatable and relatively stationary means -of said timer mechanism are main- 'tained in cooperative relation with" the cam" shaft.

6. An internal combustion engine com-' prising, in combination, a fuel "intake havmg a'throttle; a governor for said throttle; a crank case provided with anaperture; a crank shaft journaled in the crank case; and

.a structure removable as a unit and received by the aperture, said structure including a valve cam shaft driven by the crank shaft,

driving connections between the cam shaft and; said mechanisms, a support for said throttle governorinclosing a portion of said connections, said connections being conignition timer mechanism, pump mechanism,-

crank shaft, a second housing carried by the first housin q. ignition timer mechanism within one of said'housings, pump mechanism within the/other housing, and driving con net-tions between the second shaft and said timer and pump mechanisms, ISilld driving. connections being constructed and arranged whereby the mechanismin said second housing may be disengaged from said shaft while the mechanism in the first housing is maintained in operative relation with the shaft when said second housing is removed.

8. An internal combustion engine comprising. in combination. a crank case provided with an aperture: a crank shaft journaled in said crank case; and a unitary structure including a housing received'by said aperture and having an opening in one. wall thereof, a second shaft journaled in said housing and extending through said aperture and arranged to be driven by the crank shaft, a second housing carried by the firsthousing and having an opening in ne wall thereof and registering withthe opening 1n the first-houslng, an ignition timer mechanism within one of said housin a pump mechanism within the other of said housings, driving connections between said second shaft and said mechanism within-the first housing, and drivprising, in combination, a fuel intake having a throttle; a governor for said throttle; a crank case provided "with an aperture; a crank shaft jou'rnaled in the crank case; and a structure removable as a unit, a housing received by said-aperture, a valve cam shaft journaled in said housing and driven by the crank shaft, a second housing carriedby the first housing, ignition timer mechanism within one of said housings, pump mechanism "within the" other housing, a support for the throttle governor interposed between the housings, and drivingconnections between the camshaft and said mechanisms, said driving connection being inclosed by the housings and said support, and having a joint within the support whereby the mechanism in the second housing is disengaged from the cam shaft at said-joint when the second housin is removed while the mechanisin in the first housing ismain tained in operative relation with said cam shaft.

11. An internal combustion engine comprising, in combination, a frame, an engine driven shaft; and a structure removable as a unit including ignition timer mechanism having rotating and stationary portions, pump mechanism, a housing for sa d time]: mechanism carried by the frame, said'housingconnection'between said second shaft andg v ng ll opening providingaccess to said mechanism within the secondhousing, said last connection extending through the openings and detachableadjacent said opening whereby the mechanism in saidsecond housing may be disengaged from. the shaft to provide access to the mechanism in said first housing when said second housing is removed.

9. An internal [combustion engine comprising, in combination, a fuel intake having a throttle; an electrical governor for the throttle; a crank case provided with an aperture; a crank shaft journaled in said crank case; and a structure re- -movable as a unit including a housing received by said aperture, a second shaft journaled in said. housing and extending within the crank case and arranged to-be' driven by the crank shaft, a second housing, ignition timer mechanism within one of sald housings, pump mechanism withinthe other the rotating and stationary portions of the timer mechanism,a secondhousing for the other mechanism carried by the first hous-' ing and covering said opening, driving connections between the shaft and the mechanisms, said connections extending into the first housingand through said openin said driving connections belng constructe and arranged whereby the pump mechanism is disconnected. while the timer mechanism is maintained inoperative relation when the second housing is removed.

12. An internal combustion engine com prising, in combination, a fuel intake having a throttle; an electrical governor for the throttle; a frame; an engine driven shaft; and a structure removable as. a unit including ignition timer mechanism, pump mecha nism, ahousing for one of said mechanisms carried by the frame said housing havin an opening, a second housing for the ot er housing, a support for 'said governor intermechanism, a support for said- .governor interposed between said housings and having an opening extending therethrough, drivlng connections between g nisms, said connections extending through '5 the openings in the first housing and support, and inclosed by said housings and support, said (1 riving connections being con-- said shaft and mecha.--

mechanism is disconnected while the timer mechanism is malntained 1n operative relation when the second housing is removed.

In testimony whereof I hereto aflix my signature.

FRANK F. STARR.