US1136512A

US1136512A - Starting device for internal-combustion engines.

Info

Publication number: US1136512A
Application number: US?3636714A
Authority: US
Inventors: Paul Daimler; Max Friz
Original assignee: Daimler Motoren Gesellschaft
Current assignee: Daimler Motoren Gesellschaft
Publication date: 1915-04-20
Anticipated expiration: 1932-04-20

Description

P. DAIMLER 8; M. FRIZ.

STARTING DEVICE FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED MAY 4 19M.

1 13 6512, 1 Patented Apr 20, 1915.

L SHEETS-SHEET l.

I Q I I Win/655m;

hwizz a?" M 9 do @gwwmz gg WMWQAWQZQM v a JWJW P. DAIMLER & M. FRIZ. STARTING DEVICE FOR INTERNAL COMBUSTION ENGINES. APPLICATION FILED MAY 4, 914- I I 1 ,1,:3@ 51g Patented Apr. 20, 1Qi5.

f1 SHEETS-SHEET 2.

iwms 3 4.-

P.. DAIMLER & M. .F'RIZ.

STARTING DEVICE FOR INTERNAL COMBUSTION ENGINES. APPLICATION FILED MAY 4, I9I4.'

Patented Apr. 20, 1915.

4 SHEETS-SHEET 3.

/1 6. @w O M. yaw/ 46 w P. DAIMLER (MM. FRIZ.

STARTING DEVICE FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED MAY 4, 1914.

1913635120 I v Patented Apr. 20,

4 SHEETSSHEET L.

JWFI W the crank shaft in motion.

the next cylinder which was AND TED @TATEEB RQUL DAHQLER, 0F CANNS'IATT,

are rare, or uursurirerssurrs, aitiuhatt;

ASSIGNOLRS TO DAIIEZLEEMOTOEEILGESELLSCHAFT, lJ'Zil'TERTi'iRKHEH/I,

MANY.

STAR ENG DEVEECE F018 ENTERNAL-GOMBUSTEON IINGIIQ'ES.

specification. of Letters Patent.

lQatent-ed T6},

Application filed May l, 1814. serial Ito. 8353K.

T all {whom it may concern:

Be it known that we, PAUL DAIMLER, a subject of the King of Worttemberg, residing at Cannstatt, in the German Empire, and Max Fuzz, a subject of the King of Wurttemberg, residing at Untertiirkheim, near Stuttgart, in the German Empire have invented new and useful Improvements in Starting Devices for Internal-Comhustion Engines, of which the following is a specification.

This invention relates to an improved de-,

vice for starting internal combustion engine's and adapted to enable the engine to be started in any position of the crank shaft withoutit being necessary to first of all bring the crank shaft into a certain position. Thegas residues of all the cylinders notopen to the exhaust are drawn off by the starting device in the known manner and fresh mixture supplied to the cylinders. One of the cylinders will always be in the expansion period of its cycle so that on actuatihgthe starting magneto the first i nition 'will take place in this cylinder and t us set In immediate take place previously stopped in the compression period of its cycle and the engine will thus be started.

According to the present invention each cylinder, in addition to having the usual admission and exhaust valves, is also succession a further ignition will the gas residues in the cylinder can be withstarting am is provided on the the usual admission and exhaust cams. The starting cams are adapted to be put into and out of operation as required and are so disposed relativey to the admission and exhaust cams that they open the admission and eduction valves of those cylinders which are not open to exhaust in order to enable the gas residues in these cylinders to be withdrawn and enable a fresh gas mixture to enter, while the starting cams do not actuate the valves of those cylinders which are open to the exhaust. The gas residues in the cylinders are withdrawn through the eduction valves in the In order that the admission. valve which starting,

provided with an eduction valve through which usual manner by 'means of a manually operated pump.

engine, may also he opened by the admission cam when the engine is running normally without at the same time opening the eduction valve, a clutch device is interposed between the lever mechanism of theadniission valve and the lever mechanism of the eduction valveiadapted to operate in one direction only.

improved starting device. Fig". 2 is an en larged plan view of the starting mechanism. Figs. 2 to 2 are crcss sectional views on the line A B of Fig. 2 showing the parts in the various positions they assume. Figs. 3 to 8 are diagrammatic views illustrating the functions of a six-cylinder motor when the small superposed broken-line figures showing the position of the cams corresponding to the positions of the crank and connecting rod shown in the'main figures by broken line. Fig. 3 shows the, position of the pa'rtsduring the expansion period. Fig. 4 shows the position near the end of the exhaust period; Fig. 5 at the end of the suction period; the expansion stroke and commencement of exhaust; Fig. 7 during the compression pe riod and Fig. 8 at the commencement of the suction stroke. Each cylinder a in addition to having usual admission'valve c and 'exhaustvalve (not shown) is also provided with an eduction valve cl through which the gas residues in the cylinder can bewithdrawn. mission valve 0 and exhaust valveare'op erated in the usual manner by means of ad m'msion cams 1 and exhaust E'niounted on the cam shaft 5 which also carries a starting cam 3 for operating the eduction valve 03. The cam 3 coacts "with enrol-Eercarried by a link f mounted on. a crank-lever 9, 12,, whose arm 7: is connected to e lever Fig. 6 at the end of i A: operating the eduction valvedi- The hub V g of the crank lever 9 Fe. is mounted torotat-e on-a' pin 6 on "which the huh m" double-armed lever m is rotatahly'niounted, theleyer m being operated by tl'ie ad mission cam 1 and connected to the a, The 'hubs-gand at admission valve Fig. 2 but are capable of a certain amount of play betweeneach other so that when the lever m is actuated by the admission cam it can operate the admission valve 0 without moving the lever g,

without opening the eduction valve (1 whereas the eduction valve (1 can be opened by the lever g, h when operated by the starting cam 3 if the admission valve 0 is already open, while finally the'two valves 0 and can be opened simultaneously by the starting cam 3.

he various positions of the interlocking hubs g and m are shown clearly in Figs. 2 to 2. Fig. 2 shows the position assumed when the admission valve (5 and eduction valve d are closed. Fig. 2 shows the position when the admission valve 0 is opened by the admission cam 1 while the eduction valve d remains closed, this being the case when the engine is running normally. It will be seen from Fig. 2 that the hub m of the lever m has been turned through an angle a: which corresponds to the stroke of the valve 0. Fig. 2 shows the position which the hubs assume when the admission valve cars opened by the admission cam 1 and when the eduction valve d is opened by the starting cam 3. The hubs g and m assume the ositions illustrated in Fig. 2 when the a mission valve c-and eduction valve d are simultaneously opened by the starting cam 3.

Mounted .bove the link 7 is a shaft 12 carrying a switch lever 0 and having a depending arm 0 which is connected to the link 7 by a bolt 0 By turning the lever 0 into the position indicated by broken lines, the roller of the lever f is swung out clear of the starting cam 3 as indicated by the dotted circle. In the position illustrated in full lines in Fig. 1 the starting device is in operative position, the valves 0 use 03 being open so that the gas residues in the cylinder may be drawn oii' through the valve (1 by a manually operated pump connected to the connection 7), while a fresh gas mixture is drawn in from the carburetor through the valve 0.

As will be readily seen from Figs. 38 of the drawings the starting cam 3 is'so disposed relatively to the admission cam 1 and exhaust cam 2 that it only actugtqs the valves 0 (l of those cylinders which are not open to the exhaust. Thus Figs. i and 6 show cylinders during their exhaust period when the valves 0 (5 remain closed whereas 3, 5, 7 and 8 show cylinders during the expansion, compression or admission when the valves 0 fresh mixture will be supplied to the cylinh and consequently v d are opened by the starting cam 3 so that in the positionmacaw ders from the carbureter through the bpen admission valves 0.

"Although the has been illustrated and describedas applied to aniengine whose cam shaft is axially. fixed it will be readily understood that the device I may be also applied to engines of the type in which the cam shaft is axially movable in which case the lever mechanism for operating the valves may be dispensed with and-the cam shaft provided with a ablesthe roller coacting with the admission cam to make contact withthe starting cam. A particular advantage of the improved starting device is that the engine can started in any-position without manipulation by the driver thus insuring greater v reliability.

1.111 cilmbination with a multi-cylinder internal combustion engine having admis sion and exhaust valves for each cylinder, a starting device comprising an eduction valve for each cylinder through which the gas residues may be withdrawn, and mechanism for simultaneously opening the admission and eduction valves of those cylinders whose'exhaust valves are closed at themoment of starting the engine and for closing the eduction valve of the cylinder whose exhaust valve is open at that .moment.

2. In combination with an internal combustion engine having admimion and exhaust valves operated from admission and exhaust cams on a cam shaft, a starting device comprising an eductio'fi valve, and starting cam on said cam shaft so disposedrelatively to said cams that the admission and eduction valves are opened when the exhaust valve is closed to enable the' gas residues in the cylinders to be withdrawn and tune to enter the cylinder.

3. In combination with an internal combustion engine having admission and exhaust valves operated from admission. and exhaust cams on a cam shaft, a starting device comprising. an eduction valve, a starting cam on said cam shaft, valve mechanism operatcd by said starting 0am to open said admission and eduction valves, said cam be- .ing so disposed relatively to said admission from the starting earn 3 improved starting device transition device which enadmission and exhaust enable fresh gas mix- 7 the cylinders to be withdrawn and enable fresh gas mixture to enter the cylinder and means for putting said valve mechanism into or out of cooperation with said starting cam.

l. In combination with an internalcombustion engine having admission and exhaust valves, a cam shaft and admission and I exhaust valves on saidcam shaft adapted'to operate said admission and exhaust valves,

a starting device comprising a starting cam on said cam shaft, a pivoted lever adapted to be operated by said starting cam, an ednccylinder operated by said lever, an admission valve lever pivoted eoaxially with the first mentioned lever and adapted to be operated by said admission cam and to operate said admission valve, said. starting cam eing so disposed rela- 0 tively to said admission and exhaust cams and said co-axially pivoted levers being so interconnected that the admission and eduction val be opened bi saidstarting cam when the exhaust valve closed While mentioned cooperation with said from said exhaust cam, coaXially pivoted levers adapted to be operated by said'starting an admission cams respectively, ednction valve in said cylinder, mechanism for connecting said admission valve with the lever operated by the admission cam, mechanism for connecting said eduction valve with the other i said levers 11g of slight play so that the lever connected Withthe admission valve may be operated Without operating the other lever while both levers may b said starting cam, and a device tor the lever connected with the eduetion valve into or out of cooperation with said starting cam.

In witness whereof we have hereunto set our hands in the presence of tWO witnesses.

I PAUL DAMILER.

IAX FRIZ. Witnesses ROBERT UHLAND, ERNEST ENTENMANN.

lever, interlocking hubs on