US1695218A - Starting arrangement for internal-combustion engines - Google Patents

Description

Decn 11, 1928. 1,695,218

|=. v|E-r` STARTING ARRANGEMENT FOR INTERNAL COMBUSTION ENGINES (weary/- Patented Dec. 11, 192s UNITED STATES.

' PAUL yVIEi, OF BILLANCOURT, FRANCE., n

STARTING ARRANGEMENT :son INTERNAL-COMBUSTION ENGINES.

` Application led February 6, 1926, Serial No. 86,641, and in France September 3, 1 925.

The present invention relates to a starting arrangement for internal combustion en-v gines, and more particularly to means for supplying such engines with air carburetted with petrol (or any other' carburetting liquid or gas) which is taken from a small auxiliary internal combustion engine during the compression period, said auxiliary engine utilizing for its normaloperation the same 1U carburetted air. L

The specification and the annexed drawings show various constructions of arrangements accordingto the invention.

i In the accompanying drawings:

Fig. 1 is a diagrammatic section of the auxiliary starting engine.

Figs. 2 and 3 show two constructions of a device for re-carburetting the carburetted mixture before its admission to the engine to be started.

Figs. 4, 5 and 6 show-different positions of the cock which serves for connecting the bodies of the carburetter and the atomizer shown in Figs. 2 and 3.

Fig. 7 is a view in elevation showing the connection of the auxiliary starting moto'i` to an internal combustion engine.l

Fig 1 shows in diagrammatic section the device which comprises a small auxiliary ordinary four-cycle motor 1, having in addition tothe admission valve 2 which may be either positively operated or'automatic, and the discharge valve 3, a third controlled valve 4, the stem of which has been packed tight by means of a suitable packing device 5, for instance, a, packing gland. This "valve enables the carburetted air, used for the normal operation of the auxiliary engine 1 (whilst same is in the compression period) to pass into a portf, the capacity of which is made as small as possible and which is closed by an .autos matic valve/7 loaded by means of a spring t3 which may be regulated for instance by means of a screw ca 9. The valve 7 connects in its open position the port 6 with a pipe 10 leading to the engine to be started.

The operation of this arrangement'is as follows: v

The auxiliary engine lis designed to have a compression chamber of smaller volume than usual, which enables the carburetted explosive mixture to be compressed to the highest possible degree (6 to 10 kgs. for 'in' stance) when the piston moves. towards the end of its upward stroke, the valve 4 is lowestablished by the valve 7, enables the excess pressure to pass away, and the valve L1 closes after the explosion. At each compression in the auxiliary engine, a portion of the carburetted mixture will therefore enter the cngine to be started until the vmaximum degree of compression in the latter is reached. An electric spark, which may be'produced by a storage battery or a starting magneto, will thus suiiice for starting the 'engine to be started. In case a mis-timed ignition should take place owing to the high degree of compression7 no damage would be caused thereby, and the engine would merely start automatically.

ln Figure 7 is shown the auxiliary motor 1 connectedby .its outlet pipe 10 and the pipe 27 to the carburetter 12 and from such carburetter by the pipe 28 to the intake of the motor 29 to be( started.

Where it is not desired -t'o re-carburet the mixture for th'e engine to be started the outlet pipe 10 can be connecteddirectly to the engine.

Inthe example just described it was assumed that a four-cycle engine ,would be used, but a two-cycle engine, witlwrwithout auxiliary compression cylinders, could be used equally well. A suitable controllingvvalve may also be used instead of the screwcap 9 and spring 8.

It must, however, be observed. that the nor- 9 mal carburetted mixture supplied bythe pipe pure air in the the adrnlion pipe; it is therefore rendered lean and it is advisable to re-carburet same to the normal degree, if faulty starting is to :be started and in,

be avoided, though the engine may be started underlcircumstances withl the mixture of thel auxiliary engine, without any re-carburetting arrangement. y

For this purpose, a sim le atomizer' as' shown in Fig. 2 or a dou le atomizer as shown in Fig. 3 may be added to 'the c arburetter 11 of the auxiliary engine 1. Accordingto Fig. 2, the carburetter 11 is Y opening 19.

in communicatiomwith the atomizer 12 by means of a cock 13. The mixture to be recarburetted enters through an `opening 14 into the chamber of the atomizer 12. The pressure acting upon the free surface of the liquid forces the latter to pass into the simple sprayer 15 and then atomizes the liquid in the gaseous current passing around the sprayer, before passingk the normally saturated mixture to the engine to be started through pipe 16. The charging of the carburetter 1l of the auxiliary engine l and the atomizcr 12 of the engine to be started may be accomplished by means ot a plug 17. The cock 13 enables the tWo reservoirs 11a and 12a to be brought into communication during the charging and to be separate from one another during starting, so as to make the reservoir 11 of the atomizer 1l pressuretight. The charging might also be eil'ected by means of an additional pump or a charging reservoir.

In the re-carburetting arrangement according to Fig. 3 a carburetter 11 of the auxiliary engine is connected to a double sprayer 18,

which as inthe previous case is entered by the mixture to be re-carburetted through an A The pressure present in the sprayer forces the carburetting liquid to pass into the sprayer 20; this liquid is then atomized in the atoinizer 21 by the gaseous current lpassing around the sprayer 20. A branch passage of the compressed gaseous mixture provided with a. valve 22 loaded by a spring 23, causes said mixture to open the valve 22 in expanding, and eiects the spraying and the normal carburation ofthe re-carburetted mixture before the latter passes to the engine to be started. 'l i The reservoirs 11a of the carburetter and l18a of the sprayer communicate with each other through a cock 24, to the plu 1r of which the carburetting liquid isadmittedbby'a pipe 25 (see Fig. 5). This cocky 24 may assume three dilerent positions:

4 1. The position according to Fig. 4 which permits air inthe reservoir 18a to escape through pipe 26.

2. The position according to Fig. 6 in which' the reservoirs 11 and .18 are 1n`communication.

3. A closing osition not shown, which during the starting period causes the previously mentioned openings to be closed so as gine has been reached.

to render the reservoir 18 absolutely tight, and prevent pressure entering throu h the openings 19 from being transmitted or instance to the charging reservoir, and avoiding bursting of the latter.

Claims:

1. A starting device for internal combustion engines comprising an auxiliary internal combustion engine, said engine being provided With fuel intake and exhaust valves,

'a carburetor in communication with said intake valve, a conduit connecting said auxiliary engine with the engine to be started, a pressure operated valve in said conduit operable to open position through pressure in auxiliary engine only, and means for regulating the opening ot said pressure operated valve to permit escape of a portion of the said auxiliary engine to said passage, and a.

second carburetor interposed in said passage for further carburetting the mixture supplied to the engine to be started.

3. A starting device for internal combustion engines comprising an auxiliary internal combustion engine, said engine being provided With fuel intake and exhaust valves, a carburetor in communication with said intake valve, a conduit connecting said auxiliary engine with the engine to be started, a pair of valves in said conduit, a cam shaft, means on said cam shaft for controlling said intake and discharge valves and one of said pair of valves, and spring regulated means for controlling the other of said pair of valves to permit said other-valve to open when a predetermined pressure in said auxiliary en- In testimony whereof I hereunto aiix my signature.

PAUL VIET.

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