US1893127A - Internal combustion engine - Google Patents

Description

Jan. 3 1933. A. BUCHI 1,893,127

' I INTERNAL COMBUSTION ENGINE Filed Nov. 17, 1927 REDUCING VALVE INVGN 722R Patented Jan. 3, 1933 UETED STATES PATENT OFFICE ALFRED BUCHI, OI WINTERTHUR, SWITZERLAND INTERNAL COMBUSTION ENGINE Application filed November 17,1927, Serial No. 234,015, and in Switzerland November 30, 1926.

This invention relates to an arrangement in internal combustion engines, with which,

starting is facilitated by the requisite ignition temperature being more readily reached.

The invention consists in providing means, whereby the combustion air is heated before entering the combustion cylinder by being driven through a blower. This heating may be effected while the engine is being started or preferably before the internal combustion engine is put into operation. The heating action in the blower can be increased by the air which is conveyed by the blower being circulated several times through a by-passlocated between the delivery space and the' suction space of the blower by the pump. The

motor for driving the blower can be operated by the means for adjusting the control of the internal combustion engine to the stop-ping, starting and working positions; Similarly the opening and closing of the by-pass between the delivery and suction space of the blower may be eltected by the same means.

When exhaust gas turbines are used for driving charging blowers, for the starting-operation said blowers may be driven by exhaust gas turbines, which are operated with another driving'medium, for instance with starting air from the starting air bottle.

In the accompanying drawing a constructional example of the invention is shown diagrammatically.

In the drawing: 1

Figure 1 shows a diagrammatic elevation of an engine embodying the invention with dotted positions 0, I, II and III correspond-.

ing respectively to the stop position, an in termediate position, the starting position and the running position of the control lever of 40 the engine. v

Figure 2 shows a vertical section of the cylinder at the part where the air pipes enter.

-1 is the cylinder of an internal combustion engine to which the combustion air is conveyed through the pipe-2. The exhaust gases leave the engine through the pipe 3. In the -example shownin the drawing the combustion air is delivered by a blower 4 driven by a waste gas turbine 5. The arrangement ac- 0 cording to the present invention consists in a device 6 by means of which air under pressure stored in the vessel 7 can be admitted to the turbine 5, by which the latter is putin operation and the charging blower 4: is caused to rotate. The arrangement may be such that a valve 20 in the device 6 is operated against a return spring 18 by the device 8 for adjusting the control of the internal combustion engine to the stopping, starting and working positions. In the arrangement shown this is done by means of the rods 9 and 10, collar 21 and bell crank lever 19. The

positionO of the lever 8 corresponds to the stop position, the position II to the starting position, and the position III to the working position. The arrangement is such that the admission of driving fluid to the turbine 5 already commences in a position of the lever 8 lying between the stopping and starting positions. At this moment (position I) the internal combustion engine will still be stationary and the air leaving the blower 4 will not have commenced its regular flow through the internal combustion engine. It can at the most pass through those cylinders, the inlet and outlet members of which are open at the same time. The amount of air conveyed will thus at the most be very small and consequently the rotation of the rotor wheels in the same air will cause a considerable heating of the latter. On the lever 8 being turned from the position I into the position II, the starting air valves in the casing 11 will be operated, which valves may also according to the present invention, a stop valve 15 is provided in it. This stop valve is operated by the device 8 for adjusting the control of the internal combustion engine'to the stopping, starting and working positions.

The valve 15 is opened by the rods 9 and 10 and the collar 21. When the lever 8 is turned into the sto ping or working positions, the valve is c osed by the spring 16, and when the lever 8 is turned into the position I, the collar 21 on the rod 10 strikes against the lever of the valve 15, opening the latter, so that the air conveyed by the blower 4 can flow back into the suction space 14 and can be circulated within the pump.

The positionI corresponds actually to the stopping position of the internal combustion engine, with the difference that in that case the blower 4 will be kept in operation for instance by means of compressed air. No

driving medium will be supplied to the internal combustion engine besides the air preheated in the blower. A

The lever 8,.which is the operative handle for controlling the internal combustion engine, is mounted on a. shaft 24, and on this shaft are eccentrically pivoted levers similar to 25 for operating inlet and outlet valves,

and the like, and starting air valves. The lever 25 operates the starting air. valves and has a roller 28 for coacting with the cam 27 which rotates on the shaft 26'. As a result of the eccentric mounting of the lever 25, only when its centre of oscillation is displaced downward by the lever 8 in position 11 of the latter does the cam27 force it to operat the starting air valves.

What I claim is: 1. In combination with an internal comblis- .tion engine, a turbo-blower for suppiying combustion air to said engine, piping be tween said blower and said engine, piping between delivery and suction side of said blow-,

\ blower prior-to the starting of said engine for the purpose of heating the air, said means for driving said turbo-blower including a source of compressed air and means for conmeeting said source of compressed air to the turbine of said turbo-blower.

1.3. In combination with an internal con bustion engine; a turbo-blower for supplying combustion air to said engine, piping between said blower and said engine, piping between 3 delivery and suction side of sai'd blower and a valvemember therein, means independent L 9 of said engine for driving said turbo-blower source of compressed air to said turbo-blower,

prior to the startingof said engine'iorthe purposeof heatin' the air,-said means for driving said turbolower inc uding a source of compressed air, means for connecting said a valve between said source of compressed air and said turbo-blower and means for opening and closing said valve.

.4. 'In combination with an internal com bustion engine, control means for the valves thereof, a. turbo-blower for supplying combustion air to said engine, p p ng between said blower and said engine, piping between delivery and suction side of said blower and a valve therein, means connected to said control means for said engine for opening and closin said valve, and means independent of said engine for driving said turbo-blower prior to the starting of said engine for the purposeof heating the air.

5. In combination with an internal combustion engine, a turbo-blower for supply ing co bustion air to said engine, piping between said blower and said engine, piping between delivery'and suction side of said blower and a valve member therein, means independent of said engine for driving said turbo-blowerprior to the starting of'said engine for the purpose of heating the air, said means for driving said turbo-blower including a source of compressed air, a turbine connected to the turbo-blower, means for connecting said source of compressed air to the said turbine of said turbo-blower, a valve between said source of compressed air and said turbine, means for opening and closing said valve, and piping means between the internal combustion engine and said turbine.

6. In combination with an internal combustion engine, control means for the valves thereof, a turbo-blower for supplying combustion air tosaid' engine, piping between said blower and said engine, piping between delivery and suction side of said blower and a valve member therein, means independent of said engine for driving said turbo-blower prior to the starting of said engine for the purpose'of heating the air, said means for driving said turbo-blower including a source of compressed air, means for connecting said source of compressed air to said turbo-blower, a valve between said source of compressed air and said turbo-blower and means for opening and closing saidvalve, said means being connected. to said control means for said internal combustion engine.

In testimony whereof "I have signed my name to this specification. I

- 1 ALFRED BUGHI,

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