US2381832A

US2381832A - Internal-combustion engine

Info

Publication number: US2381832A
Application number: US486125A
Authority: US
Inventors: Mansoff Arthur Percival
Original assignee: Individual
Current assignee: Individual
Priority date: 1943-05-08
Filing date: 1943-05-08
Publication date: 1945-08-07
Anticipated expiration: 1962-08-07

Description

Aug. 7, 1945. A. P. MANSOFF 2,381,832

' INTERNAL-COMBUSTION ENGINE Filed may s, 1943 s/xive @omeg Patented Aug. 7, 1945 FFHCE mTaaNAL-cotmris'moN ancm Arthur Percival M nson, Dauphin, Manitoba,

(fans/d Application Ma s, 1943, Serial No. 486,125

Claims.

-. ing bywhich air under pressure is introduced to the cylinder and directed to obtain a thorough discharge of the waste gases.

Additionally in'the art air introduced to the I cylinders for forming the charge is normally under atmosphere pressure only. It has been proposed in various ways to increase the pressure obtainable eitherby use of high compression, as in the-poppet valve engine, or by supercharging.

' The within invention provides improvement in the charge by introducing air under pressure to the cylinder by a simplified form of superchargihg.

One of the objects of the invention is accordingly to provide improved scavenging means for the cylinder of an internal combustion engine by which air under pressure is introduced to the cylinder at the conclusion of the power stroke to effect discharge of the waste products of combustion through a simultaneously uncovered outlet port.

A further object of the invention is to provide means for s0 directing the incoming scavenging air as to ensure complete elimination-of waste gases.

A still further object of the invention is to provide improved and simplified means for preparing and introducing a charge under pressure to the cylinder in advance of the compression stroke of the engine piston.

Other features and advantages of the invention will become apparent by reference to the accompanying description taken in conjunction with the drawing wherein:

Fig. 1 is a side view in elevation of an engine cylinder and piston with associated elements of which the cylinder and certain parts are in vertical section.

I Fig. 2 is a detail view of apart of the engine shown partly broken away and partly in vertical section and providing details of the injector mixer valve, heated vaporizer and check valve.

Having reference to the drawing l indicates an engine cylinder which in the present showing is somewhat elongated to accommodate a piston Mounted for reciprocation within the cylinder l is a piston assembly that includes a main piston 4 formed with a solid head on each end. The piston t is drilled and tapped for mounting a piston rod 5 that is threaded through top and bottom of the piston and secured by a screw 6 through the head of the piston countersunk therein. The piston rod 5 includes an integral enlarged section I forming a smaller intermediate piston reciprocating within a complementary bore in a solid center block 8 of the cylinder l. The piston section I is provided with sealing rings as in ordinary piston construction.

' In the cylinder l, below the block 8, is formed a further compression chamber in which is mounted a secondary piston 9 secured to the lower end of piston rod 5, the piston rod having a tapered portion It! for seating against a'complemen tary opening in the piston 9, and terminating in a threaded end II for receipt of a locking nut l2.

It will be seen that the cylinder I with its integral block 8 is designed as a unit providing two compression chambers, one above the block 8 and the other below said block; the compression chamber above the block is further divided into two compression areas by reason of the piston l being closed at the ends, there being a combustion area between the piston and cylinder head in which the charge is compressed and fired, and a compression area between-the piston and block 8 in which air for the charge is compressed preliminary to forming the charge.

The secondary piston 9 conforms generally to the ordinary piston in common use and is provided with the usual connecting rod I3 and associated pin and crank connections as indicated. There is included a shaft M for the electric distributor and pump, the shaft l4 being mounted in a bracket I5 power stroke. For this I provide a pipe IS in which air 'from the lower section of the cylinder compressed by the upward stroke of secondary piston 9 is held by a check valve H. The upper end of the pipe l6 discharges into the upper section of the cylinder, designated by numeral I8, and is normally closed by the main piston 4 to be uncovered at the approximate termination of the down stroke of the piston and to allow the pock- 'eted air to enter to enter the cylinder section l8 and displace the waste gases which are discharged through an exhaust pipe I9.

In order to direct the incoming scavenging air from pipe IS a lip 20 is provided on the piston 4 in opposing relation to the upper port from pipe l6. 'I'hislip is adapted to direct the incoming air from pipe I6 upwards to clear the upper portion of the cylinder of waste gases.

During the downward movement of. piston 4 air iscompressed in the lower portion of the upper cylinder, indicated by numeral 2|, and in the bore of block 8. The cylinder bore in block 8 has an outlet conduit 22 discharging through a pipe 23 into the upper cylinder section l8. Air compressed by cylinder 4 in chamber 2| is stored in the bore of block 9, this bore being evacuated by descent of piston When the upper .end of piston I uncovers the outlet through pipe 22 the air compressed and stored in the bore of block 8 is released for discharge.

In the pipe 23 is interposed an injector mixer valve and chamber 24 with fuel inlet 25 where the charge is formed to be passed through an ex haust heated'vaporizer 26 to discharge into the cylinder section l8 where it impinges on lip 20 for distribution. For the injector mixer valve a, chamber 29 provides a float chamber 30 into which fuel inlet 25 discharges and in which a float 3| is hinged in relation to the inlet of a valve chamber 32, fuel from which is sprayed into the main body of chamber 29 under control of a needle valve 33. Discharge from pipe 23 passes outlet 22.

compressed into pipe |6 through check valve il until required on the next down stroke for scavenging the chamber l8.

The return movement of piston I closes the The vacuum created in chamber 2| by the upward movement of piston 4 is relieved when the inlet 21 is uncovered.

into the main body of the chamber 29 to be mixed with the atomized fuel from the chamber 32 and discharged therefrom through the vaporizer 26 into cylinder section l8.

There is further provided in the cylinde I an air inlet port 21 for the section 2| and an inlet port 28 for the lower cylinder section. In the operation of the engine, in the down or power stroke of the piston assembly the air inlet port 21 is first covered by piston 4 and air in the cylinder section 2| is compressed, the bore of block 8 providing a storage chamber for the compressed air.

Continued downward movement of the piston assembly uncovers exhaust port |9 to allow the waste gases in cylinder section l8 to escape. Immediately following this the piston 4 uncovers the inlet port from pipe Hi to allow air stored therein under pressure from the previous upward stroke to escape into the cylinder section l8 and drive I the waste gases out through port l9, this action being assisted by the deflection of the air from pipe l6 by lip 20. Compression of air within pipe IS on the up stroke of the assembly is hereinafter described.

Following the scavenging action the outlet port 22 is uncovered by piston section 1 which is moving downward in conformity with movement of piston 4. This allows air compressed in the lower cylinder section and stored in the bore of block 8 to enter pipe 23 and after passage through mixer valve chamber 24 enters the upper cylinder section l8. This air is under pressure and while some pressure may be relieved before closure of port I9 a considerable pressure will be maintained.

During the downward stroke of the piston assembly a vacuum is formed in the lower cylinder section until released by inlet port 28. On the upward stroke of the piston assembly the air is .The piston movement herein described permits of a two cycle engine performing the functions normally carried out by a four cycle movement since the scavenging is accomplished without any extra piston movement. In addition the charge in the cylinder is under pressure in advance of the pressure stroke of the piston so that greatly increased compression is obtainable.

While I have herein shown in the drawing bare essentials for illustrating and describing the improvements contemplated it is to be understood that the necessary associated parts common in the art would be added in the construction of a working engine including oil pump, generator and other elements. I

The within showing is to be taken as a preferred embodiment of my invention but itis obvious that changes in construction of par-ts and elements would be permissible within the scope of the invention as defined in the appended claims.

What I claim and wish to secure by Letters Patent is:

1. In an internal combustion engine a cylinder providing inlet and exhaust ports, a piston mounted forreciprocation in the cylinder, said piston being closed at the ends, a connecting rod for the piston, a, block in the cylinder, said block providing a bore for travel of the connecting rod, and said block being spaced from the cylinder head to provide compression areas above and below the piston, means providing communication from the lower to the upper of said comprescommunicating means,

2. In an internal combustion engine a cylinder providing inlet and exhaust ports, a piston for reciprocation in the cylinder, said piston being closed at the ends, a connecting rod for the piston and an integral piston section on the connecting rod, a block in the cylinder spaced to provide for compression areas above and below the piston, said block providing a bore for reciprocation of the piston section on the connecting rod, a pipe providing communication between the cylinder block bore and the upper compression area of the cylinder, and charge forming means for the P 1 8.

3. In an internal combustion-engine, a cylinder providing inlet and exhaust ports, a piston for reciprocation in the cylinder, said piston being closed at the ends, a connecting rod for the piston and an integral piston section on the connecting rod, a block in the cylinder providing a bore for reciprocation of the connecting rod piston section, said block being spaced from the ,cylinder head to provide for compression areas above and below the piston, a pipe providing communication between the cylinder block bore and the upper compression area, charge forming means in the pipe a secondary piston on the connecting rod below the block and forming a, compression chamber in conjunction therewith, a scavenging pipe between said last mentioned compression chamber and the upper compression area, and valve means for the scavenging pipe.

4. In an internal combustion engine a cylinder, 9, block dividing the cylinder to form compres- Mon chambers, one above and one below the block,

a piston assembly for reciprocation in the cylinder, said assembly providing a main piston for operation in the compression chamber above the block, and a secondary piston for operation in the compression chamber below the block, and a rod connecting the pistons, the block being bored for travel of said rod, a scavenging pipe providing communication between the cylinder chambers above the pistons, the outlet for said pipe being located to be uncovered at the termination otthe power stroke of the main piston, and a check valve in the scavengin pipe by which air compressed by the secondary piston may be stored in the scavenging pipe for discharge into the cylinder chambers for the main piston.

- 5. In an intemai combustion engine Providing a cylinder with piston for reciprocation therein, and a connecting rod for thepiston, a block in the cylinder located in relation to the piston and cylinder head to provide for compression areas above and below the piston, said block being bored to form a chamber for storage oi air compressed in the lower compression area, a piston on the connecting rod forming a movable closure in the block bore, and a communicating pipe between the block bore and upper compression area.

ARTHUR P. MANSON.