US1151434A - Two-stroke-cycle internal-combustion engine. - Google Patents

Description

W. M. APPLETON.

TWO-STROKE CYCLE INTERNAL COMBUSTION ENGINE.

APPLICATION FILED IAN-1311914.

1,151,434. Patented Aug. 24,1915.

2 SHEETS-SHEET l.

INVENTOR WITNESSES 5.2% W WMAppleT/m V ag W Attorney.

W. M. APPLETON.

TWO-STROKE CYCLE INTERNAL COMBUSTION ENGINE.

APPLICATION FILED JAN. 13. 1914.

1 1 5 1 A34. Patented Aug. 24, 1915.

2 SHEETSSHEET 2.

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WITNESSES INVENTOR 61W WMAppI/etm Ql gg M 7 M v Attorney.

PH (IO-,WASHINOTON n c WILLIAM MOR'IEN,APPLETON, 0F WESTON-SUPER-MARE, ENGLAND.

,, TWO-STROKE-CYGLE INTERNAL-COMBUSTION ENGINE.

Specificationof Letters Patent.

Application filed January 13, 1914. Serial No. 811,845.

To all whom it may concern Be it known that I, WILLIAM Mon'rnN Ar- PLETON, a subject of the King of Great Britain and Ireland, residing at Tyn-y-Coed, Hill Road, Weston-super-Mare, in the county of Somerset, England, have invented certain new and useful Improvements in Two-Stroke-Cycle Internal-Combustion Engines, of which the following is a specification.

This invention relates toimprovements in or modifications of the two-stroke cycle internal combustion engine patented on U. S. Patent No. 100%70 dated 3rd October 1912, and it has for its objects facilitating the scavenging of the cylinder after the firing stroke, and removing certain objectionable features involved in the constructions cov ered by said patent, the most important of which are the difi'icultyof producing sound castings for the piston constructed as de scribed in the specifications of Letters Patent of the U. S. A. No. 1051537 dated 28th January 1913', and the throttling of the charge due to the tortuous nature of the byports and the distributing passages. I attain the first of these objects by using in conjunction with the piston a cylindrical extension adapted to operate as a sleeve valve to control the opening and closing both of the inlet and exhaust ports. This construction enables the exhaust port to be located at the upper end of the working cylinder and thereby enables a clear sweep through to be attained for scavenging purposes. The cylindrical extension is open at its upper end so that the firing takes place within same, and its upper end is guided within a depending head within the cylinder as is usual in sleeve valve engines.

I attain the second object of this invention by locating the inlet port on the opposite side of the cylinder to the by-port and putting said ports into communication by means of an annular recess in the piston, and by forming two of the three distributing passages in a suitable enlargement of the casting of the cylinder and the third passage in a cover adapted to be fixed over said enlargement whereby the crossing-over of the passages in a single casing is avoided.

In the accompanying drawing which illustrates this invention, Figure 1 is a view in sectional elevation through one of the cylinders, Fig. 2 is a view in side elevation showing the exhaust ports, the by-ports, and the distribution ports on one side of the cylinders, and Fig. 3 is a broken view in side elevation showing the inlet'ports on the other side of the cylinders.

Throughout the views similar parts are marked with like letters of reference.

'According to the present invention, each of the power pistons a has a cylindrical extension 8 adapted to operate as a valve for the exhaust ports 7 of which there may be any suitable number. These ports are located at or near the upper end of the power cylinder a, and said upper end is fitted with a depending head it which with the inner wall of the cylinder forms an annular recess k in which the sleeve 8 works. upper end of the sleeve are ports 8 and in the lower end of the sleeve is a port 8 the former of which coincide with the exhaust ports f and the latter of which coincides with the by-port y' when the piston a is at the bottom of its stroke. I

The inlet port 6 which is located on the opposite side of the cylinder to the by-port j is placed in communication with said byport during a predetermined part of the cycle of the engine by means of an annular recess a in the power piston a Two of the distributing passages 1' and r connecting two of the by-ports j with two of the distribution ports Z are formed in'an enlargement t of the cylinder a, and the third distributing passage r for connecting the other by-port j with the other distribution port Z is formed in a cover r adapted to be fixed over the enlargement t.

The other parts of the engine to which no specific reference has been made present no novel features over the construction described and illustrated in the specification of U. S. A. Letters Patent No. 1051537 dated 28th January 1913.

What I claim as my invention and desire to secure by Letters Patent is Patented Au 24:, 1915.

In the anion 1. In an internal combustion engine of g the two-cycle type, the combination of three pairs of cylinders, each pair being arranged tandem fashion and one of each pair being a power cylinder and the other a displacer cylinder, compound pistons working in said cylinders, an inlet port in each power cylinder, a by-port in each power cylinder located on the opposite side of the cylinder to the inlet port, an annular recess in each power piston adapted to put the inlet and by-ports into communication during a predetermined part of the strokeof said piston,

exhaust ports located at or near the upper ends of the power cylinders, sleeve valves carried by the power pistons, said sleeve valves controlling the opening and closing of said by-ports and exhaust ports, a distribution port in each displacer cylinder, and three distribution passages each connecting the by-port of the power cylinder of one pair and the distribution port of the displacer cylinder of one of the other pairs.

'2. In an internal combustion engine of the two-cycle type, the combination of three pairs of cylinders, each pair being arranged tandem fashion and one of each pair being,

series of ports one adapted to control the opening and closing of the exhaust ports and the otherto control the opening and closing of the by-ports, a distribution portin each displacer cylinder, and three distribution assa es each connectin the b ort of b Y b 7 the power cylinder of one'pair and'the distribution port of the displacer cylinder of one of the other pairs.

3. In an internal combustion engine of the two-cycle type, the combination of three pairs of cylinders, each pair being arranged tandem fashion and one of each pair being a power cylinder and the other a displacer cylinder, compound pistons working in said cylinders, an inlet port in each powercylinder, a by-port in each power cylinder located on the opposite side of the cylinder to the inlet port, an annular recess in each power piston adapted to put the inlet and by-ports into communication duringa predetermined part of the stroke of said piston, exhaust ports located at or near the upper ends of the power cylinders, sleeve valvescarried by the power pistons, said valves having two series of ports one adapted to control the opening and the closing of the exhaust ports and other to control the opening and closing of the by -po-rts, an enlargement on said cylinders, two distributing passages formed in said enlargement on the cylinders, a thirdpassage ina cover'adapted to fit over and inclose the distributing pas.- sages in said enlargement, a distribution port in each dis-placer cylinder, each of said passages connecting the by-port of the power cylinder of one pair with the distribution port of the displacer cylinder of one of the other pairs. I

In testimony whereof I have signed my name in the presence of two witnesses.

' WILLIAM MORTEN APPLETON.

Witnesses:

E. TYLER,

E. J. FUssELL.

Copies or this patent may be obtained for five cents each, by. addressing the Commissioner of Patents,

7 Washington, D. 0.

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