US1389156A

US1389156A - Two-cycle engine

Info

Publication number: US1389156A
Application number: US423064A
Authority: US
Inventors: Courtland N Packer
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-11-10
Filing date: 1920-11-10
Publication date: 1921-08-30
Anticipated expiration: 1938-08-30

Description

0. N; PACKER. TWO CYCLE ENGINE.

APPLICATION FILED NOV. ID, 1920.

Patented Aug. 30, 1921.

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-'I'WO-CYCLE ENGINE.

Specification of Letters Patent. Patented Aug. 30,. 1921.

Application filed November 10, 1920. Serial No. 423,064.

To all whom it may concern Be it known that I, COURTLAND N. PACKER, a citizen of the United States, residing at the city of Battle Creek, county of Calhoun, State of Michigan, have invented certain new and useful Improvements in Two-Cycle Engines, of which the following is a specification.

Thisinvention relates to improvements in two cycle engines.

The main object of this invention is to provide an improved two cycle engine in Which the piston is so formed and the inlet and exhaust passages are so arranged that the piston does not expand to such a degree, even when the engine is operated for a long period of time, as to cause undue friction with the cylinder walls. i

A further object is to provide in a two cycle engine an improved arrangement of inlet and exhaust in which the burned gasses are effectively discharged from the cylinder.

Further objects, and objects relating to structural details, will definitely appear from the detailed description to follow.

I accomplish the objects of my invention by the devices and means described in the following specification. The invention is clearly defined and pointed out in the claims.

A structure which is the preferred embodiment of my invention is clearly illustrated in the accompanying drawing forming a part of this specificatiomin which:

Figure I is a side elevation of a two cycle engine embodying the features of my invention looking from the left of Fig. II, crank case and parts contained thereinor mounted thereon being broken away.

Fig. II is a detail view mainly in vertical section on a line corresponding to line 2-2 of Fig. I.

Fig. III is a horizontal section on a line corresponding to line 3-3 of Figs. I and II.

In the drawing similar reference characters refer to similar parts throughout the several views, and the sectional views are taken looking in the direction of the little arrows at the ends of the section lines.

Referring to the drawing, the cylinder 1 is in the structure illustrated provided with awater jacket. Thepiston 2 is provided with a centrally disposed inverted conical recess 3 and an exhaust passage 4 leading from the inner end of this recess. The cylinder is provided with an exhaust port 5 with which the passage 4 registers when the piston is at the end of its instroke. The cylinder is provided with an inlet port 6 positioned beyond the outstroke of the piston, the outer position of the piston being indicated by the dotted line 7 in Fig. II.

At the inner end of thepiston is a, compression chamber 8. This compression chamber opens into a passage'Q in the wallet the cylinder, the passage having an inlet port 10 connected to a carbureter 11 shown conventionally, and a discharge port 12 connected to the inlet port 6 of the cylinder by the pipe 13. This pipe 13 has a pair of check valves 14.

The cylinder is provided with a set of piston rings 15 at its head end, these piston. rings being positioned above the passage 4 so that the rings do not cross the exhaust port 5 during the stroke of the piston.

The piston is provided with aset of rings 16 at its inner end, and the stroke of the piston is such that these rings do not cross the port 5. This obviates wear on the rings and the cylinder around the port. as when the rings cross the port during the stroke of the piston there is a tendency for the rings to spring into the port.

The conical recess in the head of the piston has a wall of substantially the thickness of the side walls of the piston, and by providing this recess I not'only am enabled to locate the inlet and discharge port as I have time, to such an extent as to cause undue friction of the cylinder walls.

My improved engine is very simple and economical in structure and highly efficient.

Having thus described my invention, what I claim as new and desire to secure by Let ters Patent, is: 7

1. In a two cycle engine. the combination of a cylinder and a piston having a centrally disposed inverted conical recess in its head and an exhaust passage leading from the inner end of said recess, said cylinder being provided with an exhaust port with which said piston passage registers when the piston' is at the end of its in-stroke, and with an inlet port opening into the cylinder at a point beyond the out stroke of the'piston, there being a compression chamber at the inner end of the piston provided with a delivery connection to said inlet port and piston rings at the ends of said piston, the rings at the head end of the piston being at the outer side of the exhaust passage of said piston.

2. In a two cycle engine, the combination of a cylinder and a piston having a centrally disposed inverted conical recess in its head and an exhaust passage leading from the inner end of said recess, said cylinder being provided with an exhaust port with which said piston passage registers when the piston is at the end of its in-stroke, and with an inlet port opening into the cylinder at apoint beyond the out stroke of the piston, there being a compression chamber at the inner end of the piston provided with a delivery connection to said inlet port, said be ing provided with piston rings at the outer side of the exhaust passage of said piston.

3. Ina two cycle engine, the combination of a cylinder and a piston having a centrally disposed inverted'conical recess in its head and an exhaust passage leading from the inner end of said recess. said cylinder being provided with an exhaust port With which said piston passa'ge'registers when the pis ton is at the end of its in-stroke, and with an inlet port opening intothe cylinder at a point beyond the outstroke of the piston.

In witness whereofI have-hereunto set my hand and seal in the presence of two witnesses. COURTLAND N. PACKER. [L. s.]

Witnesses:

LUELLA G. GREENFIELD, MARGARET L. GLAsoow.