US2394970A

US2394970A - Internal-combustion engine

Info

Publication number: US2394970A
Application number: US552349A
Authority: US
Inventors: Charles N Aronson
Original assignee: Individual
Current assignee: Individual
Priority date: 1944-09-01
Filing date: 1944-09-01
Publication date: 1946-02-19
Anticipated expiration: 1963-02-19

Description

Feb. 19, 1946. I c. N. ARON SON INTERNAL-COMBUSTION ENGINE- Filed Sept. '1, 1944 Patented Feb, 19, 1946 UNITED STATES PATENT OFFICE v 2,394,970 I I INTERNAL-COMBUSTION ENGINE- I Charles N. Aronson, Niagara Falls, N. Y. Application September 1, 1944, Serial No. 552,349

2 Claims.

This inventionrelates to new and useful improvements in internal combustion engines of the two-cycle type wherein a rotary valve is generally employed to introduce the combustible charge into the crankcase on the up-stroke of the piston and where the charge is subsequently compressed on the down-stroke. In the conventional engine of this type, it has been customaryto cut slots in the regular size main bearing journals and due to the small normal size of these journals, the slots had to be quite small.

It is the principal object of the present invention to provide an engine of the two-cycle type wherein the fuel charge is compressed within the crankcase with enlarged bearing journals formed with fuel admission slots and wherein the large journals are formed to a running bearing fit in the crankcase" itself.

Another important object of the invention is to provide journals of the character stated which :because of their size have a flywheel efiect, thus eliminating the need for a flywheel and because of the presence of these large journals between the cylinders with their flywheel effect, the engine has a tendency to run much smoother than otherwise.

Still another important object of the invention is to provide journals of the character stated especially for two-cycle engines which because of their size will be far easier to grind than those present in most conventional types of engine.

Still a further object of the invention is to construct a motor with journals of the character stated Which will have an overall simplicity which will permit its manufacture at a much lower cost than engines of this type.

Various other important objects and advantages of the invention shall become apparent to the reader of the following description.

In the drawing Figure 1 represents a fragmentary vertical vsectional view through a two-cycle engine showing the journals as improved. Figure 2 is a vertical sectional view (fragmentary) taken on the line 2-2 of Figure 1.

Figure 3 is a top plan view of the improved crankshaft.

Referring to the drawing wherein like numerals desigate like parts, it can be seen in Figure v1 that numeral 5 denotes a crankcase from which rise cylinders 6.

The crankcase is formed to directly contact the journals of the improved crankshaft generally referred to by numeral 1.

As shown in Figure 3, the shaft I includes end journals 8, 9 which are not slotted for the admis- Spaced between the journals 8, 9'

sion of fuel. are three large journals III, II and I2. Assuming that this crankshaft is to take care of a fourcylinder engine, it can be seen that the journal I 0 is slotted at l3 to open through one side thereof to accommodate one'end cylinder. This same journal [0 is slotted as at M to open at its opposite side to take care. of a cylinder next to said end cylinder.

The journal II is unslotted, but the journal 12 is slotted in the same manner as the journal l0,

. the same having a. slot l5 opening through one 'side to accommodate the other end cylinder and a slot I 6 opening through the opposite side of the same to accommodate the cylinder next to the last-mentioned end cylinder.

Thus it can be seen, that at each side of the slotted journals l0, l2, there is an unslotted journa1,- these unslotted journals being denoted by numerals 8, H and 9.

As can be seen in Figure 2, the side of the crankcase 5 has a manifold ll communicating with channels l8 opposed to the journals I2 and I0. Thus it can be seen, that'for the period of the up-stroke of a piston, fuel is being taken in to the crankcase, below its piston by way of the manifold ll, channel I8 and slot in the journal. Of course, on the down-stroke this charge is compressed. A

While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.

.Having described the invention, what is claimed as new is:

1. In an engine of the character stated comprising a crankcase, a plurality of cylinders, a crankshaft, said crankshaft being provided with alternately slotted and unslotted enlarged journals, the ends of the crankshaft being provided with unslotted journals, each slotted journal being formed with two slots opening through op- !posite sides of the journal, and means for supplying fuel to the crankcase compartments defined by the journals by way of said slots for compression by pistons in the cylinders."

2. Ina two-cycle engine, a crankcase, a crank shaft, said crank shaft being provided with an enlarged cylindrical journal fitted rotatably but tight in a circular opening in a part of the crank case constituting a wall of a fuel supply compartment for a working cylinder of the engine,

said crank case having a fuel charge admission channel the open side of which is communicable throughout a substantial distance" annularly of the crank shaft journal, said fuel charge admission channel being generally covered in closing relation by said crank shaft journal, said crank shaft journal being formed with a transverse peripheral fuel conducting. slot which is closed at one end and open at its other end at one side of the Journal and communicable with the adjacent fuel supply compartment during a part of 5 the rotation of said journal.

CHARLES N. ARONSON.