US1568964A

US1568964A - Internal-combustion engine

Info

Publication number: US1568964A
Application number: US727727A
Authority: US
Inventors: Harry A Douglas
Original assignee: Individual
Current assignee: Individual
Priority date: 1924-07-23
Filing date: 1924-07-23
Publication date: 1926-01-12
Anticipated expiration: 1943-01-12

Description

11.. A. DOUGLAS INTERNAL COMBUSTION ENGINE Filed July 23, 1924 1Q 2a \2 4; 16/4/24 I '6,

Jan. 12 ,11926. 1,568,964

Patented Jan. 12, 1926.

UNITED- STATES).

PATENT OF ICE.

i maze. nouems, or nonson, men-rem.

mmnn-courusrron Enema. 1

To all whom it may conceM." A

, Be it known that I, HARRrA. DOUGLAS, a citizen of the United States, residing at Bronson, in the county ofBranch and the State of Michigan, have invented a certain new and useful Improvement in Internal- Oombustion Engines, of which therfollowing is a full, clear, concise, and exact deceives the piston.

The invention will be more fully explained in connection with the accompanying drawing in which Fig. 1 isIa-transverse sectional view showing the engine at the initiation of the explosion; Figs. 2, '3, 4 and .5 are sectional views illustrating different stages of operation; and Fig. 6 is a sectional view on line 6-6 of Fig. 1.

The invention illustrated includes an externaL cylinder 1 and aninteriorworking cylinder 2. V cally related'and are respectively provl with adjacent end walls 3 and 4 which, with the vertical walls thereof, define .a fuel re,

, ceiving cham er of variable capacity. A

cylinder 2, this piston be1ng connected miston 5 is reciprocable within the inner any suitable way with they engine shaft 6, as by means of the pitman 7 connected at one endwith the wrist pin 8 that is within the piston and at its other end with thecrank pin 9, carried upon the outer end of the crank 10 that is provided upon the shaft 6.

Mechanism is employed for effecting relative reci rocation of the cylinders. In the preferre embodiment of the. invention, the

inner cylinder 2 is-alone reci rocated, the outer cylinder 1 being desira 1y upon the engine crank case 11. from which crank case lubricant is supplied to the wearing surfaces of the cylinders, the piston and the pitman These cylinders are telescodpi-' connections. The mechanism illustrated for reciprocating the inner c linder 2 is inclusive of a block 12 s line upon the pitman and ressed outwardly by a spring 13 surroun ing the pitman and bottomed thereon. The cylinder 2 is partially-closed b a plug 14 screwed in its inner ,end, a narrow slot 15 (Fig. 6) being left, within which the pitman mayplay. The cylinder 2 takes the thrust of the spring 13-through the intermediation of the 'block 12 and plug 14. The

spring 13 moves the cylinder 2 outwardly upon the first part of the outward strokeofv this cylinder, the outwardly moving piston engaging the shoulder '16 in the outer end of the cylinder 2 to complete the outward movement of the cylinder 2.

The engineillustrated, being a two stroke per cycle engine, explodes previousl com pressed gaseous fuel and prepares. or the reception of a fresh charge of fuel during the downward or inward stroke of the engine piston. During this downward stroke,

- vacuum is partially effected in the space between I the cylinder end. walls 3 and 4 due to the engagement of the piston with the top side of plugv 14 that is effected when the pi s- .v

.ton reaches the mid-p0 'ion of its inward or downward movement, the spring 13 then yielding to preserve the normal relation of the pitman and engine crank. During the first part of this downward movement, vacuum'is effected between the end walls 3 and- 4 of the cylinders. When the inward or downward movement of the piston and of its cylinder 2 are nearing completion, the

rushes into the space between said 0 linder end .v'valls to replace the vacuum, ig. 3. When the intake port is opened, the ort 18 in the inner cylinder, through whic compressed fuel was received, as will apear, is placed in register with the exhaust port 19 that is provided in the outer cylinder 1 so that the piston, in its outward or return movement, may force the expulsion of the spent gas from'the cylinder 2, an operation known as scavenging. During the scaveng I ing motion of the piston, the spring 13 is effective to close ports 17 and 18 and to initiate-the compression of. the fresh fuel in i the space between the cylinder end walls 3" and 1. The compression of the fuel is thereafter mainl effected by the outwardl moving piston ue to its engagement wit fuel intake port 17 is opened and the fuel theshoulder of theinner cylinder, Fig.

5. The bore of the cylinder 2 has a lateral recess extension 20 with which the port 18 is brought into communication. When the compression of the fuel has been completed, the recess at 20 conveys the compressed fuel to the port 18 through which the fuel flows into the interior of the c linder 2 between the end wall 4 of this cylinder and the piston, the shoulder 16 maintaining a space in the cylinder 2 for receiving the compressed fuel.

The compressed fuel thus admitted to the working cylinder 2 is ignited by any suitable ignition means such as a spark plug 21 whose circuit is governed by some engine driven device to cause the sparking and consequent ignition to occur upon the transfer of the compressed fuel. As illustrated, plug 21 is carried by the outer cylinder 1 in the recess 20, although the invention is not to be limited to the assembly of the igniting means directly with the outer cylinder. The fuel is exploded while the cylinder end walls are in engagement, the piston being moved inwardly along the inner cylinder until it engages the block 14 carried by the inner cylinder, with results effected in orderl sequence, as hereto set forth.

C anges may be made without departing from my invention.

Having thus described my invention, I claim z-' i v.

1. An internal-combustion engine including two telescopically related cylinders having adjacent portions defining a chamber of variable capacity, there'being ports for admission of fuel and the exhaustion thereof when spent and for admitting fuel from the chamber of variable capacity into the inner cylinder, and valving means governed by the engine and governing said ports; a plston in the inner cylinder; yielding motion transmitting mechanism interposed betweenthe engine crank and the inner cylinder to move this cylinder in a fuel com- 'pressing direction; and ignition means in position'to ignite the fuel passed into the inner cylinder from thechamber of variable capacity."

1. An internal combustion engine including two telescopically related cylinders having'adjacent portions defining a chamber of variable capacity, there being ports for admission'of fueland the exhaustion thereof when spent and for admitting fuel from the chamber of variable capacity into the inner cylinder and valving means governed. by the engine and governing said ports; a.

piston in the innercylinderymotion transmitting mechanism interposed between the engine crank and the inner cylinder to move this cylinder in a fuel compressing direction partially throu bout the compression stroke of thisfcylin er, the piston having lost motion engagement with the inner cylrection of the latter to complete this compression; and ignition means in position to ignite the fuel passed into the inner cylinder from the chamber of variable capacity.

8. An internal combustion engine including two telescopically related cylinders having adjacent portions defining a chamber of variable capacity, there being ports for admission of fuel and the exhaustion thereof when spent and for admitting fuel from the chamber of variable capacity into the inner cylinder, and valving means governed by the engine and governing said ports; a piston in the inner cylinder; yielding motion transmitting mechanism interposed between the engine crank and the inner cylinder to move this cylinder in a fuel compressing directionpartially throughout the compression stroke of this cylinder, the piston having'lost motion engagement with the inner cylinder when moving in the compressing direction of the latter to complete the compression; and ignition means in position to ignite the fuel passed into the inner cylinder from the chamber of variable capacity.

4. An internal combustion engine including two telescopically related cylinders having adjacent portions defining a chamber of variable. capacity, there being ports for admission of fuel and the exhaustion thereof when spent and for admitting fuel from the chamber of variable capacity into the inner cylinder, and valving means governed by the engine and governing said ports; a.piston in the inner cylinder, the piston having lost motion engagement with the inner cylinder to move it in a compressing direction; and ignition means in position to ignite the fuel passed into the inner cylinder from the chamber of variable capacity.

5. An internal combustion engine including'two telescopically related cylinders having adjacent portions defining a chamber of variablecapacity, there being ports for admission of fuel and; the exhaustion thereof when spent and for admitting fuel from the chamber of variable capacity into the inner cylinder, and valving means governed by the engine and governing said ports; a piston in the inner cylinder, the iston having lost motion engagement wit the inner cylinder to move it in a com 'ressing direo tion, and in a reverse direction to enlarge chamber of variable capacity into the inner the engineand -ton in the innercylinder; motion transmitting mechanism interposed between the encylinder, and valving means governed by vthe engine and governing said ports; a piston in the inner cylinder, the piston having lost motion engagement with the inner cylinder to move it to enlarge said chamber;

and ignition means in position to ignite the fuel passed into the inner cylinder from the chamber of variable capacity.

'7. An internal combustion engine including two telescopically related cylinders having adjacent portions defining a chamber of variable capacity, there being ports for admission, of fuel and the-exhaustion thereof when spent and for admitting fuel from the chamber of variable capacity into the inner cylinder, and valving means governed by governing said ports; a pisgine crank and the inner cylinder to move this cylinder .in a fuel compressing direction, the piston having lost motion engagement with the inner cylinder to 'move it in a direction to enlarge said chamber and open the intake port; and ignition means in position to i nite the fuel passed into the inner cylinder rom the chamber of variable capacity.

' 8. An internal combustion engine including two telescopically related cylinders having adjacent portions defining a chamber of. variable capacity, there being ports for admission of fuel and the exhaustion thereof when spent and for admitting fuel from the chamber of variable capacity into the inner cylinder, and valving means governed by the engine and governing said ports; a piston in the inner cylinder; yielding motion transmitting mechanism interposed between the engine crank and the inner cylinder to move this cylinder in a ,fuel compressing direction, the piston having ment with the inner cylinder to move it in a direction to enlarge said chamber and open the intake port; and ignition means in po- I sition to ignite the fuel passed intothe inner cylinder from the chamber of variable capacity.

v 9. An internal combustion engine including two telescopically related cylinders havlost'motion engageof variable capacity, there being ports for ing adjacent portions defining a, chamber admission of fuel and the exhaustion thereof when spent and for admitting fuel from the chamber of variable capacity into-the inner cylinder, and valving means governed by the engine and governing said ports; a piston in the inner cylinder; motion transmitting mechanism interposed between the en- 10. An internal combustion engine including two telescopically related cylinders having adjacent portions defining a chamber of variable capacity, there being ports for admission of fuel and the exhaustion thereof when spent and for admitting fuel from the" chamber of variable capacity into the inner cylinder, and valvin means governed bythe engine and governing said ports; a

piston in the inner cylinder; yielding motion transmitting mechanism interposed between the engine crank and the inner cylinder to move this cylinder in a fuel compressing direction partially throughout the compression stroke of this cylinder, the piston having lost motion engagement with the inner cylinder when moving inthe compressing direction of the latter to complete the compression and whenmoving in the, reverse direction to enlarge said chamber and open the inlet port; and ignition means in position to ignite the fuel passed into the inner cylinder from the chamber of variable capacity.

my name.

' HARRY A. DOUGLAS.

In witness whereof, I hereunto subscribe