US1914499A

US1914499A - Internal combustion engine

Info

Publication number: US1914499A
Application number: US407090A
Authority: US
Inventors: Geisse John Harlin
Original assignee: Individual
Current assignee: Individual
Priority date: 1929-11-14
Filing date: 1929-11-14
Publication date: 1933-06-20
Anticipated expiration: 1950-06-20

Description

June 2@, W33. H @5555 33145499 INTERNAL COMBUSTION ENGINE Filed Nov. 14, 1929 2 Sheets-Sheet 1 Flql INVENTOR ATTORNEY June 2% @330 J. H. GEESSE INTERNAL QOMBUSTIIIONv ENGINE Filed Nov. 14 1929 2 Sheets-Sheet 2 FI Z INVENTOR ATTR/(EV Patented June 20, 1933) PATENT OFFIQE JOHN HARLIN GEISSE, OF MADISON, WISCONSIN INTERNAL COMBUSTION ENGINE Application filed November 14, 1929. Serial N 0. 407,090.

(GRANTED UNDER THE ACT OF MARCH 3, 1883, AS AMENDED APRIL 30, 1928; 370 0. G. 757) My invention relates broadly to an in-' ternal combustion engine and more particularly to an air-cooled engine.

Tests of conventional air-cooled radial engines have revealed that the head resistance of such engines is extremely high, requiring even in a well designed engine an expenditure of of the power output to overcome it at a plane speed of 100 miles per hour. 13 At higher plane speeds the resistance increases and still more of the power is used in pro pelling the engine through the air. A considerable portion of this head resistance is due to the overhead valve mechanism.

It is an object of my invention to decrease this head resistance to a minimum. This is accomplished by providing a radial engine having T head cylinders with the valve chambers below the top of the piston when 39 the latter is at the top of its stroke. This not only eliminates the overhead valve mechanism but also shortens the cylinder and pro-- vides a more or less eliptical shape at the top which offers less resistance than does a true cylindrical shape having-the same frontal area.

In the conventional type of radial aircraft engine, push rods and rocker arms are required to operate the valves. These parts 33 are practically the only parts needing lubrication Whiclrcan not be readily lubricated by the main lubrication system. Therefore it has been necessary to lubricate these parts manually. The push rod ends are difiicult to lubricate and have been a source of trouble. By the use of a T head cylinder these elements are eliminated entirely. p

p In most of the overhead valve engines the valves have been placed side by side with respect to the air stream for construction reasons. This arrangement does not provide any better cooling air conditions for the exhaust than for the intake and the exhaust side of the head operates at a temperature considerably greater than that of the intake. The exhaust valve in an engine constructed in accordance with my plan is'placed'at the front of the cylinder, in the air stream, where 1 it gets the best cooling conditions. With the above and other objects in View the invention consists in the construction,

combination and arrangement of parts as will be descrlbcd more fully hereinafter.

Reference is to be had to the accompanying drawings, forming a part. of this specification, wherein like reference characters indicate corresponding parts throughout the several views,and wherein F1gure 1 is a cross section through an enginie cylinder in the plane of the crankshaft, an

Figure 2 is a cross sectional View taken on a line at right angles to the view shown in Figure 1. Referring moreparticularly to the drawlngs, 1 indicates the crankcase of an internal combustion engine and 2 the crankshaft thereof. Movement is imparted to the crankshaft by piston 3 in the usual manner through connecting rod 4. The piston is operable 1n cylinder 5 and bears on liner 6 therein, the liner extending to the cylinder head 7 on the thrust and anti-thrust sides of the piston as at 6a. The liner is shrunk in the cylinder which is made as short as manufactun ing tolerances on the piston head and cylinder head will permit. Valve chambers 8 extend laterally from the cylinder at its top and communicate therewith through the openings formed by the shorter length of the liner. To provide the combustion chamber volume required to secure the .desired compression ratio, the valve seats 9 are placed in the chambers below the top of the piston when the latter is at the top of its stroke. The valves, seating on seats 9,'aredesignated 10 for the intake and 11 for the exhaust, and are operated by cams 12 through cam followers 13. The mechanism for operating the cams is not illustrated as it does not form a part of the present invention. In the arrangement of valves with respect to the cylinder, the

mally operate at a temperature considerably higher than that of the intake side.

It will be understood that the above description and accompanying drawings comprehend only the general and preferred embodiment of my invention and that various minor changes in details of construction, proportion and arrangement of parts may be made Within the scope of the appended claims and Without sacrificing any of the advantages of my invention.

The invention described herein may be manufactured and used by or for the Government of the United States for governmental purposes Without the payment to me of. any royalty thereon.

Vhat I claim is:

1. In an internal combustion engine, a cylinder, a piston operable therein, and a bearing surface in the cylinder for the piston, said bearing surface extending higher on the thrust and anti-thrust sides than it does on the other two sides.

2. In an internal combustion engine, a cylinder, a piston operable therein, and a liner within the cylinder, said liner extending higher on two portions than on the other two portions.

3. In an internal combustion engine, a cylinder, a piston operable therein, and a liner within the cylinder, said liner extending higher on two opposed portions than on the other two opposed portions.

JOHN HARLIN GEISSE.