US2309434A

US2309434A - Diesel engine

Info

Publication number: US2309434A
Application number: US417707A
Authority: US
Inventors: Arena Frank
Original assignee: Individual
Current assignee: Individual
Priority date: 1941-11-03
Filing date: 1941-11-03
Publication date: 1943-01-26
Anticipated expiration: 1960-01-26

Description

Jan. 26, 1943.

F. ARENA DIESEL ENGINE Filed Nov. 3, 1941 2 Sheets-Sheet l I fla l/ 2 Araiza IN VEN 0R.

A'I'I'CIRNEYB Jan. 26, 1943. ARENA I 2,309,434

DIESEL ENGINE Filed Nov. 3, 1941 2 Sheets-Sheet 2 5e? INVENTOR, flank Arena.

Patented Jan. 26, 1943 UNITED STATES PATENT OFFICE DIESEL ENGINE Frank Arena, Elba, N. Y.

Application November 3, 1941, Serial No. 417,707

2 Claims.

My invention relates to internal combustion engines and has among its objects and advantages the provision of an improved Diesel engine.

An object of my invention is to provide a Diesel engine of the two-cycle type, wherein opposed pistons are connected with a crosshead to eliminate side thrust on the pistons, in which the engine is simple in construction and embodies relatively few parts so fashioned as to facilitate assembly and repair, and in which the engine is designed to operate efliciently and economically in the matter of fuel consumption.

In the accompanying drawings:

Figure 1 is a longitudinal sectional view of an engine in accordance with my invention;

Figure 2 is a sectional view taken along the line 2-2 of Figure 1; and

Figure 3 is an enlarged sectional view taken along the line 3-3 of Figure 1.

In the embodiment selected to illustrate the invention, two opposed pistons II) are connected as a unit through the medium of rods I2 secured to a crosshead pin l4 through the medium-of a bolted coupling I6. Each piston I operates in a. cylinder I8, the cylinders being arranged in axial alignment and bolted at 20 to a casing guide 22. This case is made up of two sections 24 fixedly secured in a unitary structure by bolts 26.

Each cylinder I8 is provided with a conventional fuel injection nozzle 28 communicating with a precombustion chamber 30 having communication with its respective cylinder. Conventional fuel injection pumps 32 are provided for the nozzles 28, which pumps are mounted on a gear case 34 projecting from one side of the casing guide 22. A shaft 36 is rotatably mounted in the gear case 34 and is provided with a cam 38 which operates the respective pumps 32.

To the shaft 36 is secured abevel gear 40 meshing with a bevel gear 42 keyed to a shaft 44. Rotation is imparted to the shaft 44 through the medium of a bevel gear 46 keyed to the shaft and meshing with a bevel gear 48 keyed to a shaft 50 provided with a bevel gear 52 meshing with a bevel gear 54 keyed to the crankshaft 56.

Reciprocatory motion of the piston stem transmits rotary motion to the crankshaft 58 through the medium of two arms 58, see Figure 2, extending through slots 60 in a crankcase 62 provided with crankshaft supporting bearings 64. Each arm 58 is connected with a crankpin 66 through the medium of a bearing 68, as well as with the crosshead pin I4 through the medi v to the other by bolts H2.

um of bearings 10. Two walls of the casing guide 22 are provided with slots I2 for guiding the crosshead pin I4 in its reciprocatory travel, which crosshead pin is provided with bearings I14 tguidably engaging the walls of the respective s o s.

Each cylinder head 16 is provided with an annular flange 18 within which is fitted a cage having a passage 82 communicating with its respective cylinder I3. The cages 80 are provided with valve seats 84 for coaction with exhaust valves 86 biased to a closed position by springs 88. Each cage 80 is provided with a guide 90 for the valve stem 92, and the cage is fixedly but detachably secured to its respective annular flange 18 by bolts 94 extending through openings in the cage flange 96 and threaded into the annular flange I8. Thus the valves 86 may be removed by unloosening the cage 80 and pulling the cages from the annular flanges. Gaskets 98 are provided for effecting a sealed condition between the cages 80 and the annular flanges 18.

One of the cylinder heads I6 is bolted at I00 to the upper cylinder I8 of Figure 2 and the lower cylinder head I6 comprises one wall of the crankcase 62, the lower cylinder I8 being secured to this cylinder head I6 by bolts I02.

In Figures 1 and 3, a cam I04 is secured to the shaft 36 for actuating rods I06 which operate rocker arms I08 acting on the valve stems 92. Figure 3 illustrates the gear housing 34 as comprising sections IIO fixedly secured one Each section H0 is cast integrally with one of the sections 24.

Each cylinder I8 is provided with a port H2 in its wall, which port has communication with the interior of the cylinder at its bottom end and at an intermediate point located to communicate with the space between the piston and the crosshead when the piston is in its lower position, as illustrated in connection with the upper cylinder of Figure 1. Each cylinder is provided with an air intake valve H4 biased to a closed position by a spring I I6. These valves open as their respective pistons progress in their compression strokes to fill the cylinder space underneath the pistons with air. The air is compressed as the pistons progress on their power stroke and is admitted to the combustionchambers as the pistons approach the ends of their power stroke. Thus the compressed air is delivered forcibly into the respective combustion chambers to aid in scavenging the chambers, as well as admitting air thereto which is necessaryfor combustion purposes.

Without further elaboration, the foregoing will so fully illustrate my invention, that others may, by applying current knowledge. readily adapt the same for use under various conditions of service.

I claim:

i. A Diesel engine of the two-cycle type comprising opposed cylinders arranged in axial alignment, a casing guide fixedly connecting said cylinders one with the other, said casing guide being provided with slots, pistons slidable in said cylinders, a crosshead member extending through said slots and slldably guided thereby, said pistons being fixedly connected with said crosshead member, an air inlet valve communieating with said cylinders andwith said casing guide, said cylinders being provided with air passages for delivering air compressed by the respective cylinders to their combustion chambers upon completion of the power strokes of the means for delivering fuel to the precombustion chambers, a cam on said shaft for actuating said fuel injection means, exhaust valves, means operatively connecting the exhaust valves with said shaft, a crank shaft, arms connecting said crosshead member with said crank shaft, and

gear means operatlvely connecting said crank shaft with said first-mentioned shaft.

2. The invention described in claim 1 wherein said cylinders are bolted to said casing guide, and wherein said arms are located exteriorly of said casing guide. 1

FRANK ARENA.