US1342273A - Lubricating system for internal-combustion engines - Google Patents

Description

H. H. BLACHE.

LUBRICATING SYSTEM FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED AUG-2. 1919. 1,342,273.

Patented Julie 1,

m m w d c f a X 6 f mv Z UNITED STATES PATENT OFFICE.

fIH IANS HENRIK BLACHE, OF HELLERUP, NEAR COPENHAGEN, DENMARK.

LUBRICATING SYSTEM FOR INTERNAL-COMBUSTIQN ENGINES.

Specification of Letters Patent.

Patented June 1,1920

Application filed August 2, 1919. Serial No. 315,024.

Combusti0n Engines, of which the following is a specification.

In internal-combustion engines of the kind in which there is used a loose cylinderlining which is fastened only adjacent of the cylinder head, the supply of lubrlcatlng 011 to the piston. is subject -to some difliculties, because the lubricating oil should be supplied to the cylinder at the highest possible.

level. In other words, the oil should be pumped into the cylinder at so high a level, at least, that it will enter below or close to the topmost piston ring, when the piston occupies its lowest position. In order to have the oil supplied so far up in the cylinder, it is necessary to supply the oil by way of a channel passing through the cooling water chamber. As the cylinder and the cylinder-jacket encircling the cooling-water chamber expand differently, it has obviously been necessary to place an elastic packing around the oil-supply pipe, at the point where the latter passes through the cylinder-'acket.

T e above mentioned construction suffers from the drawback that it renders the removal and insertion of the cylinder-lining very diflicult, and as this removal and insertion of the lining must be performed now and then, partly in order to clean the lining on the outside and partly in order to bore it on the inside, the construction has demonstrated itself to be very unsatisfactory, as the holes for the several oil-pipe'nipples, usually provided along the circumference of the cylinder, may not easily be located exactly in line with the holes in the jacket.

The present invention remedies this defeet by supplying the lubricating oil through a bore in the cylinder-lining below the water-jacket of the cylinder, and by providing a scraper-ring, which reaches below the oil-supply opening, when the piston is in its.

bottommost position, and whose scraping edge turns upward, or by boring a preferably vertical channel in the cylinder-lining, so that the oil from the supply-pipe is conveyed, through this channel, sufiiciently far up in the lining, before it is directedtoward the piston, by way of-a channel leading to the interior of the cylinder.

The accompanying drawing illustrates both the known construction,'- and some manners of constructing the present invention.

F lgure 1 shows a. vertical section of the cylinder-lining, the cylinder-jacket and thepiston, and of the known supply arrangement for the lubricating oil.

Figs. 2, 3 and 4 show similar sections of various structural embodiments of the present invention.

In Fig. 1, a indicates the cylinder-lining, whichis fastened at its top, near the cover 6, to the cylinder-jacket c. The

cooling-water chamber is marked at, while e indicates the piston and f the topmost piston-ring being, for the bottommost posit1on of the piston, only slightly'above the lubricating-pipe nipple g, which is inserted' through the jacket 0 and is screwed into the cyl1nder-1ining"a.' Between the lubricating-pipe nipple g and the jacket 0, there is provided an elastic packing 71 allowing the lining and the jacket to expand differently, without the lubricatingpipe. nipple being appreciably influenced thereby. 'h indicates the pipe by way of which the. lubricating oil is supplied.

In the constructions of the invention shown in-Figs. 2 to 4, the corresponding parts are indicated inthe same manner as in Fig. 1. As it-appears from Fig. 2, the lubricating oil is supplied by way of a bore in the cylinder-lining below the Water jacket 0. By this construction, the oil is lifted up into the cylinder by using, according to the present invention, a scraper-ring p located so far down on the piston, and so far below the bottommost piston ring is that it will reach below the oil-supply opening when the piston is in its bottommost position. The scraper-ring p consists, of

.known manner, of a resilient piston-ring turned down obliquely on the face touching the cylinder, as indicated for the face Z, while the top edge in the ring is sharpened. This ring will slide on top of the film of lubricating oil during the. downward motion of the piston, while during the upward motion of the piston it will scrape the oil upward along the cylinder, so that the oil will be deposited far up in the cylinder, before the scraper-ring.p again moves downwardwith the piston.

Fig: 3 shows a'modified manner of constructing the invention. The lubricating oil is not conveyed directly into the cylinder below the water-jacket a, but passes through a channel 12, which is bored in the lining d farther up in the cylinder, where it flows in through the horizontal channel 0 'above the scraper-ring p, which owing to theuse of the channel n does not have to be located so far down on the piston as mentioned above. By means of the channel a, the advantage is attained that the scraper-ring does not have to' lift theoil as far .up in the cylinder as it would be [necessary if the channel n had been omitted. If desired, the vertical channel, or channels, 11 may be made so long that the oil is conveyed. up to a point on the cylinder wall which is level with the top most piston-ring,- when the piston occupies its bottommost position. This is indicated in Fig. 4, where the second piston-ring from the top is replaced by a scraper-ring g,of the same construction as the before-mentioned scraper-ring p. By the construction shown in Fig. 4, the advantage is attained that the scraper-ring q will lift the oil clear up to the top end of the cylinder.

I claim as my invention:

1. The combination of a water-jacketed cylinder; a piston working therein and provided with a set of packing rings, and with a scraper ringj distinct therefrom; and a lubricant supply passage formed solely through the cylinder wall and having-its inlet end located below the water jacket and its outlet end opening through the inner face of said wall at a point which is approximately opposite the scraper ring when the piston occupies its lowermost position in the cylinder, whereby said scraper ring is enabled to scrape up the lubricant entering the cylinder through the outlet end of said passage and spread it in film form far up along said inner face of the cylinder during the upward movement of thepiston.

2. The combination of a water-jacketed cylinder; a piston working therein and provided with a set of packing rings and with a scraper ring distinct therefrom; and a lubricant supply passage formed vertically I in the cylinder wall and having its inlet end located below the water jacket and its outlet end horizontally through the inner face of said wall at a point-which is approximately opposite the scraper ring when the piston occupies its lowermost position in the cylinder, said scraper ring having an upwardly and outwardly inclined outer face to 'enable it to scrape up the lubricant entering the cylinder through the outlet end of said passage and spread it in film form far up along said inner face of the cylinder during the upward movement of the piston, and to slide over the fihn when the piston moves downward.

- 3. The combination of a cylinder; a piston working therein and provided with a set v ment of the piston, and to slide over the film when the piston mpves. downward.

4. The combination of a cylinder; a piston working therein and provided with a packing ring and with a scraper ring distinct from the packing ring; and a lubricant supply passage formed through the cylinder Wall and opening at its outlet end through the inner face of said wall at apoint which is approximately opposite the scraper ring when the piston oc- CHPIGS 1ts lowermost posltlon 1n the cylinder, whereby said scraper ring is enabled to scrape up the lubricant entering the cylinder through the outlet end of said passage and spread it in film form far up along said inner face of the cylinder during the upward movement of the piston, and to slide over the film when the piston moves downward. y

In testimon whereof I aflix my signature.

' ANS HE NRIK BLAUHE.

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