US1118047A - Lubrication of internal-combustion engines. - Google Patents

Description

P. A. POPPE.

LUBRICATION OF INTERNAL COMBUSTION ENGINES.

APPLICATION FILED SEPT. 24. 1913- 1 9 1 1 8 47, Patented Nov. 24, 1914.

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LUBRIOATION OF INTERNAL COMBUSTION ENGINES.

APPLICATION FILED $EPT. 24, 1913.

Patented Nov. 24-, 1914.

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UNITED STATES PATENT OFFICE.

PETER A. POPPE, 0F COVENTRY, ENGLAND.

LUBBICATION OF INTERNAL-COMBUSTION ENGINES.

Specification of Letters-Patent.

Patented Nov. 24, 1914.

Application filed September 24, 1913. Serial No. 791,449.

be employed in the lubrication system so that oil is deliveredto each bearing, etc., in turn, but with the usual arrangement a considerable amount of piping is necessary to connect the distributer to the various parts to be lubricated, which is obviated in an extremely simple manner by the present invention. Accordingly, the oil is supplied to a hollow rotating or oscillating shaft, and the shaft is formed with port openings as close as is possible, or convenient, to the parts to be lubricated, and each of these in turn, as the shaft rotates, comes into register with passages along which the oil is delivered. The hollow shaft therefore constitutes an oil pipe running lengthwise of the engine, and also a distributer. Conveniently the hollow shaft may be constituted by one or both of the engine cam shafts, and

it is naturally preferred that oil passages be formed in the bearing bushes of such shaft so that these bushes are lubricated simultaneously with those of the crank shaft or other parts to which the oil is delivered.

- In the accompanying drawings, Figure 1 is a longitudinal section of part of a four cylinder internal combustion engine, representing diagrammatically one method of carrying out this invention. Fig. 2 1s a vertical section through part of the valve mechanism of an internal combustion engine illustrating another application of the invention, while Fig. 3 is a sectlonal view of a part shown in Fig. 2, the valve rocker being in a different position.

Like letters indicate like parts throughout the drawings.

In the case shown in, Fig. 1 the cam shaft A is arranged slightly above the engine crank shaft B as is usual, and the cam shaft is hollow, receiving oil from a supply pipe C which by means of asuitable connection at D has an oil tight joint with the rotating cam shaft. Both the cam shaft and the crank shaft are in. this case represented as being mounted in three bearings,

one at each end with the third in the cen--v ter, and" the oil admitted to the hollow cam shaft is delivered to each of the cam shaft and crank shaft hearings in turn. Adjacent to each cam shaft bearing is formed a port opening E in the shaft, and at a certain point in the revolution of the crank shaft each port opening is adapted to register with an oil duct F so that the oil in the cam shaft is supplied to the crank .shaft bearings.

The crank shaft bearings are represented as being supplied with oil under pressure, a duct F communicating direct with the bearing bushes J. Where pressure feed-to the bearings is desirable, it will be clear that this invention complies with requirements in an extremely simple manner. E when not in register with the ducts F supply lubricant under pressure to the adjacent cam shaft bearings, and once er revolution to the crank shaft bearing. y increasing the number of port openings the supply of lubricant may be increased and it is preferable that the port be so arranged that the crank shaft bearings are supplied with oil during, or just prior to, the period when they receive the greatest load.

In many cases oil is required at some other point, such as the cylinder walls. In such instances port openings in the cam shaft may be adapted to communicate with branch pipes, of which one, K,,is illustrated, and these pipes may lead to any suitable point. In the case of cylinder wall lubrication this invention may be most usefully employed as the oil may be fed to a point in the cylinder The ports may be so situated that the oil isonly supplieid when the cylinder wall oil inlet is covere Where an engine with the cylinders arranged in rows at an angle to one another is employed the invention may be well applied to the cam shaft which is arranged centrally between the cylinders. The oil may be fed to the pipe C either by gravity or by a pump in any well-known manner; It is not essential that the shaft employed be the main engine cam shaft. Any suitable shaft may be utilized, and the invention may be applied to other parts of the engine, as shown in Figs. 2 and 3 which illustrate an engine valve L which is opened by the movement of a rocker M through the medium of a push rod N. The rocker is hollow, as also is the pivot 0 upon which it is mounted. ..The pivot and the bush are both formed with port openings P which are in and out of register according to the positions of the rocker. The pin at B may be similarly provided with port openings, and it will be clear that the oil supplied to the hollow pivot O is caused, when the rocker is in the position illustrated in Fig. 3, to lubricate the pivot of the rocker. With the rocker in the position illustrated in Fig. 2 the oil travels to the pivot R and lubricates this. It then travels down the hollow push rod N to any suitable point such as the engine crank chamber. In a multicylinder engine the pivot 0 may be constituted by a tubular shaft connected .to the oil supply. It will be obvious that in place of using one of the ordinary engine shafts a specialshaft may be provided;

What I claim as my invention, and desire to secure by Letters Patent, is

1. In an internal combustion engine, a hollow shaft having port openings therein, means for supplying oil under pressure thereto, a sleeve surrounding said shaft and having port openings communicating with the parts to be lubricated, means for causing relative angular movement between said 3 shaft and said sleeve, and for causing the openings in the shaft to register one at a time with those in the sleeve.

2. In an internal combustion engine, a hollow shaft having port openings therein, means for supplying oil under pressure thereto, bearings for said shaft having port openings communicating with the parts to be lubricated, and means for causing said openings to register one at a time with the port openings in the shaft.

3. In an internal combustion engine, a hollow rotating cam shaft having port openings therein, means for supplying oil under pressure thereto, bearings for said shaft having port openings communicating with the parts to be lubricated, and adapted to register one at a time with the port openings in the shaft.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

P. A. POPPE.

Witnesses:

ANTON HAUCHE, R. LEHMANN OLSEN.

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