US1837359A

US1837359A - Means for lubricating internal combustion engines

Info

Publication number: US1837359A
Application number: US193769A
Authority: US
Inventors: Dupont Eleuthere Paul
Original assignee: Individual
Current assignee: Individual
Priority date: 1927-05-24
Filing date: 1927-05-24
Publication date: 1931-12-22
Anticipated expiration: 1948-12-22

Description

Dec. 22,- 1931. E: p, u o -r 1,837,359

MEANS FOR LUBRIGATING INTERNAL COMBUSTION ENGINES Filed May 24, 1927 cylinder walls and provide means for effectively particularly f of lubricant on starting.

Patented Dec. 22, 1931 UNITED STATES ELEUTHERE PAUL nuron'r, or mom'cnanm, nmwm mus ron. aunnrcarme manna". comusrron enemas J Application filed May 24, 1927. Serial; No. 193,769.

Myinvention relates to means for lubricating internal combustion engines and more to means for affording a supply to the cylinders of an engine As is Well known, when an internal combustion engine is idle for a time, the lubricating oil drains away from the cylinders, 80 that when the engine is started the cylinders' are without lubrication until the oiling system with which the engine is provided has had time to supply lubricant to the cylinders. 1 In cold weather when the lubricating oil thickens and in engines of the type in which the cylinders are lubricated by oil' escaping from the connecting rod hearings, to which I it is supplied through a passage formed in the crank shaft, a very substantial period of time elapses between the starting of the engine and the effective supply of oil to the cylinder walls. During such period of time the cylinder walls are without effective lubrication, with the result that the pistons are subjected to frequently more posiexcessive wear and t-ively damaged.

Now, it is the object of my invention to lubricating the cylinders on starting and until the main lubricatingsystem vof the engine becomeseffectiv'e for their lubrication.

-Having now indicated, in a general way, the nature and purpose of my invention, I will proceed to a detailed descriptionthereof with reference to the accompanying drawing in which there is illustrated a preferred embodiment and in. which The figure is a sectional view of an engine embodying my invention.

In the drawing a indicates a c linder provided with an intake valve 6 an an exhaust valve 0, which control suitable intake and exhaust passages. Within the cylinder is ,a.

piston (Z connected by means of a rode with a crank shaft f suitably mounted in a crank case g. p 1 g The engine.- illustrated, which is of the ninlti-cylinder type, is provided with any gusualtypeofbihng system and a sump k is provided beneath the crank case to hold a supply of lubricating oil. Within the sump. h is positioned a cylinder 23 within which is a piston j adapted to be operated against'the action of a spring lg. A lip Z is formed on the upper end of the cylinder 2' to enableoil to enter the cylinder beneath the piston y when it is in raised position.

The cylinder z' is connected at its lower-end by means of a pipe m with-a header n, which egtendslengthwise of the engine Above the header n and opposite to each of the cylinders" of the engine is positioned a chamber 0. The several chambers are. each connected to the header n by means of a pipe p entering the chamber at its lower end and equipped with a check valve 9, and each chamber is connected at a point near its lower end to the interior of a cylinder by means of apipe r.

The piston y in the cylinder 71 is connected. by means of a rod 8 to an arm t extending from the casing of the engine starting motor '0. The starting motor '0 is mounted so as to be rotatable through part of a revolution when it is energized for starting theengine.

' The operation of the device above de- 75 scribed will be clear when it is noted that when it is started the starting motor will be revolved the direction of the arrow by raction when it initially attempts to turn over the engine. The revolution of the starting motor will be stopped and the motor made rigid when the arm contacts with the crank case.

' The revolving of the starting motor causes the piston j'in the cylinder to be depressed causing oil, which has flowed in-and filled the cylinder since the last operation .of the piston, to be forced into header and from thence into the chambers 0. As oil is forced 9o 7 .into the chambers 0, it compresses air in the top of the chambers and when the piston j is fully depressed, the check valves gprevent return of the oil to the header. The oil in chambers o is then forced by the compressed air into the cylinders and since a substantial quantity of oil is provided to each of the chambers the flow to the cylinders continues for an appreciable time-as the eng ne is started, effectively lubricating the cy mders 1 until the lubricating system of the engine becomes effective to lubricate them.

It will be noted that since the oil is sup plied to chambers 0, from which it flows to the cylinders under the influence of compressed air, as a result of a turning movement of the starting motor casing due to reaction from the engine which it seeks to turn over, no manual effort is necessary to lift the oil to chambers 0; and it will be further noted that oil is supplied to and begins to flow to the cylinders from the chambers 0 at the time when the engine is initially turned over by the starting motor. The flow of oil to the cylinders is, it will be noted, positively effected under the influence of the air compressed in the chambers by the oil forced therein by the piston 3'.

When the chambers 0 are emptied, lubrication from that source ceases until the engine is stopped and again started.

Having now fully described my invention, what I claim and desire to protect by Letters Patent is i 1. Means for lubricating an engine on starting, which includes in combination, a

starting motor, an oil pump, means aifording a conduit for the passage of oil from the pump to a cylinder of the engine and means affording an operative connection between the starting motor and pump, the starting motor being so mounted as to turn bodily when initially energized to effect operation 2. Means for lubricating an engine on starting, which includes 1n combination, a

' starting motor, in driving relation with the engine, an oil pump, means afiording a conduit for the passage of oil from the pump to a cylinder of the engine and means afli'ording an operative connection between the starting motonand the pump, the starting motor being revolubly mounted and adapted to be bodily rotated by reaction on being initially energized and to thereby eifect operation of the pump before driving the engine.

3. Means for lubricating an engine on start ng, which includes in combination, a startmg motor, an oil pump, a chamber, conduits for the passage of oil from the pump to the chamber and from the chamber to a cylinder of the engine, and means affording a connection between the starting motor and the pump, the starting motor being so mounted as to turn bodily when initially energized to efiect operation of the pump.

4. Means for lubricating an engine on starting, which includes in combination, a starting motor, an oil pump, a chamber,conduits for the passage of oil from the pump to the chamber and from the chamber to a cylinder of the engine, a check valve adapted to prevent the return of oil from said chamber to the pump and means affording a connection between the starting motor and the pump, the starting motor being so mount- I ed as to turn bodily when initially energized to eifect operation of the pump.

5. Means for starting, which comprises in combination, a starting motor in driving relation with the engine, an oil pump, a series of chambers corresponding in number to the number of cylinders of the engine, a header, a conduit for the passage of oil from the oil pump to the header, conduits affording passages for oil from the header to said chambers, check valves controlling said conduits, conduits affording passages for oil from each of said chambers to the cylinders of the engine respectively and means affording an operative connection between the starting motor and the oil pump, the startin motor being revolubly mounted and adapte on being initially energized to bodily rotate to actuate the oil pump before driving the en- 01I16. b 6, In combination with an engine cylinder having a reciprocating piston therein, lubricating means for said cylinder comprising a chamber, a conduit joining said chamber and cylinder and entering a portion of the cylinder wall covered by the piston during a portion of its stroke, and a second conduit communicating with said chamber, said chamber being closed above the points of communication of the conduits to form an air dome, whereby, when lubricant is forced into said chamber through said second conduit, air is compressed in said chamber, the expansion of which air causes lubricant to flow through the first mentioned conduit into said cylinder.

7. In combination with an engine cylinder having a reciprocating piston therein, lubricating means for said cylinder comprising a chamber, a conduit joining said chamber and cylinder and entering a portion of the cylinder wall covered by the piston during a portion of its stroke, a second conduit communicating with said chamber and means for preventing flow of lubricant from said chamber into said second conduit while permitting flow of lubricant from said second conduit into said chamber, said chamber being closed above the points of communication of the conduits to form an air dome, whereby, when lubricant is forced into said chamber through said second conduit, air is compressed in said chamber, the expansion 0 which air causes lubricant to flow through the first mentioned conduit into said cylinder.

8. In combination with a series of engine cylinders having reciprocating pistons therein,-lubricating means comprising a chamber for each cylinder, a conduit joinin each chamber with its corresponding cylin er and entering a portion of the cylinder wall cot ered by the piston during a portion of its stroke, and a header communicating with all lubricating an engine on 3o bustion engine having a cylinder and a pisaeaaeee of the chambers, each of the chambers being closed above the points of communication with the header and its conduit to form an air dome whereby, when lubricant is forced into said chambers from said header, airis compressed in said chambers, the expan-' sion of which air causes lubricant to How from the chambers into the cylinders 9, In combination with a series of engine 19 cylinders having reciprocating pistons therein, lubricating means comprising a chamber for each cylinder, a conduit joining each chamber with its corresponding cylinder and entering a portion of the cylinder wall cov- 5 ered by the piston during a portion of its stroke, a header communicating with all of the chambers, and means preventing the flow of lubricant from the chambers into the header while permitting flow of lubricant go from the header into the chambers, each of the chambers being closed above the points of communication with the header and its conduit to form an air dome whereby, when lubricant is forced into the chambersfrom said header, air is compressed in said chambers, the expansion of which air causes lubricant to flow from the chambers into the cylinders.

10. In combination with an internal comton arranged to reciprocate in the cylin starting means for the engine, means operative automatically upon initiation of operation of the starting means to deliver impulsively a quantity of lubricant, a conduit entering a portion of the cylinder wall cov- 'ered by the piston during a portion of its stroke, and means arranged to receive said impulsively delivered quantity oflubricant to and in turn deliver it gradually to the cylind'er through the conduit.

11. In combination with an internal combustion engine having a series of cylinders and pistons arranged to reciprocate therein,

starting means for the engine, means operative automatically upon initiation of oper ation of the starting means to deliver impulsively a quantity of lubricant, conduits entering portions of the cylinder walls covso ered by the pistons during portions of their strokes and means arranged to receive said impulsively delivered quantity of lubricant and in turn deliver it gradually to the cylinders through the conduits.

In testimony of which invention, I hav hereunto set my hand, at Montchanin, Delaware, on this 19th day of May, 1927.

ELEUTHERE PAUL DUPONT.